????

.cargo/config.toml

@@ -0,0 +1,2 @@
+[registries.strafesnet]
+index = "sparse+https://git.itzana.me/api/packages/strafesnet/cargo/"

Cargo.toml

@@ -1,13 +1,30 @@
 [workspace]
 members = [
+	"integration-tests",
 	"lib",
 	"native-player",
+	"video-encoder",
 	"wasm-module"
 ]
 resolver = "3"
 
+[profile.release]
+# lto = true
+strip = true
+codegen-units = 1
+
 [workspace.dependencies]
-strafesnet_common = { version = "0.8.0", registry = "strafesnet" }
-strafesnet_graphics = { version = "0.0.1", registry = "strafesnet" }
-strafesnet_roblox_bot_file = { version = "0.8.1", registry = "strafesnet" }
+glam = "0.32.0"
+wgpu = "28.0.0"
+
+strafesnet_common = { version = "0.8.6", registry = "strafesnet" }
+strafesnet_graphics = { version = "0.0.7", registry = "strafesnet" }
+strafesnet_roblox_bot_file = { version = "0.9.3", registry = "strafesnet" }
 strafesnet_snf = { version = "0.3.2", registry = "strafesnet" }
+
+strafesnet_roblox_bot_player = { version = "0.2.0", path = "lib" }
+
+# strafesnet_common = { path = "../strafe-project/lib/common" }
+# strafesnet_graphics = { path = "../strafe-project/engine/graphics" }
+# strafesnet_roblox_bot_file = { path = "../roblox_bot_file" }
+# strafesnet_snf = { path = "../strafe-project/lib/snf" }

LICENSE-APACHE

@@ -0,0 +1,176 @@
+                              Apache License
+                        Version 2.0, January 2004
+                     http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
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+
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+   reproduction, and distribution of the Work otherwise complies with
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+5. Submission of Contributions. Unless You explicitly state otherwise,
+   any Contribution intentionally submitted for inclusion in the Work
+   by You to the Licensor shall be under the terms and conditions of
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+   Notwithstanding the above, nothing herein shall supersede or modify
+   the terms of any separate license agreement you may have executed
+   with Licensor regarding such Contributions.
+
+6. Trademarks. This License does not grant permission to use the trade
+   names, trademarks, service marks, or product names of the Licensor,
+   except as required for reasonable and customary use in describing the
+   origin of the Work and reproducing the content of the NOTICE file.
+
+7. Disclaimer of Warranty. Unless required by applicable law or
+   agreed to in writing, Licensor provides the Work (and each
+   Contributor provides its Contributions) on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+   implied, including, without limitation, any warranties or conditions
+   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+   PARTICULAR PURPOSE. You are solely responsible for determining the
+   appropriateness of using or redistributing the Work and assume any
+   risks associated with Your exercise of permissions under this License.
+
+8. Limitation of Liability. In no event and under no legal theory,
+   whether in tort (including negligence), contract, or otherwise,
+   unless required by applicable law (such as deliberate and grossly
+   negligent acts) or agreed to in writing, shall any Contributor be
+   liable to You for damages, including any direct, indirect, special,
+   incidental, or consequential damages of any character arising as a
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+   Work (including but not limited to damages for loss of goodwill,
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+   has been advised of the possibility of such damages.
+
+9. Accepting Warranty or Additional Liability. While redistributing
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+   on Your own behalf and on Your sole responsibility, not on behalf
+   of any other Contributor, and only if You agree to indemnify,
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+   incurred by, or claims asserted against, such Contributor by reason
+   of your accepting any such warranty or additional liability.
+
+END OF TERMS AND CONDITIONS

LICENSE-MIT

@@ -0,0 +1,23 @@
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.

README.md

@@ -0,0 +1,50 @@
+### How to clone this repository:
+- Install git
+- Install git lfs (for test files)
+```
+git clone https://git.itzana.me/StrafesNET/roblox-bot-player
+cd roblox-bot-player
+git lfs pull
+```
+
+### How to build the wasm module:
+- Install rust
+- Install wasm-pack
+```
+cd wasm-module
+wasm-pack build --target web --out-dir ../web-demo/pkg
+```
+
+### How to serve the web demo (requires wasm module):
+- Install python3 or use your favourite http server
+```
+cd web-demo
+python3 -m http.server
+```
+
+### How to run the native player:
+- Install rust
+```
+cd native-player
+cargo run --release -- ../web-demo/bhop_marble_5692093612.snfm ../web-demo/bhop_marble_7cf33a64-7120-4514-b9fa-4fe29d9523d.qbot
+```
+You can drag and drop map files and bot files to load them.
+
+#### License
+
+This code depends on a proprietary module, [strafesnet_graphics](https://git.itzana.me/StrafesNET/strafe-project/src/branch/master/engine/graphics).  The resulting binary is
+not redistributable without the express permission of Rhys Lloyd.  The code in this repository
+is MIT & Apache 2.0 dual licensed, and is free to use.
+
+<sup>
+Licensed under either of <a href="LICENSE-APACHE">Apache License, Version
+2.0</a> or <a href="LICENSE-MIT">MIT license</a> at your option.
+</sup>
+
+<br>
+
+<sub>
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in this crate by you, as defined in the Apache-2.0 license, shall
+be dual licensed as above, without any additional terms or conditions.
+</sub>

integration-tests/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "integration-tests"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+strafesnet_common.workspace = true
+strafesnet_roblox_bot_file.workspace = true
+strafesnet_roblox_bot_player.workspace = true

integration-tests/src/main.rs

@@ -0,0 +1,25 @@
+use strafesnet_roblox_bot_file::v0;
+use strafesnet_roblox_bot_player::{bot,bvh,head};
+use head::Time as PlaybackTime;
+use strafesnet_common::session::Time as SessionTime;
+
+fn main(){
+	let bot=include_bytes!("../../web-demo/bhop_marble_7cf33a64-7120-4514-b9fa-4fe29d9523d.qbot");
+	let timelines=v0::read_all_to_block(std::io::Cursor::new(bot)).unwrap();
+	let bot=bot::CompleteBot::new(timelines);
+	let bvh=bvh::Bvh::new(&bot);
+
+	// sample the position at 0.24s
+	let mut playback0=head::PlaybackHead::new(&bot,SessionTime::ZERO);
+	for i in 0..10{
+		let sample_time=PlaybackTime::from_millis(6543+1*i);
+		playback0.set_time(&bot,SessionTime::ZERO,sample_time);
+		let pos=playback0.get_position(&bot,SessionTime::ZERO);
+
+		// get the closest time on the timeline (convert to PlaybackTime which starts at 0)
+		let closest_time=bot.playback_time(bvh.closest_time_to_point(&bot,pos).unwrap());
+		println!("time={sample_time} closest_time={closest_time}");
+	}
+	// let mut playback1=head::PlaybackHead::new(&bot,SessionTime::ZERO);
+	// playback1.set_time(&bot,SessionTime::ZERO,sample_time);
+}

lib/Cargo.toml

@@ -1,10 +1,11 @@
 [package]
 name = "strafesnet_roblox_bot_player"
-version = "0.1.0"
+version = "0.2.0"
 edition = "2024"
 
 [dependencies]
+glam.workspace = true
+wgpu.workspace = true
 strafesnet_common.workspace = true
 strafesnet_graphics.workspace = true
 strafesnet_roblox_bot_file.workspace = true
-strafesnet_snf.workspace = true

lib/src/bot.rs

@@ -0,0 +1,64 @@
+use strafesnet_common::timer::{TimerFixed,Realtime,Unpaused};
+use strafesnet_common::run::{Time as RunTime};
+use strafesnet_common::physics::{Time as PhysicsTime,TimeInner as PhysicsTimeInner};
+use strafesnet_roblox_bot_file::v0;
+
+use crate::head::{Time as PlaybackTime,TimeInner as PlaybackTimeInner};
+
+/// A loaded bot file.
+pub struct CompleteBot{
+	//Instructions
+	timelines:v0::Block,
+	timer:TimerFixed<Realtime<PlaybackTimeInner,PhysicsTimeInner>,Unpaused>,
+	duration:PhysicsTime,
+	world_offset:glam::Vec3,
+}
+impl CompleteBot{
+	pub(crate) const CAMERA_OFFSET:glam::Vec3=glam::vec3(0.0,2.0,0.0);
+	pub fn new(
+		timelines:v0::Block,
+	)->Self{
+		let start=crate::time::from_float(timelines.output_events.first().unwrap().time).unwrap();
+		let end=crate::time::from_float(timelines.output_events.last().unwrap().time).unwrap();
+		let world_position=timelines.world_events.iter().find_map(|event|match &event.event{
+			v0::WorldEvent::Reset(world_reset_event)=>Some(world_reset_event.position),
+			_=>None,
+		}).expect("Map must contain a WorldReset event");
+		Self{
+			timer:TimerFixed::new(PlaybackTime::ZERO,start),
+			duration:end-start,
+			timelines,
+			world_offset:glam::vec3(world_position.x,world_position.y,world_position.z),
+		}
+	}
+	pub fn time(&self,time:PlaybackTime)->PhysicsTime{
+		self.timer.time(time)
+	}
+	pub fn playback_time(&self,time:PhysicsTime)->PlaybackTime{
+		use strafesnet_common::timer::TimerState;
+		time.coerce()-self.timer.clone().into_state().get_offset().coerce()
+	}
+	pub const fn duration(&self)->PhysicsTime{
+		self.duration
+	}
+	pub const fn world_offset(&self)->glam::Vec3{
+		self.world_offset
+	}
+	pub const fn timelines(&self)->&v0::Block{
+		&self.timelines
+	}
+	pub fn run_duration(&self,mode_id:v0::ModeID)->Option<RunTime>{
+		let mut it=self.timelines.run_events.iter().rev();
+		let end=it.find_map(|event|match &event.event{
+			v0::RunEvent::Finish(run_start_event) if run_start_event.mode==mode_id=>Some(event.time),
+			_=>None,
+		})?;
+		let start=it.find_map(|event|match &event.event{
+			v0::RunEvent::Start(run_start_event) if run_start_event.mode==mode_id=>Some(event.time),
+			_=>None,
+		})?;
+		let start=crate::time::from_float(start).unwrap();
+		let end=crate::time::from_float(end).unwrap();
+		Some(end-start)
+	}
+}

lib/src/bvh.rs

@@ -0,0 +1,168 @@
+use core::ops::Range;
+use strafesnet_common::aabb::Aabb;
+use strafesnet_common::bvh::generate_bvh;
+use strafesnet_common::integer::vec3;
+use strafesnet_common::integer::{Fixed,Planar64};
+use strafesnet_common::physics::Time as PhysicsTime;
+use crate::bot::CompleteBot;
+use strafesnet_roblox_bot_file::v0;
+
+const MAX_SLICE_LEN:usize=16;
+struct EventSlice{
+	slice:Range<usize>,
+	inclusive:bool,
+}
+
+pub struct Bvh{
+	bvh:strafesnet_common::bvh::BvhNode<EventSlice>,
+}
+
+impl Bvh{
+	pub fn new(bot:&CompleteBot)->Self{
+		let output_events=&bot.timelines().output_events;
+		// iterator over the event timeline and capture slices of contiguous output events.
+		// create an Aabb for each slice and then generate a BVH.
+		let mut bvh_nodes=Vec::new();
+		let it=output_events
+			.array_windows()
+			.enumerate()
+			// find discontinuities
+			.filter(|&(_,[event0,event1])|
+				event0.time==event1.time&&!(
+					event0.event.position.x==event1.event.position.x
+					&&event0.event.position.y==event1.event.position.y
+					&&event0.event.position.z==event1.event.position.z
+				)
+			);
+
+		let mut last_index=0;
+		let mut push_slices=|index:usize|{
+			let len=index-last_index;
+			let count=len.div_ceil(MAX_SLICE_LEN);
+			let slice_len=MAX_SLICE_LEN;
+			println!("push_slices index={index} len={len} count={count} slice_len={slice_len}");
+			bvh_nodes.reserve(count);
+			// 0123456789
+			// split into groups of MAX_SLICE_LEN=4
+			// [0123][4567][89]
+			let mut push_slice=|slice:Range<usize>,inclusive:bool|{
+				let mut aabb=Aabb::default();
+				for event in &output_events[slice.start..slice.end]{
+					aabb.grow(vec3::try_from_f32_array([event.event.position.x,event.event.position.y,event.event.position.z]).unwrap());
+				}
+				if inclusive{
+					let event=&output_events[slice.end];
+					aabb.grow(vec3::try_from_f32_array([event.event.position.x,event.event.position.y,event.event.position.z]).unwrap());
+				}
+				println!("EventSlice slice={slice:?} {}",if inclusive{"inclusive"}else{"exclusive"});
+				bvh_nodes.push((EventSlice{slice,inclusive},aabb));
+			};
+			// push fixed-size groups
+			for i in 0..count-1{
+				push_slice((last_index+i*slice_len)..(last_index+(i+1)*slice_len),true);
+			}
+			// push last group which may be shorter
+			push_slice((last_index+(count-1)*slice_len)..index,false);
+			last_index=index;
+		};
+		// find discontinuities (teleports) and avoid forming a bvh node across them
+		for (split_index,_) in it{
+			// we want to use the index of event1
+			push_slices(split_index+1);
+		}
+		// there are no more discontinuities, push the remaining slices
+		push_slices(output_events.len());
+		let bvh=generate_bvh(bvh_nodes);
+		Self{bvh}
+	}
+	/// Find the exact timestamp on the bot timeline that is closest to the given point.
+	pub fn closest_time_to_point<'a>(&self,bot:&'a CompleteBot,point:glam::Vec3)->Option<PhysicsTime>{
+		let point=point+bot.world_offset();
+		let start_point=vec3::try_from_f32_array(point.to_array()).unwrap();
+		let output_events=&bot.timelines().output_events;
+		// grow a sphere starting at start_point until we find the closest point on the bot output events
+		let intersect_leaf=|event_slice:&EventSlice|{
+			// calculate the distance to the leaf contents
+			let mut best_distance=output_events[event_slice.slice.start..event_slice.slice.end].iter().map(|event|{
+				let p=event.event.position;
+				let p=vec3::try_from_f32_array([p.x,p.y,p.z]).unwrap();
+				(start_point-p).length_squared()
+			}).min()?;
+			let mut prev_event=&output_events[event_slice.slice.start];
+			let start_time=bot.playback_time(crate::time::from_float(prev_event.time).unwrap());
+			let mut f=|event:&'a v0::Timed<v0::OutputEvent>|{
+				let p0=vec3::try_from_f32_array([prev_event.event.position.x,prev_event.event.position.y,prev_event.event.position.z]).unwrap();
+				let p1=vec3::try_from_f32_array([event.event.position.x,event.event.position.y,event.event.position.z]).unwrap();
+				let d=p1-p0;
+				let d0=p0.dot(d);
+				let d1=p1.dot(d);
+				let sp_d=start_point.dot(d);
+				// must be on the segment
+				if d0<sp_d&&sp_d<d1{
+					let t0=d1-sp_d;
+					let t1=sp_d-d0;
+					let dt=d1-d0;
+					let distance=(((p0*t0+p1*t1)/dt).divide().wrap_1()-start_point).length_squared();
+					if distance<best_distance{
+						best_distance=distance;
+					}
+				}
+				prev_event=event;
+			};
+			for event in &output_events[event_slice.slice.start+1..event_slice.slice.end]{
+				f(event);
+			}
+			if event_slice.inclusive{
+				f(&output_events[event_slice.slice.end]);
+			}else{
+			}
+			let end_time=bot.playback_time(crate::time::from_float(prev_event.time).unwrap());
+			println!("intersect_leaf {:?} {} start_time={} end_time={}",event_slice.slice,if event_slice.inclusive{"inclusive"}else{"exclusive"},start_time,end_time);
+			Some(best_distance)
+		};
+		let intersect_aabb=|aabb:&Aabb|{
+			// calculate the distance to the aabb
+			let clamped_point=start_point.min(aabb.max()).max(aabb.min());
+			Some((start_point-clamped_point).length_squared())
+		};
+		let (_,event_slice)=self.bvh.traverse(start_point,Fixed::ZERO,Fixed::MAX,intersect_leaf,intersect_aabb)?;
+
+		// find time at the closest point
+		let (best_time,mut best_distance)=output_events[event_slice.slice.start..event_slice.slice.end].iter().map(|event|{
+			let p=event.event.position;
+			let p=vec3::try_from_f32_array([p.x,p.y,p.z]).unwrap();
+			(event.time,(start_point-p).length_squared())
+		}).min_by_key(|&(_,distance)|distance)?;
+		let mut best_time=crate::time::from_float(best_time).unwrap();
+		let mut prev_event=&output_events[event_slice.slice.start];
+		let mut f=|event:&'a v0::Timed<v0::OutputEvent>|{
+			let p0=vec3::try_from_f32_array([prev_event.event.position.x,prev_event.event.position.y,prev_event.event.position.z]).unwrap();
+			let p1=vec3::try_from_f32_array([event.event.position.x,event.event.position.y,event.event.position.z]).unwrap();
+			let d=p1-p0;
+			let d0=p0.dot(d);
+			let d1=p1.dot(d);
+			let sp_d=start_point.dot(d);
+			// must be on the segment
+			if d0<sp_d&&sp_d<d1{
+				let t0=d1-sp_d;
+				let t1=sp_d-d0;
+				let dt=d1-d0;
+				let distance=(((p0*t0+p1*t1)/dt).divide().wrap_1()-start_point).length_squared();
+				if distance<best_distance{
+					best_distance=distance;
+					let p0:Planar64=prev_event.time.try_into().unwrap();
+					let p1:Planar64=event.time.try_into().unwrap();
+					best_time=((p0*t0+p1*t1)/dt).into();
+				}
+			}
+			prev_event=event;
+		};
+		for event in &output_events[event_slice.slice.start+1..event_slice.slice.end]{
+			f(event);
+		}
+		if event_slice.inclusive{
+			f(&output_events[event_slice.slice.end]);
+		}
+		Some(best_time)
+	}
+}

lib/src/graphics.rs

@@ -0,0 +1,30 @@
+use strafesnet_graphics::graphics::GraphicsState;
+
+/// The graphics state, essentially a handle to all the information on the GPU.
+pub struct Graphics{
+	graphics:GraphicsState,
+	start_offset:glam::Vec3,
+}
+impl Graphics{
+	pub fn new(device:&wgpu::Device,queue:&wgpu::Queue,size:glam::UVec2,view_format:wgpu::TextureFormat)->Self{
+		let graphics=strafesnet_graphics::graphics::GraphicsState::new(device,queue,size,view_format);
+		Self{
+			graphics,
+			start_offset:glam::Vec3::ZERO,
+		}
+	}
+	pub fn change_map(&mut self,device:&wgpu::Device,queue:&wgpu::Queue,map:&strafesnet_common::map::CompleteMap){
+		self.graphics.clear();
+		self.graphics.generate_models(device,queue,map);
+		let modes=map.modes.clone().denormalize();
+		let mode=modes.get_mode(strafesnet_common::gameplay_modes::ModeId::MAIN).expect("Map does not have a main mode");
+		let start_zone=map.models.get(mode.get_start().get() as usize).expect("Map does not have a start zone");
+		self.start_offset=glam::Vec3::from_array(start_zone.transform.translation.map(|f|f.into()).to_array());
+	}
+	pub fn resize(&mut self,device:&wgpu::Device,size:glam::UVec2,fov:glam::Vec2){
+		self.graphics.resize(device,size,fov);
+	}
+	pub fn encode_commands(&mut self,encoder:&mut wgpu::CommandEncoder,view:&wgpu::TextureView,pos:glam::Vec3,angles:glam::Vec2){
+		self.graphics.encode_commands(encoder,view,strafesnet_graphics::graphics::view_inv(pos+self.start_offset,angles));
+	}
+}

lib/src/head.rs

@@ -0,0 +1,157 @@
+use glam::Vec3Swizzles;
+use strafesnet_common::timer::{Scaled,Timer,TimerState};
+use strafesnet_common::session::{Time as SessionTime,TimeInner as SessionTimeInner};
+use strafesnet_roblox_bot_file::v0::{EventType,Head,Timed};
+
+use crate::bot::CompleteBot;
+use crate::state::PlaybackState;
+
+fn vector3_to_glam(v:&strafesnet_roblox_bot_file::v0::Vector3)->glam::Vec3{
+	glam::vec3(v.x,v.y,v.z)
+}
+
+#[derive(Clone,Copy,Hash,Eq,PartialEq,Ord,PartialOrd,Debug)]
+pub enum TimeInner{}
+pub type Time=strafesnet_common::integer::Time<TimeInner>;
+
+/// A playback context.  Advance time and then generate a camera position to pass to the renderer.
+pub struct PlaybackHead{
+	head:Head,
+	timer:Timer<Scaled<SessionTimeInner,TimeInner>>,
+	state:PlaybackState,
+}
+impl PlaybackHead{
+	pub fn new(bot:&CompleteBot,time:SessionTime)->Self{
+		let timer=Timer::unpaused(time,Time::ZERO);
+		let head=Head::after_time(bot.timelines(),bot.time(Time::ZERO).into());
+		let mut state=PlaybackState::new();
+		state.process_head(bot.timelines(),&head);
+		Self{
+			head,
+			timer,
+			state,
+		}
+	}
+	pub const fn state(&self)->&PlaybackState{
+		&self.state
+	}
+	pub fn time(&self,time:SessionTime)->Time{
+		self.timer.time(time)
+	}
+	pub fn timer(&self)->&Timer<Scaled<SessionTimeInner,TimeInner>>{
+		&self.timer
+	}
+	pub fn set_paused(&mut self,time:SessionTime,paused:bool){
+		_=self.timer.set_paused(time,paused);
+	}
+	pub fn set_time(&mut self,bot:&CompleteBot,time:SessionTime,new_time:Time){
+		let new_time=new_time.rem_euclid(bot.duration().coerce());
+		self.timer.set_time(time,new_time);
+		// reset head
+		self.head=Head::after_time(bot.timelines(),bot.time(new_time).into());
+
+		self.state=PlaybackState::new();
+		self.state.process_head(bot.timelines(),&self.head);
+	}
+	pub fn get_scale(&self)->strafesnet_common::integer::Ratio64{
+		self.timer.get_scale()
+	}
+	pub fn set_scale(&mut self,time:SessionTime,new_scale:strafesnet_common::integer::Ratio64){
+		self.timer.set_scale(time,new_scale);
+	}
+	pub fn next_event(&self,bot:&CompleteBot)->Option<Timed<EventType>>{
+		self.head.next_event(bot.timelines())
+	}
+	pub fn process_event(&mut self,bot:&CompleteBot,event_type:EventType){
+		self.state.process_event(bot.timelines(),event_type,self.head.get_event_index(event_type));
+		self.head.push(event_type);
+	}
+	pub fn advance_time(&mut self,bot:&CompleteBot,time:SessionTime){
+		let mut simulation_time=bot.time(self.time(time));
+		let mut time_float=simulation_time.into();
+		loop{
+			match self.next_event(bot){
+				Some(next_event)=>{
+					if next_event.time<time_float{
+						self.process_event(bot,next_event.event);
+					}else{
+						break;
+					}
+				},
+				None=>{
+					//reset playback
+					self.head=Head::after_time(bot.timelines(),bot.time(Time::ZERO).into());
+					self.state=PlaybackState::new();
+					self.state.process_head(bot.timelines(),&self.head);
+
+					// hack to wind back timer offset without precise session timestamp
+					let (mut state,paused)=self.timer.clone().into_state();
+					let offset=state.get_offset()-bot.duration().coerce();
+					state.set_offset(offset);
+					self.timer=Timer::from_state(state,paused);
+
+					// update loop variables
+					simulation_time-=bot.duration();
+					time_float=simulation_time.into();
+				},
+			}
+		}
+	}
+	fn interpolate_output<'a>(&self,bot:&'a CompleteBot,time:SessionTime)->InterpolateOutput<'a>{
+		let time=bot.time(self.time(time));
+		let event0=&bot.timelines().output_events[self.head.get_event_index(EventType::Output)-1];
+		let event1=&bot.timelines().output_events[self.head.get_event_index(EventType::Output)];
+		let t0=event0.time;
+		let t1=event1.time;
+		let time_float:f64=time.into();
+		let t=((time_float-t0)/(t1-t0)) as f32;
+		InterpolateOutput{
+			event0:&event0.event,
+			event1:&event1.event,
+			t:t,
+		}
+	}
+	pub fn get_position_angles(&self,bot:&CompleteBot,time:SessionTime)->(glam::Vec3,glam::Vec2){
+		let interp=self.interpolate_output(bot,time);
+
+		let p=interp.position();
+		let a=interp.angles();
+
+		(p-bot.world_offset()+CompleteBot::CAMERA_OFFSET,a.yx())
+	}
+	pub fn get_position(&self,bot:&CompleteBot,time:SessionTime)->glam::Vec3{
+		let interp=self.interpolate_output(bot,time);
+		interp.position()-bot.world_offset()
+	}
+	pub fn get_velocity(&self,bot:&CompleteBot,time:SessionTime)->glam::Vec3{
+		let interp=self.interpolate_output(bot,time);
+		interp.velocity()
+	}
+	pub fn get_angles(&self,bot:&CompleteBot,time:SessionTime)->glam::Vec3{
+		let interp=self.interpolate_output(bot,time);
+		interp.angles()
+	}
+}
+
+struct InterpolateOutput<'a>{
+	event0:&'a strafesnet_roblox_bot_file::v0::OutputEvent,
+	event1:&'a strafesnet_roblox_bot_file::v0::OutputEvent,
+	t:f32,
+}
+impl InterpolateOutput<'_>{
+	fn position(&self)->glam::Vec3{
+		let p0=vector3_to_glam(&self.event0.position);
+		let p1=vector3_to_glam(&self.event1.position);
+		p0.lerp(p1,self.t)
+	}
+	fn velocity(&self)->glam::Vec3{
+		let v0=vector3_to_glam(&self.event0.velocity);
+		let v1=vector3_to_glam(&self.event1.velocity);
+		v0.lerp(v1,self.t)
+	}
+	fn angles(&self)->glam::Vec3{
+		let a0=vector3_to_glam(&self.event0.angles);
+		let a1=vector3_to_glam(&self.event1.angles);
+		a0.lerp(a1,self.t)
+	}
+}

lib/src/lib.rs

@@ -0,0 +1,6 @@
+pub mod bot;
+pub mod bvh;
+pub mod head;
+pub mod time;
+pub mod state;
+pub mod graphics;

lib/src/state.rs

@@ -0,0 +1,292 @@
+use std::collections::HashMap;
+
+use strafesnet_common::run;
+use strafesnet_common::physics::Time as PhysicsTime;
+use strafesnet_roblox_bot_file::v0;
+
+pub struct Run{
+	run:run::RunState,
+	flag_reason:Option<v0::FlagReason>,
+}
+impl Run{
+	fn new()->Self{
+		Self{
+			run:run::RunState::Created,
+			flag_reason:None,
+		}
+	}
+	fn flag(&mut self,flag_reason:v0::FlagReason){
+		if self.flag_reason.is_none(){
+			self.flag_reason=Some(flag_reason);
+		}
+	}
+	pub fn time(&self,time:PhysicsTime)->run::Time{
+		self.run.time(time)
+	}
+	pub fn is_invalid(&self)->bool{
+		self.flag_reason.is_some()
+	}
+	pub fn is_in_progress(&self)->bool{
+		matches!(&self.run,run::RunState::Started{..})
+	}
+	pub fn is_finished(&self)->bool{
+		matches!(&self.run,run::RunState::Finished{..})
+	}
+	pub fn get_flag_reason_text(&self)->Option<&'static str>{
+		Some(match self.flag_reason{
+			Some(v0::FlagReason::Anticheat)=>"Passed through anticheat zone.",
+			Some(v0::FlagReason::StyleChange)=>"Changed style.",
+			Some(v0::FlagReason::Clock)=>"Incorrect clock.  (This can be caused by internet hiccups)",
+			Some(v0::FlagReason::Pause)=>"Pausing is not allowed in this style.",
+			Some(v0::FlagReason::Flying)=>"Flying is not allowed in this style.",
+			Some(v0::FlagReason::Gravity)=>"Gravity modification is not allowed in this style.",
+			Some(v0::FlagReason::Timescale)=>"Timescale is not allowed in this style.",
+			Some(v0::FlagReason::Timetravel)=>"Time travel is not allowed in this style.",
+			Some(v0::FlagReason::Teleport)=>"Illegal teleport.",
+			Some(v0::FlagReason::Practice)=>"Practice mode triggers invalidation.",
+			None=>return None,
+		})
+	}
+}
+
+pub struct PlaybackState{
+	// EventType::Input
+	game_controls:v0::GameControls,
+	mouse_pos:v0::Vector2,
+	// EventType::Output
+	jump_count:u32,
+	angles:v0::Vector3,
+	angles_delta:glam::Vec3,
+	// EventType::Sound
+	// EventType::World
+	// EventType::Gravity
+	gravity:v0::Vector3,
+	// EventType::Run
+	runs:HashMap<v0::ModeID,Run>,
+	style:v0::Style,
+	// EventType::Camera
+	// TODO: camera punch
+	// EventType::Setting
+	absolute_sensitivity_enabled:bool,
+	fov_y:f64,
+	sens_x:f64,
+	vertical_sensitivity_multipler:f64,
+	turn_speed:f64,
+}
+impl PlaybackState{
+	pub fn new()->Self{
+		Self{
+			game_controls:v0::GameControls::empty(),
+			mouse_pos:v0::Vector2{x:0.0,y:0.0},
+			jump_count:0,
+			angles:v0::Vector3{x:0.0,y:0.0,z:0.0},
+			angles_delta:glam::Vec3::ZERO,
+			gravity:v0::Vector3{x:0.0,y:0.0,z:0.0},
+			runs:HashMap::new(),
+			style:v0::Style::Autohop,
+			absolute_sensitivity_enabled:false,
+			fov_y:1.0,
+			sens_x:0.3,
+			vertical_sensitivity_multipler:1.0,
+			turn_speed:core::f64::consts::TAU/0.715588,
+		}
+	}
+	pub fn get_run(&self,mode:v0::ModeID)->Option<&Run>{
+		self.runs.get(&mode)
+	}
+	fn push_output(&mut self,event:&v0::OutputEvent){
+		// Jumps may occur during a substep
+		if event.tick_info.contains(v0::TickInfo::Jump){
+			self.jump_count+=1;
+		}
+		// Game tick "end", i.e. not a sub-step
+		if event.tick_info.contains(v0::TickInfo::TickEnd){
+			self.angles_delta=glam::vec3(event.angles.x,event.angles.y,event.angles.z)-glam::vec3(self.angles.x,self.angles.y,self.angles.z);
+			self.angles=event.angles;
+		}
+	}
+	fn push_input(&mut self,event:&v0::InputEvent){
+		self.game_controls=event.game_controls;
+		self.mouse_pos=event.mouse_pos;
+	}
+	fn push_gravity(&mut self,event:&v0::GravityEvent){
+		self.gravity=event.gravity;
+	}
+	fn push_run(&mut self,event:&v0::Timed<v0::RunEvent>){
+		match &event.event{
+			v0::RunEvent::Prepare(run_event_prepare)=>{
+				self.runs.insert(run_event_prepare.mode,Run::new());
+				self.style=run_event_prepare.style;
+			},
+			v0::RunEvent::Start(run_event_zone)=>{
+				let time=crate::time::from_float(event.time).unwrap();
+				if let Some(run)=self.runs.get_mut(&run_event_zone.mode){
+					_=run.run.start(time);
+				}
+			},
+			v0::RunEvent::Finish(run_event_zone)=>{
+				let time=crate::time::from_float(event.time).unwrap();
+				if let Some(run)=self.runs.get_mut(&run_event_zone.mode){
+					_=run.run.finish(time);
+				}
+			},
+			v0::RunEvent::Clear(run_event_clear)=>{
+				match run_event_clear.mode{
+					v0::ModeSpec::Exactly(mode_id)=>{
+						self.runs.remove(&mode_id);
+					},
+					v0::ModeSpec::All=>{
+						self.runs.clear();
+					},
+					v0::ModeSpec::Invalid=>{
+						self.runs.retain(|_,run|!run.is_invalid());
+					},
+					v0::ModeSpec::InProgress=>{
+						self.runs.retain(|_,run|!run.is_in_progress());
+					},
+				}
+			},
+			v0::RunEvent::Flag(run_event_flag)=>{
+				match run_event_flag.mode{
+					v0::ModeSpec::Exactly(mode_id)=>{
+						if let Some(run)=self.runs.get_mut(&mode_id){
+							run.flag(run_event_flag.flag_reason);
+						}
+					},
+					v0::ModeSpec::All=>{
+						for run in self.runs.values_mut(){
+							run.flag(run_event_flag.flag_reason);
+						}
+					},
+					v0::ModeSpec::Invalid=>{
+						for run in self.runs.values_mut(){
+							if run.is_invalid(){
+								run.flag(run_event_flag.flag_reason);
+							}
+						}
+					},
+					v0::ModeSpec::InProgress=>{
+						for run in self.runs.values_mut(){
+							if run.is_in_progress(){
+								run.flag(run_event_flag.flag_reason);
+							}
+						}
+					},
+				}
+			},
+			// these should never appear in a uploaded bot file,
+			// they are just part of the network protocol for spectating
+			// someone in practice mode.
+			//
+			// Yes, this is a design mistake.
+			// I didn't understand Session vs Simulation when I rewrote bhop in 2022
+			v0::RunEvent::LoadState(_run_event_practice)=>{},
+			v0::RunEvent::SaveState(_run_event_practice)=>{},
+		}
+	}
+	fn push_setting(&mut self,event:&v0::SettingEvent){
+		match event{
+			v0::SettingEvent::FieldOfView(setting_event_field_of_view)=>{
+				self.fov_y=(setting_event_field_of_view.fov*0.5).to_radians().tan();
+			},
+			v0::SettingEvent::Sensitivity(setting_event_sensitivity)=>{
+				self.sens_x=setting_event_sensitivity.sensitivity;
+			},
+			v0::SettingEvent::VerticalSensitivityMultiplier(setting_event_vertical_sensitivity_multiplier)=>{
+				self.vertical_sensitivity_multipler=setting_event_vertical_sensitivity_multiplier.multiplier;
+			},
+			v0::SettingEvent::AbsoluteSensitivity(setting_event_absolute_sensitivity)=>{
+				self.absolute_sensitivity_enabled=setting_event_absolute_sensitivity.enabled;
+			},
+			v0::SettingEvent::TurnSpeed(setting_event_turn_speed)=>{
+				self.turn_speed=setting_event_turn_speed.turn_speed;
+			},
+		}
+	}
+	pub(crate) fn process_head(&mut self,block:&v0::Block,head:&v0::Head){
+		// Avoid running the realtime events from the beginning.
+		// Run the preceding input event to initialize the state.
+		if let Some(index)=head.get_event_index(v0::EventType::Input).checked_sub(1)
+			&&let Some(event)=block.input_events.get(index)
+		{
+			self.push_input(&event.event);
+		}
+
+		// Helper function
+		fn is_output_tick_end(&(_,event):&(usize,&v0::Timed<v0::OutputEvent>))->bool{
+			event.event.tick_info.contains(v0::TickInfo::TickEnd)
+		}
+		// Run two preceding output events to flush out the default state.
+		let output_end_index=head.get_event_index(v0::EventType::Output);
+		let mut it=block.output_events[..output_end_index].iter().enumerate().rev();
+		// Find two TickEnd events before output_end_index
+		let _first=it.find(is_output_tick_end);
+		let second=it.find(is_output_tick_end);
+		// Get the index at the second event, if two TickEnd events don't exist then start at 0
+		let output_start_index=second.map_or(0,|(i,_)|i);
+		for event in &block.output_events[output_start_index..output_end_index]{
+			self.push_output(&event.event);
+		}
+
+		// for event in &bot.sound_events[0..head.get_event_index(v0::EventType::Sound)]{
+		// 	self.push_sound(&event.event);
+		// }
+
+		// Offline events have to be run from the beginning because they contain cumulative state.
+		// for event in &bot.world_events[0..head.get_event_index(v0::EventType::World)]{
+		// 	self.push_world(&event.event);
+		// }
+
+		// Except for gravity, only the most recent event is relevant.
+		if let Some(index)=head.get_event_index(v0::EventType::Gravity).checked_sub(1)
+			&&let Some(event)=block.gravity_events.get(index)
+		{
+			self.push_gravity(&event.event);
+		}
+		for event in &block.run_events[0..head.get_event_index(v0::EventType::Run)]{
+			self.push_run(event);
+		}
+		// for event in &bot.camera_events[0..head.get_event_index(v0::EventType::Camera)]{
+		// 	self.push_camera(&event.event);
+		// }
+		for event in &block.setting_events[0..head.get_event_index(v0::EventType::Setting)]{
+			self.push_setting(&event.event);
+		}
+	}
+	pub(crate) fn process_event(&mut self,block:&v0::Block,event_type:v0::EventType,event_index:usize){
+		match event_type{
+			v0::EventType::Input=>self.push_input(&block.input_events[event_index].event),
+			v0::EventType::Output=>self.push_output(&block.output_events[event_index].event),
+			v0::EventType::Sound=>{},
+			v0::EventType::World=>{},
+			v0::EventType::Gravity=>self.push_gravity(&block.gravity_events[event_index].event),
+			v0::EventType::Run=>self.push_run(&block.run_events[event_index]),
+			v0::EventType::Camera=>{},
+			v0::EventType::Setting=>self.push_setting(&block.setting_events[event_index].event),
+		}
+	}
+	pub const fn get_fov_y(&self)->f64{
+		let zoom_enabled=self.game_controls.contains(v0::GameControls::Zoom);
+		if zoom_enabled{self.fov_y*0.2}else{self.fov_y}
+	}
+	pub const fn get_sensitivity(&self)->glam::DVec2{
+		if self.absolute_sensitivity_enabled{
+			glam::dvec2(self.sens_x,self.sens_x*self.vertical_sensitivity_multipler)
+		}else{
+			let sens_x=self.sens_x*self.get_fov_y()/128.0;
+			glam::dvec2(sens_x,sens_x*self.vertical_sensitivity_multipler)
+		}
+	}
+	pub const fn get_controls(&self)->v0::GameControls{
+		self.game_controls
+	}
+	pub const fn get_jump_count(&self)->u32{
+		self.jump_count
+	}
+	pub const fn get_gravity(&self)->v0::Vector3{
+		self.gravity
+	}
+	pub const fn get_angles_delta(&self)->glam::Vec3{
+		self.angles_delta
+	}
+}

lib/src/time.rs

@@ -0,0 +1,32 @@
+use strafesnet_common::integer::Time;
+
+#[derive(Debug)]
+pub enum Error{
+	Underflow,
+	Overflow,
+	Nan,
+}
+impl std::fmt::Display for Error{
+	fn fmt(&self,f:&mut std::fmt::Formatter<'_>)->std::fmt::Result{
+		write!(f,"{self:?}")
+	}
+}
+impl std::error::Error for Error{}
+
+pub fn from_float<T>(time:f64)->Result<Time<T>,Error>{
+	match time.classify(){
+		core::num::FpCategory::Nan=>Err(Error::Nan),
+		core::num::FpCategory::Zero=>Ok(Time::ZERO),
+		core::num::FpCategory::Infinite
+		|core::num::FpCategory::Subnormal
+		|core::num::FpCategory::Normal=>{
+			if time<Time::<T>::MIN.get() as f64{
+				return Err(Error::Underflow);
+			}
+			if (Time::<T>::MAX.get() as f64)<time{
+				return Err(Error::Overflow);
+			}
+			Ok(Time::raw((time*Time::<T>::ONE_SECOND.get() as f64) as i64))
+		}
+	}
+}

native-player/Cargo.toml

@@ -4,4 +4,12 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
-strafesnet_roblox_bot_player = { version = "0.1.0", path = "../lib" }
+pollster = "0.4.0"
+winit = "0.30.12"
+glam.workspace = true
+wgpu.workspace = true
+strafesnet_roblox_bot_player.workspace = true
+strafesnet_common.workspace = true
+strafesnet_graphics.workspace = true
+strafesnet_roblox_bot_file.workspace = true
+strafesnet_snf.workspace = true

native-player/src/app.rs

@@ -0,0 +1,68 @@
+use crate::window::Instruction;
+use strafesnet_common::integer;
+use strafesnet_common::instruction::TimedInstruction;
+use crate::window::WindowContext;
+
+pub struct App<'a>{
+	root_time:std::time::Instant,
+	window_thread:WindowContext<'a>,
+}
+impl<'a> App<'a>{
+	pub fn new(
+		root_time:std::time::Instant,
+		window_thread:WindowContext<'a>,
+	)->App<'a>{
+		Self{
+			root_time,
+			window_thread,
+		}
+	}
+	fn send_timed_instruction(&mut self,instruction:Instruction){
+		let time=integer::Time::from_nanos(self.root_time.elapsed().as_nanos() as i64);
+		self.window_thread.send(TimedInstruction{time,instruction});
+	}
+}
+impl winit::application::ApplicationHandler for App<'_>{
+	fn resumed(&mut self,_event_loop:&winit::event_loop::ActiveEventLoop){
+		//
+	}
+
+	fn window_event(
+		&mut self,
+		event_loop:&winit::event_loop::ActiveEventLoop,
+		_window_id:winit::window::WindowId,
+		event:winit::event::WindowEvent,
+	){
+		match event{
+			winit::event::WindowEvent::KeyboardInput{
+				event:winit::event::KeyEvent{
+					logical_key:winit::keyboard::Key::Named(winit::keyboard::NamedKey::Escape),
+					state:winit::event::ElementState::Pressed,
+					..
+				},
+				..
+			}
+			|winit::event::WindowEvent::CloseRequested=>{
+				event_loop.exit();
+			},
+			_=>(),
+		}
+		self.send_timed_instruction(Instruction::WindowEvent(event));
+	}
+
+	fn device_event(
+		&mut self,
+		_event_loop:&winit::event_loop::ActiveEventLoop,
+		_device_id:winit::event::DeviceId,
+		event:winit::event::DeviceEvent,
+	){
+		self.send_timed_instruction(Instruction::DeviceEvent(event));
+	}
+
+	fn about_to_wait(
+		&mut self,
+		_event_loop:&winit::event_loop::ActiveEventLoop
+	){
+		self.send_timed_instruction(Instruction::WindowEvent(winit::event::WindowEvent::RedrawRequested));
+	}
+}

native-player/src/file.rs

@@ -0,0 +1,68 @@
+use std::io::Read;
+
+#[expect(dead_code)]
+#[derive(Debug)]
+pub enum ReadError{
+	StrafesNET(strafesnet_snf::Error),
+	StrafesNETMap(strafesnet_snf::map::Error),
+	RobloxBot(strafesnet_roblox_bot_file::v0::Error),
+	Io(std::io::Error),
+	UnknownFileFormat,
+}
+impl std::fmt::Display for ReadError{
+	fn fmt(&self,f:&mut std::fmt::Formatter<'_>)->std::fmt::Result{
+		write!(f,"{self:?}")
+	}
+}
+impl std::error::Error for ReadError{}
+
+pub enum ReadFormat{
+	SNFM(strafesnet_common::map::CompleteMap),
+	QBOT(strafesnet_roblox_bot_file::v0::Block),
+}
+
+pub fn read<R:Read+std::io::Seek>(input:R)->Result<ReadFormat,ReadError>{
+	let mut buf=std::io::BufReader::new(input);
+	let peek=std::io::BufRead::fill_buf(&mut buf).map_err(ReadError::Io)?[0..4].to_owned();
+	// reading the entire file is way faster than round tripping the disk constantly
+	let mut entire_file=Vec::new();
+	buf.read_to_end(&mut entire_file).map_err(ReadError::Io)?;
+	let cursor=std::io::Cursor::new(entire_file);
+	match peek.as_slice(){
+		b"SNFM"=>Ok(ReadFormat::SNFM(
+			strafesnet_snf::read_map(cursor).map_err(ReadError::StrafesNET)?
+			.into_complete_map().map_err(ReadError::StrafesNETMap)?
+		)),
+		b"qbot"=>Ok(ReadFormat::QBOT(
+			strafesnet_roblox_bot_file::v0::read_all_to_block(cursor).map_err(ReadError::RobloxBot)?
+		)),
+		_=>Err(ReadError::UnknownFileFormat),
+	}
+}
+
+#[expect(dead_code)]
+#[derive(Debug)]
+pub enum LoadError{
+	ReadError(ReadError),
+	File(std::io::Error),
+}
+impl std::fmt::Display for LoadError{
+	fn fmt(&self,f:&mut std::fmt::Formatter<'_>)->std::fmt::Result{
+		write!(f,"{self:?}")
+	}
+}
+impl std::error::Error for LoadError{}
+
+pub enum LoadFormat{
+	Map(strafesnet_common::map::CompleteMap),
+	Bot(strafesnet_roblox_bot_file::v0::Block),
+}
+
+pub fn load<P:AsRef<std::path::Path>>(path:P)->Result<LoadFormat,LoadError>{
+	//blocking because it's simpler...
+	let file=std::fs::File::open(path).map_err(LoadError::File)?;
+	match read(file).map_err(LoadError::ReadError)?{
+		ReadFormat::QBOT(bot)=>Ok(LoadFormat::Bot(bot)),
+		ReadFormat::SNFM(map)=>Ok(LoadFormat::Map(map)),
+	}
+}

native-player/src/main.rs

@@ -1 +1,12 @@
-fn main() {}
+mod app;
+mod file;
+mod player;
+mod setup;
+mod window;
+
+
+const TITLE:&'static str=concat!("Roblox Bot Player v",env!("CARGO_PKG_VERSION"));
+
+fn main(){
+	pollster::block_on(setup::setup_and_start(TITLE));
+}

native-player/src/player.rs

@@ -0,0 +1,115 @@
+use strafesnet_common::instruction::TimedInstruction;
+use strafesnet_common::session::Time as SessionTime;
+use strafesnet_common::timer::TimerState;
+use strafesnet_roblox_bot_player::{bot::CompleteBot,graphics::Graphics,head::{PlaybackHead,Time as PlaybackTime}};
+use strafesnet_graphics::surface::Surface;
+
+pub enum SessionControlInstruction{
+	SetPaused(bool),
+	Restart,
+	SkipForward,
+	SkipBack,
+	DecreaseTimescale,
+	IncreaseTimescale,
+}
+
+pub enum Instruction{
+	SessionControl(SessionControlInstruction),
+	Render,
+	Resize(winit::dpi::PhysicalSize<u32>),
+	ChangeMap(strafesnet_common::map::CompleteMap),
+	LoadReplay(strafesnet_roblox_bot_file::v0::Block),
+}
+
+fn speed_ratio(speed:i8)->strafesnet_common::integer::Ratio64{
+	if speed.is_negative(){
+		strafesnet_common::integer::Ratio64::new(4i64.pow(-speed as u32),5u64.pow(-speed as u32)).unwrap()
+	}else{
+		strafesnet_common::integer::Ratio64::new(5i64.pow(speed as u32),4u64.pow(speed as u32)).unwrap()
+	}
+}
+
+struct Playback{
+	bot:CompleteBot,
+	playback_head:PlaybackHead,
+	playback_speed:i8,
+}
+
+pub struct PlayerWorker<'a>{
+	graphics_thread:Graphics,
+	surface:Surface<'a>,
+	playback:Option<Playback>,
+}
+impl<'a> PlayerWorker<'a>{
+	pub fn new(
+		graphics_thread:Graphics,
+		surface:Surface<'a>,
+	)->Self{
+		Self{
+			graphics_thread,
+			surface,
+			playback:None,
+		}
+	}
+	pub fn send(&mut self,device:&wgpu::Device,queue:&wgpu::Queue,ins:TimedInstruction<Instruction,SessionTime>){
+		match ins.instruction{
+			Instruction::SessionControl(SessionControlInstruction::SetPaused(paused))=>if let Some(playback)=&mut self.playback{
+				playback.playback_head.set_paused(ins.time,paused);
+			},
+			Instruction::SessionControl(SessionControlInstruction::Restart)=>if let Some(playback)=&mut self.playback{
+				playback.playback_head.set_time(&playback.bot,ins.time,PlaybackTime::ZERO);
+			},
+			Instruction::SessionControl(SessionControlInstruction::SkipForward)=>if let Some(playback)=&mut self.playback{
+				let head_time=playback.playback_head.timer().clone().into_state().0.get_time(ins.time+SessionTime::from_secs(2));
+				playback.playback_head.set_time(&playback.bot,ins.time,head_time);
+			},
+			Instruction::SessionControl(SessionControlInstruction::SkipBack)=>if let Some(playback)=&mut self.playback{
+				let head_time=playback.playback_head.timer().clone().into_state().0.get_time(ins.time-SessionTime::from_secs(2));
+				playback.playback_head.set_time(&playback.bot,ins.time,head_time);
+			},
+			Instruction::SessionControl(SessionControlInstruction::DecreaseTimescale)=>if let Some(playback)=&mut self.playback{
+				playback.playback_speed=playback.playback_speed.saturating_sub(1).max(-27);
+				playback.playback_head.set_scale(ins.time,speed_ratio(playback.playback_speed));
+			},
+			Instruction::SessionControl(SessionControlInstruction::IncreaseTimescale)=>if let Some(playback)=&mut self.playback{
+				playback.playback_speed=playback.playback_speed.saturating_add(1).min(27);
+				playback.playback_head.set_scale(ins.time,speed_ratio(playback.playback_speed));
+			},
+			Instruction::Render=>if let Some(playback)=&mut self.playback{
+				playback.playback_head.advance_time(&playback.bot,ins.time);
+				let (pos,angles)=playback.playback_head.get_position_angles(&playback.bot,ins.time);
+
+				//this has to go deeper somehow
+				let frame=self.surface.new_frame(device);
+
+				let mut encoder=device.create_command_encoder(&wgpu::CommandEncoderDescriptor{label:None});
+
+				self.graphics_thread.encode_commands(&mut encoder,frame.view(),pos,angles);
+
+				queue.submit([encoder.finish()]);
+
+				frame.present();
+			},
+			Instruction::Resize(physical_size)=>if let Some(playback)=&self.playback{
+				let fov_y=playback.playback_head.state().get_fov_y();
+				let fov_x=fov_y*physical_size.width as f64/physical_size.height as f64;
+				let fov=glam::vec2(fov_x as f32,fov_y as f32);
+				let size=glam::uvec2(physical_size.width,physical_size.height);
+				self.surface.configure(device,size);
+				self.graphics_thread.resize(device,size,fov);
+			},
+			Instruction::ChangeMap(complete_map)=>{
+				self.graphics_thread.change_map(device,queue,&complete_map);
+			},
+			Instruction::LoadReplay(bot)=>{
+				let bot=CompleteBot::new(bot);
+				let playback_head=PlaybackHead::new(&bot,SessionTime::ZERO);
+				self.playback=Some(Playback{
+					bot,
+					playback_head,
+					playback_speed:0,
+				});
+			},
+		}
+	}
+}

native-player/src/setup.rs

@@ -0,0 +1,50 @@
+use strafesnet_graphics::setup;
+
+fn create_window(title:&str,event_loop:&winit::event_loop::EventLoop<()>)->Result<winit::window::Window,winit::error::OsError>{
+	let mut attr=winit::window::WindowAttributes::default();
+	attr=attr.with_title(title);
+	event_loop.create_window(attr)
+}
+
+pub async fn setup_and_start(title:&str){
+	let event_loop=winit::event_loop::EventLoop::new().unwrap();
+
+	let window=create_window(title,&event_loop).unwrap();
+
+	println!("Initializing the surface...");
+
+	let instance=setup::step1::create_instance();
+
+	let surface=setup::step2::create_surface(&instance,&window).unwrap();
+
+	let adapter=setup::step3::pick_adapter(&instance,&surface).await.expect("No suitable GPU adapters found on the system!");
+
+	let (device,queue)=setup::step4::request_device(&adapter).await.unwrap();
+
+	let size=window.inner_size();
+	let surface=setup::step5::configure_surface(&adapter,&device,surface,(size.width,size.height)).unwrap();
+
+	//dedicated thread to ping request redraw back and resize the window doesn't seem logical
+
+	//the thread that spawns the physics thread
+	let mut window_thread=crate::window::WindowContext::new(
+		&window,
+		device,
+		queue,
+		surface,
+	);
+
+	for arg in std::env::args().skip(1){
+		window_thread.send(strafesnet_common::instruction::TimedInstruction{
+			time:strafesnet_common::integer::Time::ZERO,
+			instruction:crate::window::Instruction::WindowEvent(winit::event::WindowEvent::DroppedFile(arg.into())),
+		});
+	};
+
+	println!("Entering event loop...");
+	let mut app=crate::app::App::new(
+		std::time::Instant::now(),
+		window_thread
+	);
+	event_loop.run_app(&mut app).unwrap();
+}

native-player/src/window.rs

@@ -0,0 +1,144 @@
+use strafesnet_common::instruction::TimedInstruction;
+use strafesnet_common::session::Time as SessionTime;
+use crate::file::LoadFormat;
+use crate::player::{PlayerWorker,Instruction as PhysicsWorkerInstruction,SessionControlInstruction};
+
+pub enum Instruction{
+	WindowEvent(winit::event::WindowEvent),
+	DeviceEvent(winit::event::DeviceEvent),
+}
+
+//holds thread handles to dispatch to
+pub struct WindowContext<'a>{
+	simulation_paused:bool,
+	window:&'a winit::window::Window,
+	physics_thread:PlayerWorker<'a>,
+	device:wgpu::Device,
+	queue:wgpu::Queue,
+}
+
+impl WindowContext<'_>{
+	fn phys(&mut self,ins:TimedInstruction<crate::player::Instruction,strafesnet_common::session::Time>){
+		self.physics_thread.send(&self.device,&self.queue,ins);
+	}
+	fn window_event(&mut self,time:SessionTime,event:winit::event::WindowEvent){
+		match event{
+			winit::event::WindowEvent::DroppedFile(path)=>{
+				match crate::file::load(path.as_path()){
+					Ok(LoadFormat::Map(map))=>self.phys(TimedInstruction{time,instruction:PhysicsWorkerInstruction::ChangeMap(map)}),
+					Ok(LoadFormat::Bot(bot))=>self.phys(TimedInstruction{time,instruction:PhysicsWorkerInstruction::LoadReplay(bot)}),
+					Err(e)=>println!("Failed to load file: {e}"),
+				}
+			},
+			winit::event::WindowEvent::Focused(state)=>{
+				// don't unpause if manually paused
+				if self.simulation_paused{
+					return;
+				}
+				//pause unpause
+				self.phys(TimedInstruction{
+					time,
+					instruction:PhysicsWorkerInstruction::SessionControl(SessionControlInstruction::SetPaused(!state)),
+				});
+				//recalculate pressed keys on focus
+			},
+			winit::event::WindowEvent::KeyboardInput{
+				event:winit::event::KeyEvent{state,logical_key,repeat:false,..},
+				..
+			}=>{
+				match (logical_key,state){
+					(winit::keyboard::Key::Named(winit::keyboard::NamedKey::F11),winit::event::ElementState::Pressed)=>{
+						if self.window.fullscreen().is_some(){
+							self.window.set_fullscreen(None);
+						}else{
+							self.window.set_fullscreen(Some(winit::window::Fullscreen::Borderless(None)));
+						}
+					},
+					(keycode,state)=>{
+						let s=state.is_pressed();
+
+						macro_rules! session_ctrl{
+							($variant:ident,$state:expr)=>{
+								s.then_some(PhysicsWorkerInstruction::SessionControl(SessionControlInstruction::$variant))
+							};
+						}
+
+						if let Some(instruction)=match keycode{
+							winit::keyboard::Key::Named(winit::keyboard::NamedKey::Space)=>if s{
+								let paused=!self.simulation_paused;
+								self.simulation_paused=paused;
+								Some(PhysicsWorkerInstruction::SessionControl(SessionControlInstruction::SetPaused(paused)))
+							}else{None},
+							winit::keyboard::Key::Named(winit::keyboard::NamedKey::ArrowUp)=>session_ctrl!(IncreaseTimescale,s),
+							winit::keyboard::Key::Named(winit::keyboard::NamedKey::ArrowDown)=>session_ctrl!(DecreaseTimescale,s),
+							winit::keyboard::Key::Named(winit::keyboard::NamedKey::ArrowLeft)=>session_ctrl!(SkipBack,s),
+							winit::keyboard::Key::Named(winit::keyboard::NamedKey::ArrowRight)=>session_ctrl!(SkipForward,s),
+							winit::keyboard::Key::Character(key)=>match key.as_str(){
+								"R"|"r"=>session_ctrl!(Restart,s),
+								_=>None,
+							},
+							_=>None,
+						}{
+							self.phys(TimedInstruction{
+								time,
+								instruction,
+							});
+						}
+					},
+				}
+			},
+			winit::event::WindowEvent::Resized(size)=>{
+				self.phys(
+					TimedInstruction{
+						time,
+						instruction:PhysicsWorkerInstruction::Resize(size)
+					}
+				);
+			},
+			winit::event::WindowEvent::RedrawRequested=>{
+				self.window.request_redraw();
+				self.phys(
+					TimedInstruction{
+						time,
+						instruction:PhysicsWorkerInstruction::Render
+					}
+				);
+			},
+			_=>(),
+		}
+	}
+
+	fn device_event(&mut self,_time:SessionTime,_event:winit::event::DeviceEvent){
+	}
+
+	pub fn send(&mut self,ins:TimedInstruction<Instruction,SessionTime>){
+		match ins.instruction{
+			Instruction::WindowEvent(window_event)=>{
+				self.window_event(ins.time,window_event);
+			},
+			Instruction::DeviceEvent(device_event)=>{
+				self.device_event(ins.time,device_event);
+			},
+		}
+	}
+
+	pub fn new<'a>(
+		window:&'a winit::window::Window,
+		device:wgpu::Device,
+		queue:wgpu::Queue,
+		surface:strafesnet_graphics::surface::Surface<'a>,
+	)->WindowContext<'a>{
+		let size=surface.size();
+		let graphics=strafesnet_roblox_bot_player::graphics::Graphics::new(&device,&queue,size,surface.view_format());
+		WindowContext{
+			simulation_paused:false,
+			window,
+			physics_thread:crate::player::PlayerWorker::new(
+				graphics,
+				surface,
+			),
+			device,
+			queue,
+		}
+	}
+}

video-encoder/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "video-encoder"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+glam.workspace = true
+wgpu.workspace = true
+strafesnet_roblox_bot_player.workspace = true
+strafesnet_common.workspace = true
+strafesnet_graphics.workspace = true
+strafesnet_roblox_bot_file.workspace = true
+strafesnet_snf.workspace = true
+vk-video = "0.2.0"
+clap = { version = "4.5.60", features = ["derive"] }
+mp4 = "0.14.0"

video-encoder/README.md

@@ -0,0 +1,4 @@
+### How it works
+- Render RGB to graphics_texture
+- Convert RGB to YUV on video_texture
+- Encode video frame

video-encoder/shaders/rgb_to_yuv.wgsl

@@ -0,0 +1,55 @@
+struct VertexOutput {
+	@builtin(position) position: vec4<f32>,
+	@location(1) uv: vec2<f32>,
+}
+
+@vertex
+fn vs_main(@builtin(vertex_index) vertex_index: u32) -> VertexOutput {
+	// hacky way to draw a large triangle
+	let tmp1 = i32(vertex_index) / 2;
+	let tmp2 = i32(vertex_index) & 1;
+	var result:VertexOutput;
+	result.position=vec4<f32>(
+		f32(tmp1) * 4.0 - 1.0,
+		f32(tmp2) * 4.0 - 1.0,
+		1.0,
+		1.0
+	);
+	result.uv=vec2<f32>(
+		f32(tmp1) * 2.0,
+		1.0 - f32(tmp2) * 2.0
+	);
+	return result;
+}
+
+@group(0)
+@binding(0)
+var texture: texture_2d<f32>;
+@group(0)
+@binding(1)
+var texture_sampler: sampler;
+
+const RGB_TO_Y:vec3<f32> =
+	vec3(0.2126,0.7152,0.0722);
+const RGB_TO_UV:mat3x2<f32> = mat3x2<f32>(
+	-0.09991,0.615,
+	-0.33609,-0.55861,
+	0.436,-0.05639
+);
+const BIAS:vec2<f32> = vec2<f32>(0.5, 0.5);
+
+@fragment
+fn fs_main_y(input: VertexOutput) -> @location(0) f32 {
+	let color = textureSample(texture, texture_sampler, input.uv).rgb;
+	let y = dot(RGB_TO_Y,color);
+	let y_limited = mix(16.0/255.0,240.0/255.0,y);
+	return clamp(y_limited, 0.0, 1.0);
+}
+
+@fragment
+fn fs_main_uv(input: VertexOutput) -> @location(0) vec2<f32> {
+	let color = textureSample(texture, texture_sampler, input.uv).rgb;
+	let uv = RGB_TO_UV * color + BIAS;
+	let uv_limited = mix(vec2(16.0/255.0),vec2(240.0/255.0),uv);
+	return clamp(uv_limited, vec2(0.0, 0.0), vec2(1.0, 1.0));
+}

video-encoder/src/encode.rs

@@ -0,0 +1,509 @@
+use std::num::NonZeroU32;
+use std::path::PathBuf;
+use strafesnet_common::session::Time as SessionTime;
+
+#[derive(clap::Subcommand)]
+pub enum Commands{
+	Encode(EncodeSubcommand),
+}
+
+impl Commands{
+	pub fn run(self){
+		match self{
+			Commands::Encode(command)=>command.run().unwrap(),
+		}
+	}
+}
+
+#[derive(clap::Args)]
+pub struct EncodeSubcommand{
+	#[arg(long,short)]
+	map:PathBuf,
+	#[arg(long,short)]
+	bot:PathBuf,
+	#[arg(long,short)]
+	output_file:Option<PathBuf>,
+	#[arg(long,short)]
+	width:Option<NonZeroU32>,
+	#[arg(long,short)]
+	height:Option<NonZeroU32>,
+	#[arg(long)]
+	fps:Option<u32>,
+	#[arg(long)]
+	target_bitrate:Option<u64>,
+	#[arg(long)]
+	max_bitrate:Option<u64>,
+	#[arg(long)]
+	device:Option<String>,
+}
+impl EncodeSubcommand{
+	fn run(self)->Result<(),EncodeError>{
+		encode(EncodeParams{
+			width:self.width.unwrap_or(NonZeroU32::new(1920).unwrap()),
+			height:self.width.unwrap_or(NonZeroU32::new(1080).unwrap()),
+			target_framerate:self.fps.unwrap_or(60),
+			average_bitrate:self.target_bitrate.unwrap_or(6_000_000),
+			max_bitrate:self.max_bitrate.unwrap_or(6_000_000),
+			device:self.device,
+			output_file:self.output_file.unwrap_or_else(||{
+				let mut output_file:PathBuf=self.bot.file_stem().unwrap().into();
+				output_file.set_extension("mp4");
+				output_file
+			}),
+			map:self.map,
+			bot:self.bot,
+		})
+	}
+}
+
+#[expect(dead_code)]
+#[derive(Debug)]
+enum EncodeError{
+	ReadMap(std::io::Error),
+	ReadBot(std::io::Error),
+	DecodeSNF(strafesnet_snf::Error),
+	DecodeMap(strafesnet_snf::map::Error),
+	DecodeBot(strafesnet_roblox_bot_file::v0::Error),
+	CreateInstance(vk_video::VulkanInitError),
+	CreateAdapter(vk_video::VulkanInitError),
+	NoAdapter,
+	CreateDevice(vk_video::VulkanInitError),
+	VideoEncodeParams(vk_video::VulkanEncoderError),
+	VideoCreateTextures(vk_video::VulkanEncoderError),
+	VideoEncodeFrame(vk_video::VulkanEncoderError),
+	OutputCreateFile(std::io::Error),
+	OutputMp4Start(mp4::Error),
+	OutputMp4AddTrack(mp4::Error),
+	OutputMp4WriteSample(mp4::Error),
+	OutputMp4End(mp4::Error),
+}
+
+struct EncodeParams{
+	width:NonZeroU32,
+	height:NonZeroU32,
+	target_framerate:u32,
+	average_bitrate:u64,
+	max_bitrate:u64,
+	device:Option<String>,
+	map:PathBuf,
+	bot:PathBuf,
+	output_file:PathBuf,
+}
+
+fn encode(params:EncodeParams)->Result<(),EncodeError>{
+	let size = glam::uvec2(params.width.get(),params.height.get());
+	let target_framerate = params.target_framerate;
+	let average_bitrate = params.average_bitrate;
+	let max_bitrate = params.max_bitrate;
+
+	let map_file=std::fs::read(params.map).map_err(EncodeError::ReadMap)?;
+	let bot_file=std::fs::read(params.bot).map_err(EncodeError::ReadBot)?;
+
+	// read files
+	let map=strafesnet_snf::read_map(std::io::Cursor::new(map_file))
+		.map_err(EncodeError::DecodeSNF)?
+		.into_complete_map()
+		.map_err(EncodeError::DecodeMap)?;
+	let timelines=strafesnet_roblox_bot_file::v0::read_all_to_block(std::io::Cursor::new(bot_file))
+		.map_err(EncodeError::DecodeBot)?;
+
+	// vulkan init
+	let vulkan_instance = vk_video::VulkanInstance::new().map_err(EncodeError::CreateInstance)?;
+	let vulkan_adapter = if let Some(filter)=params.device.as_deref(){
+		vulkan_instance.iter_adapters(None)
+			.map_err(EncodeError::CreateAdapter)?
+			.find(|adapter|adapter.info().name.contains(filter))
+			.ok_or(EncodeError::NoAdapter)?
+	}else{
+		vulkan_instance.create_adapter(None).map_err(EncodeError::CreateAdapter)?
+	};
+	let vulkan_device = vulkan_adapter
+		.create_device(
+			wgpu::Features::TEXTURE_COMPRESSION_BC,
+			wgpu::ExperimentalFeatures::disabled(),
+			wgpu::Limits::defaults(),
+		)
+		.map_err(EncodeError::CreateDevice)?;
+
+	// playback
+	let bot=strafesnet_roblox_bot_player::bot::CompleteBot::new(timelines);
+	let mut playback_head=strafesnet_roblox_bot_player::head::PlaybackHead::new(&bot,SessionTime::ZERO);
+
+	let mut wgpu_state = WgpuState::new(
+		vulkan_device.wgpu_device(),
+		vulkan_device.wgpu_queue(),
+		size,
+	);
+
+	wgpu_state.change_map(&map);
+
+	let mut encoder = vulkan_device
+		.create_wgpu_textures_encoder(
+			vulkan_device
+				.encoder_parameters_high_quality(
+					vk_video::parameters::VideoParameters {
+						width:params.width,
+						height:params.height,
+						target_framerate:target_framerate.into(),
+					},
+					vk_video::parameters::RateControl::VariableBitrate {
+						average_bitrate,
+						max_bitrate,
+						virtual_buffer_size: std::time::Duration::from_secs(2),
+					},
+				)
+				.map_err(EncodeError::VideoEncodeParams)?,
+		)
+		.map_err(EncodeError::VideoCreateTextures)?;
+
+	let output_file=std::fs::File::create(params.output_file)
+		.map_err(EncodeError::OutputCreateFile)?;
+
+	let mp4_config=mp4::Mp4Config{
+		major_brand: str::parse("isom").unwrap(),
+		minor_version: 512,
+		compatible_brands: vec![
+			str::parse("isom").unwrap(),
+			str::parse("iso2").unwrap(),
+			str::parse("avc1").unwrap(),
+			str::parse("mp41").unwrap(),
+		],
+		timescale:target_framerate,
+	};
+	let mut mp4=mp4::Mp4Writer::write_start(output_file,&mp4_config)
+		.map_err(EncodeError::OutputMp4Start)?;
+
+	let avc_config=mp4::AvcConfig{
+		width:params.width.get() as u16,
+		height:params.height.get() as u16,
+		// make up some data to prevent this underdeveloped library from crashing
+		seq_param_set:vec![0,0,0,0],
+		pic_param_set:vec![],
+	};
+	let track_config=mp4::TrackConfig{
+		track_type:mp4::TrackType::Video,
+		timescale:target_framerate,
+		language:"eng".to_owned(),
+		media_conf:mp4::MediaConfig::AvcConfig(avc_config),
+	};
+
+	const TRACK_ID:u32=1;
+	mp4.add_track(&track_config)
+		.map_err(EncodeError::OutputMp4AddTrack)?;
+
+	let duration = bot.duration();
+	for i in 0..duration.get()*target_framerate as i64/SessionTime::ONE_SECOND.get() {
+		let time=SessionTime::raw(i*SessionTime::ONE_SECOND.get()/target_framerate as i64);
+		playback_head.advance_time(&bot,time);
+		let (pos,angles)=playback_head.get_position_angles(&bot,time);
+		wgpu_state.render(pos,angles);
+
+		let frame=vk_video::Frame{
+			data:wgpu_state.video_texture.clone(),
+			pts:None,
+		};
+		let res=unsafe{encoder.encode(frame,false)}
+			.map_err(EncodeError::VideoEncodeFrame)?;
+
+		let mp4_sample=mp4::Mp4Sample{
+			start_time:i as u64,
+			duration:1,
+			rendering_offset:0,
+			is_sync:false,
+			bytes:res.data.into(),
+		};
+		mp4.write_sample(TRACK_ID,&mp4_sample)
+			.map_err(EncodeError::OutputMp4WriteSample)?;
+	}
+
+	mp4.write_end()
+		.map_err(EncodeError::OutputMp4End)?;
+
+	Ok(())
+}
+
+struct WgpuState {
+	device: wgpu::Device,
+	queue: wgpu::Queue,
+	// graphics output
+	graphics:strafesnet_roblox_bot_player::graphics::Graphics,
+	// not sure if this needs to stay bound to keep the TextureView valid
+	#[expect(unused)]
+	graphics_texture: wgpu::Texture,
+	graphics_texture_view: wgpu::TextureView,
+	// video output
+	video_texture: wgpu::Texture,
+	y_renderer: PlaneRenderer,
+	uv_renderer: PlaneRenderer,
+}
+
+impl WgpuState {
+	fn new(
+		device: wgpu::Device,
+		queue: wgpu::Queue,
+		size: glam::UVec2,
+	) -> WgpuState {
+		const FORMAT: wgpu::TextureFormat = wgpu::TextureFormat::Rgba8UnormSrgb;
+		let graphics = strafesnet_roblox_bot_player::graphics::Graphics::new(&device,&queue,size,FORMAT);
+
+		let shader = wgpu::include_wgsl!("../shaders/rgb_to_yuv.wgsl");
+		let shader = device.create_shader_module(shader);
+
+		let graphics_texture_bind_group_layout=device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor{
+			label:Some("RGB Bind Group Layout"),
+			entries:&[
+				wgpu::BindGroupLayoutEntry{
+					binding:0,
+					visibility:wgpu::ShaderStages::FRAGMENT,
+					ty:wgpu::BindingType::Texture{
+						sample_type:wgpu::TextureSampleType::Float{filterable:true},
+						multisampled:false,
+						view_dimension:wgpu::TextureViewDimension::D2,
+					},
+					count:None,
+				},
+				wgpu::BindGroupLayoutEntry{
+					binding:1,
+					visibility:wgpu::ShaderStages::FRAGMENT,
+					ty:wgpu::BindingType::Sampler(wgpu::SamplerBindingType::Filtering),
+					count:None,
+				},
+			],
+		});
+
+		let graphics_texture=device.create_texture(&wgpu::TextureDescriptor{
+			label:Some("RGB texture"),
+			format:FORMAT,
+			size:wgpu::Extent3d{
+				width:size.x,
+				height:size.y,
+				depth_or_array_layers:1,
+			},
+			mip_level_count:1,
+			sample_count:1,
+			dimension:wgpu::TextureDimension::D2,
+			usage:wgpu::TextureUsages::RENDER_ATTACHMENT|wgpu::TextureUsages::TEXTURE_BINDING,
+			view_formats:&[],
+		});
+		let graphics_texture_view = graphics_texture.create_view(&wgpu::TextureViewDescriptor {
+			label: Some("RGB texture view"),
+			aspect: wgpu::TextureAspect::All,
+			usage: Some(wgpu::TextureUsages::RENDER_ATTACHMENT|wgpu::TextureUsages::TEXTURE_BINDING),
+			..Default::default()
+		});
+		let clamp_sampler=device.create_sampler(&wgpu::SamplerDescriptor{
+			label:Some("Clamp Sampler"),
+			address_mode_u:wgpu::AddressMode::ClampToEdge,
+			address_mode_v:wgpu::AddressMode::ClampToEdge,
+			address_mode_w:wgpu::AddressMode::ClampToEdge,
+			mag_filter:wgpu::FilterMode::Linear,
+			min_filter:wgpu::FilterMode::Linear,
+			mipmap_filter:wgpu::MipmapFilterMode::Linear,
+			..Default::default()
+		});
+		let graphics_texture_bind_group=device.create_bind_group(&wgpu::BindGroupDescriptor{
+			layout:&graphics_texture_bind_group_layout,
+			entries:&[
+				wgpu::BindGroupEntry{
+					binding:0,
+					resource:wgpu::BindingResource::TextureView(&graphics_texture_view),
+				},
+				wgpu::BindGroupEntry{
+					binding:1,
+					resource:wgpu::BindingResource::Sampler(&clamp_sampler),
+				},
+			],
+			label:Some("Graphics Texture"),
+		});
+
+		let pipeline_layout = device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
+			label: Some("wgpu pipeline layout"),
+			bind_group_layouts: &[
+				&graphics_texture_bind_group_layout
+			],
+			immediate_size: 0,
+		});
+
+		let video_texture = device.create_texture(&wgpu::TextureDescriptor {
+			label: Some("wgpu render target"),
+			format: wgpu::TextureFormat::NV12,
+			usage: wgpu::TextureUsages::RENDER_ATTACHMENT | wgpu::TextureUsages::COPY_SRC,
+			dimension: wgpu::TextureDimension::D2,
+			sample_count: 1,
+			view_formats: &[],
+			mip_level_count: 1,
+			size: wgpu::Extent3d {
+				width: size.x,
+				height: size.y,
+				depth_or_array_layers: 1,
+			},
+		});
+
+		let y_renderer = PlaneRenderer::new(
+			&device,
+			&pipeline_layout,
+			&shader,
+			"fs_main_y",
+			&video_texture,
+			wgpu::TextureAspect::Plane0,
+			graphics_texture_bind_group.clone(),
+		);
+		let uv_renderer = PlaneRenderer::new(
+			&device,
+			&pipeline_layout,
+			&shader,
+			"fs_main_uv",
+			&video_texture,
+			wgpu::TextureAspect::Plane1,
+			graphics_texture_bind_group,
+		);
+
+		WgpuState {
+			device,
+			queue,
+			graphics,
+			graphics_texture,
+			graphics_texture_view,
+			video_texture,
+			y_renderer,
+			uv_renderer,
+		}
+	}
+
+	fn change_map(&mut self,map:&strafesnet_common::map::CompleteMap){
+		self.graphics.change_map(&self.device,&self.queue,map);
+	}
+
+	fn render(&mut self,pos:glam::Vec3,angles:glam::Vec2) {
+		let mut encoder = self
+			.device
+			.create_command_encoder(&wgpu::CommandEncoderDescriptor {
+				label: Some("wgpu encoder"),
+			});
+
+		self.graphics.encode_commands(&mut encoder,&self.graphics_texture_view,pos,angles);
+
+		self.y_renderer.render(&mut encoder);
+		self.uv_renderer.render(&mut encoder);
+
+		encoder.transition_resources(
+			[].into_iter(),
+			[wgpu::TextureTransition {
+				texture: &self.video_texture,
+				state: wgpu::TextureUses::COPY_SRC,
+				selector: None,
+			}]
+			.into_iter(),
+		);
+
+		let buffer = encoder.finish();
+
+		self.queue.submit([buffer]);
+	}
+}
+
+struct PlaneRenderer {
+	graphics_texture_bind_group: wgpu::BindGroup,
+	pipeline: wgpu::RenderPipeline,
+	plane: wgpu::TextureAspect,
+	plane_view: wgpu::TextureView,
+}
+
+impl PlaneRenderer {
+	fn new(
+		device: &wgpu::Device,
+		pipeline_layout: &wgpu::PipelineLayout,
+		shader: &wgpu::ShaderModule,
+		fragment_entry_point: &str,
+		texture: &wgpu::Texture,
+		plane: wgpu::TextureAspect,
+		graphics_texture_bind_group: wgpu::BindGroup,
+	) -> Self {
+		let format = texture.format().aspect_specific_format(plane).unwrap();
+		let pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
+			label: Some("wgpu pipeline"),
+			layout: Some(pipeline_layout),
+			cache: None,
+			vertex: wgpu::VertexState {
+				module: shader,
+				buffers: &[],
+				entry_point: None,
+				compilation_options: Default::default(),
+			},
+			fragment: Some(wgpu::FragmentState {
+				module: shader,
+				entry_point: Some(fragment_entry_point),
+				compilation_options: Default::default(),
+				targets: &[Some(wgpu::ColorTargetState {
+					blend: None,
+					format,
+					write_mask: wgpu::ColorWrites::ALL,
+				})],
+			}),
+			primitive: wgpu::PrimitiveState {
+				topology: wgpu::PrimitiveTopology::TriangleList,
+				cull_mode: Some(wgpu::Face::Back),
+				polygon_mode: wgpu::PolygonMode::Fill,
+				front_face: wgpu::FrontFace::Cw,
+				conservative: false,
+				unclipped_depth: false,
+				strip_index_format: None,
+			},
+			multiview_mask: None,
+			multisample: wgpu::MultisampleState {
+				count: 1,
+				mask: !0,
+				alpha_to_coverage_enabled: false,
+			},
+			depth_stencil: None,
+		});
+
+		let plane_view = texture.create_view(&wgpu::TextureViewDescriptor {
+			label: Some("wgpu render target plane view"),
+			aspect: plane,
+			usage: Some(wgpu::TextureUsages::RENDER_ATTACHMENT),
+			..Default::default()
+		});
+
+		Self {
+			graphics_texture_bind_group,
+			pipeline,
+			plane,
+			plane_view,
+		}
+	}
+
+	fn render(&self, encoder: &mut wgpu::CommandEncoder) {
+		let clear_color = match self.plane {
+			wgpu::TextureAspect::Plane0 => wgpu::Color::BLACK,
+			wgpu::TextureAspect::Plane1 => wgpu::Color {
+				r: 0.5,
+				g: 0.5,
+				b: 0.0,
+				a: 1.0,
+			},
+			_ => unreachable!(),
+		};
+
+		let mut render_pass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
+			label: Some("wgpu render pass"),
+			timestamp_writes: None,
+			occlusion_query_set: None,
+			depth_stencil_attachment: None,
+			color_attachments: &[Some(wgpu::RenderPassColorAttachment {
+				view: &self.plane_view,
+				ops: wgpu::Operations {
+					load: wgpu::LoadOp::Clear(clear_color),
+					store: wgpu::StoreOp::Store,
+				},
+				resolve_target: None,
+				depth_slice: None,
+			})],
+			multiview_mask: None,
+		});
+
+		render_pass.set_bind_group(0,&self.graphics_texture_bind_group,&[]);
+		render_pass.set_pipeline(&self.pipeline);
+		render_pass.draw(0..3, 0..1);
+	}
+}

video-encoder/src/main.rs

@@ -0,0 +1,24 @@
+use clap::{Parser,Subcommand};
+
+mod encode;
+
+#[derive(Parser)]
+#[command(author,version,about,long_about=None)]
+#[command(propagate_version=true)]
+struct Cli{
+	#[command(subcommand)]
+	command:Commands,
+}
+
+#[derive(Subcommand)]
+enum Commands{
+	#[command(flatten)]
+	Encode(encode::Commands),
+}
+
+fn main(){
+	let cli=Cli::parse();
+	match cli.command{
+		Commands::Encode(commands)=>commands.run(),
+	}
+}

wasm-module/Cargo.toml

@@ -3,10 +3,24 @@ name = "strafesnet_roblox_bot_player_wasm_module"
 version = "0.1.0"
 edition = "2024"
 
+[lib]
+crate-type = ["cdylib"]
+
+[features]
+default = []
+webgl = ["wgpu/webgl"]
+
 [dependencies]
-strafesnet_roblox_bot_player = { version = "0.1.0", path = "../lib" }
-wasm-bindgen = "0.2.108"
+glam.workspace = true
+wgpu.workspace = true
+strafesnet_roblox_bot_player.workspace = true
 strafesnet_common.workspace = true
 strafesnet_graphics.workspace = true
 strafesnet_roblox_bot_file.workspace = true
 strafesnet_snf.workspace = true
+wasm-bindgen = "0.2.108"
+wasm-bindgen-futures = "0.4.58"
+web-sys = { version = "0.3.85", features = ["HtmlCanvasElement"] }
+
+[package.metadata.wasm-pack.profile.release]
+wasm-opt = ["-Oz", "--enable-bulk-memory","--enable-nontrapping-float-to-int"]

wasm-module/src/lib.rs

@@ -0,0 +1,235 @@
+use wasm_bindgen::prelude::wasm_bindgen;
+use wasm_bindgen::JsError;
+use strafesnet_roblox_bot_file::v0;
+use strafesnet_roblox_bot_player::{bot,bvh,head,time,graphics};
+use strafesnet_graphics::{setup,surface};
+
+// Hack to keep the code compiling,
+// SurfaceTarget::Canvas is not available in IDE for whatever reason.
+struct ToSurfaceTarget(web_sys::HtmlCanvasElement);
+impl From<ToSurfaceTarget> for wgpu::SurfaceTarget<'static>{
+	fn from(ToSurfaceTarget(canvas):ToSurfaceTarget)->Self{
+		#[cfg(target_arch = "wasm32")]
+		let target=wgpu::SurfaceTarget::Canvas(canvas);
+		#[expect(unused)]
+		#[cfg(not(target_arch = "wasm32"))]
+		let target=panic!("{canvas:?}");
+		#[allow(unused)]
+		target
+	}
+}
+
+#[wasm_bindgen]
+pub struct Graphics{
+	graphics:graphics::Graphics,
+	surface:surface::Surface<'static>,
+	device:wgpu::Device,
+	queue:wgpu::Queue,
+}
+#[wasm_bindgen]
+pub async fn setup_graphics(canvas:web_sys::HtmlCanvasElement)->Result<Graphics,JsError>{
+	let size=glam::uvec2(canvas.width(),canvas.height());
+
+	let instance_desc=wgpu::InstanceDescriptor::from_env_or_default();
+	let instance=wgpu::util::new_instance_with_webgpu_detection(&instance_desc).await;
+	let surface=setup::step2::create_surface(&instance,ToSurfaceTarget(canvas)).map_err(|e|JsError::new(&e.to_string()))?;
+	let adapter=instance.request_adapter(&wgpu::RequestAdapterOptions{
+		power_preference:wgpu::PowerPreference::HighPerformance,
+		force_fallback_adapter:false,
+		compatible_surface:Some(&surface),
+	}).await.map_err(|e|JsError::new(&e.to_string()))?;
+	let (device,queue)=setup::step4::request_device(&adapter).await.map_err(|e|JsError::new(&e.to_string()))?;
+	let surface=setup::step5::configure_surface(&adapter,&device,surface,(size.x,size.y)).map_err(|e|JsError::new(&e.to_string()))?;
+	Ok(Graphics{
+		graphics:graphics::Graphics::new(&device,&queue,size,surface.view_format()),
+		surface,
+		device,
+		queue,
+	})
+}
+#[wasm_bindgen]
+impl Graphics{
+	#[wasm_bindgen]
+	pub fn render(&mut self,bot:&CompleteBot,head:&PlaybackHead,time:f64){
+		let time=time::from_float(time).unwrap();
+		let (pos,angles)=head.head.get_position_angles(&bot.bot,time);
+		let frame=self.surface.new_frame(&self.device);
+		let mut encoder=self.device.create_command_encoder(&wgpu::CommandEncoderDescriptor{label:None});
+		self.graphics.encode_commands(&mut encoder,frame.view(),pos,angles);
+		self.queue.submit([encoder.finish()]);
+		frame.present();
+	}
+	#[wasm_bindgen]
+	pub fn resize(&mut self,width:u32,height:u32,fov_slope_x:f32,fov_slope_y:f32){
+		let size=[width,height].into();
+		self.surface.configure(&self.device,size);
+		self.graphics.resize(&self.device,size,[fov_slope_x as f32,fov_slope_y as f32].into());
+	}
+	#[wasm_bindgen]
+	pub fn change_map(&mut self,map:&CompleteMap){
+		self.graphics.change_map(&self.device,&self.queue,&map.map);
+	}
+}
+
+#[wasm_bindgen]
+pub struct CompleteBot{
+	bot:bot::CompleteBot,
+}
+#[wasm_bindgen]
+impl CompleteBot{
+	#[wasm_bindgen(constructor)]
+	pub fn new(data:&[u8])->Result<Self,JsError>{
+		let timelines=v0::read_all_to_block(std::io::Cursor::new(data)).map_err(|e|JsError::new(&e.to_string()))?;
+		Ok(Self{
+			bot:bot::CompleteBot::new(timelines),
+		})
+	}
+	#[wasm_bindgen]
+	pub fn duration(&self)->f64{
+		self.bot.duration().into()
+	}
+	#[wasm_bindgen]
+	pub fn run_duration(&self,mode_id:u32)->Option<f64>{
+		let mode=v0::ModeID(mode_id);
+		Some(self.bot.run_duration(mode)?.into())
+	}
+}
+
+#[wasm_bindgen]
+pub struct CompleteMap{
+	map:strafesnet_common::map::CompleteMap,
+}
+#[wasm_bindgen]
+impl CompleteMap{
+	#[wasm_bindgen(constructor)]
+	pub fn new(data:&[u8])->Result<Self,JsError>{
+		let map=strafesnet_snf::read_map(std::io::Cursor::new(data))
+			.map_err(|e|JsError::new(&e.to_string()))?
+			.into_complete_map()
+			.map_err(|e|JsError::new(&e.to_string()))?;
+		Ok(Self{
+			map,
+		})
+	}
+}
+
+#[wasm_bindgen]
+pub struct PlaybackHead{
+	head:head::PlaybackHead,
+}
+#[wasm_bindgen]
+impl PlaybackHead{
+	#[wasm_bindgen(constructor)]
+	pub fn new(bot:&CompleteBot,time:f64)->Self{
+		let time=time::from_float(time).unwrap();
+		Self{
+			head:head::PlaybackHead::new(&bot.bot,time),
+		}
+	}
+	#[wasm_bindgen]
+	pub fn advance_time(&mut self,bot:&CompleteBot,time:f64){
+		let time=time::from_float(time).unwrap();
+		self.head.advance_time(&bot.bot,time);
+	}
+	#[wasm_bindgen]
+	pub fn set_paused(&mut self,time:f64,paused:bool){
+		let time=time::from_float(time).unwrap();
+		self.head.set_paused(time,paused);
+	}
+	#[wasm_bindgen]
+	pub fn get_scale(&mut self)->f64{
+		let scale=self.head.get_scale();
+		scale.num() as f64/scale.den() as f64
+	}
+	#[wasm_bindgen]
+	pub fn set_scale(&mut self,time:f64,scale:f64){
+		let time=time::from_float(time).unwrap();
+		self.head.set_scale(time,scale.try_into().unwrap());
+	}
+	#[wasm_bindgen]
+	pub fn get_head_time(&self,time:f64)->f64{
+		let time=time::from_float(time).unwrap();
+		let time=self.head.time(time);
+		time.into()
+	}
+	/// Set the playback head position to new_time.
+	#[wasm_bindgen]
+	pub fn set_head_time(&mut self,bot:&CompleteBot,time:f64,new_time:f64){
+		let time=time::from_float(time).unwrap();
+		let new_time=time::from_float(new_time).unwrap();
+		self.head.set_time(&bot.bot,time,new_time);
+	}
+	#[wasm_bindgen]
+	pub fn get_run_time(&self,bot:&CompleteBot,time:f64,mode_id:u32)->Option<f64>{
+		let time=time::from_float(time).unwrap();
+		let time=bot.bot.time(self.head.time(time));
+		let mode=v0::ModeID(mode_id);
+		let run_time=self.head.state().get_run(mode)?.time(time);
+		Some(run_time.into())
+	}
+	#[wasm_bindgen]
+	pub fn is_run_in_progress(&self,mode_id:u32)->Option<bool>{
+		let mode=v0::ModeID(mode_id);
+		Some(self.head.state().get_run(mode)?.is_in_progress())
+	}
+	#[wasm_bindgen]
+	pub fn is_run_finished(&self,mode_id:u32)->Option<bool>{
+		let mode=v0::ModeID(mode_id);
+		Some(self.head.state().get_run(mode)?.is_finished())
+	}
+	#[wasm_bindgen]
+	pub fn get_fov_slope_y(&self)->f64{
+		self.head.state().get_fov_y()
+	}
+	#[wasm_bindgen]
+	pub fn get_speed(&self,bot:&CompleteBot,time:f64)->f32{
+		let time=time::from_float(time).unwrap();
+		let velocity=self.head.get_velocity(&bot.bot,time);
+
+		use glam::Vec3Swizzles;
+		velocity.xz().length()
+	}
+	#[wasm_bindgen]
+	pub fn get_game_controls(&self)->u32{
+		self.head.state().get_controls().bits()
+	}
+	#[wasm_bindgen]
+	pub fn get_position(&self,bot:&CompleteBot,time:f64)->Vector3{
+		let time=time::from_float(time).unwrap();
+		let position=self.head.get_position(&bot.bot,time);
+		Vector3(position)
+	}
+	/// Returns the camera angles yaw delta between the last game tick and the most recent game tick.
+	#[wasm_bindgen]
+	pub fn get_angles_yaw_delta(&self)->f32{
+		self.head.state().get_angles_delta().y
+	}
+}
+
+#[wasm_bindgen]
+pub struct Vector3(glam::Vec3);
+#[wasm_bindgen]
+impl Vector3{
+	#[wasm_bindgen]
+	pub fn to_array(&self)->Vec<f32>{
+		self.0.to_array().to_vec()
+	}
+}
+
+#[wasm_bindgen]
+pub struct Bvh{
+	bvh:bvh::Bvh,
+}
+#[wasm_bindgen]
+impl Bvh{
+	#[wasm_bindgen(constructor)]
+	pub fn new(bot:&CompleteBot)->Self{
+		Self{
+			bvh:bvh::Bvh::new(&bot.bot),
+		}
+	}
+	#[wasm_bindgen]
+	pub fn closest_time_to_point(&self,bot:&CompleteBot,point:&Vector3)->Option<f64>{
+		Some(bot.bot.playback_time(self.bvh.closest_time_to_point(&bot.bot,point.0)?).into())
+	}
+}

web-demo/.gitattributes

@@ -0,0 +1,2 @@
+bhop_marble_7cf33a64-7120-4514-b9fa-4fe29d9523d.qbot filter=lfs diff=lfs merge=lfs -text
+bhop_marble_5692093612.snfm filter=lfs diff=lfs merge=lfs -text

web-demo/iframe-helper.js

@@ -0,0 +1,13 @@
+if (window.frameElement) {
+	const body = document.body;
+	const observer = new ResizeObserver(() => {
+		window.parent.postMessage({
+			cmd: "resize",
+			data: {
+				width: body.scrollWidth,
+				height: body.scrollHeight,
+			},
+		});
+	});
+	observer.observe(body);
+}

web-demo/index.html

@@ -0,0 +1,74 @@
+<!doctype html>
+<html lang="en">
+	<head>
+		<meta charset="utf-8" />
+		<meta
+			name="viewport"
+			content="width=device-width, initial-scale=1, shrink-to-fit=no"
+		/>
+		<title>StrafesNET Roblox Bot Player Demo</title>
+		<style>
+			:root {
+				color-scheme: light dark;
+			}
+			html,
+			body {
+				margin: 0px;
+				width: 100%;
+				height: 100%;
+				overflow: hidden;
+			}
+			canvas {
+				margin: 0;
+				width: 100%;
+				height: 100%;
+			}
+			.hud {
+				position: fixed;
+				bottom: 10px;
+				left: 10px;
+				display: flex;
+				flex-direction: column; /* stack vertically */
+				gap: 4px; /* space between timers */
+			}
+
+			.timer {
+				background: #000;
+				color: #fff;
+				padding: 4px 8px;
+				font-family: sans-serif;
+				font-size: 14px;
+				border-radius: 3px;
+			}
+
+			.controls {
+				position: fixed;
+				bottom: 10px;
+				left: 120px;
+				display: flex;
+				flex-direction: row; /* stack horizontally */
+				gap: 4px; /* space between timers */
+			}
+		</style>
+		<script defer src="player.js" type="module"></script>
+		<script defer type="module" src="iframe-helper.js"></script>
+	</head>
+	<body>
+		<canvas id="viewport"> </canvas>
+		<div class="hud">
+			<div id="hud_duration" class="timer">00:00:00</div>
+			<div id="hud_timer" class="timer">00:00:00</div>
+			<div id="diff_velocity" class="timer">-0.000 u/s</div>
+			<div id="diff_time" class="timer">-0.000s</div>
+		</div>
+		<div class="controls">
+			<button id="control_reset">↪️</button>
+			<button id="control_pause">⏯</button>
+			<button id="control_backward">⬅️</button>
+			<button id="control_forward">➡️</button>
+			<button id="control_slower">⏪</button>
+			<input type="text" id="control_speed" value="1.00x"></>
+			<button id="control_faster">⏩</button>
+		</div>
+	</body>
+</html>

web-demo/player.js

@@ -0,0 +1,148 @@
+import init, {
+	setup_graphics,
+	CompleteBot,
+	CompleteMap,
+	PlaybackHead,
+	Bvh,
+} from "./pkg/strafesnet_roblox_bot_player_wasm_module.js";
+
+// Loading
+await init(); // load the wasm module
+
+const b = await fetch("bhop_marble_7cf33a64-7120-4514-b9fa-4fe29d9523d.qbot");
+const m = await fetch("bhop_marble_5692093612.snfm");
+
+const canvas = document.getElementById("viewport");
+
+const graphics = await setup_graphics(canvas);
+const bot = new CompleteBot(new Uint8Array(await b.arrayBuffer()));
+const map = new CompleteMap(new Uint8Array(await m.arrayBuffer()));
+const playback = new PlaybackHead(bot, 0);
+const bvh_wr = new Bvh(bot);
+const playback_wr = new PlaybackHead(bot, 0);
+
+graphics.change_map(map);
+
+// HUD
+const hud_timer = document.getElementById("hud_timer");
+const hud_duration = document.getElementById("hud_duration");
+const diff_velocity = document.getElementById("diff_velocity");
+const diff_time = document.getElementById("diff_time");
+const MODE_MAIN = 0;
+
+function timer_text(t) {
+	const h = Math.floor(t / 3600);
+	const m = Math.floor((t % 3600) / 60);
+	const s = Math.floor(t % 60);
+	const ms = Math.floor((t % 1) * 1000);
+	return `${String(h).padStart(2, "0")}:${String(m).padStart(2, "0")}:${String(s).padStart(2, "0")}.${String(ms).padStart(3, "0")}`;
+}
+
+hud_duration.textContent = timer_text(bot.run_duration(MODE_MAIN));
+
+// Stuff
+const startTime = document.timeline.currentTime;
+function elapsed() {
+	return (document.timeline.currentTime - startTime) / 1000;
+}
+
+const control_speed = document.getElementById("control_speed");
+
+var paused = false;
+var scale = 1;
+function set_scale(new_scale) {
+	scale = new_scale;
+	playback.set_scale(elapsed(), scale);
+	control_speed.value = `${scale.toPrecision(3)}x`;
+}
+
+const SEEK_DURATION = 1.0;
+
+// Controls
+document.getElementById("control_reset").addEventListener("click", (e) => {
+	playback.set_head_time(bot, elapsed(), 0.0);
+});
+document.getElementById("control_pause").addEventListener("click", (e) => {
+	paused = !paused;
+	playback.set_paused(elapsed(), paused);
+});
+document.getElementById("control_forward").addEventListener("click", (e) => {
+	const time_now = elapsed();
+	const playback_time = playback.get_head_time(time_now);
+	const time_offset = playback.get_scale() * SEEK_DURATION;
+	playback.set_head_time(bot, time_now, playback_time + time_offset);
+});
+document.getElementById("control_backward").addEventListener("click", (e) => {
+	const time_now = elapsed();
+	const playback_time = playback.get_head_time(time_now);
+	const time_offset = playback.get_scale() * SEEK_DURATION;
+	playback.set_head_time(bot, time_now, playback_time - time_offset);
+});
+document.getElementById("control_slower").addEventListener("click", (e) => {
+	set_scale((scale * 4) / 5);
+});
+const regex = new RegExp("^([^x]*)x?$");
+control_speed.addEventListener("change", (e) => {
+	const parsed = regex.exec(e.target.value);
+	if (!parsed) {
+		set_scale(1);
+		return;
+	}
+	const input = Number(parsed.at(1));
+	if (Number.isNaN(input)) {
+		set_scale(1);
+		return;
+	}
+	set_scale(input);
+});
+document.getElementById("control_faster").addEventListener("click", (e) => {
+	set_scale((scale * 5) / 4);
+});
+
+// Rendering
+function animate(now) {
+	const elapsedMs = now - startTime;
+	const elapsedSec = elapsedMs / 1000; // wasm expects seconds
+
+	// Advance the playback head to the current time
+	playback.advance_time(bot, elapsedSec);
+
+	// update the timer text
+	const time = playback.get_run_time(bot, elapsedSec, MODE_MAIN);
+	hud_timer.textContent = timer_text(time);
+
+	// show diff
+	const pos = playback.get_position(bot, elapsedSec);
+	const wr_playback_time = bvh_wr.closest_time_to_point(bot, pos);
+	playback_wr.set_head_time(bot, elapsedSec, wr_playback_time);
+	const wr_time = playback_wr.get_run_time(bot, elapsedSec, MODE_MAIN);
+	const run_speed = playback.get_speed(bot, elapsedSec);
+	const wr_speed = playback_wr.get_speed(bot, elapsedSec);
+	const v_diff = run_speed - wr_speed;
+	const wholespeed = Math.floor(Math.abs(v_diff));
+	const millispeed = Math.floor((Math.abs(v_diff) % 1) * 1000);
+	diff_velocity.textContent = `${v_diff<0?"-":"+"}${String(wholespeed)}.${String(millispeed).padStart(3, "0")} u/s`;
+	const t_diff = time - wr_time;
+	const s = Math.floor(Math.abs(t_diff));
+	const ms = Math.floor((Math.abs(t_diff) % 1) * 1000);
+	diff_time.textContent = `${t_diff<0?"-":"+"}${String(s)}.${String(ms).padStart(3, "0")}s`;
+
+	// Render the frame that the bot is at that time
+	graphics.render(bot, playback, elapsedSec);
+
+	// Keep the loop going
+	requestAnimationFrame(animate);
+}
+
+requestAnimationFrame(animate);
+
+// Resizing
+function resize() {
+	canvas.width = canvas.clientWidth;
+	canvas.height = canvas.clientHeight;
+	const fov_y = playback.get_fov_slope_y();
+	const fov_x = (fov_y * canvas.width) / canvas.height;
+	graphics.resize(canvas.width, canvas.height, fov_x, fov_y);
+}
+window.addEventListener("resize", resize);
+resize();