adjust playback speed with arrow keys

lib/src/head.rs

@@ -64,6 +64,9 @@ impl PlaybackHead{
 		state.set_offset(offset);
 		self.timer=Timer::from_state(state,paused);
 	}
+	pub fn set_scale(&mut self,time:SessionTime,new_scale:strafesnet_common::integer::Ratio64){
+		self.timer.set_scale(time,new_scale);
+	}
 	pub fn advance_time(&mut self,bot:&CompleteBot,time:SessionTime){
 		let mut simulation_time=self.time(bot,time);
 		let mut time_float=simulation_time.get() as f64/PhysicsTime::ONE_SECOND.get() as f64;

native-player/Cargo.toml

@@ -4,8 +4,9 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
-pollster = "0.4.0"
+ratio_from_float = { version = "0.1.0", path = "../ratio_from_float" }
 strafesnet_roblox_bot_player = { version = "0.1.0", path = "../lib" }
+pollster = "0.4.0"
 wgpu = "28.0.0"
 winit = "0.30.12"
 strafesnet_common.workspace = true

native-player/src/player.rs

@@ -23,6 +23,7 @@ pub struct PlayerWorker<'a>{
 	graphics_thread:Graphics,
 	bot:Option<CompleteBot>,
 	playback_head:PlaybackHead,
+	playback_speed:i8,
 }
 impl<'a> PlayerWorker<'a>{
 	pub fn new(
@@ -35,6 +36,7 @@ impl<'a> PlayerWorker<'a>{
 			graphics_thread,
 			bot:None,
 			playback_head,
+			playback_speed:0,
 		}
 	}
 	pub fn send(&mut self,ins:TimedInstruction<Instruction,SessionTime>){
@@ -48,7 +50,16 @@ impl<'a> PlayerWorker<'a>{
 			Instruction::SessionControl(SessionControlInstruction::SkipBack)=>{
 				self.playback_head.seek_backward(SessionTime::from_secs(5));
 			},
-			Instruction::SessionControl(session_control_instruction)=>{},
+			Instruction::SessionControl(SessionControlInstruction::DecreaseTimescale)=>{
+				self.playback_speed=self.playback_speed.saturating_sub(1).max(-48);
+				let speed=2.0f64.powf(self.playback_speed as f64/3.0);
+				self.playback_head.set_scale(ins.time,ratio_from_float::ratio_from_f64(speed).unwrap());
+			},
+			Instruction::SessionControl(SessionControlInstruction::IncreaseTimescale)=>{
+				self.playback_speed=self.playback_speed.saturating_add(1).min(48);
+				let speed=2.0f64.powf(self.playback_speed as f64/3.0);
+				self.playback_head.set_scale(ins.time,ratio_from_float::ratio_from_f64(speed).unwrap());
+			},
 			Instruction::Render=>if let Some(bot)=&self.bot{
 				self.playback_head.advance_time(bot,ins.time);
 				let (pos,angles)=self.playback_head.get_position_angles(bot,ins.time);

wasm-module/Cargo.toml

@@ -7,6 +7,7 @@ edition = "2024"
 crate-type = ["cdylib"]
 
 [dependencies]
+ratio_from_float = { version = "0.1.0", path = "../ratio_from_float" }
 strafesnet_roblox_bot_player = { version = "0.1.0", path = "../lib" }
 strafesnet_common.workspace = true
 strafesnet_graphics.workspace = true