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Running on Zero
Running on Zero
| /* Browser-only preview of the selected saved track. No upload for preview. */ | |
| (function(root,factory){ | |
| if(typeof module==='object'&&module.exports)module.exports=factory(root); | |
| else root.TrackMap=factory(root); | |
| })(typeof window==='undefined'?this:window,function(root){ | |
| const COLOURS=['#607e96','#b89561','#b9d9ed']; | |
| const NAMES=['Asphalt','Dirt','Ice']; | |
| const VECTOR=/^Vector2i\((-?\d+),\s*(-?\d+)\)$/; | |
| function vector(value){ | |
| const match=typeof value==='string'&&VECTOR.exec(value); | |
| if(!match)throw Error('Track has invalid tile coordinates'); | |
| const x=Number(match[1]),y=Number(match[2]); | |
| if(!Number.isSafeInteger(x)||!Number.isSafeInteger(y)||Math.abs(x)>1000||Math.abs(y)>1000) | |
| throw Error('Track coordinates exceed preview bounds'); | |
| return [x,y]; | |
| } | |
| function connection(value,message='Track has an invalid piece connection'){ | |
| if(!value||typeof value!=='object'||Array.isArray(value)|| | |
| !Number.isInteger(value.side)||value.side<0||value.side>3|| | |
| !Number.isInteger(value.index)||value.index<0||value.index>2|| | |
| !Number.isInteger(value.type)||value.type<0)throw Error(message); | |
| return {side:value.side,index:value.index,type:value.type}; | |
| } | |
| function connectionPoint(value,x,y,size){ | |
| const {side,index}=connection(value); | |
| // Native Connection.position uses offsets 128,384,640 in a 768-unit tile. | |
| // Shared boundaries keep adjacent path endpoints and the saved start aligned. | |
| const offset=[128,384,640][index]/768*size; | |
| switch(side){ | |
| case 0:return [x+offset,y]; | |
| case 1:return [x+offset,y+size]; | |
| case 2:return [x,y+offset]; | |
| case 3:return [x+size,y+offset]; | |
| } | |
| } | |
| function connectionControl(own,other,point,target){ | |
| // Native TrackUtils.GetPathCurve (random_track.rs, b90b8af): each | |
| // connection's inward normal sets its cubic handle, adjusted by port type. | |
| // At the exit this is the next tile's negated entry normal, so the same | |
| // per-tile construction also preserves the curve when endpoints reverse. | |
| const [nx,ny]=[[0,1],[0,-1],[1,0],[-1,0]][own.side]; | |
| const dx=target[0]-point[0],dy=target[1]-point[1]; | |
| const angle=own.type===1?Math.PI/4:own.type===3?Math.atan2(128,384):own.type===4?Math.atan2(384,128):0; | |
| const rotation=Math.sign(nx*dy-ny*dx)*angle; | |
| const c=Math.cos(rotation),s=Math.sin(rotation); | |
| const smoothness=[0,2,100].includes(own.type)&&[1,3,4].includes(other.type)?0.2:0.5; | |
| const reach=Math.hypot(dx,dy)*smoothness; | |
| return [point[0]+(nx*c-ny*s)*reach,point[1]+(nx*s+ny*c)*reach]; | |
| } | |
| async function decode(file){ | |
| if(!file||file.size<1||file.size>1048576)throw Error('Choose a .track file under 1 MB'); | |
| if(typeof DecompressionStream!=='function')throw Error('This browser cannot preview gzip tracks'); | |
| const reader=file.stream().pipeThrough(new DecompressionStream('gzip')).getReader(); | |
| const chunks=[];let total=0; | |
| try{ | |
| while(true){ | |
| const {done,value}=await reader.read();if(done)break; | |
| total+=value.byteLength; | |
| if(total>2*1024*1024)throw Error('Track preview exceeds the 2 MB expanded limit'); | |
| chunks.push(value); | |
| } | |
| }finally{reader.releaseLock();} | |
| const bytes=new Uint8Array(total);let at=0; | |
| for(const chunk of chunks){bytes.set(chunk,at);at+=chunk.length;} | |
| return JSON.parse(new TextDecoder('utf-8',{fatal:true}).decode(bytes)); | |
| } | |
| function model(saved,atlas){ | |
| const entries=Object.entries(saved?.Tiles??{}); | |
| if(entries.length<1||entries.length>256)throw Error('Track has no previewable tiles'); | |
| const tiles=entries.map(([position,item])=>{ | |
| const [x,y]=vector(position); | |
| const id=item?.Block?.TileSetId; | |
| const block=atlas?.blocks?.[`${id?.AtlasId}:${id?.AlternativeId}`]; | |
| if(!block||![0,1,2].includes(block.surface))throw Error('Track uses a piece not in the simulator atlas'); | |
| if(!Array.isArray(block.connections)||block.connections.length!==2)throw Error('Track piece connections are unavailable'); | |
| return {x,y,surface:block.surface,connections:block.connections.map(value=>connection(value))}; | |
| }); | |
| if(new Set(tiles.map(t=>`${t.x},${t.y}`)).size!==tiles.length)throw Error('Duplicate track tile'); | |
| const start=vector(saved.StartTileCoords); | |
| const startTile=tiles.find(tile=>tile.x===start[0]&&tile.y===start[1]); | |
| if(!startTile)throw Error('Start tile is not present in this track'); | |
| const startConnection=connection({side:saved.StartTileConnection?.Side,index:saved.StartTileConnection?.Index,type:saved.StartTileConnection?.Type},'Track has an invalid or missing start connection'); | |
| if(!startTile.connections.some(item=>item.side===startConnection.side&&item.index===startConnection.index&&item.type===startConnection.type)) | |
| throw Error('Saved start connection does not match the start tile'); | |
| const minX=Math.min(...tiles.map(t=>t.x)),maxX=Math.max(...tiles.map(t=>t.x)); | |
| const minY=Math.min(...tiles.map(t=>t.y)),maxY=Math.max(...tiles.map(t=>t.y)); | |
| if(maxX-minX>30||maxY-minY>30)throw Error('Track preview is too large'); | |
| return {tiles,start,startConnection,bounds:{minX,maxX,minY,maxY}}; | |
| } | |
| function render(canvas,track){ | |
| const context=canvas.getContext('2d'); | |
| if(!context)throw Error('Canvas preview unavailable'); | |
| const w=canvas.width,h=canvas.height; | |
| context.clearRect(0,0,w,h); | |
| context.fillStyle='#0c1926';context.fillRect(0,0,w,h); | |
| const b=track.bounds,columns=b.maxX-b.minX+1,rows=b.maxY-b.minY+1; | |
| const size=Math.min(160,(w-70)/columns,(h-70)/rows); | |
| const left=(w-columns*size)/2,top=(h-rows*size)/2; | |
| for(const tile of track.tiles){ | |
| const x=left+(tile.x-b.minX)*size,y=top+(tile.y-b.minY)*size; | |
| context.fillStyle=COLOURS[tile.surface]; | |
| context.beginPath();context.roundRect(x+2,y+2,size-4,size-4,Math.max(4,size*.13));context.fill(); | |
| context.strokeStyle='#d7e8f2';context.lineWidth=Math.max(1,size*.018); | |
| context.stroke(); | |
| if(Array.isArray(tile.connections)&&tile.connections.length>=2){ | |
| const [entry,exit]=tile.connections; | |
| const a=connectionPoint(entry,x,y,size),z=connectionPoint(exit,x,y,size); | |
| const p1=connectionControl(entry,exit,a,z),p2=connectionControl(exit,entry,z,a); | |
| context.beginPath();context.moveTo(...a); | |
| context.bezierCurveTo(...p1,...p2,...z); | |
| context.strokeStyle='#f3a967';context.lineWidth=Math.max(3,size*.055); | |
| context.lineCap='round';context.stroke(); | |
| } | |
| } | |
| const startX=left+(track.start[0]-b.minX)*size,startY=top+(track.start[1]-b.minY)*size; | |
| const [sx,sy]=connectionPoint(track.startConnection,startX,startY,size); | |
| context.beginPath();context.arc(sx,sy,Math.max(6,size*.105),0,Math.PI*2); | |
| context.fillStyle='#66e5aa';context.fill();context.strokeStyle='#0c1926';context.lineWidth=3;context.stroke(); | |
| } | |
| // Vehicle illustration uses only recorded position, heading, type and active state. | |
| function drawVehicle2D(ctx,x,y,heading,vehicleType,color,scale,showOutline,active){ | |
| ctx.save(); | |
| ctx.translate(x,y); | |
| ctx.rotate(heading); | |
| ctx.scale(scale,scale); | |
| if(!active)ctx.globalAlpha=0.55; | |
| const wheelSteer=0; // Neutral artwork; steering samples are unavailable. | |
| // Draw wheels / skis | |
| ctx.fillStyle='#101820'; | |
| ctx.strokeStyle=showOutline?'#ffffff':'#2a3d52'; | |
| ctx.lineWidth=showOutline?1.2:0.7; | |
| if(vehicleType===2){ | |
| // Snowmobile twin front skis + rear track | |
| for(const wy of [-5.2,5.2]){ | |
| ctx.save();ctx.translate(8.5,wy);ctx.rotate(wheelSteer); | |
| ctx.beginPath();ctx.roundRect(-4.5,-1.3,9,2.6,1);ctx.fill();ctx.stroke(); | |
| ctx.restore(); | |
| } | |
| ctx.beginPath();ctx.roundRect(-12,-4.2,13,8.4,1.5);ctx.fill(); | |
| }else{ | |
| // Rear wheels | |
| const rwY=vehicleType===3?6.8:6.2; | |
| for(const wy of [-rwY,rwY]){ | |
| ctx.beginPath();ctx.roundRect(-10.5,wy-1.8,6.5,3.6,1);ctx.fill();ctx.stroke(); | |
| } | |
| // Steerable front wheels | |
| const fwY=vehicleType===0?6.4:6.0; | |
| for(const wy of [-fwY,fwY]){ | |
| ctx.save();ctx.translate(8.2,wy);ctx.rotate(wheelSteer); | |
| ctx.beginPath();ctx.roundRect(-3.1,-1.6,6.2,3.2,1);ctx.fill();ctx.stroke(); | |
| ctx.restore(); | |
| } | |
| } | |
| // Chassis silhouette by VehicleType | |
| ctx.fillStyle=color; | |
| ctx.strokeStyle=showOutline?'#ffffff':'#0c1926'; | |
| ctx.lineWidth=showOutline?2.1:1.1; | |
| ctx.beginPath(); | |
| if(vehicleType===0){ | |
| // Formula open-wheel: rear wing, sidepods, tapered nose, front wing | |
| ctx.moveTo(-13.5,-6.2);ctx.lineTo(-9.5,-6.2);ctx.lineTo(-9.5,-3.6); | |
| ctx.lineTo(-6.5,-5.5);ctx.lineTo(3.5,-4.8);ctx.lineTo(8.5,-2.0); | |
| ctx.lineTo(13.5,-5.8);ctx.lineTo(15.2,-5.8);ctx.lineTo(15.2,5.8); | |
| ctx.lineTo(13.5,5.8);ctx.lineTo(8.5,2.0);ctx.lineTo(3.5,4.8); | |
| ctx.lineTo(-6.5,5.5);ctx.lineTo(-9.5,3.6);ctx.lineTo(-9.5,6.2); | |
| ctx.lineTo(-13.5,6.2);ctx.closePath(); | |
| }else if(vehicleType===1){ | |
| // Rally car: wide-body hatchback | |
| ctx.roundRect(-12.5,-6.3,25,12.6,3.4); | |
| }else if(vehicleType===2){ | |
| // Snowmobile: sleek sled cowling | |
| ctx.moveTo(-11.5,-4.6);ctx.lineTo(5.5,-5.0);ctx.lineTo(13.5,0); | |
| ctx.lineTo(5.5,5.0);ctx.lineTo(-11.5,4.6);ctx.closePath(); | |
| }else{ | |
| // Truck: heavy cab + cargo bed | |
| ctx.roundRect(-14,-7.0,28,14.0,2.4); | |
| } | |
| ctx.fill();ctx.stroke(); | |
| // Cockpit / roof / bed details | |
| ctx.fillStyle='#0c1725'; | |
| if(vehicleType===0){ | |
| ctx.beginPath();ctx.ellipse(-0.5,0,4.2,2.3,0,0,Math.PI*2);ctx.fill(); | |
| // Halo bar | |
| ctx.strokeStyle='#d7e8f2';ctx.lineWidth=1.1; | |
| ctx.beginPath();ctx.moveTo(0,0);ctx.lineTo(3.4,0);ctx.stroke(); | |
| }else if(vehicleType===1){ | |
| // Windshield + roof scoop + rear spoiler | |
| ctx.beginPath();ctx.roundRect(-4.5,-4.6,10.5,9.2,2);ctx.fill(); | |
| ctx.fillStyle='#ffffff';ctx.beginPath();ctx.arc(0.5,0,1.4,0,Math.PI*2);ctx.fill(); | |
| ctx.fillStyle='#101d2c';ctx.fillRect(-12,-5.6,2.4,11.2); | |
| }else if(vehicleType===2){ | |
| ctx.beginPath();ctx.roundRect(-4,-2.8,8,5.6,1.6);ctx.fill(); | |
| }else{ | |
| // Truck bed & cab windshield | |
| ctx.fillRect(-12.2,-5.4,11,10.8); | |
| ctx.beginPath();ctx.roundRect(2,-5.2,6.5,10.4,1.5);ctx.fill(); | |
| } | |
| // The recorded active flag controls the inactive badge. | |
| if(!active){ | |
| ctx.strokeStyle='#ff6b6b';ctx.lineWidth=2.4; | |
| ctx.beginPath();ctx.moveTo(-7,-7);ctx.lineTo(7,7);ctx.moveTo(7,-7);ctx.lineTo(-7,7);ctx.stroke(); | |
| } | |
| ctx.restore(); | |
| } | |
| function hash(value,label){ | |
| if(typeof value!=='string'||!/^[a-f0-9]{64}$/i.test(value))throw Error(label+' must be a SHA-256 hash'); | |
| return value.toLowerCase(); | |
| } | |
| function validateRecording(payload,expectedTrackSha,expectedNetworkSha){ | |
| if(!payload||payload.schema!=='ald.recorded-replay'||payload.version!==1||payload.kind!=='fresh_cpu_evaluation') | |
| throw Error('This file is not a supported recorded CPU evaluation'); | |
| if(payload.physics_hz!==60||payload.control_hz!==60||payload.sample_interval_ticks!==6||payload.first_sample_tick!==1|| | |
| payload.execution_backend!=='cpu'||payload.math_profile!=='proton'||payload.collision_elimination!==false||payload.idle_elimination!==false) | |
| throw Error('Recorded evaluation conditions are unsupported'); | |
| const trackSha=hash(payload.track_sha256,'Recorded track'),networkSha=hash(payload.network_sha256,'Recorded network'); | |
| if(trackSha!==hash(expectedTrackSha,'Selected track')||networkSha!==hash(expectedNetworkSha,'Selected network')) | |
| throw Error('The recording does not match the selected track and network'); | |
| const ticks=payload.requested_ticks; | |
| if(!Number.isInteger(ticks)||ticks<1||ticks>900)throw Error('Recording must contain at most 900 physics ticks'); | |
| if(!Number.isInteger(payload.vehicle_type)||payload.vehicle_type<0||payload.vehicle_type>3)throw Error('Recorded vehicle type is invalid'); | |
| const expectedTicks=[1]; | |
| for(let tick=6;tick<=ticks;tick+=6)expectedTicks.push(tick); | |
| if(expectedTicks[expectedTicks.length-1]!==ticks)expectedTicks.push(ticks); | |
| if(!Array.isArray(payload.frames)||payload.frames.length!==expectedTicks.length) | |
| throw Error('Recording is missing its expected native samples'); | |
| const frames=payload.frames.map((frame,index)=>{ | |
| if(!frame||frame.tick!==expectedTicks[index]||typeof frame.active!=='boolean')throw Error('Recorded frame ticks or active state are invalid'); | |
| const copy={tick:frame.tick,active:frame.active}; | |
| for(const key of ['x','y','rotation','vx','vy']){ | |
| if(!Number.isFinite(frame[key])||Math.abs(frame[key])>1e9)throw Error('Recorded '+key+' is invalid'); | |
| copy[key]=frame[key]; | |
| } | |
| for(const key of ['angular_velocity','boost_energy','collision_count','update_count']){ | |
| if(frame[key]===undefined)continue; | |
| if(!Number.isFinite(frame[key])||Math.abs(frame[key])>1e9)throw Error('Recorded '+key+' is invalid'); | |
| if((key==='collision_count'||key==='update_count')&&(!Number.isInteger(frame[key])||frame[key]<0))throw Error('Recorded '+key+' is invalid'); | |
| copy[key]=frame[key]; | |
| } | |
| return copy; | |
| }); | |
| return {schema:payload.schema,version:1,kind:payload.kind,physics_hz:60,control_hz:60,sample_interval_ticks:6, | |
| first_sample_tick:1,track_sha256:trackSha,network_sha256:networkSha,vehicle_type:payload.vehicle_type, | |
| requested_ticks:ticks,execution_backend:'cpu',math_profile:'proton',collision_elimination:false,idle_elimination:false,frames}; | |
| } | |
| function sampleRecording(recording,tick){ | |
| if(!Number.isFinite(tick))throw Error('Replay tick must be finite'); | |
| const frames=recording.frames,last=frames.length-1; | |
| const at=Math.max(frames[0].tick,Math.min(frames[last].tick,tick)); | |
| let lo=0,hi=last; | |
| while(lo<hi){const mid=Math.ceil((lo+hi)/2);if(frames[mid].tick<=at)lo=mid;else hi=mid-1;} | |
| const a=frames[lo],b=frames[Math.min(last,lo+1)]; | |
| const t=b.tick===a.tick?0:(at-a.tick)/(b.tick-a.tick); | |
| const angle=Math.atan2(Math.sin(b.rotation-a.rotation),Math.cos(b.rotation-a.rotation)); | |
| // Pose interpolation is only between adjacent recorded samples. HUD values | |
| // remain the actual preceding sample, never reconstructed controls or rays. | |
| return {tick:at,x:a.x+(b.x-a.x)*t,y:a.y+(b.y-a.y)*t,rotation:a.rotation+angle*t,frame:{...a}}; | |
| } | |
| function viewport(canvas,track){ | |
| const b=track.bounds,columns=b.maxX-b.minX+1,rows=b.maxY-b.minY+1; | |
| const size=Math.min(160,(canvas.width-70)/columns,(canvas.height-70)/rows); | |
| return {size,left:(canvas.width-columns*size)/2,top:(canvas.height-rows*size)/2,minX:b.minX,minY:b.minY}; | |
| } | |
| function worldPoint(view,x,y){return [view.left+(x/768-view.minX)*view.size,view.top+(y/768-view.minY)*view.size];} | |
| function mount({document,fetch,picker}){ | |
| const canvas=document.getElementById('trackMap'),status=document.getElementById('mapStatus'),legend=document.getElementById('mapLegend'); | |
| if(!canvas||!status||!legend||!picker)return; | |
| const element=id=>document.getElementById(id); | |
| let version=0,atlasPromise=null,currentTrack=null,currentTrackSha=null,staticLayer=null; | |
| let recording=null,hasRunSummary=false,cursor=1,playing=false,animId=null,lastFrameTime=null; | |
| let playSpeed=Math.max(0.25,Math.min(4,Number(element('replay_speed')?.value)||1)); | |
| let cameraMode=element('replay_camera')?.value==='follow'?'follow':'full'; | |
| const layers={outline:true,line:true,hud:true}; | |
| const noRecording='No replay recorded. The map shows the selected track and its saved starting point.'; | |
| const summaryOnly='No replay recorded. This run contains summary measurements, not vehicle positions or control samples.'; | |
| function setText(id,text){const node=element(id);if(node&&node.textContent!==text)node.textContent=text;} | |
| function syncControls(reason){ | |
| const last=recording?.frames[recording.frames.length-1].tick; | |
| const play=element('replay_play'); | |
| if(play){play.disabled=!recording||cursor>=last;play.textContent=playing?'Pause':'Play';} | |
| for(const id of ['replay_reset','replay_scrub','replay_speed','replay_camera','replay_layer_outline','replay_layer_line','replay_layer_hud']){ | |
| const node=element(id);if(node)node.disabled=!recording; | |
| } | |
| const scrub=element('replay_scrub'); | |
| if(scrub){scrub.min='1';scrub.max=String(last??1);scrub.step='1';scrub.value=String(Math.round(cursor));} | |
| if(!recording){ | |
| setText('replay_status',reason||(hasRunSummary?summaryOnly:noRecording)); | |
| setText('replay_time_label','No recorded samples'); | |
| setText('replay_readout','Position, speed, controls and sensors are unavailable until a replay is recorded.'); | |
| }else{ | |
| const state=cursor>=last?'Finished. Use Restart to view it again.':playing?'Playing.':'Paused.'; | |
| setText('replay_status',`Fresh recorded CPU evaluation · ${recording.frames.length} samples · 60 Hz physics and controls · 10 Hz recording. ${state}`); | |
| } | |
| } | |
| function stopPlayback(){ | |
| if(animId!==null&&typeof root?.cancelAnimationFrame==='function')root.cancelAnimationFrame(animId); | |
| animId=null;playing=false;lastFrameTime=null; | |
| } | |
| function renderEmpty(){const ctx=canvas.getContext('2d');ctx.clearRect(0,0,canvas.width,canvas.height);ctx.fillStyle='#0c1926';ctx.fillRect(0,0,canvas.width,canvas.height);} | |
| function draw(){ | |
| if(!currentTrack){renderEmpty();return;} | |
| const ctx=canvas.getContext('2d'),view=viewport(canvas,currentTrack); | |
| const state=recording?sampleRecording(recording,cursor):null; | |
| const position=state?worldPoint(view,state.x,state.y):null; | |
| ctx.clearRect(0,0,canvas.width,canvas.height);ctx.fillStyle='#0c1926';ctx.fillRect(0,0,canvas.width,canvas.height); | |
| ctx.save(); | |
| if(position&&cameraMode==='follow'){ | |
| ctx.translate(canvas.width/2,canvas.height/2);ctx.scale(2,2);ctx.translate(-position[0],-position[1]); | |
| } | |
| if(staticLayer)ctx.drawImage(staticLayer,0,0);else render(canvas,currentTrack); | |
| if(recording){ | |
| if(layers.line){ | |
| ctx.beginPath(); | |
| recording.frames.forEach((frame,index)=>{const p=worldPoint(view,frame.x,frame.y);if(index===0)ctx.moveTo(...p);else ctx.lineTo(...p);}); | |
| ctx.strokeStyle='#62dfb1';ctx.lineWidth=2;ctx.lineCap='round';ctx.stroke(); | |
| } | |
| // Native rotation zero faces -Y; the vehicle illustration faces +X. | |
| drawVehicle2D(ctx,...position,state.rotation-Math.PI/2,recording.vehicle_type,'#62dfb1',Math.max(0.55,Math.min(1.1,view.size/120)),layers.outline,state.frame.active); | |
| } | |
| ctx.restore(); | |
| if(state){ | |
| const frame=state.frame,speed=Math.hypot(frame.vx,frame.vy)/15*3.6; | |
| const contacts=frame.collision_count===undefined?'unavailable':String(frame.collision_count); | |
| setText('replay_time_label',`${(cursor/60).toFixed(2)}s / ${(recording.requested_ticks/60).toFixed(2)}s · Tick ${Math.round(cursor)} · Recorded sample ${frame.tick}`); | |
| setText('replay_readout',`Recorded sample tick ${frame.tick} (${(frame.tick/60).toFixed(2)}s). Speed ${speed.toFixed(1)} km/h, derived from recorded velocity. Position (${frame.x.toFixed(2)}, ${frame.y.toFixed(2)}). Contacts ${contacts}. ${frame.active?'Active':'Inactive'} at this sample. Controls and sensors unavailable.`); | |
| if(layers.hud){ | |
| ctx.save();ctx.fillStyle='rgba(9,17,27,0.88)';ctx.beginPath();ctx.roundRect(12,12,310,80,8);ctx.fill(); | |
| ctx.fillStyle='#62dfb1';ctx.font='700 12px system-ui,sans-serif';ctx.fillText('RECORDED CPU EVALUATION',24,33); | |
| ctx.fillStyle='#e5edf5';ctx.font='600 12px ui-monospace,monospace';ctx.fillText(`Sample ${frame.tick} · ${speed.toFixed(1)} km/h from velocity`,24,55); | |
| ctx.fillStyle='#b4c5d5';ctx.font='12px system-ui,sans-serif';ctx.fillText('Controls and sensors unavailable',24,77);ctx.restore(); | |
| } | |
| } | |
| } | |
| function clearRecording(reason){ | |
| const hadRecording=recording!==null;stopPlayback();recording=null;cursor=1; | |
| if(hadRecording)draw();syncControls(reason); | |
| } | |
| function step(now){ | |
| animId=null;if(!playing||!recording)return; | |
| if(document.hidden){stopPlayback();syncControls();return;} | |
| if(lastFrameTime===null)lastFrameTime=now; | |
| const elapsed=Math.max(0,Math.min(0.1,(now-lastFrameTime)/1000));lastFrameTime=now; | |
| const last=recording.frames[recording.frames.length-1].tick; | |
| cursor=Math.min(last,cursor+elapsed*60*playSpeed); | |
| draw(); | |
| if(cursor>=last){stopPlayback();syncControls();return;} | |
| syncControls();animId=root.requestAnimationFrame(step); | |
| } | |
| function bind(){ | |
| const on=(id,event,callback)=>{const node=element(id);if(node)node.addEventListener(event,callback);}; | |
| on('replay_play','click',()=>{ | |
| if(!recording)return; | |
| if(playing){stopPlayback();syncControls();return;} | |
| if(cursor>=recording.frames[recording.frames.length-1].tick||typeof root?.requestAnimationFrame!=='function')return; | |
| playing=true;lastFrameTime=null;syncControls();animId=root.requestAnimationFrame(step); | |
| }); | |
| on('replay_reset','click',()=>{if(!recording)return;stopPlayback();cursor=recording.frames[0].tick;draw();syncControls();}); | |
| on('replay_scrub','input',()=>{ | |
| if(!recording)return;const value=Number(element('replay_scrub').value);if(!Number.isFinite(value))return; | |
| stopPlayback();cursor=Math.max(recording.frames[0].tick,Math.min(recording.frames[recording.frames.length-1].tick,value));draw();syncControls(); | |
| }); | |
| on('replay_speed','change',()=>{playSpeed=Math.max(0.25,Math.min(4,Number(element('replay_speed').value)||1));}); | |
| on('replay_camera','change',()=>{cameraMode=element('replay_camera').value==='follow'?'follow':'full';draw();}); | |
| for(const key of ['outline','line','hud']){ | |
| const id='replay_layer_'+key,node=element(id);if(node)layers[key]=node.checked; | |
| on(id,'change',()=>{layers[key]=element(id).checked;draw();}); | |
| } | |
| document.addEventListener('visibilitychange',()=>{if(document.hidden){stopPlayback();syncControls();}}); | |
| } | |
| async function refresh(){ | |
| const current=++version;clearRecording();currentTrackSha=null;currentTrack=null;staticLayer=null; | |
| const info=picker.info(); | |
| const source=info.source==='builtin'?info.display_name:element('track')?.files?.[0]?.name; | |
| if(!source){status.textContent='Select a built-in track or choose a custom .track file.';legend.textContent='';renderEmpty();return;} | |
| status.textContent='Loading '+source+'…'; | |
| try{ | |
| atlasPromise??=fetch('/assets/track-atlas.json',{cache:'no-store',credentials:'same-origin'}).then(r=>{ | |
| if(!r.ok)throw Error('Track atlas unavailable');return r.json(); | |
| }); | |
| const [file,atlas]=await Promise.all([picker.file(),atlasPromise]); | |
| if(!file||file.size<1||file.size>1048576)throw Error('Choose a .track file under 1 MB'); | |
| const hashPromise=root?.crypto?.subtle?file.arrayBuffer().then(bytes=>root.crypto.subtle.digest('SHA-256',bytes)).then(bytes=>Array.from(new Uint8Array(bytes),n=>n.toString(16).padStart(2,'0')).join('')):Promise.resolve(null); | |
| const [saved,sha]=await Promise.all([decode(file),hashPromise]); | |
| const track=model(saved,atlas); | |
| if(current!==version)return; | |
| currentTrack=track;currentTrackSha=sha; | |
| render(canvas,track); | |
| const off=document.createElement?.('canvas'); | |
| if(off?.getContext?.('2d')){off.width=canvas.width;off.height=canvas.height;render(off,track);staticLayer=off;} | |
| const counts=[0,0,0];track.tiles.forEach(tile=>counts[tile.surface]++); | |
| status.textContent=source+' · '+track.tiles.length+' pieces · green dot marks the saved starting point'; | |
| legend.textContent=NAMES.filter((_,i)=>counts[i]).map(name=>name+' '+counts[NAMES.indexOf(name)]).join(' · ')+' · Orange line follows the track centerline. Collision shapes are not shown. Vehicle positions appear only from a recorded replay.'; | |
| }catch(error){ | |
| if(current!==version)return; | |
| currentTrack=null;currentTrackSha=null;staticLayer=null;renderEmpty(); | |
| status.textContent='Map unavailable: '+error.message;legend.textContent='Training selection is unaffected.'; | |
| } | |
| } | |
| const controller={ | |
| refresh, | |
| setStagedNetwork(){clearRecording();}, | |
| setRunAnalysis(analysis,receipt){hasRunSummary=Boolean(analysis?.summary||receipt?.report);clearRecording();}, | |
| focusCandidate(){clearRecording();}, | |
| clearRecording, | |
| setRecording(payload,expectedTrackSha,expectedNetworkSha){ | |
| clearRecording(); | |
| try{ | |
| const next=validateRecording(payload,expectedTrackSha,expectedNetworkSha); | |
| if(!currentTrack||!currentTrackSha)throw Error('The selected track must finish loading and hash verification before replay'); | |
| if(next.track_sha256!==currentTrackSha)throw Error('The recording belongs to a different selected track'); | |
| recording=next;cursor=next.frames[0].tick;draw();syncControls(); | |
| return {frames:next.frames.length,first_tick:cursor,last_tick:next.frames[next.frames.length-1].tick}; | |
| }catch(error){clearRecording('Replay unavailable: '+error.message);throw error;} | |
| }, | |
| }; | |
| if(typeof root==='object'&&root)root.TrackReplay=controller; | |
| bind();syncControls();document.addEventListener('track-library-change',refresh);refresh(); | |
| return controller; | |
| } | |
| return {mount,model,decode,render,validateRecording,sampleRecording}; | |
| }); | |