andras/fleeting-garden
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Getting there

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This commit is contained in:
Andras Schmelczer 2026-05-22 07:54:38 +01:00
commit f300dbd394
43 changed files with 1213 additions and 459 deletions
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19
src/game-loop/simulation-frame.ts
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@ -46,16 +46,19 @@ export class SimulationFrameRenderer {
const commandEncoder = this.device.createCommandEncoder();
this.gpuProfiler?.beginFrame();
this.textures.copyTrailMapAToB(commandEncoder);
// Clear the deposit map up-front so agents write fresh deposits each frame
// and diffuse sees only this frame's contributions added to trailMapA.
this.textures.clearDepositMap(commandEncoder);
let wroteSourceMap = false;
if (isErasing) {
if (this.pipelines.eraserAgentPipeline.hasActiveMask()) {
const eraserMask = this.textures.eraserMask.getTextureView();
// Erase trailMapA directly — it's what agent and diffuse will read.
this.pipelines.eraserTexturePipeline.executeCombined(
commandEncoder,
eraserMask,
this.textures.sourceMapA.getTextureView(),
this.textures.trailMapB.getTextureView(),
this.textures.trailMapA.getTextureView(),
this.gpuProfiler?.timestampWrites('eraserTexture')
);
this.pipelines.eraserAgentPipeline.execute(
@ -86,19 +89,20 @@ export class SimulationFrameRenderer {
this.pipelines.agentPipeline.execute(
commandEncoder,
this.textures.trailMapA.getTextureView(),
this.textures.trailMapB.getTextureView(),
this.textures.depositMap.getTextureView(),
this.gpuProfiler?.timestampWrites('agent')
);
this.pipelines.diffusionPipeline.execute(
commandEncoder,
this.textures.trailMapB.getTextureView(),
this.textures.trailMapA.getTextureView(),
this.textures.trailMapB.getTextureView(),
this.textures.trailMapA.getSize(),
this.textures.depositMap.getTextureView(),
this.gpuProfiler?.timestampWrites('trailDiffusion')
);
const canvasTexture = this.pipelines.renderPipeline.execute(
commandEncoder,
this.textures.trailMapA.getTextureView(),
this.textures.trailMapB.getTextureView(),
this.textures.sourceMapA.getTextureView(),
useSourceMap,
this.gpuProfiler?.timestampWrites('render')
@ -111,6 +115,7 @@ export class SimulationFrameRenderer {
this.textures.sourceMapA.getTextureView(),
this.textures.sourceMapB.getTextureView(),
this.textures.sourceMapB.getSize(),
null,
this.gpuProfiler?.timestampWrites('sourceDiffusion')
);
}
@ -118,6 +123,10 @@ export class SimulationFrameRenderer {
this.device.queue.submit([commandEncoder.finish()]);
afterGpuProfileSubmit?.();
canvasReadbackRequest?.afterSubmit();
// After this frame's diffuse, trailMapB holds the fresh trail; swap so
// trailMapA is "current trail" again for the next frame and any external
// readers (e.g. export snapshot).
this.textures.swapTrailMaps();
if (useSourceMap) {
this.textures.swapSourceMaps();
this.sourceActiveFramesRemaining -= 1;