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[github-actions]

Bundle size comparison (import * as ... in PR vs import * as ... in target):

🟢 Decreased	➖ Unchanged	🔴 Increased	❔ Unknown
0	355	0	0

No notable changes.

If you wish to run a comparison for other, slower bundlers, run the 'Tree-shake test' from the GitHub Actions menu.

[Copilot]

🟡 Changes recommended

Touch handoff breaks pinch zoom, and drag cleanup leaves canvas event handlers active.

2 open issues

• Preserve primary touch capture during pinch handoff · New
• Remove canvas listeners during helper cleanup · New

What changed in this PR

Adds an interactive cloth simulation to the documentation examples, demonstrating how @typegpu/geometry meshes can be animated directly on the GPU.

Changes:

• Adds cloth picking, spring-force simulation, and normal updates.
• Integrates rendering, dragging, camera controls, and simulation settings.
• Adds example metadata, interaction instructions, and a shader-resolution test.

File	Description
apps/​typegpu-docs/​tests/​individual-example-tests/​cloth-mesh.test.ts	Tests shader resolution for picking, simulation, and rendering.
apps/​typegpu-docs/​src/​examples/​simulation/​cloth-mesh/​meta.json	Registers the simulation in the example gallery.
apps/​typegpu-docs/​src/​examples/​simulation/​cloth-mesh/​index.ts	Connects GPU pipelines, rendering, camera, and controls.
apps/​typegpu-docs/​src/​examples/​simulation/​cloth-mesh/​index.html	Provides the canvas and interaction instructions.
apps/​typegpu-docs/​src/​examples/​simulation/​cloth-mesh/​drag.ts	Implements pointer-based cloth dragging.
apps/​typegpu-docs/​src/​examples/​simulation/​cloth-mesh/​cloth.ts	Defines mesh data and cloth compute shaders.

_{Review effort: Balanced}

[pullfrog]

Important

Two interaction issues remain in the drag helper: pinch-to-zoom is broken once a second touch lands, and cleanup() leaves its canvas listeners attached.

Reviewed changes

• Interactive cloth example — adds cloth-mesh with a baked @typegpu/geometry sheet, GPU spring simulation, screen-space grab picking, and normal recomputation (cloth.ts).
• Pointer dragging — drag.ts maps pointer events to NDC, captures the pointer, and hands multi-touch off to the orbit camera.
• Wiring & controls — index.ts builds the render/compute pipelines, patches the scene uniform, and exposes Wind/Stiffness/Pause/Reset.
• Docs metadata & UI — meta.json, the index.html controls help, and a thumbnail register the example in the gallery.
• Test — a jsdom smoke test drives a frame and a pointerdown, asserting 8 shader modules and the atomicMin pick shader.

  ^{｜ Fix all ➔ ｜ Fix 👍s ➔ ｜ View workflow run ｜ Using deepseek-v4.1-flash (free via Pullfrog for OSS) ｜ 𝕏}

[pullfrog]

✅ No new issues found.

Reviewed changes

Incremental re-review of the commits pushed after the prior pullfrog review (2ad434a → 1c246a8). The branch was rebased onto an advanced docs/geometry, but the example's own files are otherwise byte-identical to the prior head (index.ts now uses the shared setupOrbitCamera from the base branch). The only net change is in drag.ts:

• Stopped releasing the primary pointer's capture on grab handoff — release() no longer calls canvas.releasePointerCapture, so when a second touch ends the cloth grab the primary pointer stays captured and the orbit camera keeps both fingers, restoring pinch zoom. The normal end path is unaffected because the browser implicitly releases capture on pointerup/pointercancel.

Verified locally: the cloth-mesh jsdom test passes and pnpm run --filter typegpu-docs test:types reports 0 errors.

  ^{｜ Fix it ➔ ｜ View workflow run ｜ Using deepseek-v4.1-flash (free via Pullfrog for OSS) ｜ 𝕏}