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From Three.js Game Skills
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threejs-game-directorthree.js · MITThe entry skill: sets how far to take a three.js browser game from the user's own words (a small arcade game is not a request for the…threejs-gameplay-systemsthree.js · MITHow to make a playable loop: a one-page design brief, a core-loop contract proved in code, a level plan, then small ownership folders…threejs-game-ui-designerthree.js · MITHow to design a game's HUD, menus and touch controls as game interface, not a web dashboard: hierarchy (status, objective, feedback…threejs-debug-profilerthree.js · MITHow to find why a three.js page is blank, broken or slow: reproduce first, then an ordered checklist for blank canvases (canvas size, WebGL…threejs-qa-releasethree.js · MITHow to prove a three.js game works the way a player meets it: build, open in a real browser, check console errors and non-blank canvas…threejs-3d-generatorthree.js · MITDrives the paid Tripo API to make 3D models for a three.js project: text to 3D, image to 3D, texturing, auto-rigging, animation…threejs-image-generatorthree.js · MITDrives Google's Gemini image API to make the 2D layer of a 3D project: concept sheets, clean reference images for image-to-3D, texture…threejs-audio-generatorthree.js · MITDrives the paid ElevenLabs API for game sound: short sound effects, looping ambience, music tracks, spoken lines, voice conversion from a…create_threejs_game.pyTool · MITCopies the starter into a folder you name and rewrites the project name in package.json and the lockfile. It only copies files; it installs…inspect-threejs-canvas.mjsTool · MITOpens a running page in headless Chromium, checks the canvas is not blank, and measures the picture: color entropy, share of the dominant…check_evidence.pyTool · MITChecks that the screenshots and reports a finished game claims really exist on disk, belong to the current run, are not blank and recorded…probe_asset_credentials.shTool · MITPrints whether three API keys are set (TRIPO_API_KEY, GEMINI_API_KEY, ELEVENLABS_API_KEY) as SET or MISSING, never the values. To see keys…threejs_3d_asset.pyTool · MITA 73 KB command-line client for the Tripo API using only Python's standard library: text, image, status, download, postprocess…generate_image.pyTool · MITA small script that sends a prompt, and optionally an image to edit, to Google's Gemini image API and saves a PNG at 1K, 2K or 4K.threejs_audio_asset.pyTool · MITA command-line client for the ElevenLabs API using only Python's standard library: sfx (with --loop), music (a prompt or a composition plan…install.shTool · MITCopies the nine skill folders into an agent's skills folder in your home directory (Claude Code, Codex, or a shared agents folder) and…Renderer and environment map setupthree.js · MITFive lines that give a scene studio reflections with no HDR file: sRGB output, ACES tone mapping, and a RoomEnvironment baked once through…Painted metal materialthree.js · MITClearcoat over a colored base, for a car body or a hull panel. One line of three.js; assumes the environment map setup.Bare brushed metal materialthree.js · MITRaw steel that needs the environment map to read as metal. One line of three.js; assumes the environment map setup.Rubber materialthree.js · MITNear-black, almost no reflection, for tyres and grips. One line of three.js; assumes the environment map setup.Matte plastic materialthree.js · MITMid roughness with a muted reflection, for housings and crates. One line of three.js; assumes the environment map setup.Glossy ceramic materialthree.js · MITA sharp wet-look reflection with full clearcoat. In our trial the white version bloomed as hard as the emissive ball under a bright light…Emissive signal materialthree.js · MITA dark base with a glow strong enough to feed bloom, for beacons, status lights and pickup cores. One line of three.js; assumes the…Cloth materialthree.js · MITHigh roughness plus sheen for the soft edge highlight of fabric. One line of three.js; assumes the environment map setup.Real refractive glass materialthree.js · MITTrue transmission for one or two hero surfaces seen close. Costly: every transmissive material adds a whole extra scene render each frame…Cheap fake glass materialthree.js · MITTransparent clearcoat with no extra render pass, for repeated windows, visors and shields. One line of three.js; assumes the environment…Fresnel rim glowthree.js · MITAdds a colored glow at the grazing edges of a standard material by injecting three lines of GLSL with onBeforeCompile, so the lit material…Scrolling emissive panelsthree.js · MITBands of light that travel along a surface, for energy conduits, charge bars and data flowing through a pipe. Time is one uniform (uTime)…Wind swaythree.js · MITSways grass cards, flags or cables in the vertex shader, anchored at the base, with each instance of an InstancedMesh out of phase by its…Dissolve and spawnthree.js · MITMakes an object appear or vanish in small blocks with a glowing edge. One uniform, uProgress from 0 to 1, is the whole state, which makes…Gradient sky domethree.js · MITA back-facing sphere with a small shader: a top color, a horizon color, a sun disc and its halo. One draw call and no textures, for any…Post-processing chainthree.js · MITThe finishing pass: EffectComposer with a render pass, bloom (strength 0.45, radius 0.3, threshold 0.85), a small vignette shader, and…Vertex-colour ambient occlusionthree.js · MITDarkens creases by baking a color attribute into the mesh: contact shading with no texture and no extra draw call.Polygon-offset decalsthree.js · MITA flat mesh laid on a surface with polygonOffset so it does not flicker: panel lines, numbers and marks.Fake contact shadowthree.js · MITA flat plane with a radial-gradient canvas texture under an object: grounds a floating thing with one draw call and no shadow map.Emissive level-of-detail signalsthree.js · MITRaise emissiveIntensity or swap material by distance so far lights still read; keep the color the same so identity survives.Matcap propsthree.js · MITMeshMatcapMaterial bakes lighting into one texture: the cheapest lit-looking material for background props. It ignores scene lights.TweenManager and three easingsthree.js · MITA 40-line tween runner with easeInQuad, easeOutCubic and easeOutBack (the one that overshoots), advanced by a delta you pass in. No…Trauma-based screenshakethree.js · MITCamera shake where shake equals trauma squared, trauma decays 1.4 per second and is capped at 1, and the noise comes from accumulated time…Hitstopthree.js · MITA 60 to 90 ms near-freeze on a heavy hit: scale the gameplay delta to 0.05 while the camera and feedback keep real time. In a video it is…Squash and stretchthree.js · MITDeform on impact and bounce back with easeOutBack, keeping volume: when one axis scales by s the other two scale by 1 / sqrt(s). About 0.9…Camera kick and FOV punchthree.js · MITAdd 4 to 8 degrees of field of view on a boost or a hit and let it decay with a 0.2 s time constant; remember updateProjectionMatrix()…Impact flashthree.js · MITPulse a material's emissiveIntensity to a peak and tween it back in 0.22 s; for big events add a one-frame white overlay div fading over…Pickup popthree.js · MITA collected thing scales up to 1.6, rises and fades over 0.28 s, with a 120 ms scale punch on its counter. A good recipe for a number or an…Gamepad rumblethree.js · MITFeature-detected controller vibration with a swallowed promise. Interactive use only; nothing to render. Code is in the reference page…Audio pitch variance and duckingthree.js · MITVary each playback's pitch by plus or minus 6 percent from a seeded generator so repeats do not sound machine-made, and duck the bed under…Rapier setup with a fixed timestepthree.js · MITHow to add real physics to a three.js scene: Rapier's world, a 1/60 s fixed step fed by a clamped accumulator, bodies and colliders…Loop.tsthree.js · MITA 30-line animation loop: requestAnimationFrame, delta in seconds capped at 0.05, update then render. It reads the browser's clock; to…Renderer.tsthree.js · MITcreateRenderer (antialias, sRGB output, ACES tone mapping at 1.05 exposure, PCF shadows) and resizeRenderer, which keeps canvas size, pixel…CameraRig.tsthree.js · MITA follow camera at a fixed offset that eases toward its target with an exponential lag (1 - exp(-dt / lag)) and looks slightly ahead of it…random.ts (seeded random)three.js · MITmulberry32 in nine lines: createSeededRandom(seed) returns a function that gives the same sequence every time. The thing to use in place of…dispose.tsthree.js · MITdisposeObject3D walks a three.js object and frees its geometries, materials and every texture on them. Use it when a scene is torn down so…InputController.tsthree.js · MITKeyboard (WASD and arrows, Space or Shift to dash) and a touch stick merged into one movement vector, with pointer-cancel handling so a…AudioSystem.tsthree.js · MITA Web Audio context unlocked on the first key or pointer press, and one synthesised pickup blip (a triangle wave swept up over 0.12 s)…Test hooks and diagnostics contractTool · MITTwo objects a page puts on window so a script can take a repeatable picture of it: diagnostics (frame count, renderer draw calls and…visual.spec.tsTool · MITA Playwright smoke test (one test, run on a desktop and a phone profile): the canvas is big enough and its pixels vary, so a blank or…visual-regression.template.tsTool · MITA Playwright screenshot-baseline template that seeds, sets a named state, freezes, hides debug UI and then compares against a stored…bot-playtest.template.tsTool · MITA Playwright bot that holds keys on a script and measures whether the game really plays: frames advanced, distance moved, score gained, and…GameAudio manager shapethree.js · MITA 25-line Web Audio manager: unlock on a gesture, load and decode buffers by id, play through named gain groups (master, sfx, ui, ambience…Visual scorecardSkill · MITA ten-category rubric for judging a real-time 3D picture from 0 to 3 (art direction, hero, obstacles, rewards, world, materials, lighting…Render budgets and material kitSkill · MITStarting budgets for a browser 3D scene on desktop and phone (draw calls 300 and 150, triangles 750k and 300k, textures 60 and 40, shadow…Modelling and world recipesSkill · MITParts lists for building convincing models from three.js geometry alone: a hero vehicle, a hero character, obstacle families, rewards and a…Genre design patternsSkill · MITShort design vocabulary for eight game genres (endless runner, arcade racer, dogfight, tower defense, billiards, mini golf, boss fight…Evidence manifest formatSkill · MITA small JSON format that declares which viewport and state pairs one verification pass must capture, with a run id, so old screenshots…