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Merge pull request #40 from react-spring/performance
Fix performance issues and introduce Performance example
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,125 @@ | ||
| <!DOCTYPE html> | ||
| <html> | ||
| <head> | ||
| <title>cannon.js - performance tests</title> | ||
| <meta charset="utf-8" /> | ||
| <link rel="stylesheet" href="css/style.css" type="text/css" /> | ||
| <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0" /> | ||
| </head> | ||
| <body> | ||
| <script type="module"> | ||
| import * as CANNON from '../dist/cannon-es.js' | ||
| import { Demo } from './js/Demo.js' | ||
|
|
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| /** | ||
| * Test the performance limits with a lot of stuff happening all at the same time. | ||
| * The simulation should not slow down but rather skip ahead when introducing jank. | ||
| * When there are too many object to simulate, the simulation will slow down but still run at a stable framerate. | ||
| */ | ||
| const demo = new Demo() | ||
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| let rafId | ||
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| demo.addScene('200 boxes', () => { | ||
| setupFallingBoxes({ N: 200 }) | ||
| }) | ||
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| demo.addScene('500 boxes', () => { | ||
| setupFallingBoxes({ N: 500 }) | ||
| }) | ||
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| demo.addScene('100 boxes + 32ms jank', () => { | ||
| setupFallingBoxes({ N: 100, JANK: 32 }) | ||
| }) | ||
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| demo.addScene('100 boxes + 48ms jank', () => { | ||
| setupFallingBoxes({ N: 100, JANK: 48 }) | ||
| }) | ||
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| demo.addScene('100 boxes + 64ms jank', () => { | ||
| setupFallingBoxes({ N: 100, JANK: 64 }) | ||
| }) | ||
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| demo.addScene('100 boxes + 128ms jank', () => { | ||
| setupFallingBoxes({ N: 100, JANK: 128 }) | ||
| }) | ||
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| function setupFallingBoxes({ N, JANK }) { | ||
| if (rafId) cancelAnimationFrame(rafId) | ||
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| const world = setupWorld(demo) | ||
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| const size = 0.25 | ||
| const mass = 1 | ||
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| const boxShape = new CANNON.Box(new CANNON.Vec3(size, size, size)) | ||
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| const boxes = [] | ||
| for (let i = 0; i < N; i++) { | ||
| // start with random positions | ||
| const position = new CANNON.Vec3( | ||
| (Math.random() * 2 - 1) * 2.5, | ||
| Math.random() * 10, | ||
| (Math.random() * 2 - 1) * 2.5 | ||
| ) | ||
|
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| const boxBody = new CANNON.Body({ | ||
| position, | ||
| mass, | ||
| }) | ||
| boxBody.addShape(boxShape) | ||
| world.addBody(boxBody) | ||
| // demo.addVisual(boxBody) | ||
| boxes.push(boxBody) | ||
| } | ||
|
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| // Use instancing so three.js doesn't get in the way | ||
| // of performance measuring | ||
| demo.addVisualInstanced(boxes) | ||
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| function animate(ms) { | ||
| rafId = requestAnimationFrame(animate) | ||
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| const time = ms / 1000 | ||
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| const index = Math.floor(Math.random() * N) | ||
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| boxes[index].position.set(0, Math.random() * 10, 0) | ||
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| if (JANK) { | ||
| blockThread(JANK) | ||
| } | ||
| } | ||
| rafId = requestAnimationFrame(animate) | ||
| } | ||
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| demo.start() | ||
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| function setupWorld(demo) { | ||
| const world = demo.getWorld() | ||
| world.gravity.set(0, -50, 0) | ||
| // world.broadphase = new CANNON.SAPBroadphase(world) | ||
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| // world.solver.iterations = 20; | ||
| // world.solver.tolerance = 0.001; | ||
| // world.allowSleep = true; | ||
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| // Static ground plane | ||
| const groundShape = new CANNON.Plane() | ||
| const groundBody = new CANNON.Body({ mass: 0 }) | ||
| groundBody.addShape(groundShape) | ||
| groundBody.quaternion.setFromEuler(-Math.PI / 2, 0, 0) | ||
| world.addBody(groundBody) | ||
| demo.addVisual(groundBody) | ||
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| return world | ||
| } | ||
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| // Block the javascript thread for N milliseconds | ||
| function blockThread(milliseconds = 0) { | ||
| const start = performance.now() | ||
| while (performance.now() < start + milliseconds) {} | ||
| } | ||
| </script> | ||
| </body> | ||
| </html> |
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