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falling_shapes.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>JoltPhysics.js demo</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>
<div id="container">Loading...</div>
<div id="info">JoltPhysics.js falling shapes demo<br/>
This demo shows supported shape types</div>
<script src="js/three/three.min.js"></script>
<script src="js/three/OrbitControls.js"></script>
<script src="js/three/WebGL.js"></script>
<script src="js/three/stats.min.js"></script>
<script src="js/example.js"></script>
<script type="module">
// In case you haven't built the library yourself, replace URL with: https://www.unpkg.com/jolt-physics/dist/jolt-physics.wasm-compat.js
import initJolt from './js/jolt-physics.wasm-compat.js';
initJolt().then(function (Jolt) {
// Spawning variables
var objectTimePeriod = 0.25;
var timeNextSpawn = time + objectTimePeriod;
var maxNumObjects = 100;
// Initialize this example
initExample(Jolt, onUpdate);
// Create a basic floor
createFloor();
// Create example mesh
createMeshFloor(30, 1, 4, 0, 5, 0);
function generateObject() {
let numTypes = 9;
let objectType = Math.ceil(Math.random() * numTypes);
let shape = null;
let colors = [0xff0000, 0xd9b1a3, 0x4d4139, 0xccad33, 0xf2ff40, 0x00ff00, 0x165943, 0x567371, 0x80d5ff, 0x69778c, 0xbeb6f2, 0x7159b3, 0x73004d, 0xd90074, 0xff8091, 0xbf3030, 0x592400, 0xa66c29, 0xb3aa86, 0x296600, 0x00e600, 0x66ccaa, 0x00eeff, 0x3d9df2, 0x000e33, 0x3d00e6, 0xb300a7, 0xff80d5, 0x330d17, 0x59332d, 0xff8c40, 0x33210d, 0x403c00, 0x89d96c, 0x0d3312, 0x0d3330, 0x005c73, 0x0066ff, 0x334166, 0x1b0066, 0x4d3949, 0xbf8faf, 0x59000c, 0x0000ff]
switch (objectType) {
case 1: {
// Sphere
let radius = 0.5 + Math.random();
shape = new Jolt.SphereShape(radius, null);
break;
}
case 2: {
// Box
let sx = 1 + Math.random();
let sy = 1 + Math.random();
let sz = 1 + Math.random();
shape = new Jolt.BoxShape(new Jolt.Vec3(sx * 0.5, sy * 0.5, sz * 0.5), 0.05, null);
break;
}
case 3: {
// Cylinder
let radius = 0.5 + Math.random();
let halfHeight = 0.5 + 0.5 * Math.random();
shape = new Jolt.CylinderShape(halfHeight, radius, 0.05, null);
break;
}
case 4: {
// Capsule
let radius = 0.5 + Math.random();
let halfHeight = 0.5 + 0.5 * Math.random();
shape = new Jolt.CapsuleShape(halfHeight, radius, null);
break;
}
case 5: {
// Tapered capsule
let topRadius = 0.1 + Math.random();
let bottomRadius = 0.5 + Math.random();
let halfHeight = 0.5 * (topRadius + bottomRadius + Math.random());
shape = new Jolt.TaperedCapsuleShapeSettings(halfHeight, topRadius, bottomRadius, null).Create().Get();
break;
}
case 6: {
// Convex hull
let hull = new Jolt.ConvexHullShapeSettings;
for (let p = 0; p < 10; ++p)
hull.mPoints.push_back(new Jolt.Vec3(-0.5 + 2 * Math.random(), -0.5 + 2 * Math.random(), -0.5 + 2 * Math.random()));
shape = hull.Create().Get();
break;
}
case 7: {
// Static compound shape
let shapeSettings = new Jolt.StaticCompoundShapeSettings();
let l = 1.0 + Math.random();
let r2 = 0.5 + 0.5 * Math.random();
let r1 = 0.5 * r2;
shapeSettings.AddShape(new Jolt.Vec3(-l, 0, 0), Jolt.Quat.prototype.sIdentity(), new Jolt.SphereShapeSettings(r2));
shapeSettings.AddShape(new Jolt.Vec3(l, 0, 0), Jolt.Quat.prototype.sIdentity(), new Jolt.SphereShapeSettings(r2));
shapeSettings.AddShape(new Jolt.Vec3(0, 0, 0), Jolt.Quat.prototype.sRotation(new Jolt.Vec3(0, 0, 1), 0.5 * Math.PI), new Jolt.CapsuleShapeSettings(l, r1));
shape = shapeSettings.Create().Get();
break;
}
case 8: {
// Mutable compound shape
let shapeSettings = new Jolt.MutableCompoundShapeSettings();
let l = 1.0 + Math.random();
let r2 = 0.5 + 0.5 * Math.random();
let r1 = 0.5 * r2;
shapeSettings.AddShape(new Jolt.Vec3(-l, 0, 0), Jolt.Quat.prototype.sIdentity(), new Jolt.SphereShapeSettings(r2));
shapeSettings.AddShape(new Jolt.Vec3(l, 0, 0), Jolt.Quat.prototype.sIdentity(), new Jolt.BoxShapeSettings(Jolt.Vec3.prototype.sReplicate(r2)));
shapeSettings.AddShape(new Jolt.Vec3(0, 0, 0), Jolt.Quat.prototype.sRotation(new Jolt.Vec3(0, 0, 1), 0.5 * Math.PI), new Jolt.CapsuleShapeSettings(l, r1));
shape = shapeSettings.Create().Get();
break;
}
case 9: {
// Sphere with COM offset
let radius = 0.5;
shape = new Jolt.OffsetCenterOfMassShapeSettings(new Jolt.Vec3(0, -0.1 * radius, 0), new Jolt.SphereShapeSettings(radius, null)).Create().Get();
break;
}
}
// Position and rotate body
let pos = new Jolt.RVec3((Math.random() - 0.5) * 25, 15, (Math.random() - 0.5) * 25);
let rot = getRandomQuat();
// Create physics body
let creationSettings = new Jolt.BodyCreationSettings(shape, pos, rot, Jolt.EMotionType_Dynamic, LAYER_MOVING);
creationSettings.mRestitution = 0.5;
let body = bodyInterface.CreateBody(creationSettings);
addToScene(body, colors[objectType - 1]);
}
function onUpdate(time, deltaTime) {
// Check if its time to spawn a new object
if (dynamicObjects.length < maxNumObjects && time > timeNextSpawn) {
generateObject();
timeNextSpawn = time + objectTimePeriod;
}
}
});
</script>
</body>
</html>