cannon
Version:
A lightweight 3D physics engine written in JavaScript.
130 lines (113 loc) • 4.08 kB
HTML
<html>
<head>
<title>cannon.js - trimesh demo</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 src="../build/cannon.js"></script>
<script src="../build/cannon.demo.js"></script>
<script src="../libs/dat.gui.js"></script>
<script src="../libs/Three.js"></script>
<script src="../libs/TrackballControls.js"></script>
<script src="../libs/Detector.js"></script>
<script src="../libs/Stats.js"></script>
<script src="../libs/smoothie.js"></script>
<script>
var demo = new CANNON.Demo();
var size = 2;
demo.addScene("Raycasting",function(){
var shape = CANNON.Trimesh.createTorus(4, 3.5, 16, 16);
// Create world
var world = demo.getWorld();
world.gravity.set(0,0,0);
// particle as marker for the raycast hit
var N = 10;
var particleShape = new CANNON.Particle();
var particleBodies = [];
for(var i=0; i<N*N; i++){
var particleBody = new CANNON.Body({
mass: 1,
shape: particleShape,
collisionResponse: false
});
world.add(particleBody);
demo.addVisual(particleBody);
particleBodies.push(particleBody);
}
// Shape on plane
var shapeBody = new CANNON.Body({ mass: 1, position: new CANNON.Vec3(0.01, 0.01, 0.01) });
shapeBody.addShape(shape);
shapeBody.angularVelocity.set(0,1,0);
world.add(shapeBody);
demo.addVisual(shapeBody);
var from = new CANNON.Vec3(10,1,0);
var to = new CANNON.Vec3(-10,1,0);
var result = new CANNON.RaycastResult();
var raycastOptions = {};
var listener = function (evt) {
for(var i=0; i<N; i++){
for(var j=0; j<N; j++){
from.set(
10,
i * 0.1,
j * 0.1
);
to.set(
-10,
i * 0.1,
j * 0.1
);
result.reset();
world.raycastClosest(from, to, raycastOptions, result);
particleBodies[i * N + j].position.copy(result.hitPointWorld);
}
}
};
world.addEventListener('postStep', listener);
var destroyer = function(){
world.removeEventListener('postStep', listener);
demo.removeEventListener('destroy', destroyer);
};
demo.addEventListener('destroy', destroyer);
});
demo.addScene("Trimesh",function(){
var shape = CANNON.Trimesh.createTorus(4, 3.5, 16, 16);
// Create world
var world = demo.getWorld();
world.gravity.set(0,0,-10);
world.broadphase = new CANNON.NaiveBroadphase();
world.solver.iterations = 10;
world.defaultContactMaterial.contactEquationStiffness = 1e7;
world.defaultContactMaterial.contactEquationRelaxation = 4;
// ground plane
var groundShape = new CANNON.Plane();
var groundBody = new CANNON.Body({ mass: 0 });
groundBody.addShape(groundShape);
world.add(groundBody);
demo.addVisual(groundBody);
// sphere
var sphereShape = new CANNON.Sphere(1);
var sphereBody = new CANNON.Body({
mass: 1,
shape: sphereShape,
position: new CANNON.Vec3(3,3,11)
});
world.add(sphereBody);
demo.addVisual(sphereBody);
// Shape on plane
var shapeBody = new CANNON.Body({ mass: 1 });
shapeBody.addShape(shape);
var pos = new CANNON.Vec3(0,0,size);
shapeBody.position.set(0,0,size*2);
shapeBody.velocity.set(0,1,1);
shapeBody.angularVelocity.set(0,0,0);
world.add(shapeBody);
demo.addVisual(shapeBody);
});
demo.start();
</script>
</body>
</html>