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convex-objects-breaking.html
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convex-objects-breaking.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta
name="viewport"
content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no, viewport-fit=cover"
/>
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>Convex Objects Breaking</title>
<link rel="stylesheet" href="/css/examples.css?ver=1.0.0" />
<script src="/js/examples.js?ver=1.1.1"></script>
<script src="/lib/three.min.js?ver=r130"></script>
<script src="/lib/ConvexHull.js"></script>
<script src="/lib/ConvexGeometry.js"></script>
<script src="/lib/OrbitControls.js"></script>
<script src="/lib/enable3d/enable3d.ammoPhysics.0.25.4.min.js"></script>
</head>
<body>
<script>
const { AmmoPhysics, PhysicsLoader } = ENABLE3D
const MainScene = () => {
// scene
const scene = new THREE.Scene()
scene.background = new THREE.Color(0xf0f0f0)
// camera
const camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 0.1, 1000)
camera.position.set(10, 10, 20)
// renderer
const renderer = new THREE.WebGLRenderer()
renderer.setSize(window.innerWidth, window.innerHeight)
document.body.appendChild(renderer.domElement)
// dpr
const DPR = window.devicePixelRatio
renderer.setPixelRatio(Math.min(2, DPR))
// orbit controls
const controls = new THREE.OrbitControls(camera, renderer.domElement)
// light
scene.add(new THREE.HemisphereLight(0xffffbb, 0x080820, 1))
scene.add(new THREE.AmbientLight(0x666666))
const light = new THREE.DirectionalLight(0xdfebff, 1)
light.position.set(50, 200, 100)
light.position.multiplyScalar(1.3)
// physics
const physics = new AmmoPhysics(scene, { maxSubSteps: 4, fixedTimeStep: 1 / 120 })
physics.debug.enable(true)
// elements
addHouse(physics)
initCanon(physics, camera)
// clock
const clock = new THREE.Clock()
// loop
const animate = () => {
physics.update(clock.getDelta() * 1000)
physics.updateDebugger()
renderer.render(scene, camera)
requestAnimationFrame(animate)
}
requestAnimationFrame(animate)
}
const addHouse = physics => {
// extract the object factory from physics
// the factory will make/add object without physics
const { factory } = physics
const config = {
depth: 0.4,
breakable: true,
fractureImpulse: 5,
collisionFlags: 3
}
// front
physics.add.box({ y: 3, x: 2, z: 4, width: 4, height: 2, ...config })
physics.add.box({ y: 1, x: 2, z: 4, width: 4, height: 2, ...config })
physics.add.box({ y: 1, x: -2, z: 4, width: 4, height: 2, ...config })
physics.add.box({ y: 3, x: -2, z: 4, width: 4, height: 2, ...config })
// back
physics.add.box({ y: 1, x: -2, z: 0, width: 4, height: 2, ...config })
physics.add.box({ y: 3, x: -2, z: 0, width: 4, height: 2, ...config })
physics.add.box({ y: 1, x: 2, z: 0, width: 4, height: 2, ...config })
physics.add.box({ y: 3, x: 2, z: 0, width: 4, height: 2, ...config })
// left and right
physics.add.box({ ...config, y: 2, x: -4, z: 2, depth: 4, height: 4, width: 1 })
physics.add.box({ ...config, y: 2, x: 4, z: 2, depth: 4, height: 4, width: 1 })
// roof
let r1 = factory.add.box({ y: 4.75, x: 0, z: 0.5, width: 8, height: 4, ...config })
let r2 = factory.add.box({ y: 4.75, x: 0, z: 3.5, width: 8, height: 4, ...config })
r1.rotateX(Math.PI / 4)
r2.rotateX(-Math.PI / 4)
physics.add.existing(r1, { collisionFlags: 3, breakable: true })
physics.add.existing(r2, { collisionFlags: 3, breakable: true })
}
const initCanon = (physics, camera) => {
const raycaster = new THREE.Raycaster()
const force = 30
window.addEventListener('pointerdown', event => {
// calculate mouse position in normalized device coordinates
// (-1 to +1) for both components
const x = (event.clientX / window.innerWidth) * 2 - 1
const y = -(event.clientY / window.innerHeight) * 2 + 1
raycaster.setFromCamera({ x, y }, camera)
const pos = new THREE.Vector3()
pos.copy(raycaster.ray.direction)
pos.add(raycaster.ray.origin)
const sphere = physics.add.sphere(
{
radius: 0.15,
x: pos.x,
y: pos.y,
z: pos.z,
mass: 20,
bufferGeometry: true
},
{ phong: { color: 0x202020 } }
)
sphere.body.setBounciness(0.2)
pos.copy(raycaster.ray.direction)
pos.multiplyScalar(24)
sphere.body.applyForce(pos.x * force, pos.y * force, pos.z * force)
})
}
PhysicsLoader('/lib/ammo/kripken', () => MainScene())
console.log(`three.js version "${THREE.REVISION}"`)
</script>
</body>
</html>