1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186 | import * as THREE from 'three'
import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls'
import Stats from 'three/examples/jsm/libs/stats.module'
import { GUI } from 'dat.gui'
import { OBJLoader } from 'three/examples/jsm/loaders/OBJLoader'
import * as CANNON from 'cannon-es'
import CannonUtils from './utils/cannonUtils'
import CannonDebugRenderer from './utils/cannonDebugRenderer'
import { ConvexGeometry } from 'three/examples/jsm/geometries/ConvexGeometry'
const scene = new THREE.Scene()
scene.add(new THREE.AxesHelper(5))
var light1 = new THREE.SpotLight()
light1.position.set(2.5, 5, 5)
light1.angle = Math.PI / 4
light1.penumbra = 0.5
light1.castShadow = true
light1.shadow.mapSize.width = 1024
light1.shadow.mapSize.height = 1024
light1.shadow.camera.near = 0.5
light1.shadow.camera.far = 20
scene.add(light1)
var light2 = new THREE.SpotLight()
light2.position.set(-2.5, 5, 5)
light2.angle = Math.PI / 4
light2.penumbra = 0.5
light2.castShadow = true
light2.shadow.mapSize.width = 1024
light2.shadow.mapSize.height = 1024
light2.shadow.camera.near = 0.5
light2.shadow.camera.far = 20
scene.add(light2)
const camera = new THREE.PerspectiveCamera(
75,
window.innerWidth / window.innerHeight,
0.1,
1000
)
camera.position.set(0, 4, 4)
const renderer = new THREE.WebGLRenderer()
renderer.setSize(window.innerWidth, window.innerHeight)
renderer.shadowMap.enabled = true
renderer.shadowMap.type = THREE.PCFSoftShadowMap
document.body.appendChild(renderer.domElement)
const controls = new OrbitControls(camera, renderer.domElement)
controls.screenSpacePanning = true
controls.target.y = 2
const world = new CANNON.World()
world.gravity.set(0, -9.82, 0)
const normalMaterial = new THREE.MeshNormalMaterial()
const phongMaterial = new THREE.MeshPhongMaterial()
let monkeyMeshes: THREE.Object3D[] = []
let monkeyBodies: CANNON.Body[] = []
let monkeyLoaded = false
const objLoader = new OBJLoader()
objLoader.load(
'models/monkey.obj',
(object) => {
const monkeyMesh = object.children[0] as THREE.Mesh
monkeyMesh.material = normalMaterial
// const positions = monkeyMesh.geometry.attributes.position.array
// const points: THREE.Vector3[] = []
// for (let i = 0; i < positions.length; i += 3) {
// points.push(new THREE.Vector3(positions[i], positions[i + 1], positions[i + 2]))
// }
// const convexHull = new ConvexGeometry(points)
for (let i = 0; i < 10; i++) {
const monkeyMeshClone = monkeyMesh.clone()
monkeyMeshClone.position.x = Math.floor(Math.random() * 10) - 5
monkeyMeshClone.position.z = Math.floor(Math.random() * 10) - 5
monkeyMeshClone.position.y = 5 + i
scene.add(monkeyMeshClone)
monkeyMeshes.push(monkeyMeshClone)
const monkeyShape = CannonUtils.CreateTrimesh(
(monkeyMesh as THREE.Mesh).geometry
)
// const monkeyShape = CannonUtils.CreateConvexPolyhedron(new THREE.IcosahedronGeometry(1))
// const monkeyShape = CannonUtils.CreateConvexPolyhedron((monkeyMesh as THREE.Mesh).geometry)
// const monkeyShape = CannonUtils.CreateConvexPolyhedron(convexHull)
const monkeyBody = new CANNON.Body({ mass: 1 })
monkeyBody.addShape(monkeyShape)
// monkeyBody.addShape(new CANNON.Sphere(1))// head,
// monkeyBody.addShape(new CANNON.Sphere(.8), new CANNON.Vec3(0, .2, 0))// head,
// monkeyBody.addShape(new CANNON.Sphere(.05), new CANNON.Vec3(0, -.97, 0.46))// chin,
// monkeyBody.addShape(new CANNON.Sphere(.05), new CANNON.Vec3(-1.36, .29, -0.5)) //left ear
// monkeyBody.addShape(new CANNON.Sphere(.05), new CANNON.Vec3(1.36, .29, -0.5)) //right ear
monkeyBody.position.x = monkeyMeshClone.position.x
monkeyBody.position.y = monkeyMeshClone.position.y
monkeyBody.position.z = monkeyMeshClone.position.z
world.addBody(monkeyBody)
monkeyBodies.push(monkeyBody)
}
monkeyLoaded = true
},
(xhr) => {
console.log((xhr.loaded / xhr.total) * 100 + '% loaded')
},
(error) => {
console.log('An error happened')
}
)
const planeGeometry = new THREE.PlaneGeometry(25, 25)
const planeMesh = new THREE.Mesh(planeGeometry, phongMaterial)
planeMesh.rotateX(-Math.PI / 2)
planeMesh.receiveShadow = true
scene.add(planeMesh)
const planeShape = new CANNON.Plane()
const planeBody = new CANNON.Body({ mass: 0 })
planeBody.addShape(planeShape)
planeBody.quaternion.setFromAxisAngle(new CANNON.Vec3(1, 0, 0), -Math.PI / 2)
world.addBody(planeBody)
window.addEventListener('resize', onWindowResize, false)
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight
camera.updateProjectionMatrix()
renderer.setSize(window.innerWidth, window.innerHeight)
render()
}
const stats = Stats()
document.body.appendChild(stats.dom)
const gui = new GUI()
const physicsFolder = gui.addFolder('Physics')
physicsFolder.add(world.gravity, 'x', -10.0, 10.0, 0.1)
physicsFolder.add(world.gravity, 'y', -10.0, 10.0, 0.1)
physicsFolder.add(world.gravity, 'z', -10.0, 10.0, 0.1)
physicsFolder.open()
const clock = new THREE.Clock()
let delta
const cannonDebugRenderer = new CannonDebugRenderer(scene, world)
function animate() {
requestAnimationFrame(animate)
controls.update()
delta = Math.min(clock.getDelta(), 0.1)
world.step(delta)
cannonDebugRenderer.update()
// Copy coordinates from Cannon to Three.js
if (monkeyLoaded) {
monkeyMeshes.forEach((m, i) => {
m.position.set(
monkeyBodies[i].position.x,
monkeyBodies[i].position.y,
monkeyBodies[i].position.z
)
m.quaternion.set(
monkeyBodies[i].quaternion.x,
monkeyBodies[i].quaternion.y,
monkeyBodies[i].quaternion.z,
monkeyBodies[i].quaternion.w
)
})
}
render()
stats.update()
}
function render() {
renderer.render(scene, camera)
}
animate()
|
Paperback 
