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174 | 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 { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader'
import { CSM } from 'three/examples/jsm/csm/CSM'
import { CSMHelper } from 'three/examples/jsm/csm/CSMHelper'
const scene = new THREE.Scene()
scene.background = new THREE.Color(0x87ceeb)
const camera = new THREE.PerspectiveCamera(
75,
window.innerWidth / window.innerHeight,
0.1,
1000
)
camera.position.set(4, 1, 7)
const csm = new CSM({
fade: true,
far: camera.far,
cascades: 4,
shadowMapSize: 4096,
lightDirection: new THREE.Vector3(-1, -1, 0),
camera: camera,
parent: scene,
lightIntensity: 0.5
})
console.log(csm)
const csmHelper = new CSMHelper(csm)
csmHelper.displayFrustum = true
csmHelper.displayPlanes = true
csmHelper.displayShadowBounds = true
scene.add(csmHelper as any)
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.dampingFactor = 0.05
controls.enableDamping = true
const trees = ['birchTreeWithLeaves', 'saplingTree', 'tree1WithLeaves']
const material = new THREE.MeshPhongMaterial({ color: 0x567d46 })
const gLTFLoader = new GLTFLoader()
trees.forEach((tree) => {
gLTFLoader.load(
'models/' + tree + '.glb',
(gltf) => {
let childObjectCount = 0
gltf.scene.traverse(function (child) {
if ((child as THREE.Mesh).isMesh) {
child.castShadow = true
childObjectCount++
}
})
const instancesCount = 100
const positions = []
for (let i = 0; i < instancesCount; i++) {
positions.push(
new THREE.Vector3(
Math.random() * 200 - 100,
0,
Math.random() * 200 - 100
)
)
}
const scales = []
for (let i = 0; i < instancesCount; i++) {
scales.push({
x: Math.random() + 2,
y: Math.random() + 2,
z: Math.random() + 2
})
}
const rotations = []
for (let i = 0; i < instancesCount; i++) {
rotations.push(Math.random() * Math.PI * 2)
}
for (let i = 0; i < childObjectCount; i++) {
const geometry = (
gltf.scene.children[2].children[i] as THREE.Mesh
).geometry
const copy = new THREE.InstancedMesh(
geometry,
(gltf.scene.children[2].children[i] as THREE.Mesh).material,
instancesCount
)
copy.castShadow = true
const matrix = new THREE.Matrix4()
for (let j = 0; j < instancesCount; j++) {
matrix.makeRotationY(rotations[j])
matrix.makeScale(scales[j].x, scales[j].y, scales[j].z)
matrix.setPosition(positions[j])
copy.setMatrixAt(j, matrix)
}
scene.add(copy)
}
},
(xhr) => {
console.log((xhr.loaded / xhr.total) * 100 + '% loaded')
},
(error) => {
console.log(error)
}
)
})
const planeGeometry = new THREE.PlaneGeometry(200, 200)
const planeMesh = new THREE.Mesh(planeGeometry, material)
planeMesh.rotateX(-Math.PI / 2)
planeMesh.receiveShadow = true
scene.add(planeMesh)
window.addEventListener('resize', onWindowResize, false)
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight
camera.updateProjectionMatrix()
renderer.setSize(window.innerWidth, window.innerHeight)
render()
}
const stats = new Stats()
document.body.appendChild(stats.dom)
const gui = new GUI()
const csmFolder = gui.addFolder('CSM')
csmFolder.add(csm.lightDirection, 'x', -1, 1, 0.01)
csmFolder.add(csm.lightDirection, 'y', -1, 1, 0.01)
csmFolder.add(csm.lightDirection, 'z', -1, 1, 0.01)
csmFolder.add(csm, 'lightNear', 1, 1000, 1).onChange(function (value) {
for (let i = 0; i < csm.lights.length; i++) {
csm.lights[i].shadow.camera.near = value
csm.lights[i].shadow.camera.updateProjectionMatrix()
}
})
csmFolder.add(csm, 'lightFar', 1, 1000, 1).onChange(function (value) {
for (let i = 0; i < csm.lights.length; i++) {
csm.lights[i].shadow.camera.far = value
csm.lights[i].shadow.camera.updateProjectionMatrix()
}
})
csmFolder.add(csm, 'lightIntensity', 0.1, 2, 0.1).onChange(function (value) {
for (let i = 0; i < csm.lights.length; i++) {
csm.lights[i].intensity = value
}
})
csmFolder.open()
function animate() {
requestAnimationFrame(animate)
controls.update()
csm.update()
csmHelper.update()
render()
stats.update()
}
function render() {
renderer.render(scene, camera)
}
animate()
|
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