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135 | import * as THREE from 'three'
import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls'
import Stats from 'three/examples/jsm/libs/stats.module'
const scene = new THREE.Scene()
const camera = new THREE.PerspectiveCamera(
75,
window.innerWidth / window.innerHeight,
0.1,
1000
)
camera.position.z = 2
const renderer = new THREE.WebGLRenderer()
renderer.setSize(window.innerWidth, window.innerHeight)
document.body.appendChild(renderer.domElement)
const raycaster = new THREE.Raycaster()
const sceneMeshes: THREE.Mesh[] = []
const dir = new THREE.Vector3()
let intersects: THREE.Intersection[] = []
const controls = new OrbitControls(camera, renderer.domElement)
controls.enableDamping = true
controls.addEventListener('change', function () {
xLine.position.copy(controls.target)
yLine.position.copy(controls.target)
zLine.position.copy(controls.target)
raycaster.set(
controls.target,
dir.subVectors(camera.position, controls.target).normalize()
)
intersects = raycaster.intersectObjects(sceneMeshes, false)
if (intersects.length > 0) {
if (
intersects[0].distance < controls.target.distanceTo(camera.position)
) {
camera.position.copy(intersects[0].point)
}
}
})
const floor = new THREE.Mesh(
new THREE.PlaneBufferGeometry(10, 10),
new THREE.MeshNormalMaterial({ side: THREE.DoubleSide })
)
floor.rotateX(-Math.PI / 2)
floor.position.y = -1
scene.add(floor)
sceneMeshes.push(floor)
const wall1 = new THREE.Mesh(
new THREE.PlaneBufferGeometry(2, 2),
new THREE.MeshNormalMaterial({ side: THREE.DoubleSide })
)
wall1.position.x = 4
wall1.rotateY(-Math.PI / 2)
scene.add(wall1)
sceneMeshes.push(wall1)
const wall2 = new THREE.Mesh(
new THREE.PlaneBufferGeometry(2, 2),
new THREE.MeshNormalMaterial({ side: THREE.DoubleSide })
)
wall2.position.z = -3
scene.add(wall2)
sceneMeshes.push(wall2)
const cube: THREE.Mesh = new THREE.Mesh(
new THREE.BoxBufferGeometry(),
new THREE.MeshNormalMaterial()
)
cube.position.set(-3, 0, 0)
scene.add(cube)
sceneMeshes.push(cube)
const ceiling = new THREE.Mesh(
new THREE.PlaneBufferGeometry(10, 10),
new THREE.MeshNormalMaterial({ side: THREE.DoubleSide })
)
ceiling.rotateX(Math.PI / 2)
ceiling.position.y = 3
scene.add(ceiling)
sceneMeshes.push(ceiling)
//crosshair
const lineMaterial = new THREE.LineBasicMaterial({
color: 0x0000ff,
})
const points: THREE.Vector3[] = []
points[0] = new THREE.Vector3(-0.1, 0, 0)
points[1] = new THREE.Vector3(0.1, 0, 0)
let lineGeometry = new THREE.BufferGeometry().setFromPoints(points)
const xLine = new THREE.Line(lineGeometry, lineMaterial)
scene.add(xLine)
points[0] = new THREE.Vector3(0, -0.1, 0)
points[1] = new THREE.Vector3(0, 0.1, 0)
lineGeometry = new THREE.BufferGeometry().setFromPoints(points)
const yLine = new THREE.Line(lineGeometry, lineMaterial)
scene.add(yLine)
points[0] = new THREE.Vector3(0, 0, -0.1)
points[1] = new THREE.Vector3(0, 0, 0.1)
lineGeometry = new THREE.BufferGeometry().setFromPoints(points)
const zLine = new THREE.Line(lineGeometry, lineMaterial)
scene.add(zLine)
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)
function animate() {
requestAnimationFrame(animate)
controls.update()
render()
stats.update()
}
function render() {
renderer.render(scene, camera)
}
animate()
|
