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219 | import * as THREE from 'three'
import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls'
import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader'
import Stats from 'three/examples/jsm/libs/stats.module'
import {
CSS2DRenderer,
CSS2DObject,
} from 'three/examples/jsm/renderers/CSS2DRenderer'
const scene = new THREE.Scene()
const light = new THREE.SpotLight(0xffffff, 1000)
light.position.set(12.5, 12.5, 12.5)
light.castShadow = true
light.shadow.mapSize.width = 1024
light.shadow.mapSize.height = 1024
scene.add(light)
const camera = new THREE.PerspectiveCamera(
75,
window.innerWidth / window.innerHeight,
0.1,
1000
)
camera.position.set(15, 15, 15)
const renderer = new THREE.WebGLRenderer()
renderer.shadowMap.enabled = true
renderer.setSize(window.innerWidth, window.innerHeight)
document.body.appendChild(renderer.domElement)
const labelRenderer = new CSS2DRenderer()
labelRenderer.setSize(window.innerWidth, window.innerHeight)
labelRenderer.domElement.style.position = 'absolute'
labelRenderer.domElement.style.top = '0px'
labelRenderer.domElement.style.pointerEvents = 'none'
document.body.appendChild(labelRenderer.domElement)
const controls = new OrbitControls(camera, renderer.domElement)
controls.enableDamping = true
const pickableObjects: THREE.Mesh[] = []
const loader = new GLTFLoader()
loader.load(
'models/simplescene.glb',
function (gltf) {
gltf.scene.traverse(function (child) {
if ((child as THREE.Mesh).isMesh) {
const m = child as THREE.Mesh
switch (m.name) {
case 'Plane':
m.receiveShadow = true
break
default:
m.castShadow = true
}
pickableObjects.push(m)
}
})
scene.add(gltf.scene)
},
(xhr) => {
console.log((xhr.loaded / xhr.total) * 100 + '% loaded')
},
(error) => {
console.log(error)
}
)
window.addEventListener('resize', onWindowResize, false)
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight
camera.updateProjectionMatrix()
renderer.setSize(window.innerWidth, window.innerHeight)
labelRenderer.setSize(window.innerWidth, window.innerHeight)
render()
}
let ctrlDown = false
let lineId = 0
let line: THREE.Line
let drawingLine = false
const measurementLabels: { [key: number]: CSS2DObject } = {}
window.addEventListener('keydown', function (event) {
if (event.key === 'Control') {
ctrlDown = true
controls.enabled = false
renderer.domElement.style.cursor = 'crosshair'
}
})
window.addEventListener('keyup', function (event) {
if (event.key === 'Control') {
ctrlDown = false
controls.enabled = true
renderer.domElement.style.cursor = 'pointer'
if (drawingLine) {
//delete the last line because it wasn't committed
scene.remove(line)
scene.remove(measurementLabels[lineId])
drawingLine = false
}
}
})
const raycaster = new THREE.Raycaster()
let intersects: THREE.Intersection[]
const mouse = new THREE.Vector2()
renderer.domElement.addEventListener('pointerdown', onClick, false)
function onClick() {
if (ctrlDown) {
raycaster.setFromCamera(mouse, camera)
intersects = raycaster.intersectObjects(pickableObjects, false)
if (intersects.length > 0) {
if (!drawingLine) {
//start the line
const points = []
points.push(intersects[0].point)
points.push(intersects[0].point.clone())
const geometry = new THREE.BufferGeometry().setFromPoints(
points
)
line = new THREE.LineSegments(
geometry,
new THREE.LineBasicMaterial({
color: 0xffffff,
transparent: true,
opacity: 0.75,
// depthTest: false,
// depthWrite: false
})
)
line.frustumCulled = false
scene.add(line)
const measurementDiv = document.createElement(
'div'
) as HTMLDivElement
measurementDiv.className = 'measurementLabel'
measurementDiv.innerText = '0.0m'
const measurementLabel = new CSS2DObject(measurementDiv)
measurementLabel.position.copy(intersects[0].point)
measurementLabels[lineId] = measurementLabel
scene.add(measurementLabels[lineId])
drawingLine = true
} else {
//finish the line
const positions = (
line.geometry.attributes.position as THREE.BufferAttribute
).array
positions[3] = intersects[0].point.x
positions[4] = intersects[0].point.y
positions[5] = intersects[0].point.z
line.geometry.attributes.position.needsUpdate = true
lineId++
drawingLine = false
}
}
}
}
document.addEventListener('mousemove', onDocumentMouseMove, false)
function onDocumentMouseMove(event: MouseEvent) {
event.preventDefault()
mouse.x = (event.clientX / renderer.domElement.clientWidth) * 2 - 1
mouse.y = -(event.clientY / renderer.domElement.clientHeight) * 2 + 1
if (drawingLine) {
raycaster.setFromCamera(mouse, camera)
intersects = raycaster.intersectObjects(pickableObjects, false)
if (intersects.length > 0) {
const positions = (
line.geometry.attributes.position as THREE.BufferAttribute
).array
const v0 = new THREE.Vector3(
positions[0],
positions[1],
positions[2]
)
const v1 = new THREE.Vector3(
intersects[0].point.x,
intersects[0].point.y,
intersects[0].point.z
)
positions[3] = intersects[0].point.x
positions[4] = intersects[0].point.y
positions[5] = intersects[0].point.z
line.geometry.attributes.position.needsUpdate = true
const distance = v0.distanceTo(v1)
measurementLabels[lineId].element.innerText =
distance.toFixed(2) + 'm'
measurementLabels[lineId].position.lerpVectors(v0, v1, 0.5)
}
}
}
const stats = new Stats()
document.body.appendChild(stats.dom)
function animate() {
requestAnimationFrame(animate)
controls.update()
render()
stats.update()
}
function render() {
labelRenderer.render(scene, camera)
renderer.render(scene, camera)
}
animate()
|
