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Geometries

Video Lecture

Geometries Geometries Geometries

Description

Three.js has many classes for creating common geometries.

Start Scripts

./dist/client/index.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" />
        <title>Three.js TypeScript Tutorials by Sean Bradley</title>
        <style>
            body {
                overflow: hidden;
                margin: 0px;
            }

            #debug1 {
                font-family: monospace;
                font-size: larger;
                position: absolute;
                left: 0px;
                top: 50px;
                border: 1px solid red;
                width: 180px;
                height: 310px;
                color: white;
                pointer-events: none;
            }
        </style>
    </head>

    <body>
        <div id="debug1"></div>
        <script type="module" src="bundle.js"></script>
    </body>
</html>

./src/client/client.ts

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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 'three/examples/jsm/libs/dat.gui.module'

const scene = new THREE.Scene()
scene.add(new THREE.AxesHelper(5))

const camera = new THREE.PerspectiveCamera(
    75,
    window.innerWidth / window.innerHeight,
    0.1,
    1000
)
camera.position.x = -2
camera.position.y = 4
camera.position.z = 5

const renderer = new THREE.WebGLRenderer()
renderer.setSize(window.innerWidth, window.innerHeight)
document.body.appendChild(renderer.domElement)

new OrbitControls(camera, renderer.domElement)

const boxGeometry = new THREE.BoxGeometry()
// const sphereGeometry = new THREE.SphereGeometry()
// const icosahedronGeometry = new THREE.IcosahedronGeometry()

//console.log(boxGeometry)

const material = new THREE.MeshBasicMaterial({
    color: 0x00ff00,
    wireframe: true,
})

const cube = new THREE.Mesh(boxGeometry, material)
//cube.position.x = 5
scene.add(cube)

// const sphere = new THREE.Mesh(sphereGeometry, material)
// sphere.position.x = -5
// scene.add(sphere)

// const icosahedron = new THREE.Mesh(icosahedronGeometry, material)
// scene.add(icosahedron)

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 cubeFolder = gui.addFolder('Cube')
const cubeRotationFolder = cubeFolder.addFolder('Rotation')
cubeRotationFolder.add(cube.rotation, 'x', 0, Math.PI * 2, 0.01)
cubeRotationFolder.add(cube.rotation, 'y', 0, Math.PI * 2, 0.01)
cubeRotationFolder.add(cube.rotation, 'z', 0, Math.PI * 2, 0.01)
const cubePositionFolder = cubeFolder.addFolder('Position')
cubePositionFolder.add(cube.position, 'x', -10, 10)
cubePositionFolder.add(cube.position, 'y', -10, 10)
cubePositionFolder.add(cube.position, 'z', -10, 10)
const cubeScaleFolder = cubeFolder.addFolder('Scale')
cubeScaleFolder.add(cube.scale, 'x', -5, 5, 0.1) //.onFinishChange(() => console.dir(cube.geometry))
cubeScaleFolder.add(cube.scale, 'y', -5, 5, 0.1)
cubeScaleFolder.add(cube.scale, 'z', -5, 5, 0.1)
cubeFolder.add(cube, 'visible', true)
cubeFolder.open()

// const cubeData = {
//     width: 1,
//     height: 1,
//     depth: 1,
//     widthSegments: 1,
//     heightSegments: 1,
//     depthSegments: 1,
// }
// const cubePropertiesFolder = cubeFolder.addFolder('Properties')
// cubePropertiesFolder
//     .add(cubeData, 'width', 1, 30)
//     .onChange(regenerateBoxGeometry)
//     .onFinishChange(() => console.dir(cube.geometry))
// cubePropertiesFolder.add(cubeData, 'height', 1, 30).onChange(regenerateBoxGeometry)
// cubePropertiesFolder.add(cubeData, 'depth', 1, 30).onChange(regenerateBoxGeometry)
// cubePropertiesFolder.add(cubeData, 'widthSegments', 1, 30).onChange(regenerateBoxGeometry)
// cubePropertiesFolder.add(cubeData, 'heightSegments', 1, 30).onChange(regenerateBoxGeometry)
// cubePropertiesFolder.add(cubeData, 'depthSegments', 1, 30).onChange(regenerateBoxGeometry)

// function regenerateBoxGeometry() {
//     const newGeometry = new THREE.BoxGeometry(
//         cubeData.width,
//         cubeData.height,
//         cubeData.depth,
//         cubeData.widthSegments,
//         cubeData.heightSegments,
//         cubeData.depthSegments
//     )
//     cube.geometry.dispose()
//     cube.geometry = newGeometry
// }

// const sphereData = {
//     radius: 1,
//     widthSegments: 8,
//     heightSegments: 6,
//     phiStart: 0,
//     phiLength: Math.PI * 2,
//     thetaStart: 0,
//     thetaLength: Math.PI,
// }
// const sphereFolder = gui.addFolder('Sphere')
// const spherePropertiesFolder = sphereFolder.addFolder('Properties')
// spherePropertiesFolder.add(sphereData, 'radius', 0.1, 30).onChange(regenerateSphereGeometry)
// spherePropertiesFolder.add(sphereData, 'widthSegments', 1, 32).onChange(regenerateSphereGeometry)
// spherePropertiesFolder.add(sphereData, 'heightSegments', 1, 16).onChange(regenerateSphereGeometry)
// spherePropertiesFolder
//     .add(sphereData, 'phiStart', 0, Math.PI * 2)
//     .onChange(regenerateSphereGeometry)
// spherePropertiesFolder
//     .add(sphereData, 'phiLength', 0, Math.PI * 2)
//     .onChange(regenerateSphereGeometry)
// spherePropertiesFolder.add(sphereData, 'thetaStart', 0, Math.PI).onChange(regenerateSphereGeometry)
// spherePropertiesFolder.add(sphereData, 'thetaLength', 0, Math.PI).onChange(regenerateSphereGeometry)

// function regenerateSphereGeometry() {
//     const newGeometry = new THREE.SphereGeometry(
//         sphereData.radius,
//         sphereData.widthSegments,
//         sphereData.heightSegments,
//         sphereData.phiStart,
//         sphereData.phiLength,
//         sphereData.thetaStart,
//         sphereData.thetaLength
//     )
//     sphere.geometry.dispose()
//     sphere.geometry = newGeometry
// }

// const icosahedronData = {
//     radius: 1,
//     detail: 0,
// }
// const icosahedronFolder = gui.addFolder('Icosahedron')
// const icosahedronPropertiesFolder = icosahedronFolder.addFolder('Properties')
// icosahedronPropertiesFolder
//     .add(icosahedronData, 'radius', 0.1, 10)
//     .onChange(regenerateIcosahedronGeometry)
// icosahedronPropertiesFolder
//     .add(icosahedronData, 'detail', 0, 5)
//     .step(1)
//     .onChange(regenerateIcosahedronGeometry)

// function regenerateIcosahedronGeometry() {
//     const newGeometry = new THREE.IcosahedronGeometry(
//         icosahedronData.radius,
//         icosahedronData.detail
//     )
//     icosahedron.geometry.dispose()
//     icosahedron.geometry = newGeometry
// }

//const debug = document.getElementById('debug1') as HTMLDivElement

function animate() {
    requestAnimationFrame(animate)

    render()

    //debug.innerText = 'Matrix\n' + cube.matrix.elements.toString().replace(/,/g, '\n')

    stats.update()
}

function render() {
    renderer.render(scene, camera)
}

animate()

Final Script

./src/client/client.ts

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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 'three/examples/jsm/libs/dat.gui.module'

const scene = new THREE.Scene()
scene.add(new THREE.AxesHelper(5))

const camera = new THREE.PerspectiveCamera(
    75,
    window.innerWidth / window.innerHeight,
    0.1,
    1000
)
camera.position.x = -2
camera.position.y = 4
camera.position.z = 5

const renderer = new THREE.WebGLRenderer()
renderer.setSize(window.innerWidth, window.innerHeight)
document.body.appendChild(renderer.domElement)

new OrbitControls(camera, renderer.domElement)

const boxGeometry = new THREE.BoxGeometry()
const sphereGeometry = new THREE.SphereGeometry()
const icosahedronGeometry = new THREE.IcosahedronGeometry()

//console.dir(boxGeometry)
const material = new THREE.MeshBasicMaterial({
    color: 0x00ff00,
    wireframe: true,
})

const cube = new THREE.Mesh(boxGeometry, material)
cube.position.x = 5
scene.add(cube)

const sphere = new THREE.Mesh(sphereGeometry, material)
sphere.position.x = -5
scene.add(sphere)

const icosahedron = new THREE.Mesh(icosahedronGeometry, material)
scene.add(icosahedron)

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 cubeFolder = gui.addFolder('Cube')
const cubeRotationFolder = cubeFolder.addFolder('Rotation')
cubeRotationFolder.add(cube.rotation, 'x', 0, Math.PI * 2, 0.01)
cubeRotationFolder.add(cube.rotation, 'y', 0, Math.PI * 2, 0.01)
cubeRotationFolder.add(cube.rotation, 'z', 0, Math.PI * 2, 0.01)
const cubePositionFolder = cubeFolder.addFolder('Position')
cubePositionFolder.add(cube.position, 'x', -10, 10)
cubePositionFolder.add(cube.position, 'y', -10, 10)
cubePositionFolder.add(cube.position, 'z', -10, 10)
const cubeScaleFolder = cubeFolder.addFolder('Scale')
cubeScaleFolder
    .add(cube.scale, 'x', -5, 5, 0.1)
    .onFinishChange(() => console.dir(cube.geometry))
cubeScaleFolder.add(cube.scale, 'y', -5, 5, 0.1)
cubeScaleFolder.add(cube.scale, 'z', -5, 5, 0.1)
cubeFolder.add(cube, 'visible', true)
cubeFolder.open()

const cubeData = {
    width: 1,
    height: 1,
    depth: 1,
    widthSegments: 1,
    heightSegments: 1,
    depthSegments: 1,
}
const cubePropertiesFolder = cubeFolder.addFolder('Properties')
cubePropertiesFolder
    .add(cubeData, 'width', 1, 30)
    .onChange(regenerateBoxGeometry)
    .onFinishChange(() => console.dir(cube.geometry))
cubePropertiesFolder
    .add(cubeData, 'height', 1, 30)
    .onChange(regenerateBoxGeometry)
cubePropertiesFolder
    .add(cubeData, 'depth', 1, 30)
    .onChange(regenerateBoxGeometry)
cubePropertiesFolder
    .add(cubeData, 'widthSegments', 1, 30)
    .onChange(regenerateBoxGeometry)
cubePropertiesFolder
    .add(cubeData, 'heightSegments', 1, 30)
    .onChange(regenerateBoxGeometry)
cubePropertiesFolder
    .add(cubeData, 'depthSegments', 1, 30)
    .onChange(regenerateBoxGeometry)

function regenerateBoxGeometry() {
    const newGeometry = new THREE.BoxGeometry(
        cubeData.width,
        cubeData.height,
        cubeData.depth,
        cubeData.widthSegments,
        cubeData.heightSegments,
        cubeData.depthSegments
    )
    cube.geometry.dispose()
    cube.geometry = newGeometry
}

const sphereData = {
    radius: 1,
    widthSegments: 8,
    heightSegments: 6,
    phiStart: 0,
    phiLength: Math.PI * 2,
    thetaStart: 0,
    thetaLength: Math.PI,
}
const sphereFolder = gui.addFolder('Sphere')
const spherePropertiesFolder = sphereFolder.addFolder('Properties')
spherePropertiesFolder
    .add(sphereData, 'radius', 0.1, 30)
    .onChange(regenerateSphereGeometry)
spherePropertiesFolder
    .add(sphereData, 'widthSegments', 1, 32)
    .onChange(regenerateSphereGeometry)
spherePropertiesFolder
    .add(sphereData, 'heightSegments', 1, 16)
    .onChange(regenerateSphereGeometry)
spherePropertiesFolder
    .add(sphereData, 'phiStart', 0, Math.PI * 2)
    .onChange(regenerateSphereGeometry)
spherePropertiesFolder
    .add(sphereData, 'phiLength', 0, Math.PI * 2)
    .onChange(regenerateSphereGeometry)
spherePropertiesFolder
    .add(sphereData, 'thetaStart', 0, Math.PI)
    .onChange(regenerateSphereGeometry)
spherePropertiesFolder
    .add(sphereData, 'thetaLength', 0, Math.PI)
    .onChange(regenerateSphereGeometry)

function regenerateSphereGeometry() {
    const newGeometry = new THREE.SphereGeometry(
        sphereData.radius,
        sphereData.widthSegments,
        sphereData.heightSegments,
        sphereData.phiStart,
        sphereData.phiLength,
        sphereData.thetaStart,
        sphereData.thetaLength
    )
    sphere.geometry.dispose()
    sphere.geometry = newGeometry
}

const icosahedronData = {
    radius: 1,
    detail: 0,
}
const icosahedronFolder = gui.addFolder('Icosahedron')
const icosahedronPropertiesFolder = icosahedronFolder.addFolder('Properties')
icosahedronPropertiesFolder
    .add(icosahedronData, 'radius', 0.1, 10)
    .onChange(regenerateIcosahedronGeometry)
icosahedronPropertiesFolder
    .add(icosahedronData, 'detail', 0, 5)
    .step(1)
    .onChange(regenerateIcosahedronGeometry)

function regenerateIcosahedronGeometry() {
    const newGeometry = new THREE.IcosahedronGeometry(
        icosahedronData.radius,
        icosahedronData.detail
    )
    icosahedron.geometry.dispose()
    icosahedron.geometry = newGeometry
}

const debug = document.getElementById('debug1') as HTMLDivElement

function animate() {
    requestAnimationFrame(animate)

    render()

    debug.innerText =
        'Matrix\n' + cube.matrix.elements.toString().replace(/,/g, '\n')

    stats.update()
}

function render() {
    renderer.render(scene, camera)
}

animate()

Transformation matrix : Wikipedia

THREE.Matrix4