You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
192 lines
5.7 KiB
192 lines
5.7 KiB
2 years ago
|
<!-- Licensed under a BSD license. See license.html for license -->
|
||
|
|
<!DOCTYPE html>
|
||
|
|
<html>
|
||
|
|
<head>
|
||
|
|
<meta charset="utf-8">
|
||
|
|
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
|
||
|
|
<title>Three.js - Custom BufferGeometry - Cube</title>
|
||
|
|
<style>
|
||
|
|
html, body {
|
||
|
|
height: 100%;
|
||
|
|
margin: 0;
|
||
|
|
}
|
||
|
|
#c {
|
||
|
|
width: 100%;
|
||
|
|
height: 100%;
|
||
|
|
display: block;
|
||
|
|
}
|
||
|
|
</style>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<canvas id="c"></canvas>
|
||
|
|
</body>
|
||
|
|
<!-- Import maps polyfill -->
|
||
|
|
<!-- Remove this when import maps will be widely supported -->
|
||
|
|
<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
|
||
|
|
|
||
|
|
<script type="importmap">
|
||
|
|
{
|
||
|
|
"imports": {
|
||
|
|
"three": "../../build/three.module.js"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
</script>
|
||
|
|
|
||
|
|
<script type="module">
|
||
|
|
import * as THREE from 'three';
|
||
|
|
|
||
|
|
function main() {
|
||
|
|
const canvas = document.querySelector('#c');
|
||
|
|
const renderer = new THREE.WebGLRenderer({canvas});
|
||
|
|
|
||
|
|
const fov = 75;
|
||
|
|
const aspect = 2; // the canvas default
|
||
|
|
const near = 0.1;
|
||
|
|
const far = 100;
|
||
|
|
const camera = new THREE.PerspectiveCamera(fov, aspect, near, far);
|
||
|
|
camera.position.z = 5;
|
||
|
|
|
||
|
|
const scene = new THREE.Scene();
|
||
|
|
|
||
|
|
{
|
||
|
|
const color = 0xFFFFFF;
|
||
|
|
const intensity = 1;
|
||
|
|
const light = new THREE.DirectionalLight(color, intensity);
|
||
|
|
light.position.set(-1, 2, 4);
|
||
|
|
scene.add(light);
|
||
|
|
}
|
||
|
|
|
||
|
|
// NOT A GOOD EXAMPLE OF HOW TO MAKE A CUBE!
|
||
|
|
// Only trying to make it clear most vertices are unique
|
||
|
|
const vertices = [
|
||
|
|
// front
|
||
|
|
{ pos: [-1, -1, 1], norm: [ 0, 0, 1], uv: [0, 0], },
|
||
|
|
{ pos: [ 1, -1, 1], norm: [ 0, 0, 1], uv: [1, 0], },
|
||
|
|
{ pos: [-1, 1, 1], norm: [ 0, 0, 1], uv: [0, 1], },
|
||
|
|
|
||
|
|
{ pos: [-1, 1, 1], norm: [ 0, 0, 1], uv: [0, 1], },
|
||
|
|
{ pos: [ 1, -1, 1], norm: [ 0, 0, 1], uv: [1, 0], },
|
||
|
|
{ pos: [ 1, 1, 1], norm: [ 0, 0, 1], uv: [1, 1], },
|
||
|
|
// right
|
||
|
|
{ pos: [ 1, -1, 1], norm: [ 1, 0, 0], uv: [0, 0], },
|
||
|
|
{ pos: [ 1, -1, -1], norm: [ 1, 0, 0], uv: [1, 0], },
|
||
|
|
{ pos: [ 1, 1, 1], norm: [ 1, 0, 0], uv: [0, 1], },
|
||
|
|
|
||
|
|
{ pos: [ 1, 1, 1], norm: [ 1, 0, 0], uv: [0, 1], },
|
||
|
|
{ pos: [ 1, -1, -1], norm: [ 1, 0, 0], uv: [1, 0], },
|
||
|
|
{ pos: [ 1, 1, -1], norm: [ 1, 0, 0], uv: [1, 1], },
|
||
|
|
// back
|
||
|
|
{ pos: [ 1, -1, -1], norm: [ 0, 0, -1], uv: [0, 0], },
|
||
|
|
{ pos: [-1, -1, -1], norm: [ 0, 0, -1], uv: [1, 0], },
|
||
|
|
{ pos: [ 1, 1, -1], norm: [ 0, 0, -1], uv: [0, 1], },
|
||
|
|
|
||
|
|
{ pos: [ 1, 1, -1], norm: [ 0, 0, -1], uv: [0, 1], },
|
||
|
|
{ pos: [-1, -1, -1], norm: [ 0, 0, -1], uv: [1, 0], },
|
||
|
|
{ pos: [-1, 1, -1], norm: [ 0, 0, -1], uv: [1, 1], },
|
||
|
|
// left
|
||
|
|
{ pos: [-1, -1, -1], norm: [-1, 0, 0], uv: [0, 0], },
|
||
|
|
{ pos: [-1, -1, 1], norm: [-1, 0, 0], uv: [1, 0], },
|
||
|
|
{ pos: [-1, 1, -1], norm: [-1, 0, 0], uv: [0, 1], },
|
||
|
|
|
||
|
|
{ pos: [-1, 1, -1], norm: [-1, 0, 0], uv: [0, 1], },
|
||
|
|
{ pos: [-1, -1, 1], norm: [-1, 0, 0], uv: [1, 0], },
|
||
|
|
{ pos: [-1, 1, 1], norm: [-1, 0, 0], uv: [1, 1], },
|
||
|
|
// top
|
||
|
|
{ pos: [ 1, 1, -1], norm: [ 0, 1, 0], uv: [0, 0], },
|
||
|
|
{ pos: [-1, 1, -1], norm: [ 0, 1, 0], uv: [1, 0], },
|
||
|
|
{ pos: [ 1, 1, 1], norm: [ 0, 1, 0], uv: [0, 1], },
|
||
|
|
|
||
|
|
{ pos: [ 1, 1, 1], norm: [ 0, 1, 0], uv: [0, 1], },
|
||
|
|
{ pos: [-1, 1, -1], norm: [ 0, 1, 0], uv: [1, 0], },
|
||
|
|
{ pos: [-1, 1, 1], norm: [ 0, 1, 0], uv: [1, 1], },
|
||
|
|
// bottom
|
||
|
|
{ pos: [ 1, -1, 1], norm: [ 0, -1, 0], uv: [0, 0], },
|
||
|
|
{ pos: [-1, -1, 1], norm: [ 0, -1, 0], uv: [1, 0], },
|
||
|
|
{ pos: [ 1, -1, -1], norm: [ 0, -1, 0], uv: [0, 1], },
|
||
|
|
|
||
|
|
{ pos: [ 1, -1, -1], norm: [ 0, -1, 0], uv: [0, 1], },
|
||
|
|
{ pos: [-1, -1, 1], norm: [ 0, -1, 0], uv: [1, 0], },
|
||
|
|
{ pos: [-1, -1, -1], norm: [ 0, -1, 0], uv: [1, 1], },
|
||
|
|
];
|
||
|
|
const positions = [];
|
||
|
|
const normals = [];
|
||
|
|
const uvs = [];
|
||
|
|
for (const vertex of vertices) {
|
||
|
|
positions.push(...vertex.pos);
|
||
|
|
normals.push(...vertex.norm);
|
||
|
|
uvs.push(...vertex.uv);
|
||
|
|
}
|
||
|
|
|
||
|
|
const geometry = new THREE.BufferGeometry();
|
||
|
|
const positionNumComponents = 3;
|
||
|
|
const normalNumComponents = 3;
|
||
|
|
const uvNumComponents = 2;
|
||
|
|
geometry.setAttribute(
|
||
|
|
'position',
|
||
|
|
new THREE.BufferAttribute(new Float32Array(positions), positionNumComponents));
|
||
|
|
geometry.setAttribute(
|
||
|
|
'normal',
|
||
|
|
new THREE.BufferAttribute(new Float32Array(normals), normalNumComponents));
|
||
|
|
geometry.setAttribute(
|
||
|
|
'uv',
|
||
|
|
new THREE.BufferAttribute(new Float32Array(uvs), uvNumComponents));
|
||
|
|
|
||
|
|
const loader = new THREE.TextureLoader();
|
||
|
|
const texture = loader.load('resources/images/star.png');
|
||
|
|
|
||
|
|
function makeInstance(geometry, color, x) {
|
||
|
|
const material = new THREE.MeshPhongMaterial({color, map: texture});
|
||
|
|
|
||
|
|
const cube = new THREE.Mesh(geometry, material);
|
||
|
|
scene.add(cube);
|
||
|
|
|
||
|
|
cube.position.x = x;
|
||
|
|
return cube;
|
||
|
|
}
|
||
|
|
|
||
|
|
const cubes = [
|
||
|
|
makeInstance(geometry, 0x88FF88, 0),
|
||
|
|
makeInstance(geometry, 0x8888FF, -4),
|
||
|
|
makeInstance(geometry, 0xFF8888, 4),
|
||
|
|
];
|
||
|
|
|
||
|
|
function resizeRendererToDisplaySize(renderer) {
|
||
|
|
const canvas = renderer.domElement;
|
||
|
|
const width = canvas.clientWidth;
|
||
|
|
const height = canvas.clientHeight;
|
||
|
|
const needResize = canvas.width !== width || canvas.height !== height;
|
||
|
|
if (needResize) {
|
||
|
|
renderer.setSize(width, height, false);
|
||
|
|
}
|
||
|
|
return needResize;
|
||
|
|
}
|
||
|
|
|
||
|
|
function render(time) {
|
||
|
|
time *= 0.001;
|
||
|
|
|
||
|
|
if (resizeRendererToDisplaySize(renderer)) {
|
||
|
|
const canvas = renderer.domElement;
|
||
|
|
camera.aspect = canvas.clientWidth / canvas.clientHeight;
|
||
|
|
camera.updateProjectionMatrix();
|
||
|
|
}
|
||
|
|
|
||
|
|
cubes.forEach((cube, ndx) => {
|
||
|
|
const speed = 1 + ndx * .1;
|
||
|
|
const rot = time * speed;
|
||
|
|
cube.rotation.x = rot;
|
||
|
|
cube.rotation.y = rot;
|
||
|
|
});
|
||
|
|
|
||
|
|
renderer.render(scene, camera);
|
||
|
|
|
||
|
|
requestAnimationFrame(render);
|
||
|
|
}
|
||
|
|
|
||
|
|
requestAnimationFrame(render);
|
||
|
|
}
|
||
|
|
|
||
|
|
main();
|
||
|
|
</script>
|
||
|
|
</html>
|
||
|
|
|