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.
173 lines
4.1 KiB
173 lines
4.1 KiB
2 years ago
|
<!DOCTYPE html>
|
||
|
|
<html lang="en">
|
||
|
|
<head>
|
||
|
|
<title>three.js WebGL 2 - buffergeometry - attributes - none</title>
|
||
|
|
<meta charset="utf-8">
|
||
|
|
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
|
||
|
|
<link type="text/css" rel="stylesheet" href="main.css">
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
|
||
|
|
<div id="info"><a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> WebGL 2 - buffergeometry - attributes - none</div>
|
||
|
|
|
||
|
|
<script id="vertexShader" type="x-shader/x-vertex">
|
||
|
|
|
||
|
|
uniform mat4 modelViewMatrix;
|
||
|
|
uniform mat4 projectionMatrix;
|
||
|
|
|
||
|
|
uniform float seed;
|
||
|
|
|
||
|
|
const uint ieeeMantissa = 0x007FFFFFu;
|
||
|
|
const uint ieeeOne = 0x3F800000u;
|
||
|
|
|
||
|
|
uint hash(uint x) {
|
||
|
|
x += ( x << 10u );
|
||
|
|
x ^= ( x >> 6u );
|
||
|
|
x += ( x << 3u );
|
||
|
|
x ^= ( x >> 11u );
|
||
|
|
x += ( x << 15u );
|
||
|
|
return x;
|
||
|
|
}
|
||
|
|
|
||
|
|
uint hash(uvec2 v) { return hash( v.x ^ hash(v.y) ); }
|
||
|
|
|
||
|
|
float hashNoise(vec2 xy) {
|
||
|
|
uint m = hash(floatBitsToUint(xy));
|
||
|
|
|
||
|
|
m &= ieeeMantissa;
|
||
|
|
m |= ieeeOne;
|
||
|
|
|
||
|
|
return uintBitsToFloat( m ) - 1.0;
|
||
|
|
}
|
||
|
|
|
||
|
|
float pseudoRandom(float lower, float delta, in vec2 xy) {
|
||
|
|
return lower + delta*hashNoise(xy);
|
||
|
|
}
|
||
|
|
|
||
|
|
vec3 pseudoRandomVec3(float lower, float upper, int index) {
|
||
|
|
float delta = upper - lower;
|
||
|
|
float x = pseudoRandom(lower, delta, vec2(index, 0));
|
||
|
|
float y = pseudoRandom(lower, delta, vec2(index, 1));
|
||
|
|
float z = pseudoRandom(lower, delta, vec2(index, 2));
|
||
|
|
return vec3(x, y, z);
|
||
|
|
}
|
||
|
|
|
||
|
|
out vec3 vColor;
|
||
|
|
|
||
|
|
void main() {
|
||
|
|
|
||
|
|
const float scale = 1.0/64.0;
|
||
|
|
vec3 position = pseudoRandomVec3(-1.0, +1.0, gl_VertexID/3) + scale * pseudoRandomVec3(-1.0, +1.0, gl_VertexID);
|
||
|
|
vec3 color = pseudoRandomVec3(0.25, 1.0, gl_VertexID/3);
|
||
|
|
gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.0 );
|
||
|
|
vColor = color;
|
||
|
|
|
||
|
|
}
|
||
|
|
</script>
|
||
|
|
|
||
|
|
<script id="fragmentShader" type="x-shader/x-fragment">
|
||
|
|
|
||
|
|
precision mediump float;
|
||
|
|
|
||
|
|
in vec3 vColor;
|
||
|
|
|
||
|
|
out vec4 fColor;
|
||
|
|
|
||
|
|
void main() {
|
||
|
|
|
||
|
|
fColor = vec4(vColor, 1);
|
||
|
|
|
||
|
|
}
|
||
|
|
</script>
|
||
|
|
|
||
|
|
<!-- 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",
|
||
|
|
"three/addons/": "./jsm/"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
</script>
|
||
|
|
|
||
|
|
<script type="module">
|
||
|
|
|
||
|
|
import * as THREE from 'three';
|
||
|
|
|
||
|
|
import WebGL from 'three/addons/capabilities/WebGL.js';
|
||
|
|
|
||
|
|
if ( WebGL.isWebGL2Available() === false ) {
|
||
|
|
|
||
|
|
document.body.appendChild( WebGL.getWebGL2ErrorMessage() );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
let camera, scene, renderer, mesh;
|
||
|
|
|
||
|
|
init();
|
||
|
|
animate();
|
||
|
|
|
||
|
|
function init() {
|
||
|
|
|
||
|
|
camera = new THREE.PerspectiveCamera( 27, window.innerWidth / window.innerHeight, 1, 3500 );
|
||
|
|
camera.position.z = 4;
|
||
|
|
|
||
|
|
scene = new THREE.Scene();
|
||
|
|
scene.background = new THREE.Color( 0x050505 );
|
||
|
|
scene.fog = new THREE.Fog( 0x050505, 2000, 3500 );
|
||
|
|
|
||
|
|
// geometry
|
||
|
|
|
||
|
|
const triangleCount = 10000;
|
||
|
|
const vertexCountPerTriangle = 3;
|
||
|
|
const vertexCount = triangleCount * vertexCountPerTriangle;
|
||
|
|
|
||
|
|
const geometry = new THREE.BufferGeometry();
|
||
|
|
geometry.setDrawRange( 0, vertexCount );
|
||
|
|
|
||
|
|
// material
|
||
|
|
|
||
|
|
const material = new THREE.RawShaderMaterial( {
|
||
|
|
uniforms: {
|
||
|
|
seed: { value: 42 },
|
||
|
|
},
|
||
|
|
vertexShader: document.getElementById( 'vertexShader' ).textContent,
|
||
|
|
fragmentShader: document.getElementById( 'fragmentShader' ).textContent,
|
||
|
|
side: THREE.DoubleSide,
|
||
|
|
glslVersion: THREE.GLSL3
|
||
|
|
} );
|
||
|
|
|
||
|
|
// mesh
|
||
|
|
|
||
|
|
mesh = new THREE.Mesh( geometry, material );
|
||
|
|
mesh.frustumCulled = false;
|
||
|
|
scene.add( mesh );
|
||
|
|
|
||
|
|
// renderer
|
||
|
|
|
||
|
|
renderer = new THREE.WebGLRenderer( { antialias: true } );
|
||
|
|
renderer.setPixelRatio( window.devicePixelRatio );
|
||
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
||
|
|
document.body.appendChild( renderer.domElement );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function animate( time ) {
|
||
|
|
|
||
|
|
requestAnimationFrame( animate );
|
||
|
|
|
||
|
|
mesh.rotation.x = time / 1000.0 * 0.25;
|
||
|
|
mesh.rotation.y = time / 1000.0 * 0.50;
|
||
|
|
|
||
|
|
renderer.render( scene, camera );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
</script>
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|