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webgl2_ubo.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>Verge3D WebGL 2 - Uniform Buffer Objects</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://www.soft8soft.com/verge3d" target="_blank" rel="noopener">Verge3D</a> - Uniform Buffer Objects
</div>
<div id="container"></div>
<script id="vertexShader1" type="x-shader/x-vertex">
uniform ViewData {
mat4 projectionMatrix;
mat4 viewMatrix;
};
uniform mat4 modelMatrix;
uniform mat3 normalMatrix;
in vec3 position;
in vec3 normal;
out vec3 vPositionEye;
out vec3 vNormalEye;
void main() {
vec4 vertexPositionEye = viewMatrix * modelMatrix * vec4(position, 1.0);
vPositionEye = vertexPositionEye.xyz;
vNormalEye = normalMatrix * normal;
gl_Position = projectionMatrix * vertexPositionEye;
}
</script>
<script id="fragmentShader1" type="x-shader/x-fragment">
precision highp float;
uniform LightingData {
vec3 position;
vec3 ambientColor;
vec3 diffuseColor;
vec3 specularColor;
float shininess;
} Light;
uniform vec3 color;
in vec3 vPositionEye;
in vec3 vNormalEye;
out vec4 fragColor;
void main() {
// a very basic lighting equation (Phong reflection model) for testing
vec3 l = normalize(Light.position - vPositionEye);
vec3 n = normalize(vNormalEye);
vec3 e = -normalize(vPositionEye);
vec3 r = normalize(reflect(- l, n));
float diffuseLightWeighting = max(dot(n, l), 0.0);
float specularLightWeighting = max(dot(r, e), 0.0);
specularLightWeighting = pow(specularLightWeighting, Light.shininess);
vec3 lightWeighting = Light.ambientColor +
Light.diffuseColor * diffuseLightWeighting +
Light.specularColor * specularLightWeighting;
fragColor = vec4(color.rgb * lightWeighting.rgb, 1.0);
}
</script>
<script id="vertexShader2" type="x-shader/x-vertex">
layout(std140) uniform ViewData {
mat4 projectionMatrix;
mat4 viewMatrix;
};
uniform mat4 modelMatrix;
uniform mat3 normalMatrix;
in vec3 position;
in vec3 normal;
in vec2 uv;
out vec3 vPositionEye;
out vec3 vNormalEye;
out vec2 vUv;
void main() {
vec4 vertexPositionEye = viewMatrix * modelMatrix * vec4(position, 1.0);
vPositionEye = vertexPositionEye.xyz;
vNormalEye = normalMatrix * normal;
vUv = uv;
gl_Position = projectionMatrix * vertexPositionEye;
}
</script>
<script id="fragmentShader2" type="x-shader/x-fragment">
precision highp float;
uniform sampler2D diffuseMap;
in vec2 vUv;
in vec3 vPositionEye;
in vec3 vNormalEye;
out vec4 fragColor;
uniform LightingData {
vec3 position;
vec3 ambientColor;
vec3 diffuseColor;
vec3 specularColor;
float shininess;
} Light;
void main() {
// a very basic lighting equation (Phong reflection model) for testing
vec3 l = normalize(Light.position - vPositionEye);
vec3 n = normalize(vNormalEye);
vec3 e = -normalize(vPositionEye);
vec3 r = normalize(reflect(- l, n));
float diffuseLightWeighting = max(dot(n, l), 0.0);
float specularLightWeighting = max(dot(r, e), 0.0);
specularLightWeighting = pow(specularLightWeighting, Light.shininess);
vec3 lightWeighting = Light.ambientColor +
Light.diffuseColor * diffuseLightWeighting +
Light.specularColor * specularLightWeighting;
fragColor = vec4(texture(diffuseMap, vUv).rgb * lightWeighting.rgb, 1.0);
}
</script>
<!-- Import maps polyfill -->
<!-- Remove this when import maps will be widely supported -->
<script async src="https://unpkg.com/[email protected]/dist/es-module-shims.js"></script>
<script type="importmap">
{
"imports": {
"v3d": "../build/v3d.module.js",
"v3d/addons/": "./jsm/"
}
}
</script>
<script type="module">
import * as v3d from 'v3d';
import WebGL from 'v3d/addons/capabilities/WebGL.js';
let camera, scene, renderer, clock;
init();
animate();
function init() {
if (WebGL.isWebGL2Available() === false) {
document.body.appendChild(WebGL.getWebGL2ErrorMessage());
return;
}
const container = document.getElementById('container');
camera = new v3d.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 100);
camera.position.set(0, 0, 25);
scene = new v3d.Scene();
camera.lookAt(scene.position);
clock = new v3d.Clock();
// geometry
const geometry1 = new v3d.TetrahedronGeometry();
const geometry2 = new v3d.BoxGeometry();
// texture
const texture = new v3d.TextureLoader().load('textures/crate.gif');
// uniforms groups
// Camera and lighting related data are perfect examples of using UBOs since you have to store these
// data just once. They can be shared across all shader programs.
const cameraUniformsGroup = new v3d.UniformsGroup();
cameraUniformsGroup.setName('ViewData');
cameraUniformsGroup.add(new v3d.Uniform(camera.projectionMatrix)); // projection matrix
cameraUniformsGroup.add(new v3d.Uniform(camera.matrixWorldInverse)); // view matrix
const lightingUniformsGroup = new v3d.UniformsGroup();
lightingUniformsGroup.setName('LightingData');
lightingUniformsGroup.add(new v3d.Uniform(new v3d.Vector3(0, 0, 10))); // light position
lightingUniformsGroup.add(new v3d.Uniform(new v3d.Color(0x333333))); // ambient color
lightingUniformsGroup.add(new v3d.Uniform(new v3d.Color(0xaaaaaa))); // diffuse color
lightingUniformsGroup.add(new v3d.Uniform(new v3d.Color(0xcccccc))); // specular color
lightingUniformsGroup.add(new v3d.Uniform(64)); // shininess
// materials
const material1 = new v3d.RawShaderMaterial({
uniforms: {
modelMatrix: { value: null },
normalMatrix: { value: null },
color: { value: null }
},
vertexShader: document.getElementById('vertexShader1').textContent,
fragmentShader: document.getElementById('fragmentShader1').textContent,
glslVersion: v3d.GLSL3
});
const material2 = new v3d.RawShaderMaterial({
uniforms: {
modelMatrix: { value: null },
diffuseMap: { value: null },
},
vertexShader: document.getElementById('vertexShader2').textContent,
fragmentShader: document.getElementById('fragmentShader2').textContent,
glslVersion: v3d.GLSL3
});
// meshes
for (let i = 0; i < 200; i++) {
let mesh;
if (i % 2 === 0) {
mesh = new v3d.Mesh(geometry1, material1.clone());
mesh.material.uniformsGroups = [cameraUniformsGroup, lightingUniformsGroup];
mesh.material.uniforms.modelMatrix.value = mesh.matrixWorld;
mesh.material.uniforms.normalMatrix.value = mesh.normalMatrix;
mesh.material.uniforms.color.value = new v3d.Color(0xffffff * Math.random());
} else {
mesh = new v3d.Mesh(geometry2, material2.clone());
mesh.material.uniformsGroups = [cameraUniformsGroup, lightingUniformsGroup];
mesh.material.uniforms.modelMatrix.value = mesh.matrixWorld;
mesh.material.uniforms.diffuseMap.value = texture;
}
scene.add(mesh);
const s = 1 + Math.random() * 0.5;
mesh.scale.x = s;
mesh.scale.y = s;
mesh.scale.z = s;
mesh.rotation.x = Math.random() * Math.PI;
mesh.rotation.y = Math.random() * Math.PI;
mesh.rotation.z = Math.random() * Math.PI;
mesh.position.x = Math.random() * 40 - 20;
mesh.position.y = Math.random() * 40 - 20;
mesh.position.z = Math.random() * 20 - 10;
}
//
renderer = new v3d.WebGLRenderer({ antialias: true });
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
container.appendChild(renderer.domElement);
window.addEventListener('resize', onWindowResize, false);
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
//
function animate() {
requestAnimationFrame(animate);
const delta = clock.getDelta();
scene.traverse(function(child) {
if (child.isMesh) {
child.rotation.x += delta * 0.5;
child.rotation.y += delta * 0.3;
}
});
renderer.render(scene, camera);
}
</script>
</body>
</html>