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webgl_materials_texture_rotation.html
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webgl_materials_texture_rotation.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>Verge3D webgl - materials - texture - rotation</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> webgl - texture rotation
</div>
<!-- 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": {
"v3d": "../build/v3d.module.js",
"v3d/addons/": "./jsm/"
}
}
</script>
<script type="module">
import * as v3d from 'v3d';
import { GUI } from 'v3d/addons/libs/lil-gui.module.min.js';
import { OrbitControls } from 'v3d/addons/controls/OrbitControls.js';
let mesh, renderer, scene, camera;
let gui;
const API = {
offsetX: 0,
offsetY: 0,
repeatX: 0.25,
repeatY: 0.25,
rotation: Math.PI / 4, // positive is counter-clockwise
centerX: 0.5,
centerY: 0.5
};
init();
function init() {
renderer = new v3d.WebGLRenderer();
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);
scene = new v3d.Scene();
camera = new v3d.PerspectiveCamera(40, window.innerWidth / window.innerHeight, 1, 1000);
camera.position.set(10, 15, 25);
scene.add(camera);
const controls = new OrbitControls(camera, renderer.domElement);
controls.addEventListener('change', render);
controls.minDistance = 20;
controls.maxDistance = 50;
controls.maxPolarAngle = Math.PI / 2;
const geometry = new v3d.BoxGeometry(10, 10, 10);
new v3d.TextureLoader().load('textures/uv_grid_opengl.jpg', function(texture) {
texture.wrapS = texture.wrapT = v3d.RepeatWrapping;
texture.anisotropy = renderer.capabilities.getMaxAnisotropy();
//texture.matrixAutoUpdate = false; // default true; set to false to update texture.matrix manually
const material = new v3d.MeshBasicMaterial({ map: texture });
mesh = new v3d.Mesh(geometry, material);
scene.add(mesh);
updateUvTransform();
initGui();
render();
});
window.addEventListener('resize', onWindowResize);
}
function render() {
renderer.render(scene, camera);
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
render();
}
function updateUvTransform() {
const texture = mesh.material.map;
if (texture.matrixAutoUpdate === true) {
texture.offset.set(API.offsetX, API.offsetY);
texture.repeat.set(API.repeatX, API.repeatY);
texture.center.set(API.centerX, API.centerY);
texture.rotation = API.rotation; // rotation is around [0.5, 0.5]
} else {
// one way...
//texture.matrix.setUvTransform(API.offsetX, API.offsetY, API.repeatX, API.repeatY, API.rotation, API.centerX, API.centerY);
// another way...
texture.matrix
.identity()
.translate(- API.centerX, - API.centerY)
.rotate(API.rotation) // I don't understand how rotation can preceed scale, but it seems to be required...
.scale(API.repeatX, API.repeatY)
.translate(API.centerX, API.centerY)
.translate(API.offsetX, API.offsetY);
}
render();
}
function initGui() {
gui = new GUI();
gui.add(API, 'offsetX', 0.0, 1.0).name('offset.x').onChange(updateUvTransform);
gui.add(API, 'offsetY', 0.0, 1.0).name('offset.y').onChange(updateUvTransform);
gui.add(API, 'repeatX', 0.25, 2.0).name('repeat.x').onChange(updateUvTransform);
gui.add(API, 'repeatY', 0.25, 2.0).name('repeat.y').onChange(updateUvTransform);
gui.add(API, 'rotation', -2.0, 2.0).name('rotation').onChange(updateUvTransform);
gui.add(API, 'centerX', 0.0, 1.0).name('center.x').onChange(updateUvTransform);
gui.add(API, 'centerY', 0.0, 1.0).name('center.y').onChange(updateUvTransform);
}
</script>
</body>
</html>