javascript
/
three.js
огледало от https://github.com/tazdij/three.js.git


			
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							<!DOCTYPE html>
<html lang="en">

<head>
	<title>three.js webgl - materials - standard</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="http://threejs.org" target="_blank" rel="noopener">three.js</a> - Geometry Compression Example<br />
	</div>

	<script type="module">

		import * as THREE from '../build/three.module.js';

		import Stats from './jsm/libs/stats.module.js';

		import { OrbitControls } from './jsm/controls/OrbitControls.js';
		import { GeometryCompressionUtils, PackedPhongMaterial } from './jsm/utils/GeometryCompressionUtils.js';
		import { GUI } from './jsm/libs/dat.gui.module.js';

		var statsEnabled = true;

		var container, stats, gui;

		var camera, scene, renderer, controls;

		var lights = [];

		var data = {
			flatShading: false,
			wireframe: true,
			basicEncodeNormal: false,
			octEncodeNormal: false,
			defaultEncodeNormal: false,
			quantizeEncodePosition: false,
			defaultEncodeUV: false,
			lightsRotation: 1
		};


		var radius = 100;
		var detail = 5;
		var uvScale = [];

		// materials
		var lineMaterial = new THREE.LineBasicMaterial({ color: 0xaaaaaa, transparent: true, opacity: 0.5 });
		var meshMaterial = new THREE.MeshPhongMaterial({ color: 0xffffff, emissive: 0x111111, flatShading: data.flatShading });

		var texture = new THREE.TextureLoader().load("textures/uv_grid_opengl.jpg");
		// var texture = new THREE.TextureLoader().load("textures/uv_grid_opengl_8k.jpg");
		// var texture = new THREE.TextureLoader().load("textures/brick_diffuse.jpg");

		texture.wrapS = THREE.RepeatWrapping;
		texture.wrapT = THREE.RepeatWrapping;

		// meshMaterial.map = texture;


		init();
		animate();

		function init() {

			//

			// for (let i = 0; i < 1000000; i++) {
			// 	uvScale.push(Math.random() * 100);
			// }

			container = document.createElement('div');
			document.body.appendChild(container);

			renderer = new THREE.WebGLRenderer({ antialias: true });
			renderer.setPixelRatio(window.devicePixelRatio);
			renderer.setSize(window.innerWidth, window.innerHeight);
			container.appendChild(renderer.domElement);

			//

			scene = new THREE.Scene();

			camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 0.01, 10000000);

			camera.position.x = 3 * radius;
			camera.position.y = 3 * radius;
			camera.position.z = 3 * radius;

			controls = new OrbitControls(camera, renderer.domElement);

			//
			lights[0] = new THREE.PointLight(0xffffff, 1, 0);
			lights[1] = new THREE.PointLight(0xffffff, 1, 0);
			lights[2] = new THREE.PointLight(0xffffff, 1, 0);

			lights[0].position.set(0, 2 * radius, 0);
			lights[1].position.set(2 * radius, - 2 * radius, 2 * radius);
			lights[2].position.set(- 2 * radius, - 2 * radius, - 2 * radius);

			scene.add(lights[0]);
			scene.add(lights[1]);
			scene.add(lights[2]);

			//
			scene.add(new THREE.AxesHelper(radius * 5));

			//
			var ballGeom = newGeometry();

			var ballMesh = new THREE.Mesh(ballGeom, meshMaterial);
			var ballLineSegments = new THREE.LineSegments(ballGeom, lineMaterial);
			ballLineSegments.visible = data.wireframe;

			scene.add(ballLineSegments);
			scene.add(ballMesh);

			//

			gui = new GUI();

			function newGeometry() {
				var geom = new THREE.IcosahedronBufferGeometry(radius, detail);
				// var geom = new THREE.CylinderBufferGeometry( 5, 5, 20, 32 );
				// var geom = new THREE.OctahedronBufferGeometry( radius, detail );
				// var geom = new THREE.BoxBufferGeometry(radius, radius, radius, detail, detail, detail);

				// for (let i = 0; i < geom.attributes.uv.array.length; i += 2) {
				// 	if (i % 13 == 0){
				// 		geom.attributes.uv.array[i] = geom.attributes.uv.array[i] * uvScale[i];
				// 	}
				// }

				return geom;
			}

			function generateGeometry() {

				updateGroupGeometry(
					ballMesh,
					ballLineSegments,
					newGeometry(),
					data);
			}

			function updateMaterial() {
				ballMesh.material = new THREE.MeshPhongMaterial({ color: 0x156289, emissive: 0x072534, flatShading: data.flatShading });
			}

			function updateLineSegments() {
				ballLineSegments.visible = data.wireframe;
			}

			var folder = gui.addFolder('THREE.IcosahedronBufferGeometry');
			folder.open();
			folder.add(data, 'flatShading', false).onChange(updateMaterial);
			folder.add(data, 'wireframe', false).onChange(updateLineSegments);
			folder.add(data, 'basicEncodeNormal', false).onChange(generateGeometry);
			folder.add(data, 'octEncodeNormal', false).onChange(generateGeometry);
			folder.add(data, 'defaultEncodeNormal', false).onChange(generateGeometry);
			folder.add(data, 'quantizeEncodePosition', false).onChange(generateGeometry);
			folder.add(data, 'defaultEncodeUV', false).onChange(generateGeometry);
			folder.add(data, 'lightsRotation', 1, 10, 1);

			scene.add(ballMesh);

			camera.lookAt(ballMesh.position);

			//

			if (statsEnabled) {

				stats = new Stats();
				container.appendChild(stats.dom);

			}

			window.addEventListener('resize', onWindowResize, false);
			window.addEventListener('keydown', (event) => {
				changeLightsPos();
			}, false);

		}

		//

		function onWindowResize() {

			renderer.setSize(window.innerWidth, window.innerHeight);

			camera.aspect = window.innerWidth / window.innerHeight;
			camera.updateProjectionMatrix();

		}

		//
		function changeLightsPos() {
			lights.forEach(light => {
				var direction = light.position.clone();
				direction.applyAxisAngle(new THREE.Vector3(0, 1, 0), data.lightsRotation / 180 * Math.PI);
				light.position.add(direction.sub(light.position));
			});
		}

		//

		function animate() {

			requestAnimationFrame(animate);

			controls.update();
			renderer.render(scene, camera);

			if (statsEnabled) stats.update();

		}

		//

		function updateGroupGeometry(mesh, lineSegments, geometry, data) {

			if (geometry.isGeometry) {

				geometry = new THREE.BufferGeometry().fromGeometry(geometry);

				console.warn('THREE.GeometryBrowser: Converted Geometry to BufferGeometry.');

			}

			lineSegments.geometry.dispose();
			mesh.geometry.dispose();

			lineSegments.geometry = new THREE.WireframeGeometry(geometry);
			mesh.geometry = geometry;
			mesh.material = meshMaterial;

			var method = "";
			if (data.basicEncodeNormal) {
				method = "BASIC";
			} else if (data.octEncodeNormal) {
				method = "OCT";
			} else if (data.defaultEncodeNormal) {
				method = "DEFAULT";
			}

			if (method != "") {
				GeometryCompressionUtils.packNormals(mesh, method);
			}

			if (data.quantizeEncodePosition) {
				GeometryCompressionUtils.packPositions(mesh);
			}

			if (method == "" && !data.quantizeEncodePosition) {
				mesh.material = meshMaterial;
			}

			if (data.defaultEncodeUV) {
				GeometryCompressionUtils.packUvs(mesh);
			}

		}


	</script>

</body>

</html>