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183 lines
3.9 KiB
183 lines
3.9 KiB
<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js webgl - materials - wireframe</title>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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<style>
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body {
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margin: 0px;
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background-color: #000000;
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overflow: hidden;
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}
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</style>
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</head>
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<body>
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<script src="../build/three.js"></script>
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<script type="x-shader/x-vertex" id="vertexShader">
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attribute vec3 center;
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varying vec3 vCenter;
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void main() {
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vCenter = center;
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gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
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}
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</script>
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<script type="x-shader/x-fragment" id="fragmentShader">
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varying vec3 vCenter;
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float edgeFactorTri() {
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vec3 d = fwidth( vCenter.xyz );
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vec3 a3 = smoothstep( vec3( 0.0 ), d * 1.5, vCenter.xyz );
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return min( min( a3.x, a3.y ), a3.z );
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}
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void main() {
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gl_FragColor.rgb = mix( vec3( 1.0 ), vec3( 0.2 ), edgeFactorTri() );
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gl_FragColor.a = 1.0;
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}
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</script>
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<script>
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var camera, scene, renderer;
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init();
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animate();
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function init() {
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var geometry, material, mesh;
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var size = 150;
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camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 2000 );
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camera.position.z = 800;
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scene = new THREE.Scene();
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//
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geometry = new THREE.BoxBufferGeometry( size, size, size );
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material = new THREE.MeshBasicMaterial( { wireframe: true } );
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mesh = new THREE.Mesh( geometry, material );
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mesh.position.x = - 150;
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scene.add( mesh );
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//
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geometry = new THREE.BoxBufferGeometry( size, size, size );
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geometry = geometry.toNonIndexed();
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setupAttributes( geometry );
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material = new THREE.ShaderMaterial( {
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uniforms: {},
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vertexShader: document.getElementById( 'vertexShader' ).textContent,
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fragmentShader: document.getElementById( 'fragmentShader' ).textContent
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} );
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material.extensions.derivatives = true;
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mesh = new THREE.Mesh( geometry, material );
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mesh.position.x = 150;
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scene.add( mesh );
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//
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geometry = new THREE.SphereBufferGeometry( size / 2, 32, 16 );
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geometry = geometry.toNonIndexed();
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setupAttributes( geometry );
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material = new THREE.ShaderMaterial( {
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uniforms: {},
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vertexShader: document.getElementById( 'vertexShader' ).textContent,
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fragmentShader: document.getElementById( 'fragmentShader' ).textContent
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} );
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material.extensions.derivatives = true;
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mesh = new THREE.Mesh( geometry, material );
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mesh.position.x = - 150;
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scene.add( mesh );
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// renderer
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renderer = new THREE.WebGLRenderer( { antialias: true } );
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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document.body.appendChild( renderer.domElement );
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// events
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window.addEventListener( 'resize', onWindowResize, false );
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}
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function setupAttributes( geometry ) {
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// TODO: Bring back quads
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var vectors = [
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new THREE.Vector3( 1, 0, 0 ),
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new THREE.Vector3( 0, 1, 0 ),
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new THREE.Vector3( 0, 0, 1 )
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];
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var position = geometry.attributes.position;
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var centers = new Float32Array( position.count * 3 );
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for ( var i = 0, l = position.count; i < l; i ++ ) {
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vectors[ i % 3 ].toArray( centers, i * 3 );
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}
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geometry.addAttribute( 'center', new THREE.BufferAttribute( centers, 3 ) );
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}
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function onWindowResize() {
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camera.aspect = window.innerWidth / window.innerHeight;
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camera.updateProjectionMatrix();
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renderer.setSize( window.innerWidth, window.innerHeight );
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}
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function animate() {
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requestAnimationFrame( animate );
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for ( var i = 0; i < scene.children.length; i ++ ) {
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var object = scene.children[ i ];
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object.rotation.x += 0.005;
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object.rotation.y += 0.01;
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}
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renderer.render( scene, camera );
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}
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</script>
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</body>
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</html>
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