mirror of
https://github.com/Doodle3D/Doodle3D-Slicer.git
synced 2024-11-19 12:27:56 +01:00
173 lines
4.0 KiB
HTML
173 lines
4.0 KiB
HTML
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<!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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<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.min.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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#extension GL_OES_standard_derivatives : enable
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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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var meshTris, meshLines, meshMixed;
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init();
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animate();
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function init() {
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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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var size = 150;
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var geometryLines = new THREE.BoxGeometry( size, size, size );
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var geometryTris = new THREE.BoxGeometry( size, size, size );
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// wireframe using gl.LINES
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var materialLines = new THREE.MeshBasicMaterial( { wireframe: true } );
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meshLines = new THREE.Mesh( geometryLines, materialLines );
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meshLines.position.x = -150;
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scene.add( meshLines );
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//
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var vertexShader = document.getElementById( 'vertexShader' ).textContent;
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var fragmentShader = document.getElementById( 'fragmentShader' ).textContent;
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// wireframe using gl.TRIANGLES (interpreted as triangles)
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var attributesTris = { center: { type: 'v3', boundTo: 'faceVertices', value: [] } };
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var valuesTris = attributesTris.center.value;
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setupAttributes( geometryTris, valuesTris );
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var materialTris = new THREE.ShaderMaterial( { uniforms: {}, attributes: attributesTris, vertexShader: vertexShader, fragmentShader: fragmentShader } );
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meshTris = new THREE.Mesh( geometryTris, materialTris );
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meshTris.position.x = 150;
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scene.add( meshTris );
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// wireframe using gl.TRIANGLES (mixed triangles and quads)
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var mixedGeometry = new THREE.SphereGeometry( size / 2, 32, 16 );
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var attributesMixed = { center: { type: 'v3', boundTo: 'faceVertices', value: [] } };
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var valuesMixed = attributesMixed.center.value;
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setupAttributes( mixedGeometry, valuesMixed );
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var materialMixed = new THREE.ShaderMaterial( { uniforms: {}, attributes: attributesMixed, vertexShader: vertexShader, fragmentShader: fragmentShader } );
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meshMixed = new THREE.Mesh( mixedGeometry, materialMixed );
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meshMixed.position.x = -150;
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scene.add( meshMixed );
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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, values ) {
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for( var f = 0; f < geometry.faces.length; f ++ ) {
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values[ f ] = [ new THREE.Vector3( 1, 0, 0 ), new THREE.Vector3( 0, 1, 0 ), new THREE.Vector3( 0, 0, 1 ) ];
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}
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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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meshLines.rotation.x += 0.005;
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meshLines.rotation.y += 0.01;
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meshTris.rotation.x += 0.005;
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meshTris.rotation.y += 0.01;
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if ( meshMixed ) {
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meshMixed.rotation.x += 0.005;
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meshMixed.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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