mirror of
https://github.com/Doodle3D/Doodle3D-Slicer.git
synced 2024-12-24 12:03:48 +01:00
380 lines
8.7 KiB
HTML
380 lines
8.7 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 - vector - text</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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font-family: Monospace;
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background-color: #f0f0f0;
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margin: 0px;
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overflow: hidden;
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}
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#info {
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position: absolute;
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top: 10px;
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width: 100%;
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text-align: center;
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}
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</style>
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</head>
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<body>
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<div id="info">
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<a href="http://threejs.org" target="_blank">three.js</a> webgl - Resolution-Independent Vector Fonts. <a href="https://github.com/mrdoob/three.js/issues/4746">info</a>.
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</div>
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<script src="../build/three.min.js"></script>
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<script src="./js/controls/OrbitControls.js"></script>
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<script src="js/libs/stats.min.js"></script>
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<!-- load the font file from canvas-text -->
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<script src="fonts/helvetiker_regular.typeface.js"></script>
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<script type="x-shader/x-fragment" id="fs">
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varying vec2 vUv;
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varying float flip;
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uniform vec3 color;
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float inCurve(vec2 uv) {
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return uv.x * uv.x - uv.y;
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}
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float delta = 0.1;
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void main() {
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float x = inCurve(vUv);
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if (x * flip > 0.) discard;
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gl_FragColor = vec4(color, 1.);
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}
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</script>
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<script type="x-shader/x-vertex" id="vs">
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varying vec2 vUv;
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attribute float invert;
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varying float flip;
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void main() {
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vUv = uv;
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flip = invert;
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vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );
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gl_Position = projectionMatrix * mvPosition;
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}
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</script>
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<script>
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var stats;
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var camera, scene, renderer, controls;
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var group, text;
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var t = false;
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function toggle() {
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if ( t ) {
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text2.visible = 0;
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text1.visible = 1;
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} else {
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text2.visible = 1;
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text1.visible = 0;
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}
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t = !t;
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}
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init();
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animate();
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function init() {
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camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 1000 );
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camera.position.set( 0, 100, 500 );
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controls = new THREE.OrbitControls( camera );
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controls.center.set( 0, 100, 0 );
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scene = new THREE.Scene();
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var theText = "&"; // i % & j b 8
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var options = {
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size: 180,
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height: 20,
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curveSegments: 2,
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font: "helvetiker",
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bevelEnabled: false
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};
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group = new THREE.Group();
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scene.add( group );
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var textMaterial = new THREE.MeshBasicMaterial( { color: new THREE.Color(0, 0, 1 ), overdraw: 0.5, wireframe: true, side: THREE.DoubleSide } );
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textShapes = THREE.FontUtils.generateShapes( theText, options );
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text3d = new THREE.ShapeGeometry( textShapes );
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text3d.computeBoundingBox();
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var centerOffset = -0.5 * ( text3d.boundingBox.max.x - text3d.boundingBox.min.x );
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text = new THREE.Mesh( text3d, textMaterial );
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text.position.x = centerOffset - 150;
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group.add( text );
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//
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vA = new THREE.Vector2();
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vB = new THREE.Vector2();
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vDot = new THREE.Vector2();
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function processShape(path, reverse) {
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var pts = []; // bigger area (convex hull)
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var pts2 = []; // smaller area (full solid shapes)
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var beziers = []; // quad bezier points
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var invert = [];
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var z;
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var wind;
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pts.push( path[0].getPoint(0) );
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pts2.push( path[0].getPoint(0) );
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for (var i=0; i < path.length; i++) {
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curve = path[i];
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if (curve instanceof THREE.LineCurve) {
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pts.push( curve.v2 );
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pts2.push( curve.v2 );
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} else if (curve instanceof THREE.QuadraticBezierCurve) {
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vA = vA.subVectors( curve.v1, curve.v0 ); // .normalize()
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vB = vB.subVectors( curve.v2, curve.v1 );
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z = vA.x * vB.y - vA.y * vB.x; // z component of cross Production
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wind = z < 0; // clockwise/anticlock wind
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// if (reverse) wind = !wind;
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// console.log(z, wind , wind ? 'clockwise' : 'anti');
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if (wind) {
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pts.push( curve.v1 );
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pts.push( curve.v2 );
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pts2.push( curve.v2 );
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} else {
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pts.push( curve.v2 );
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pts2.push( curve.v1 );
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pts2.push( curve.v2 );
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}
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var flip = wind ? 1 : -1;
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// if (reverse) flip *= -1;
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invert.push(flip, flip, flip);
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beziers.push( curve.v0, curve.v1, curve.v2);
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}
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}
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return {
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pts: pts,
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pts2: pts2,
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beziers: beziers,
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invert: invert
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};
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}
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var subshape;
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var convexhullShapeGroup = [];
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var solidShapeGroup = [];
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var beziers = [], invert = [];
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for (var s=0;s<textShapes.length;s++) {
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subshape = textShapes[s];
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var process = processShape(subshape.curves);
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pts = process.pts;
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pts2 = process.pts2;
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beziers = beziers.concat(process.beziers);
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invert = invert.concat(process.invert);
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convexhullShape = new THREE.Shape( pts );
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solidShape = new THREE.Shape( pts2 );
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convexhullShapeGroup.push( convexhullShape );
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solidShapeGroup.push( solidShape );
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for (var i=0; i<subshape.holes.length;i++) {
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hole = subshape.holes[i];
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// console.log('hole', hole);
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process = processShape(hole.curves, true);
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pts = process.pts;
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pts2 = process.pts2;
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beziers = beziers.concat(process.beziers);
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invert = invert.concat(process.invert);
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convexhullShape.holes.push(new THREE.Shape(pts));
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solidShape.holes.push(new THREE.Shape(pts2));
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}
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} // end of subshape
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bezierGeometry = new THREE.Geometry();
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for (var i=0;i<beziers.length;i++) {
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p = beziers[i];
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bezierGeometry.vertices.push( new THREE.Vector3(p.x, p.y, 0) );
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}
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for (i=0;i<beziers.length;i+=3) {
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bezierGeometry.faces.push( new THREE.Face3(i, i+1, i+2) );
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bezierGeometry.faceVertexUvs[0].push( [
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new THREE.Vector2(0, 0),
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new THREE.Vector2(0.5, 0),
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new THREE.Vector2(1, 1)
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] );
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}
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text3d = new THREE.ShapeGeometry( convexhullShapeGroup );
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text3d.computeBoundingBox();
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var centerOffset = -0.5 * ( text3d.boundingBox.max.x - text3d.boundingBox.min.x );
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text1 = new THREE.Mesh( text3d, textMaterial );
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text1.position.x = centerOffset + 150;
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group.add( text1 );
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text3d = new THREE.ShapeGeometry( solidShapeGroup );
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text3d.computeBoundingBox();
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var centerOffset = -0.5 * ( text3d.boundingBox.max.x - text3d.boundingBox.min.x );
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text2 = new THREE.Mesh( text3d, new THREE.MeshBasicMaterial( { color: new THREE.Color(1, 0, 0 ), side: THREE.DoubleSide, wireframe: true } ) );
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text2.position.x = centerOffset + 150;
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group.add( text2 );
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//
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bezierGeometry.computeBoundingBox();
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bezierGeometry.computeFaceNormals();
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bezierGeometry.computeVertexNormals();
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//
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var uniforms = {
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color: { type: 'c', value: new THREE.Color(0.45 * 0xffffff) }
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};
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var vertexShader = document.getElementById( 'vs' ).textContent;
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var fragmentShader = document.getElementById( 'fs' ).textContent;
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newMaterial = new THREE.ShaderMaterial({
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attributes: { invert: { type: 'f', value: invert } },
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uniforms: uniforms,
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vertexShader: vertexShader,
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fragmentShader: fragmentShader,
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side: THREE.DoubleSide
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});
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text = new THREE.Mesh( bezierGeometry, newMaterial );
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text.position.x = centerOffset;
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text.position.y = 0;
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text.position.z = 0;
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text.rotation.x = 0;
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text.rotation.y = Math.PI * 2;
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group.add( text );
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//
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text3d = new THREE.ShapeGeometry( solidShapeGroup );
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text3d.computeBoundingBox();
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text = new THREE.Mesh( text3d, new THREE.MeshBasicMaterial( { color: 0.45 * 0xffffff, side: THREE.DoubleSide } ) );
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text.position.x = centerOffset;
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text.position.y = 0;
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text.position.z = 0;
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text.rotation.x = 0;
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text.rotation.y = Math.PI * 2;
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group.add( text );
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//
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renderer = new THREE.WebGLRenderer( { antialias: true } );
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renderer.setClearColor( 0xf0f0f0 );
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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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stats = new Stats();
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stats.domElement.style.position = 'absolute';
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stats.domElement.style.top = '0px';
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document.body.appendChild( stats.domElement );
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document.addEventListener( 'mousedown', toggle, false );
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window.addEventListener( 'resize', onWindowResize, false );
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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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//
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function animate() {
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requestAnimationFrame( animate );
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render();
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stats.update();
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}
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function render() {
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controls.update();
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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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