428 lines
13 KiB
JavaScript
428 lines
13 KiB
JavaScript
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/**
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* dat.globe Javascript WebGL Globe Toolkit
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* http://dataarts.github.com/dat.globe
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*
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* Copyright 2011 Data Arts Team, Google Creative Lab
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*
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* Licensed under the Apache License, Version 2.0 (the 'License');
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*/
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var DAT = DAT || {};
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DAT.Globe = function(container, colorFn) {
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colorFn = colorFn || function(x) {
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var c = new THREE.Color();
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c.setHSV( ( 0.6 - ( x * 0.5 ) ), 1.0, 1.0 );
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return c;
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};
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var Shaders = {
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'earth' : {
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uniforms: {
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'texture': { type: 't', value: 0, texture: null }
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},
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vertexShader: [
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'varying vec3 vNormal;',
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'varying vec2 vUv;',
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'void main() {',
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'gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );',
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'vNormal = normalize( normalMatrix * normal );',
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'vUv = uv;',
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'}'
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].join('\n'),
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fragmentShader: [
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'uniform sampler2D texture;',
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'varying vec3 vNormal;',
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'varying vec2 vUv;',
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'void main() {',
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'vec3 diffuse = texture2D( texture, vUv ).xyz;',
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'float intensity = 1.05 - dot( vNormal, vec3( 0.0, 0.0, 1.0 ) );',
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'vec3 atmosphere = vec3( 1.0, 1.0, 1.0 ) * pow( intensity, 3.0 );',
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'gl_FragColor = vec4( diffuse + atmosphere, 1.0 );',
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'}'
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].join('\n')
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},
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'atmosphere' : {
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uniforms: {},
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vertexShader: [
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'varying vec3 vNormal;',
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'void main() {',
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'vNormal = normalize( normalMatrix * normal );',
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'gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );',
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'}'
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].join('\n'),
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fragmentShader: [
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'varying vec3 vNormal;',
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'void main() {',
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'float intensity = pow( 0.8 - dot( vNormal, vec3( 0, 0, 1.0 ) ), 12.0 ) * 0.7;',
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'gl_FragColor = vec4( 0.55 + 0.36*intensity, 0.83 + 0.14*intensity, 0.95 + 0.04 * intensity, 1.0 * intensity ) ;',
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'}'
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].join('\n')
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}
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};
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var camera, scene, sceneAtmosphere, renderer, w, h;
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var vector, mesh, atmosphere, point;
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var overRenderer;
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/*custom change: the 'imgDir' attribute control the path of the globle's texture*/
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var imgDir = './images/';
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var curZoomSpeed = 0;
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var zoomSpeed = 50;
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var mouse = { x: 0, y: 0 }, mouseOnDown = { x: 0, y: 0 };
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var rotation = { x: 0, y: 0 },
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target = { x: Math.PI*3/2, y: Math.PI / 6.0 },
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targetOnDown = { x: 0, y: 0 };
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var distance = 100000, distanceTarget = 100000;
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var padding = 40;
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var PI_HALF = Math.PI / 2;
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function init() {
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container.style.color = '#ff0';
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container.style.font = '13px/20px Arial, sans-serif';
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var shader, uniforms, material;
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w = container.offsetWidth || window.innerWidth;
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h = container.offsetHeight || window.innerHeight;
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camera = new THREE.Camera(
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30, w / h, 1, 10000);
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camera.position.z = distance;
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vector = new THREE.Vector3();
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scene = new THREE.Scene();
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sceneAtmosphere = new THREE.Scene();
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var geometry = new THREE.Sphere(200, 40, 30);
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shader = Shaders['earth'];
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uniforms = THREE.UniformsUtils.clone(shader.uniforms);
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uniforms['texture'].texture = THREE.ImageUtils.loadTexture(imgDir+'world' +
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'.jpg');
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material = new THREE.MeshShaderMaterial({
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uniforms: uniforms,
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vertexShader: shader.vertexShader,
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fragmentShader: shader.fragmentShader
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});
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mesh = new THREE.Mesh(geometry, material);
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mesh.matrixAutoUpdate = false;
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scene.addObject(mesh);
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shader = Shaders['atmosphere'];
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uniforms = THREE.UniformsUtils.clone(shader.uniforms);
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material = new THREE.MeshShaderMaterial({
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uniforms: uniforms,
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vertexShader: shader.vertexShader,
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fragmentShader: shader.fragmentShader
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});
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mesh = new THREE.Mesh(geometry, material);
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mesh.scale.x = mesh.scale.y = mesh.scale.z = 1.1;
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mesh.flipSided = true;
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mesh.matrixAutoUpdate = false;
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mesh.updateMatrix();
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sceneAtmosphere.addObject(mesh);
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geometry = new THREE.Cube(0.75, 0.75, 1, 1, 1, 1, null, false, { px: true,
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nx: true, py: true, ny: true, pz: false, nz: true});
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for (var i = 0; i < geometry.vertices.length; i++) {
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var vertex = geometry.vertices[i];
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vertex.position.z += 0.5;
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}
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point = new THREE.Mesh(geometry);
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renderer = new THREE.WebGLRenderer({antialias: true});
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renderer.autoClear = false;
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renderer.setClearColorHex(0x000000, 0.0);
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renderer.setSize(w, h);
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renderer.domElement.style.position = 'absolute';
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container.appendChild(renderer.domElement);
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container.addEventListener('mousedown', onMouseDown, false);
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container.addEventListener('mousewheel', onMouseWheel, false);
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document.addEventListener('keydown', onDocumentKeyDown, false);
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window.addEventListener('resize', onWindowResize, false);
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container.addEventListener('mouseover', function() {
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overRenderer = true;
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}, false);
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container.addEventListener('mouseout', function() {
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overRenderer = false;
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}, false);
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}
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addData = function(data, opts) {
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var lat, lng, size, color, i, step, colorFnWrapper;
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opts.animated = opts.animated || false;
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this.is_animated = opts.animated;
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opts.format = opts.format || 'magnitude'; // other option is 'legend'
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console.log(opts.format);
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if (opts.format === 'magnitude') {
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step = 3;
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colorFnWrapper = function(data, i) { return colorFn(data[i+2]); }
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} else if (opts.format === 'legend') {
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step = 4;
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colorFnWrapper = function(data, i) { return colorFn(data[i+3]); }
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} else {
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throw('error: format not supported: '+opts.format);
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}
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if (opts.animated) {
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if (this._baseGeometry === undefined) {
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this._baseGeometry = new THREE.Geometry();
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for (i = 0; i < data.length; i += step) {
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lat = data[i];
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lng = data[i + 1];
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// size = data[i + 2];
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color = colorFnWrapper(data,i);
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size = 0;
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addPoint(lat, lng, size, color, this._baseGeometry);
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}
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}
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if(this._morphTargetId === undefined) {
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this._morphTargetId = 0;
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} else {
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this._morphTargetId += 1;
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}
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opts.name = opts.name || 'morphTarget'+this._morphTargetId;
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}
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var subgeo = new THREE.Geometry();
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for (i = 0; i < data.length; i += step) {
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lat = data[i];
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lng = data[i + 1];
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color = colorFnWrapper(data,i);
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size = data[i + 2];
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size = size*200;
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addPoint(lat, lng, size, color, subgeo);
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}
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if (opts.animated) {
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this._baseGeometry.morphTargets.push({'name': opts.name, vertices: subgeo.vertices});
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} else {
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this._baseGeometry = subgeo;
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}
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};
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function createPoints() {
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if (this._baseGeometry !== undefined) {
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if (this.is_animated === false) {
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this.points = new THREE.Mesh(this._baseGeometry, new THREE.MeshBasicMaterial({
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color: 0xffffff,
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vertexColors: THREE.FaceColors,
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morphTargets: false
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}));
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} else {
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if (this._baseGeometry.morphTargets.length < 8) {
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console.log('t l',this._baseGeometry.morphTargets.length);
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var padding = 8-this._baseGeometry.morphTargets.length;
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console.log('padding', padding);
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for(var i=0; i<=padding; i++) {
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console.log('padding',i);
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this._baseGeometry.morphTargets.push({'name': 'morphPadding'+i, vertices: this._baseGeometry.vertices});
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}
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}
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this.points = new THREE.Mesh(this._baseGeometry, new THREE.MeshBasicMaterial({
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color: 0xffffff,
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vertexColors: THREE.FaceColors,
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morphTargets: true
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}));
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}
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scene.addObject(this.points);
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}
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}
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function addPoint(lat, lng, size, color, subgeo) {
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var phi = (90 - lat) * Math.PI / 180;
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var theta = (180 - lng) * Math.PI / 180;
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point.position.x = 200 * Math.sin(phi) * Math.cos(theta);
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point.position.y = 200 * Math.cos(phi);
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point.position.z = 200 * Math.sin(phi) * Math.sin(theta);
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point.lookAt(mesh.position);
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point.scale.z = -size;
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point.updateMatrix();
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var i;
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for (i = 0; i < point.geometry.faces.length; i++) {
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point.geometry.faces[i].color = color;
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}
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GeometryUtils.merge(subgeo, point);
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}
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function onMouseDown(event) {
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event.preventDefault();
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container.addEventListener('mousemove', onMouseMove, false);
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container.addEventListener('mouseup', onMouseUp, false);
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container.addEventListener('mouseout', onMouseOut, false);
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mouseOnDown.x = - event.clientX;
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mouseOnDown.y = event.clientY;
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targetOnDown.x = target.x;
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targetOnDown.y = target.y;
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container.style.cursor = 'move';
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}
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function onMouseMove(event) {
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mouse.x = - event.clientX;
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mouse.y = event.clientY;
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var zoomDamp = distance/1000;
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target.x = targetOnDown.x + (mouse.x - mouseOnDown.x) * 0.005 * zoomDamp;
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target.y = targetOnDown.y + (mouse.y - mouseOnDown.y) * 0.005 * zoomDamp;
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target.y = target.y > PI_HALF ? PI_HALF : target.y;
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target.y = target.y < - PI_HALF ? - PI_HALF : target.y;
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}
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function onMouseUp(event) {
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container.removeEventListener('mousemove', onMouseMove, false);
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container.removeEventListener('mouseup', onMouseUp, false);
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container.removeEventListener('mouseout', onMouseOut, false);
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container.style.cursor = 'auto';
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}
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function onMouseOut(event) {
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container.removeEventListener('mousemove', onMouseMove, false);
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container.removeEventListener('mouseup', onMouseUp, false);
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container.removeEventListener('mouseout', onMouseOut, false);
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}
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function onMouseWheel(event) {
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event.preventDefault();
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if (overRenderer) {
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zoom(event.wheelDeltaY * 0.3);
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}
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return false;
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}
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function onDocumentKeyDown(event) {
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switch (event.keyCode) {
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case 38:
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zoom(100);
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event.preventDefault();
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break;
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case 40:
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zoom(-100);
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event.preventDefault();
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break;
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}
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}
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function onWindowResize( event ) {
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console.log('resize');
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camera.aspect = window.innerWidth / window.innerHeight;
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camera.updateProjectionMatrix();
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/*custom change: if there is a container, the width and height is the container's width and height*/
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renderer.setSize( container.offsetWidth || window.innerWidth, container.offsetHeight || window.innerHeight );
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}
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function zoom(delta) {
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distanceTarget -= delta;
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distanceTarget = distanceTarget > 1000 ? 1000 : distanceTarget;
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distanceTarget = distanceTarget < 350 ? 350 : distanceTarget;
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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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}
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function render() {
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zoom(curZoomSpeed);
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rotation.x += (target.x - rotation.x) * 0.1;
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rotation.y += (target.y - rotation.y) * 0.1;
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distance += (distanceTarget - distance) * 0.3;
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camera.position.x = distance * Math.sin(rotation.x) * Math.cos(rotation.y);
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camera.position.y = distance * Math.sin(rotation.y);
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camera.position.z = distance * Math.cos(rotation.x) * Math.cos(rotation.y);
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vector.copy(camera.position);
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|
|
|
||
|
|
renderer.clear();
|
||
|
|
renderer.render(scene, camera);
|
||
|
|
renderer.render(sceneAtmosphere, camera);
|
||
|
|
}
|
||
|
|
|
||
|
|
init();
|
||
|
|
this.animate = animate;
|
||
|
|
|
||
|
|
|
||
|
|
this.__defineGetter__('time', function() {
|
||
|
|
return this._time || 0;
|
||
|
|
});
|
||
|
|
|
||
|
|
this.__defineSetter__('time', function(t) {
|
||
|
|
var validMorphs = [];
|
||
|
|
var morphDict = this.points.morphTargetDictionary;
|
||
|
|
for(var k in morphDict) {
|
||
|
|
if(k.indexOf('morphPadding') < 0) {
|
||
|
|
validMorphs.push(morphDict[k]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
validMorphs.sort();
|
||
|
|
var l = validMorphs.length-1;
|
||
|
|
var scaledt = t*l+1;
|
||
|
|
var index = Math.floor(scaledt);
|
||
|
|
for (i=0;i<validMorphs.length;i++) {
|
||
|
|
this.points.morphTargetInfluences[validMorphs[i]] = 0;
|
||
|
|
}
|
||
|
|
var lastIndex = index - 1;
|
||
|
|
var leftover = scaledt - index;
|
||
|
|
if (lastIndex >= 0) {
|
||
|
|
this.points.morphTargetInfluences[lastIndex] = 1 - leftover;
|
||
|
|
}
|
||
|
|
this.points.morphTargetInfluences[index] = leftover;
|
||
|
|
this._time = t;
|
||
|
|
});
|
||
|
|
|
||
|
|
this.addData = addData;
|
||
|
|
this.createPoints = createPoints;
|
||
|
|
this.renderer = renderer;
|
||
|
|
this.scene = scene;
|
||
|
|
|
||
|
|
return this;
|
||
|
|
|
||
|
|
};
|
||
|
|
|