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432 lines (348 loc) · 12.1 KB
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/**
* dat.globe Javascript WebGL Globe Toolkit
* http://dataarts.github.com/dat.globe
*
* Copyright 2011 Data Arts Team, Google Creative Lab
*
* Licensed under the Apache License, Version 2.0 (the 'License');
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*/
var DAT = DAT || {};
DAT.Globe = function(container, colorFn) {
colorFn = colorFn || function(x) {
var c = new THREE.Color();
var h = 0.6 - (x * 0.5);
if (h < 0) h = 0;
c.setHSV( h, 1.0, 1.0 );
return c;
};
var Shaders = {
'earth' : {
uniforms: {
'texture': { type: 't', value: 0, texture: null }
},
vertexShader: [
'varying vec3 vNormal;',
'varying vec2 vUv;',
'void main() {',
'gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );',
'vNormal = normalize( normalMatrix * normal );',
'vUv = uv;',
'}'
].join('\n'),
fragmentShader: [
'uniform sampler2D texture;',
'varying vec3 vNormal;',
'varying vec2 vUv;',
'void main() {',
'vec3 diffuse = texture2D( texture, vUv ).xyz;',
'float intensity = 1.05 - dot( vNormal, vec3( 0.0, 0.0, 1.0 ) );',
'vec3 atmosphere = vec3( 1.0, 1.0, 1.0 ) * pow( intensity, 3.0 );',
'gl_FragColor = vec4( diffuse + atmosphere, 1.0 );',
'}'
].join('\n')
},
'atmosphere' : {
uniforms: {},
vertexShader: [
'varying vec3 vNormal;',
'void main() {',
'vNormal = normalize( normalMatrix * normal );',
'gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );',
'}'
].join('\n'),
fragmentShader: [
'varying vec3 vNormal;',
'void main() {',
'float intensity = pow( 0.8 - dot( vNormal, vec3( 0, 0, 1.0 ) ), 12.0 );',
'gl_FragColor = vec4( 1.0, 1.0, 1.0, 1.0 ) * intensity;',
'}'
].join('\n')
}
};
var camera, scene, sceneAtmosphere, renderer, w, h;
var vector, mesh, atmosphere, point;
var overRenderer;
var imgDir = '/';
var curZoomSpeed = 0;
var zoomSpeed = 50;
var mouse = { x: 0, y: 0 }, mouseOnDown = { x: 0, y: 0 };
var rotation = { x: 0, y: 0 },
target = { x: Math.PI*3/2, y: Math.PI / 6.0 },
targetOnDown = { x: 0, y: 0 };
var distance = 100000, distanceTarget = 100000;
var padding = 40;
var PI_HALF = Math.PI / 2;
function init() {
container.style.color = '#fff';
container.style.font = '13px/20px Arial, sans-serif';
var shader, uniforms, material;
w = container.offsetWidth || window.innerWidth;
h = container.offsetHeight || window.innerHeight;
camera = new THREE.Camera(
30, w / h, 1, 10000);
camera.position.z = distance;
vector = new THREE.Vector3();
scene = new THREE.Scene();
sceneAtmosphere = new THREE.Scene();
var geometry = new THREE.Sphere(200, 40, 30);
shader = Shaders['earth'];
uniforms = THREE.UniformsUtils.clone(shader.uniforms);
uniforms['texture'].texture = THREE.ImageUtils.loadTexture(imgDir+'world' +
'.jpg');
material = new THREE.MeshShaderMaterial({
uniforms: uniforms,
vertexShader: shader.vertexShader,
fragmentShader: shader.fragmentShader
});
mesh = new THREE.Mesh(geometry, material);
mesh.matrixAutoUpdate = false;
scene.addObject(mesh);
shader = Shaders['atmosphere'];
uniforms = THREE.UniformsUtils.clone(shader.uniforms);
material = new THREE.MeshShaderMaterial({
uniforms: uniforms,
vertexShader: shader.vertexShader,
fragmentShader: shader.fragmentShader
});
mesh = new THREE.Mesh(geometry, material);
mesh.scale.x = mesh.scale.y = mesh.scale.z = 1.1;
mesh.flipSided = true;
mesh.matrixAutoUpdate = false;
mesh.updateMatrix();
sceneAtmosphere.addObject(mesh);
geometry = new THREE.Cube(0.75, 0.75, 1, 1, 1, 1, null, false, { px: true,
nx: true, py: true, ny: true, pz: false, nz: true});
for (var i = 0; i < geometry.vertices.length; i++) {
var vertex = geometry.vertices[i];
vertex.position.z += 0.5;
}
point = new THREE.Mesh(geometry);
renderer = new THREE.WebGLRenderer({antialias: true});
renderer.autoClear = false;
renderer.setClearColorHex(0x000000, 0.0);
renderer.setSize(w, h);
renderer.domElement.style.position = 'absolute';
container.appendChild(renderer.domElement);
container.addEventListener('mousedown', onMouseDown, false);
container.addEventListener('mousewheel', onMouseWheel, false);
container.addEventListener('DOMMouseScroll', onMouseWheel, false);
document.addEventListener('keydown', onDocumentKeyDown, false);
window.addEventListener('resize', onWindowResize, false);
container.addEventListener('mouseover', function() {
overRenderer = true;
}, false);
container.addEventListener('mouseout', function() {
overRenderer = false;
}, false);
}
addData = function(data, opts) {
var lat, lng, size, color, i, step, colorFnWrapper;
opts.animated = opts.animated || false;
this.is_animated = opts.animated;
opts.format = opts.format || 'magnitude'; // other option is 'legend'
if (opts.format === 'magnitude') {
step = 3;
colorFnWrapper = function(data, i) { return colorFn(data[i+2]); }
} else if (opts.format === 'legend') {
step = 4;
colorFnWrapper = function(data, i) { return colorFn(data[i+3]); }
} else {
throw('error: format not supported: '+opts.format);
}
if (opts.animated) {
if (this._baseGeometry === undefined) {
this._baseGeometry = new THREE.Geometry();
for (i = 0; i < data.length; i += step) {
lat = data[i];
lng = data[i + 1];
// size = data[i + 2];
color = colorFnWrapper(data,i);
size = 0;
addPoint(lat, lng, size, color, this._baseGeometry);
}
}
if(this._morphTargetId === undefined) {
this._morphTargetId = 0;
} else {
this._morphTargetId += 1;
}
opts.name = opts.name || 'morphTarget'+this._morphTargetId;
}
var subgeo = new THREE.Geometry();
for (i = 0; i < data.length; i += step) {
lat = data[i];
lng = data[i + 1];
color = colorFnWrapper(data,i);
size = data[i + 2];
size = size*200;
addPoint(lat, lng, size, color, subgeo);
}
if (opts.animated) {
this._baseGeometry.morphTargets.push({'name': opts.name, vertices: subgeo.vertices});
} else {
this._baseGeometry = subgeo;
}
};
function createPoints() {
if (this._baseGeometry !== undefined) {
if (this.points) scene.removeObject(this.points);
if (this.is_animated === false) {
this.points = new THREE.Mesh(this._baseGeometry, new THREE.MeshBasicMaterial({
color: 0xffffff,
vertexColors: THREE.FaceColors,
morphTargets: false
}));
} else {
if (this._baseGeometry.morphTargets.length < 8) {
console.log('t l',this._baseGeometry.morphTargets.length);
var padding = 8-this._baseGeometry.morphTargets.length;
console.log('padding', padding);
for(var i=0; i<=padding; i++) {
console.log('padding',i);
this._baseGeometry.morphTargets.push({'name': 'morphPadding'+i, vertices: this._baseGeometry.vertices});
}
}
this.points = new THREE.Mesh(this._baseGeometry, new THREE.MeshBasicMaterial({
color: 0xffffff,
vertexColors: THREE.FaceColors,
morphTargets: true
}));
}
scene.addObject(this.points);
}
}
function addPoint(lat, lng, size, color, subgeo) {
var phi = (90 - lat) * Math.PI / 180;
var theta = (180 - lng) * Math.PI / 180;
point.position.x = 200 * Math.sin(phi) * Math.cos(theta);
point.position.y = 200 * Math.cos(phi);
point.position.z = 200 * Math.sin(phi) * Math.sin(theta);
point.lookAt(mesh.position);
point.scale.z = -size;
point.updateMatrix();
var i;
for (i = 0; i < point.geometry.faces.length; i++) {
point.geometry.faces[i].color = color;
}
GeometryUtils.merge(subgeo, point);
}
function onMouseDown(event) {
event.preventDefault();
container.addEventListener('mousemove', onMouseMove, false);
container.addEventListener('mouseup', onMouseUp, false);
container.addEventListener('mouseout', onMouseOut, false);
mouseOnDown.x = - event.clientX;
mouseOnDown.y = event.clientY;
targetOnDown.x = target.x;
targetOnDown.y = target.y;
container.style.cursor = 'move';
}
function onMouseMove(event) {
mouse.x = - event.clientX;
mouse.y = event.clientY;
var zoomDamp = distance/1000;
target.x = targetOnDown.x + (mouse.x - mouseOnDown.x) * 0.005 * zoomDamp;
target.y = targetOnDown.y + (mouse.y - mouseOnDown.y) * 0.005 * zoomDamp;
target.y = target.y > PI_HALF ? PI_HALF : target.y;
target.y = target.y < - PI_HALF ? - PI_HALF : target.y;
}
function onMouseUp(event) {
container.removeEventListener('mousemove', onMouseMove, false);
container.removeEventListener('mouseup', onMouseUp, false);
container.removeEventListener('mouseout', onMouseOut, false);
container.style.cursor = 'auto';
}
function onMouseOut(event) {
container.removeEventListener('mousemove', onMouseMove, false);
container.removeEventListener('mouseup', onMouseUp, false);
container.removeEventListener('mouseout', onMouseOut, false);
}
function onMouseWheel(event) {
event.preventDefault();
if (overRenderer) {
if (event.wheelDeltaY) {
zoom(event.wheelDeltaY * 0.3);
} else {
zoom(event.detail * -36);
}
}
return false;
}
function onDocumentKeyDown(event) {
switch (event.keyCode) {
case 38:
zoom(100);
event.preventDefault();
break;
case 40:
zoom(-100);
event.preventDefault();
break;
}
}
function onWindowResize( event ) {
console.log('resize');
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}
function zoom(delta) {
distanceTarget -= delta;
distanceTarget = distanceTarget > 1000 ? 1000 : distanceTarget;
distanceTarget = distanceTarget < 350 ? 350 : distanceTarget;
}
function animate() {
requestAnimationFrame(animate);
render();
}
function render() {
zoom(curZoomSpeed);
rotation.x += (target.x - rotation.x) * 0.1;
rotation.y += (target.y - rotation.y) * 0.1;
distance += (distanceTarget - distance) * 0.3;
camera.position.x = distance * Math.sin(rotation.x) * Math.cos(rotation.y);
camera.position.y = distance * Math.sin(rotation.y);
camera.position.z = distance * Math.cos(rotation.x) * Math.cos(rotation.y);
vector.copy(camera.position);
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;
};
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