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uvexz/The wriggle sphere.markdown

Created March 27, 2016 07:51
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The wriggle sphere
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index.html
<div id="canvas"></div>
Raw
script.js
/**
* @author Eberhard Graether / http://egraether.com/
* @author Mark Lundin / http://mark-lundin.com
* @author Simone Manini / http://daron1337.github.io
* @author Luca Antiga / http://lantiga.github.io
*/
THREE.TrackballControls = function ( object, domElement ) {
var _this = this;
var STATE = { NONE: -1, ROTATE: 0, ZOOM: 1, PAN: 2, TOUCH_ROTATE: 3, TOUCH_ZOOM_PAN: 4 };
this.object = object;
this.domElement = ( domElement !== undefined ) ? domElement : document;
// API
this.enabled = true;
this.screen = { left: 0, top: 0, width: 0, height: 0 };
this.rotateSpeed = 1.0;
this.zoomSpeed = 1.2;
this.panSpeed = 0.3;
this.noRotate = false;
this.noZoom = false;
this.noPan = false;
this.staticMoving = false;
this.dynamicDampingFactor = 0.2;
this.minDistance = 0;
this.maxDistance = Infinity;
this.keys = [ 65 /*A*/, 83 /*S*/, 68 /*D*/ ];
// internals
this.target = new THREE.Vector3();
var EPS = 0.000001;
var lastPosition = new THREE.Vector3();
var _state = STATE.NONE,
_prevState = STATE.NONE,
_eye = new THREE.Vector3(),
_movePrev = new THREE.Vector2(),
_moveCurr = new THREE.Vector2(),
_lastAxis = new THREE.Vector3(),
_lastAngle = 0,
_zoomStart = new THREE.Vector2(),
_zoomEnd = new THREE.Vector2(),
_touchZoomDistanceStart = 0,
_touchZoomDistanceEnd = 0,
_panStart = new THREE.Vector2(),
_panEnd = new THREE.Vector2();
// for reset
this.target0 = this.target.clone();
this.position0 = this.object.position.clone();
this.up0 = this.object.up.clone();
// events
var changeEvent = { type: 'change' };
var startEvent = { type: 'start' };
var endEvent = { type: 'end' };
// methods
this.handleResize = function () {
if ( this.domElement === document ) {
this.screen.left = 0;
this.screen.top = 0;
this.screen.width = window.innerWidth;
this.screen.height = window.innerHeight;
} else {
var box = this.domElement.getBoundingClientRect();
// adjustments come from similar code in the jquery offset() function
var d = this.domElement.ownerDocument.documentElement;
this.screen.left = box.left + window.pageXOffset - d.clientLeft;
this.screen.top = box.top + window.pageYOffset - d.clientTop;
this.screen.width = box.width;
this.screen.height = box.height;
}
};
this.handleEvent = function ( event ) {
if ( typeof this[ event.type ] == 'function' ) {
this[ event.type ]( event );
}
};
var getMouseOnScreen = ( function () {
var vector = new THREE.Vector2();
return function ( pageX, pageY ) {
vector.set(
( pageX - _this.screen.left ) / _this.screen.width,
( pageY - _this.screen.top ) / _this.screen.height
);
return vector;
};
}() );
var getMouseOnCircle = ( function () {
var vector = new THREE.Vector2();
return function ( pageX, pageY ) {
vector.set(
( ( pageX - _this.screen.width * 0.5 - _this.screen.left ) / ( _this.screen.width * 0.5 ) ),
( ( _this.screen.height + 2 * ( _this.screen.top - pageY ) ) / _this.screen.width ) // screen.width intentional
);
return vector;
};
}() );
this.rotateCamera = (function() {
var axis = new THREE.Vector3(),
quaternion = new THREE.Quaternion(),
eyeDirection = new THREE.Vector3(),
objectUpDirection = new THREE.Vector3(),
objectSidewaysDirection = new THREE.Vector3(),
moveDirection = new THREE.Vector3(),
angle;
return function () {
moveDirection.set( _moveCurr.x - _movePrev.x, _moveCurr.y - _movePrev.y, 0 );
angle = moveDirection.length();
if ( angle ) {
_eye.copy( _this.object.position ).sub( _this.target );
eyeDirection.copy( _eye ).normalize();
objectUpDirection.copy( _this.object.up ).normalize();
objectSidewaysDirection.crossVectors( objectUpDirection, eyeDirection ).normalize();
objectUpDirection.setLength( _moveCurr.y - _movePrev.y );
objectSidewaysDirection.setLength( _moveCurr.x - _movePrev.x );
moveDirection.copy( objectUpDirection.add( objectSidewaysDirection ) );
axis.crossVectors( moveDirection, _eye ).normalize();
angle *= _this.rotateSpeed;
quaternion.setFromAxisAngle( axis, angle );
_eye.applyQuaternion( quaternion );
_this.object.up.applyQuaternion( quaternion );
_lastAxis.copy( axis );
_lastAngle = angle;
}
else if ( !_this.staticMoving && _lastAngle ) {
_lastAngle *= Math.sqrt( 1.0 - _this.dynamicDampingFactor );
_eye.copy( _this.object.position ).sub( _this.target );
quaternion.setFromAxisAngle( _lastAxis, _lastAngle );
_eye.applyQuaternion( quaternion );
_this.object.up.applyQuaternion( quaternion );
}
_movePrev.copy( _moveCurr );
};
}());
this.zoomCamera = function () {
var factor;
if ( _state === STATE.TOUCH_ZOOM_PAN ) {
factor = _touchZoomDistanceStart / _touchZoomDistanceEnd;
_touchZoomDistanceStart = _touchZoomDistanceEnd;
_eye.multiplyScalar( factor );
} else {
factor = 1.0 + ( _zoomEnd.y - _zoomStart.y ) * _this.zoomSpeed;
if ( factor !== 1.0 && factor > 0.0 ) {
_eye.multiplyScalar( factor );
if ( _this.staticMoving ) {
_zoomStart.copy( _zoomEnd );
} else {
_zoomStart.y += ( _zoomEnd.y - _zoomStart.y ) * this.dynamicDampingFactor;
}
}
}
};
this.panCamera = (function() {
var mouseChange = new THREE.Vector2(),
objectUp = new THREE.Vector3(),
pan = new THREE.Vector3();
return function () {
mouseChange.copy( _panEnd ).sub( _panStart );
if ( mouseChange.lengthSq() ) {
mouseChange.multiplyScalar( _eye.length() * _this.panSpeed );
pan.copy( _eye ).cross( _this.object.up ).setLength( mouseChange.x );
pan.add( objectUp.copy( _this.object.up ).setLength( mouseChange.y ) );
_this.object.position.add( pan );
_this.target.add( pan );
if ( _this.staticMoving ) {
_panStart.copy( _panEnd );
} else {
_panStart.add( mouseChange.subVectors( _panEnd, _panStart ).multiplyScalar( _this.dynamicDampingFactor ) );
}
}
};
}());
this.checkDistances = function () {
if ( !_this.noZoom || !_this.noPan ) {
if ( _eye.lengthSq() > _this.maxDistance * _this.maxDistance ) {
_this.object.position.addVectors( _this.target, _eye.setLength( _this.maxDistance ) );
}
if ( _eye.lengthSq() < _this.minDistance * _this.minDistance ) {
_this.object.position.addVectors( _this.target, _eye.setLength( _this.minDistance ) );
}
}
};
this.update = function () {
_eye.subVectors( _this.object.position, _this.target );
if ( !_this.noRotate ) {
_this.rotateCamera();
}
if ( !_this.noZoom ) {
_this.zoomCamera();
}
if ( !_this.noPan ) {
_this.panCamera();
}
_this.object.position.addVectors( _this.target, _eye );
_this.checkDistances();
_this.object.lookAt( _this.target );
if ( lastPosition.distanceToSquared( _this.object.position ) > EPS ) {
_this.dispatchEvent( changeEvent );
lastPosition.copy( _this.object.position );
}
};
this.reset = function () {
_state = STATE.NONE;
_prevState = STATE.NONE;
_this.target.copy( _this.target0 );
_this.object.position.copy( _this.position0 );
_this.object.up.copy( _this.up0 );
_eye.subVectors( _this.object.position, _this.target );
_this.object.lookAt( _this.target );
_this.dispatchEvent( changeEvent );
lastPosition.copy( _this.object.position );
};
// listeners
function keydown( event ) {
if ( _this.enabled === false ) return;
window.removeEventListener( 'keydown', keydown );
_prevState = _state;
if ( _state !== STATE.NONE ) {
return;
} else if ( event.keyCode === _this.keys[ STATE.ROTATE ] && !_this.noRotate ) {
_state = STATE.ROTATE;
} else if ( event.keyCode === _this.keys[ STATE.ZOOM ] && !_this.noZoom ) {
_state = STATE.ZOOM;
} else if ( event.keyCode === _this.keys[ STATE.PAN ] && !_this.noPan ) {
_state = STATE.PAN;
}
}
function keyup( event ) {
if ( _this.enabled === false ) return;
_state = _prevState;
window.addEventListener( 'keydown', keydown, false );
}
function mousedown( event ) {
if ( _this.enabled === false ) return;
event.preventDefault();
event.stopPropagation();
if ( _state === STATE.NONE ) {
_state = event.button;
}
if ( _state === STATE.ROTATE && !_this.noRotate ) {
_moveCurr.copy( getMouseOnCircle( event.pageX, event.pageY ) );
_movePrev.copy(_moveCurr);
} else if ( _state === STATE.ZOOM && !_this.noZoom ) {
_zoomStart.copy( getMouseOnScreen( event.pageX, event.pageY ) );
_zoomEnd.copy(_zoomStart);
} else if ( _state === STATE.PAN && !_this.noPan ) {
_panStart.copy( getMouseOnScreen( event.pageX, event.pageY ) );
_panEnd.copy(_panStart);
}
document.addEventListener( 'mousemove', mousemove, false );
document.addEventListener( 'mouseup', mouseup, false );
_this.dispatchEvent( startEvent );
}
function mousemove( event ) {
if ( _this.enabled === false ) return;
event.preventDefault();
event.stopPropagation();
if ( _state === STATE.ROTATE && !_this.noRotate ) {
_movePrev.copy(_moveCurr);
_moveCurr.copy( getMouseOnCircle( event.pageX, event.pageY ) );
} else if ( _state === STATE.ZOOM && !_this.noZoom ) {
_zoomEnd.copy( getMouseOnScreen( event.pageX, event.pageY ) );
} else if ( _state === STATE.PAN && !_this.noPan ) {
_panEnd.copy( getMouseOnScreen( event.pageX, event.pageY ) );
}
}
function mouseup( event ) {
if ( _this.enabled === false ) return;
event.preventDefault();
event.stopPropagation();
_state = STATE.NONE;
document.removeEventListener( 'mousemove', mousemove );
document.removeEventListener( 'mouseup', mouseup );
_this.dispatchEvent( endEvent );
}
function mousewheel( event ) {
if ( _this.enabled === false ) return;
event.preventDefault();
event.stopPropagation();
var delta = 0;
if ( event.wheelDelta ) { // WebKit / Opera / Explorer 9
delta = event.wheelDelta / 40;
} else if ( event.detail ) { // Firefox
delta = - event.detail / 3;
}
_zoomStart.y += delta * 0.01;
_this.dispatchEvent( startEvent );
_this.dispatchEvent( endEvent );
}
function touchstart( event ) {
if ( _this.enabled === false ) return;
switch ( event.touches.length ) {
case 1:
_state = STATE.TOUCH_ROTATE;
_moveCurr.copy( getMouseOnCircle( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) );
_movePrev.copy(_moveCurr);
break;
case 2:
_state = STATE.TOUCH_ZOOM_PAN;
var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX;
var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY;
_touchZoomDistanceEnd = _touchZoomDistanceStart = Math.sqrt( dx * dx + dy * dy );
var x = ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX ) / 2;
var y = ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY ) / 2;
_panStart.copy( getMouseOnScreen( x, y ) );
_panEnd.copy( _panStart );
break;
default:
_state = STATE.NONE;
}
_this.dispatchEvent( startEvent );
}
function touchmove( event ) {
if ( _this.enabled === false ) return;
event.preventDefault();
event.stopPropagation();
switch ( event.touches.length ) {
case 1:
_movePrev.copy(_moveCurr);
_moveCurr.copy( getMouseOnCircle( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) );
break;
case 2:
var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX;
var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY;
_touchZoomDistanceEnd = Math.sqrt( dx * dx + dy * dy );
var x = ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX ) / 2;
var y = ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY ) / 2;
_panEnd.copy( getMouseOnScreen( x, y ) );
break;
default:
_state = STATE.NONE;
}
}
function touchend( event ) {
if ( _this.enabled === false ) return;
switch ( event.touches.length ) {
case 1:
_movePrev.copy(_moveCurr);
_moveCurr.copy( getMouseOnCircle( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) );
break;
case 2:
_touchZoomDistanceStart = _touchZoomDistanceEnd = 0;
var x = ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX ) / 2;
var y = ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY ) / 2;
_panEnd.copy( getMouseOnScreen( x, y ) );
_panStart.copy( _panEnd );
break;
}
_state = STATE.NONE;
_this.dispatchEvent( endEvent );
}
this.domElement.addEventListener( 'contextmenu', function ( event ) { event.preventDefault(); }, false );
this.domElement.addEventListener( 'mousedown', mousedown, false );
this.domElement.addEventListener( 'mousewheel', mousewheel, false );
this.domElement.addEventListener( 'DOMMouseScroll', mousewheel, false ); // firefox
this.domElement.addEventListener( 'touchstart', touchstart, false );
this.domElement.addEventListener( 'touchend', touchend, false );
this.domElement.addEventListener( 'touchmove', touchmove, false );
window.addEventListener( 'keydown', keydown, false );
window.addEventListener( 'keyup', keyup, false );
this.handleResize();
// force an update at start
this.update();
};
THREE.TrackballControls.prototype = Object.create( THREE.EventDispatcher.prototype );
THREE.TrackballControls.prototype.constructor = THREE.TrackballControls;
(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
var Get = require('./get');
var get = new Get();
var debounce = require('./debounce');
var Camera = require('./camera');
var PointLight = require('./pointLight');
var HemiLight = require('./hemiLight');
var Mesh = require('./mesh');
var bodyWidth = document.body.clientWidth;
var bodyHeight = document.body.clientHeight;
var fps = 60;
var frameTime;
var lastTimeRender = +new Date();
var canvas;
var renderer;
var scene;
var camera;
var light;
var globe;
var ball;
var initThree = function() {
canvas = document.getElementById('canvas');
renderer = new THREE.WebGLRenderer({
antialias: true
});
if (!renderer) {
alert('Three.jsの初期化に失敗しました。');
}
renderer.setSize(bodyWidth, bodyHeight);
canvas.appendChild(renderer.domElement);
renderer.setClearColor(0xeeeeee, 1.0);
scene = new THREE.Scene();
};
var init = function() {
var ballGeometry = new THREE.SphereGeometry(360, 20, 20);
var ballMaterial = new THREE.MeshLambertMaterial({
color: 0xffffff,
shading: THREE.FlatShading
});
initThree();
camera = new Camera();
camera.init(get.radian(45), get.radian(0), bodyWidth, bodyHeight);
light = new HemiLight();
light.init(scene, get.radian(0), get.radian(120), 1000, 0x66ff99, 0x3366aa, 1);
ball = new Mesh();
ball.init(scene, ballGeometry, ballMaterial);
renderloop();
debounce(window, 'resize', function(event){
resizeRenderer();
});
};
var render = function() {
renderer.clear();
ball.updateVertices();
renderer.render(scene, camera.obj);
};
var renderloop = function() {
var now = +new Date();
requestAnimationFrame(renderloop);
if (now - lastTimeRender > 1000 / fps) {
render();
lastTimeRender = +new Date();
}
camera.trackball.update();
};
var resizeRenderer = function() {
bodyWidth = document.body.clientWidth;
bodyHeight = document.body.clientHeight;
renderer.setSize(bodyWidth, bodyHeight);
camera.init(get.radian(45), get.radian(0), bodyWidth, bodyHeight);
};
init();
},{"./camera":2,"./debounce":3,"./get":4,"./hemiLight":5,"./mesh":6,"./pointLight":7}],2:[function(require,module,exports){
var Get = require('./get');
var get = new Get();
var exports = function(){
var Camera = function() {
this.width = 0;
this.height = 0;
this.rad1 = 0;
this.rad2 = 0;
this.x = 0;
this.y = 0;
this.z = 0;
this.r = 0;
this.obj;
this.trackball;
};
Camera.prototype.init = function(rad1, rad2, width, height) {
this.width = width;
this.height = height;
this.r = 1200;
this.rad1 = rad1;
this.rad2 = rad2;
this.obj = new THREE.PerspectiveCamera(50, this.width / this.height, 1, 10000);
this.setPosition(this.rad1, this.rad2, this.r);
this.initTrackBall();
};
Camera.prototype.setPosition = function(rad1, rad2) {
var points = get.pointSphere(rad1, rad2, this.r);
this.obj.position.set(points[0], points[1], points[2]);
this.obj.up.set(0, 1, 0);
this.obj.lookAt({
x: 0,
y: 0,
z: 0
});
};
Camera.prototype.initTrackBall = function() {
this.trackball = new THREE.TrackballControls(this.obj, this.canvas);
this.trackball.screen.width = this.width;
this.trackball.screen.height = this.height;
this.trackball.noRotate = false;
this.trackball.rotateSpeed = 3;
this.trackball.noZoom = true;
this.trackball.zoomSpeed = 1;
this.trackball.noPan = false;
this.trackball.maxDistance = 3000;
this.trackball.minDistance = 500;
};
return Camera;
};
module.exports = exports();
},{"./get":4}],3:[function(require,module,exports){
module.exports = function(object, eventType, callback){
var timer;
object.addEventListener(eventType, function(event) {
clearTimeout(timer);
timer = setTimeout(function(){
callback(event);
}, 500);
}, false);
};
},{}],4:[function(require,module,exports){
var exports = function(){
var Get = function() {};
Get.prototype.randomInt = function(min, max){
return Math.floor(Math.random() * (max - min)) + min;
};
Get.prototype.degree = function(radian) {
return radian / Math.PI * 180;
};
Get.prototype.radian = function(degrees) {
return degrees * Math.PI / 180;
};
Get.prototype.pointSphere = function(rad1, rad2, r) {
var x = Math.cos(rad1) * Math.cos(rad2) * r;
var z = Math.cos(rad1) * Math.sin(rad2) * r;
var y = Math.sin(rad1) * r;
return [x, y, z];
};
return Get;
};
module.exports = exports();
},{}],5:[function(require,module,exports){
var Get = require('./get');
var get = new Get();
var exports = function(){
var HemiLight = function() {
this.rad1 = 0;
this.rad2 = 0;
this.x = 0;
this.y = 0;
this.z = 0;
this.r = 0;
this.obj;
};
HemiLight.prototype.init = function(scene, rad1, rad2, r, hex1, hex2, intensity) {
this.r = r;
this.obj = new THREE.HemisphereLight(hex1, hex2, intensity);
this.setPosition(rad1, rad2);
scene.add(this.obj);
};
HemiLight.prototype.setPosition = function(rad1, rad2) {
var points = get.pointSphere(rad1, rad2, this.r);
this.obj.position.set(points[0], points[1], points[2]);
};
return HemiLight;
};
module.exports = exports();
},{"./get":4}],6:[function(require,module,exports){
var Get = require('./get');
var get = new Get();
var exports = function() {
var Mesh = function() {
this.r = 0;
this.x = 0;
this.y = 0;
this.z = 0;
this.geometry;
this.material;
this.mesh;
this.vertexArr = [];
this.vertexDeg = [];
this.vertexWaveCoe = 0;
};
Mesh.prototype.init = function(scene, geometry, material) {
this.geometry = geometry;
this.material = material;
this.mesh = new THREE.Mesh(this.geometry, this.material);
this.r = this.geometry.parameters.radius;
this.vertexWaveCoe = this.r / 30;
this.geometry.mergeVertices();
this.updateVerticesInt();
this.setPosition();
this.mesh.rotation.set(get.radian(45), 0,0);
scene.add(this.mesh);
};
Mesh.prototype.setPosition = function() {
this.mesh.position.set(this.x, this.y, this.z);
};
Mesh.prototype.updateVerticesInt = function() {
var vertices = this.mesh.geometry.vertices;
for (var i = 0; i < vertices.length; i++) {
var r = this.r;
this.vertexArr[i] = r;
this.vertexDeg[i] = get.randomInt(0, 360);
vertices[i].normalize().multiplyScalar(r);
}
this.mesh.geometry.computeVertexNormals();
this.mesh.geometry.computeFaceNormals();
this.mesh.geometry.verticesNeedUpdate = true;
this.mesh.geometry.elementsNeedUpdate = true;
this.mesh.geometry.normalsNeedUpdate = true;
};
Mesh.prototype.updateVertices = function() {
var vertices = this.mesh.geometry.vertices;
for (var i = 0; i < this.vertexArr.length; i++) {
var r;
this.vertexDeg[i] += 8;
r = this.vertexArr[i] + Math.sin(get.radian(this.vertexDeg[i])) * this.vertexWaveCoe;
vertices[i].normalize().multiplyScalar(r);
}
this.mesh.geometry.computeVertexNormals();
this.mesh.geometry.computeFaceNormals();
this.mesh.geometry.verticesNeedUpdate = true;
this.mesh.geometry.elementsNeedUpdate = true;
this.mesh.geometry.normalsNeedUpdate = true;
};
return Mesh;
};
module.exports = exports();
},{"./get":4}],7:[function(require,module,exports){
var Get = require('./get');
var get = new Get();
var exports = function(){
var PointLight = function() {
this.rad1 = 0;
this.rad2 = 0;
this.x = 0;
this.y = 0;
this.z = 0;
this.r = 0;
this.obj;
};
PointLight.prototype.init = function(scene, rad1, rad2, r, hex, intensity, distance) {
this.r = r;
this.obj = new THREE.PointLight(hex, intensity, distance);
this.setPosition(rad1, rad2);
scene.add(this.obj);
};
PointLight.prototype.setPosition = function(rad1, rad2) {
var points = get.pointSphere(rad1, rad2, this.r);
this.obj.position.set(points[0], points[1], points[2]);
};
return PointLight;
};
module.exports = exports();
},{"./get":4}]},{},[1]);
Raw
scripts
<script src="//cdnjs.cloudflare.com/ajax/libs/three.js/r70/three.min.js"></script>
Raw
style.css
* {
margin: 0;
padding: 0
}
html {
height: 100%
}
body {
height: 100%;
overflow: hidden
}
canvas {
position: absolute
}
Raw
The wriggle sphere.markdown

The wriggle sphere

Three.jsで提供される標準Geometryの座標を操作するデモ。
座標の更新をグラフィックに反映させるには、以下のメソッドとプロパティが必要。

mesh.geometry.computeVertexNormals();
mesh.geometry.computeFaceNormals();
mesh.geometry.verticesNeedUpdate = true;
mesh.geometry.elementsNeedUpdate = true;
mesh.geometry.normalsNeedUpdate = true;

A Pen by yoichi kobayashi on CodePen.

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