457 lines
10 KiB
JavaScript
457 lines
10 KiB
JavaScript
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/**
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* @author qiao / https://github.com/qiao
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* @author mrdoob / http://mrdoob.com
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* @author alteredq / http://alteredqualia.com/
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* @author WestLangley / https://github.com/WestLangley
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* @author erich666 / http://erichaines.com
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*
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* Not quite correct: sort of assumes a 45 degree field of view.
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* Currently uses distance to target for offsetting
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*/
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THREE.OrbitAndPanControls = function ( object, domElement ) {
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this.addEventListener = THREE.EventDispatcher.prototype.addEventListener;
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this.hasEventListener = THREE.EventDispatcher.prototype.hasEventListener;
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this.removeEventListener = THREE.EventDispatcher.prototype.removeEventListener;
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this.dispatchEvent = THREE.EventDispatcher.prototype.dispatchEvent;
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this.enabled = true;
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this.object = object;
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this.domElement = ( domElement !== undefined ) ? domElement : document;
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// API
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this.target = new THREE.Vector3();
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this.userZoom = true;
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this.userZoomSpeed = 1.0;
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this.userRotate = true;
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this.userRotateSpeed = 1.0;
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this.autoRotate = false;
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this.autoRotateSpeed = 2.0; // 30 seconds per round when fps is 60
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this.minPolarAngle = 0; // radians
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this.maxPolarAngle = Math.PI; // radians
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this.minDistance = 0;
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this.maxDistance = Infinity;
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// internals
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var scope = this;
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var EPS = 0.000001;
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var rotateStart = new THREE.Vector2();
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var rotateEnd = new THREE.Vector2();
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var rotateDelta = new THREE.Vector2();
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var panStart = new THREE.Vector2();
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var panEnd = new THREE.Vector2();
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var panDelta = new THREE.Vector2();
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var dollyStart = new THREE.Vector2();
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var dollyEnd = new THREE.Vector2();
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var dollyDelta = new THREE.Vector2();
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var phiDelta = 0;
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var thetaDelta = 0;
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var scale = 1;
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var pan = new THREE.Vector3();
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var lastPosition = new THREE.Vector3();
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var STATE = { NONE : -1, ROTATE : 0, DOLLY : 1, PAN : 2, TOUCH_ROTATE : 3, TOUCH_DOLLY : 4, TOUCH_PAN : 5 };
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var state = STATE.NONE;
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// events
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var changeEvent = { type: 'change' };
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this.rotateLeft = function ( angle ) {
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if ( angle === undefined ) {
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angle = getAutoRotationAngle();
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}
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thetaDelta -= angle;
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};
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this.rotateUp = function ( angle ) {
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if ( angle === undefined ) {
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angle = getAutoRotationAngle();
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}
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phiDelta -= angle;
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};
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this.panLeft = function ( distance ) {
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var panOffset = new THREE.Vector3();
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var te = this.object.matrix.elements;
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// get X column of matrix
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panOffset.set( te[0], te[1], te[2] );
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panOffset.multiplyScalar(-distance);
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pan.add( panOffset );
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};
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this.panUp = function ( distance ) {
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var panOffset = new THREE.Vector3();
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var te = this.object.matrix.elements;
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// get Y column of matrix
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panOffset.set( te[4], te[5], te[6] );
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panOffset.multiplyScalar(distance);
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pan.add( panOffset );
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};
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this.dollyIn = function ( dollyScale ) {
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if ( dollyScale === undefined ) {
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dollyScale = getZoomScale();
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}
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scale /= dollyScale;
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};
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this.dollyOut = function ( dollyScale ) {
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if ( dollyScale === undefined ) {
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dollyScale = getZoomScale();
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}
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scale *= dollyScale;
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};
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this.update = function () {
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var position = this.object.position;
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var offset = position.clone().sub( this.target );
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// angle from z-axis around y-axis
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var theta = Math.atan2( offset.x, offset.z );
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// angle from y-axis
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var phi = Math.atan2( Math.sqrt( offset.x * offset.x + offset.z * offset.z ), offset.y );
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if ( this.autoRotate ) {
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this.rotateLeft( getAutoRotationAngle() );
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}
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theta += thetaDelta;
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phi += phiDelta;
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// restrict phi to be between desired limits
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phi = Math.max( this.minPolarAngle, Math.min( this.maxPolarAngle, phi ) );
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// restrict phi to be betwee EPS and PI-EPS
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phi = Math.max( EPS, Math.min( Math.PI - EPS, phi ) );
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var radius = offset.length() * scale;
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// restrict radius to be between desired limits
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radius = Math.max( this.minDistance, Math.min( this.maxDistance, radius ) );
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// move target to panned location
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this.target.add( pan );
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offset.x = radius * Math.sin( phi ) * Math.sin( theta );
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offset.y = radius * Math.cos( phi );
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offset.z = radius * Math.sin( phi ) * Math.cos( theta );
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position.copy( this.target ).add( offset );
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this.object.lookAt( this.target );
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thetaDelta = 0;
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phiDelta = 0;
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scale = 1;
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pan.set(0,0,0);
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if ( lastPosition.distanceTo( this.object.position ) > 0 ) {
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this.dispatchEvent( changeEvent );
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lastPosition.copy( this.object.position );
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}
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};
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function getAutoRotationAngle() {
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return 2 * Math.PI / 60 / 60 * scope.autoRotateSpeed;
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}
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function getZoomScale() {
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return Math.pow( 0.95, scope.userZoomSpeed );
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}
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function onMouseDown( event ) {
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if ( scope.enabled === false ) { return; }
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if ( !scope.userRotate ) { return; }
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event.preventDefault();
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if ( event.button === 0 ) {
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state = STATE.ROTATE;
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rotateStart.set( event.clientX, event.clientY );
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} /*else if ( event.button === 2 ) {
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state = STATE.PAN;
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panStart.set( event.clientX, event.clientY );
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}*/ else if ( event.button === 2 ) {
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state = STATE.DOLLY;
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dollyStart.set( event.clientX, event.clientY );
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}
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document.addEventListener( 'mousemove', onMouseMove, false );
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document.addEventListener( 'mouseup', onMouseUp, false );
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}
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function onMouseMove( event ) {
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if ( scope.enabled === false ) { return; }
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event.preventDefault();
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if ( state === STATE.ROTATE ) {
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rotateEnd.set( event.clientX, event.clientY );
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rotateDelta.subVectors( rotateEnd, rotateStart );
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scope.rotateLeft( 2 * Math.PI * rotateDelta.x / scope.domElement.width * scope.userRotateSpeed );
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scope.rotateUp( Math.PI * rotateDelta.y / scope.domElement.height * scope.userRotateSpeed );
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rotateStart.copy( rotateEnd );
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} else if ( state === STATE.PAN ) {
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panEnd.set( event.clientX, event.clientY );
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panDelta.subVectors( panEnd, panStart );
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var position = scope.object.position;
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var offset = position.clone().sub( scope.target );
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var targetDistance = offset.length();
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if ( scope.object.fov !== undefined )
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{
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// half of the fov is center to top of screen
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targetDistance *= Math.tan( (scope.object.fov/2) * Math.PI / 180.0 );
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}
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// we actually don't use screenWidth, since perspective camera is fixed to screen height
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scope.panLeft( 2 * panDelta.x * targetDistance / scope.domElement.height );
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scope.panUp( 2 * panDelta.y * targetDistance / scope.domElement.height );
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panStart.copy( panEnd );
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} else if ( state === STATE.DOLLY ) {
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dollyEnd.set( event.clientX, event.clientY );
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dollyDelta.subVectors( dollyEnd, dollyStart );
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if ( dollyDelta.y > 0 ) {
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scope.dollyIn();
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} else {
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scope.dollyOut();
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}
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dollyStart.copy( dollyEnd );
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}
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}
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function onMouseUp( /* event */ ) {
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if ( scope.enabled === false ) { return; }
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if ( ! scope.userRotate ) { return; }
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document.removeEventListener( 'mousemove', onMouseMove, false );
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document.removeEventListener( 'mouseup', onMouseUp, false );
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state = STATE.NONE;
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}
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function onMouseWheel( event ) {
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if ( scope.enabled === false ) { return; }
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if ( ! scope.userZoom ) { return; }
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var delta = 0;
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if ( event.wheelDelta ) { // WebKit / Opera / Explorer 9
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delta = event.wheelDelta;
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} else if ( event.detail ) { // Firefox
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delta = - event.detail;
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}
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if ( delta > 0 ) {
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scope.dollyOut();
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} else {
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scope.dollyIn();
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}
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}
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function touchstart( event ) {
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if ( scope.enabled === false ) { return; }
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/* TODO, innards of mouse begin here
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switch ( event.touches.length ) {
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case 1:
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state = STATE.TOUCH_ROTATE;
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rotateStart.set( event.clientX, event.clientY );
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_state = STATE.TOUCH_ROTATE;
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_rotateStart = _rotateEnd = _this.getMouseProjectionOnBall( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
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break;
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case 2:
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state = STATE.TOUCH_DOLLY;
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dollyStart.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
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// classier would be to take both points for a multitouch stretch thing:
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//var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX;
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//var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY;
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//_touchZoomDistanceEnd = _touchZoomDistanceStart = Math.sqrt( dx * dx + dy * dy );
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break;
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case 3:
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state = STATE.TOUCH_PAN;
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panStart.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
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break;
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default:
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state = STATE.NONE;
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}
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*/
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}
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function touchmove( event ) {
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if ( scope.enabled === false ) { return; }
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event.preventDefault();
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event.stopPropagation();
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/* TODO, innards of mouse move here
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switch ( event.touches.length ) {
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case 1:
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_rotateEnd = _this.getMouseProjectionOnBall( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
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break;
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case 2:
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var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX;
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var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY;
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_touchZoomDistanceEnd = Math.sqrt( dx * dx + dy * dy )
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break;
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case 3:
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_panEnd = _this.getMouseOnScreen( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
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break;
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default:
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_state = STATE.NONE;
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}
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*/
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}
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function touchend( event ) {
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|
if ( scope.enabled === false ) { return; }
|
||
|
|
|
||
|
|
/* from trackball. I don't think we need anything.
|
||
|
|
switch ( event.touches.length ) {
|
||
|
|
|
||
|
|
case 1:
|
||
|
|
_rotateStart = _rotateEnd = _this.getMouseProjectionOnBall( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 2:
|
||
|
|
_touchZoomDistanceStart = _touchZoomDistanceEnd = 0;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 3:
|
||
|
|
_panStart = _panEnd = _this.getMouseOnScreen( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
|
||
|
|
break;
|
||
|
|
|
||
|
|
}
|
||
|
|
*/
|
||
|
|
|
||
|
|
state = STATE.NONE;
|
||
|
|
}
|
||
|
|
|
||
|
|
this.domElement.addEventListener( 'contextmenu', function ( event ) { event.preventDefault(); }, false );
|
||
|
|
this.domElement.addEventListener( 'mousedown', onMouseDown, false );
|
||
|
|
this.domElement.addEventListener( 'mousewheel', onMouseWheel, false );
|
||
|
|
this.domElement.addEventListener( 'DOMMouseScroll', onMouseWheel, false ); // firefox
|
||
|
|
|
||
|
|
this.domElement.addEventListener( 'touchstart', touchstart, false );
|
||
|
|
this.domElement.addEventListener( 'touchend', touchend, false );
|
||
|
|
this.domElement.addEventListener( 'touchmove', touchmove, false );
|
||
|
|
|
||
|
|
};
|