Commit 35582cf1 authored by amandaghassaei's avatar amandaghassaei
Browse files

centered gep

parent 9b6f9bfb
/**
* @author Eberhard Graether / http://egraether.com/
* @author Mark Lundin / http://mark-lundin.com
* @author Patrick Fuller / http://patrick-fuller.com
* @author Max Smolens / https://github.com/msmolens
*/
THREE.OrthographicTrackballControls = 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.radius = 0;
this.rotateSpeed = 1.0;
this.zoomSpeed = 1.2;
this.noRotate = false;
this.noZoom = false;
this.noPan = false;
this.noRoll = false;
this.staticMoving = false;
this.dynamicDampingFactor = 0.2;
this.keys = [ 65 /*A*/, 83 /*S*/, 68 /*D*/ ];
// internals
this.target = new THREE.Vector3();
var EPS = 0.000001;
var _changed = true;
var _state = STATE.NONE,
_prevState = STATE.NONE,
_eye = new THREE.Vector3(),
_rotateStart = new THREE.Vector3(),
_rotateEnd = new THREE.Vector3(),
_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();
this.left0 = this.object.left;
this.right0 = this.object.right;
this.top0 = this.object.top;
this.bottom0 = this.object.bottom;
// 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.radius = 0.5 * Math.min( this.screen.width, this.screen.height );
this.left0 = this.object.left;
this.right0 = this.object.right;
this.top0 = this.object.top;
this.bottom0 = this.object.bottom;
};
this.handleEvent = function ( event ) {
if ( typeof this[ event.type ] == 'function' ) {
this[ event.type ]( event );
}
};
var getMouseOnScreen = ( function () {
var vector = new THREE.Vector2();
return function getMouseOnScreen( pageX, pageY ) {
vector.set(
( pageX - _this.screen.left ) / _this.screen.width,
( pageY - _this.screen.top ) / _this.screen.height
);
return vector;
};
}() );
var getMouseProjectionOnBall = ( function () {
var vector = new THREE.Vector3();
var objectUp = new THREE.Vector3();
var mouseOnBall = new THREE.Vector3();
return function getMouseProjectionOnBall( pageX, pageY ) {
mouseOnBall.set(
( pageX - _this.screen.width * 0.5 - _this.screen.left ) / _this.radius,
( _this.screen.height * 0.5 + _this.screen.top - pageY ) / _this.radius,
0.0
);
var length = mouseOnBall.length();
if ( _this.noRoll ) {
if ( length < Math.SQRT1_2 ) {
mouseOnBall.z = Math.sqrt( 1.0 - length * length );
} else {
mouseOnBall.z = .5 / length;
}
} else if ( length > 1.0 ) {
mouseOnBall.normalize();
} else {
mouseOnBall.z = Math.sqrt( 1.0 - length * length );
}
_eye.copy( _this.object.position ).sub( _this.target );
vector.copy( _this.object.up ).setLength( mouseOnBall.y );
vector.add( objectUp.copy( _this.object.up ).cross( _eye ).setLength( mouseOnBall.x ) );
vector.add( _eye.setLength( mouseOnBall.z ) );
return vector;
};
}() );
this.rotateCamera = ( function() {
var axis = new THREE.Vector3(),
quaternion = new THREE.Quaternion();
return function rotateCamera() {
var angle = Math.acos( _rotateStart.dot( _rotateEnd ) / _rotateStart.length() / _rotateEnd.length() );
if ( angle ) {
axis.crossVectors( _rotateStart, _rotateEnd ).normalize();
angle *= _this.rotateSpeed;
quaternion.setFromAxisAngle( axis, - angle );
_eye.applyQuaternion( quaternion );
_this.object.up.applyQuaternion( quaternion );
_rotateEnd.applyQuaternion( quaternion );
if ( _this.staticMoving ) {
_rotateStart.copy( _rotateEnd );
} else {
quaternion.setFromAxisAngle( axis, angle * ( _this.dynamicDampingFactor - 1.0 ) );
_rotateStart.applyQuaternion( quaternion );
}
_changed = true;
}
}
}() );
this.zoomCamera = function () {
if ( _state === STATE.TOUCH_ZOOM_PAN ) {
var factor = _touchZoomDistanceEnd / _touchZoomDistanceStart;
_touchZoomDistanceStart = _touchZoomDistanceEnd;
_this.object.zoom *= factor;
_changed = true;
} else {
var factor = 1.0 + ( _zoomEnd.y - _zoomStart.y ) * _this.zoomSpeed;
if ( Math.abs( factor - 1.0 ) > EPS && factor > 0.0 ) {
_this.object.zoom /= factor;
if ( _this.staticMoving ) {
_zoomStart.copy( _zoomEnd );
} else {
_zoomStart.y += ( _zoomEnd.y - _zoomStart.y ) * this.dynamicDampingFactor;
}
_changed = true;
}
}
};
this.panCamera = ( function() {
var mouseChange = new THREE.Vector2(),
objectUp = new THREE.Vector3(),
pan = new THREE.Vector3();
return function panCamera() {
mouseChange.copy( _panEnd ).sub( _panStart );
if ( mouseChange.lengthSq() ) {
// Scale movement to keep clicked/dragged position under cursor
var scale_x = ( _this.object.right - _this.object.left ) / _this.object.zoom;
var scale_y = ( _this.object.top - _this.object.bottom ) / _this.object.zoom;
mouseChange.x *= scale_x;
mouseChange.y *= scale_y;
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 ) );
}
_changed = true;
}
}
}() );
this.update = function () {
_eye.subVectors( _this.object.position, _this.target );
if ( ! _this.noRotate ) {
_this.rotateCamera();
}
if ( ! _this.noZoom ) {
_this.zoomCamera();
if ( _changed ) {
_this.object.updateProjectionMatrix();
}
}
if ( ! _this.noPan ) {
_this.panCamera();
}
_this.object.position.addVectors( _this.target, _eye );
_this.object.lookAt( _this.target );
if ( _changed ) {
_this.dispatchEvent( changeEvent );
_changed = false;
}
};
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.left = _this.left0;
_this.object.right = _this.right0;
_this.object.top = _this.top0;
_this.object.bottom = _this.bottom0;
_this.object.lookAt( _this.target );
_this.update();
_this.dispatchEvent( changeEvent );
_changed = false;
};
// 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 ) {
_rotateStart.copy( getMouseProjectionOnBall( event.pageX, event.pageY ) );
_rotateEnd.copy( _rotateStart );
} 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 ) {
_rotateEnd.copy( getMouseProjectionOnBall( 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 ) );
}
_this.update();
}
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 );
_this.update();
}
function mousewheel( event ) {
if ( _this.enabled === false ) return;
// event.preventDefault();
// event.stopPropagation();
_zoomStart.y -= event.deltaY * 0.01;
_this.dispatchEvent( startEvent );
_this.dispatchEvent( endEvent );
_this.update();
}
function touchstart( event ) {
if ( _this.enabled === false ) return;
switch ( event.touches.length ) {
case 1:
_state = STATE.TOUCH_ROTATE;
_rotateStart.copy( getMouseProjectionOnBall( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) );
_rotateEnd.copy( _rotateStart );
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 );
_this.update();
}
function touchmove( event ) {
if ( _this.enabled === false ) return;
// event.preventDefault();
// event.stopPropagation();
switch ( event.touches.length ) {
case 1:
_rotateEnd.copy( getMouseProjectionOnBall( 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;
}
_this.update();
}
function touchend( event ) {
if ( _this.enabled === false ) return;
switch ( event.touches.length ) {
case 1:
_rotateEnd.copy( getMouseProjectionOnBall( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) );
_rotateStart.copy( _rotateEnd );
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.update();
}
function contextmenu( event ) {