Doodle3D-Slicer/three.js-master/examples/js/controls/EditorControls.js
2015-06-12 15:58:26 +02:00

299 lines
7.2 KiB
JavaScript
Executable File

/**
* @author qiao / https://github.com/qiao
* @author mrdoob / http://mrdoob.com
* @author alteredq / http://alteredqualia.com/
* @author WestLangley / http://github.com/WestLangley
*/
THREE.EditorControls = function ( object, domElement ) {
domElement = ( domElement !== undefined ) ? domElement : document;
// API
this.enabled = true;
this.center = new THREE.Vector3();
// internals
var scope = this;
var vector = new THREE.Vector3();
var STATE = { NONE: -1, ROTATE: 0, ZOOM: 1, PAN: 2 };
var state = STATE.NONE;
var center = this.center;
var normalMatrix = new THREE.Matrix3();
var pointer = new THREE.Vector2();
var pointerOld = new THREE.Vector2();
// events
var changeEvent = { type: 'change' };
this.focus = function ( target, frame ) {
var scale = new THREE.Vector3();
target.matrixWorld.decompose( center, new THREE.Quaternion(), scale );
if ( frame && target.geometry ) {
scale = ( scale.x + scale.y + scale.z ) / 3;
center.add(target.geometry.boundingSphere.center.clone().multiplyScalar( scale ));
var radius = target.geometry.boundingSphere.radius * ( scale );
var pos = object.position.clone().sub( center ).normalize().multiplyScalar( radius * 2 );
object.position.copy( center ).add( pos );
}
object.lookAt( center );
scope.dispatchEvent( changeEvent );
};
this.pan = function ( delta ) {
var distance = object.position.distanceTo( center );
delta.multiplyScalar( distance * 0.001 );
delta.applyMatrix3( normalMatrix.getNormalMatrix( object.matrix ) );
object.position.add( delta );
center.add( delta );
scope.dispatchEvent( changeEvent );
};
this.zoom = function ( delta ) {
var distance = object.position.distanceTo( center );
delta.multiplyScalar( distance * 0.001 );
if ( delta.length() > distance ) return;
delta.applyMatrix3( normalMatrix.getNormalMatrix( object.matrix ) );
object.position.add( delta );
scope.dispatchEvent( changeEvent );
};
this.rotate = function ( delta ) {
vector.copy( object.position ).sub( center );
var theta = Math.atan2( vector.x, vector.z );
var phi = Math.atan2( Math.sqrt( vector.x * vector.x + vector.z * vector.z ), vector.y );
theta += delta.x;
phi += delta.y;
var EPS = 0.000001;
phi = Math.max( EPS, Math.min( Math.PI - EPS, phi ) );
var radius = vector.length();
vector.x = radius * Math.sin( phi ) * Math.sin( theta );
vector.y = radius * Math.cos( phi );
vector.z = radius * Math.sin( phi ) * Math.cos( theta );
object.position.copy( center ).add( vector );
object.lookAt( center );
scope.dispatchEvent( changeEvent );
};
// mouse
function onMouseDown( event ) {
if ( scope.enabled === false ) return;
if ( event.button === 0 ) {
state = STATE.ROTATE;
} else if ( event.button === 1 ) {
state = STATE.ZOOM;
} else if ( event.button === 2 ) {
state = STATE.PAN;
}
pointerOld.set( event.clientX, event.clientY );
domElement.addEventListener( 'mousemove', onMouseMove, false );
domElement.addEventListener( 'mouseup', onMouseUp, false );
domElement.addEventListener( 'mouseout', onMouseUp, false );
domElement.addEventListener( 'dblclick', onMouseUp, false );
}
function onMouseMove( event ) {
if ( scope.enabled === false ) return;
pointer.set( event.clientX, event.clientY );
var movementX = pointer.x - pointerOld.x;
var movementY = pointer.y - pointerOld.y;
if ( state === STATE.ROTATE ) {
scope.rotate( new THREE.Vector3( - movementX * 0.005, - movementY * 0.005, 0 ) );
} else if ( state === STATE.ZOOM ) {
scope.zoom( new THREE.Vector3( 0, 0, movementY ) );
} else if ( state === STATE.PAN ) {
scope.pan( new THREE.Vector3( - movementX, movementY, 0 ) );
}
pointerOld.set( event.clientX, event.clientY );
}
function onMouseUp( event ) {
domElement.removeEventListener( 'mousemove', onMouseMove, false );
domElement.removeEventListener( 'mouseup', onMouseUp, false );
domElement.removeEventListener( 'mouseout', onMouseUp, false );
domElement.removeEventListener( 'dblclick', onMouseUp, false );
state = STATE.NONE;
}
function onMouseWheel( event ) {
event.preventDefault();
// if ( scope.enabled === false ) return;
var delta = 0;
if ( event.wheelDelta ) { // WebKit / Opera / Explorer 9
delta = - event.wheelDelta;
} else if ( event.detail ) { // Firefox
delta = event.detail * 10;
}
scope.zoom( new THREE.Vector3( 0, 0, delta ) );
}
domElement.addEventListener( 'contextmenu', function ( event ) { event.preventDefault(); }, false );
domElement.addEventListener( 'mousedown', onMouseDown, false );
domElement.addEventListener( 'mousewheel', onMouseWheel, false );
domElement.addEventListener( 'DOMMouseScroll', onMouseWheel, false ); // firefox
// touch
var touch = new THREE.Vector3();
var touches = [ new THREE.Vector3(), new THREE.Vector3(), new THREE.Vector3() ];
var prevTouches = [ new THREE.Vector3(), new THREE.Vector3(), new THREE.Vector3() ];
var prevDistance = null;
function touchStart( event ) {
if ( scope.enabled === false ) return;
switch ( event.touches.length ) {
case 1:
touches[ 0 ].set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY, 0 );
touches[ 1 ].set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY, 0 );
break;
case 2:
touches[ 0 ].set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY, 0 );
touches[ 1 ].set( event.touches[ 1 ].pageX, event.touches[ 1 ].pageY, 0 );
prevDistance = touches[ 0 ].distanceTo( touches[ 1 ] );
break;
}
prevTouches[ 0 ].copy( touches[ 0 ] );
prevTouches[ 1 ].copy( touches[ 1 ] );
}
function touchMove( event ) {
if ( scope.enabled === false ) return;
event.preventDefault();
event.stopPropagation();
var getClosest = function( touch, touches ) {
var closest = touches[ 0 ];
for ( var i in touches ) {
if ( closest.distanceTo(touch) > touches[ i ].distanceTo(touch) ) closest = touches[ i ];
}
return closest;
}
switch ( event.touches.length ) {
case 1:
touches[ 0 ].set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY, 0 );
touches[ 1 ].set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY, 0 );
scope.rotate( touches[ 0 ].sub( getClosest( touches[ 0 ], prevTouches ) ).multiplyScalar( - 0.005 ) );
break;
case 2:
touches[ 0 ].set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY, 0 );
touches[ 1 ].set( event.touches[ 1 ].pageX, event.touches[ 1 ].pageY, 0 );
distance = touches[ 0 ].distanceTo( touches[ 1 ] );
scope.zoom( new THREE.Vector3( 0, 0, prevDistance - distance ) );
prevDistance = distance;
var offset0 = touches[ 0 ].clone().sub( getClosest( touches[ 0 ], prevTouches ) );
var offset1 = touches[ 1 ].clone().sub( getClosest( touches[ 1 ], prevTouches ) );
offset0.x = -offset0.x;
offset1.x = -offset1.x;
scope.pan( offset0.add( offset1 ).multiplyScalar( 0.5 ) );
break;
}
prevTouches[ 0 ].copy( touches[ 0 ] );
prevTouches[ 1 ].copy( touches[ 1 ] );
}
domElement.addEventListener( 'touchstart', touchStart, false );
domElement.addEventListener( 'touchmove', touchMove, false );
};
THREE.EditorControls.prototype = Object.create( THREE.EventDispatcher.prototype );
THREE.EditorControls.prototype.constructor = THREE.EditorControls;