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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 / http://github.com/WestLangley
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+ */
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+
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+import {
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+ Box3,
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+ EventDispatcher,
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+ Matrix3,
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+ Sphere,
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+ Spherical,
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+ Vector2,
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+ Vector3
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+} from "../../../build/three.module.js";
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+
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+var EditorControls = function ( object, domElement ) {
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+
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+ domElement = ( domElement !== undefined ) ? domElement : document;
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+
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+ // API
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+
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+ this.enabled = true;
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+ this.center = new Vector3();
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+ this.panSpeed = 0.002;
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+ this.zoomSpeed = 0.1;
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+ this.rotationSpeed = 0.005;
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+
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+ // internals
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+
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+ var scope = this;
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+ var vector = new Vector3();
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+ var delta = new Vector3();
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+ var box = new Box3();
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+
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+ var STATE = { NONE: - 1, ROTATE: 0, ZOOM: 1, PAN: 2 };
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+ var state = STATE.NONE;
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+
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+ var center = this.center;
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+ var normalMatrix = new Matrix3();
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+ var pointer = new Vector2();
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+ var pointerOld = new Vector2();
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+ var spherical = new Spherical();
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+ var sphere = new Sphere();
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+
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+ // events
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+
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+ var changeEvent = { type: 'change' };
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+
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+ this.focus = function ( target ) {
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+
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+ var distance;
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+
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+ box.setFromObject( target );
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+
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+ if ( box.isEmpty() === false ) {
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+
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+ box.getCenter( center );
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+ distance = box.getBoundingSphere( sphere ).radius;
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+
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+ } else {
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+
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+ // Focusing on an Group, AmbientLight, etc
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+
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+ center.setFromMatrixPosition( target.matrixWorld );
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+ distance = 0.1;
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+
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+ }
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+
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+ delta.set( 0, 0, 1 );
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+ delta.applyQuaternion( object.quaternion );
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+ delta.multiplyScalar( distance * 4 );
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+
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+ object.position.copy( center ).add( delta );
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+
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+ scope.dispatchEvent( changeEvent );
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+
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+ };
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+
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+ this.pan = function ( delta ) {
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+
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+ var distance = object.position.distanceTo( center );
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+
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+ delta.multiplyScalar( distance * scope.panSpeed );
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+ delta.applyMatrix3( normalMatrix.getNormalMatrix( object.matrix ) );
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+
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+ object.position.add( delta );
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+ center.add( delta );
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+
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+ scope.dispatchEvent( changeEvent );
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+
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+ };
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+
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+ this.zoom = function ( delta ) {
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+
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+ var distance = object.position.distanceTo( center );
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+
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+ delta.multiplyScalar( distance * scope.zoomSpeed );
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+
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+ if ( delta.length() > distance ) return;
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+
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+ delta.applyMatrix3( normalMatrix.getNormalMatrix( object.matrix ) );
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+
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+ object.position.add( delta );
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+
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+ scope.dispatchEvent( changeEvent );
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+
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+ };
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+
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+ this.rotate = function ( delta ) {
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+
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+ vector.copy( object.position ).sub( center );
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+
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+ spherical.setFromVector3( vector );
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+
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+ spherical.theta += delta.x * scope.rotationSpeed;
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+ spherical.phi += delta.y * scope.rotationSpeed;
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+
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+ spherical.makeSafe();
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+
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+ vector.setFromSpherical( spherical );
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+
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+ object.position.copy( center ).add( vector );
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+
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+ object.lookAt( center );
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+
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+ scope.dispatchEvent( changeEvent );
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+
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+ };
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+
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+ // mouse
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+
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+ function onMouseDown( event ) {
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+
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+ if ( scope.enabled === false ) return;
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+
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+ if ( event.button === 0 ) {
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+
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+ state = STATE.ROTATE;
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+
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+ } else if ( event.button === 1 ) {
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+
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+ state = STATE.ZOOM;
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+
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+ } else if ( event.button === 2 ) {
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+
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+ state = STATE.PAN;
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+
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+ }
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+
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+ pointerOld.set( event.clientX, event.clientY );
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+
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+ domElement.addEventListener( 'mousemove', onMouseMove, false );
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+ domElement.addEventListener( 'mouseup', onMouseUp, false );
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+ domElement.addEventListener( 'mouseout', onMouseUp, false );
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+ domElement.addEventListener( 'dblclick', onMouseUp, false );
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+
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+ }
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+
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+ function onMouseMove( event ) {
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+
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+ if ( scope.enabled === false ) return;
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+
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+ pointer.set( event.clientX, event.clientY );
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+
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+ var movementX = pointer.x - pointerOld.x;
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+ var movementY = pointer.y - pointerOld.y;
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+
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+ if ( state === STATE.ROTATE ) {
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+
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+ scope.rotate( delta.set( - movementX, - movementY, 0 ) );
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+
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+ } else if ( state === STATE.ZOOM ) {
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+
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+ scope.zoom( delta.set( 0, 0, movementY ) );
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+
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+ } else if ( state === STATE.PAN ) {
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+
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+ scope.pan( delta.set( - movementX, movementY, 0 ) );
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+
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+ }
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+
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+ pointerOld.set( event.clientX, event.clientY );
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+
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+ }
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+
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+ function onMouseUp( event ) {
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+
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+ domElement.removeEventListener( 'mousemove', onMouseMove, false );
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+ domElement.removeEventListener( 'mouseup', onMouseUp, false );
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+ domElement.removeEventListener( 'mouseout', onMouseUp, false );
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+ domElement.removeEventListener( 'dblclick', onMouseUp, false );
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+
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+ state = STATE.NONE;
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+
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+ }
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+
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+ function onMouseWheel( event ) {
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+
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+ event.preventDefault();
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+
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+ // Normalize deltaY due to https://bugzilla.mozilla.org/show_bug.cgi?id=1392460
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+ scope.zoom( delta.set( 0, 0, event.deltaY > 0 ? 1 : - 1 ) );
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+
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+ }
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+
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+ function contextmenu( event ) {
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+
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+ event.preventDefault();
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+
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+ }
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+
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+ this.dispose = function () {
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+
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+ domElement.removeEventListener( 'contextmenu', contextmenu, false );
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+ domElement.removeEventListener( 'mousedown', onMouseDown, false );
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+ domElement.removeEventListener( 'wheel', onMouseWheel, false );
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+
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+ domElement.removeEventListener( 'mousemove', onMouseMove, false );
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+ domElement.removeEventListener( 'mouseup', onMouseUp, false );
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+ domElement.removeEventListener( 'mouseout', onMouseUp, false );
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+ domElement.removeEventListener( 'dblclick', onMouseUp, false );
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+
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+ domElement.removeEventListener( 'touchstart', touchStart, false );
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+ domElement.removeEventListener( 'touchmove', touchMove, false );
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+
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+ };
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+
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+ domElement.addEventListener( 'contextmenu', contextmenu, false );
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+ domElement.addEventListener( 'mousedown', onMouseDown, false );
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+ domElement.addEventListener( 'wheel', onMouseWheel, false );
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+
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+ // touch
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+
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+ var touches = [ new Vector3(), new Vector3(), new Vector3() ];
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+ var prevTouches = [ new Vector3(), new Vector3(), new Vector3() ];
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+
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+ var prevDistance = null;
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+
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+ function touchStart( event ) {
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+
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+ if ( scope.enabled === false ) return;
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+
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+ switch ( event.touches.length ) {
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+
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+ case 1:
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+ touches[ 0 ].set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY, 0 ).divideScalar( window.devicePixelRatio );
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+ touches[ 1 ].set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY, 0 ).divideScalar( window.devicePixelRatio );
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+ break;
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+
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+ case 2:
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+ touches[ 0 ].set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY, 0 ).divideScalar( window.devicePixelRatio );
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+ touches[ 1 ].set( event.touches[ 1 ].pageX, event.touches[ 1 ].pageY, 0 ).divideScalar( window.devicePixelRatio );
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+ prevDistance = touches[ 0 ].distanceTo( touches[ 1 ] );
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+ break;
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+
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+ }
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+
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+ prevTouches[ 0 ].copy( touches[ 0 ] );
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+ prevTouches[ 1 ].copy( touches[ 1 ] );
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+
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+ }
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+
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+
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+ function touchMove( event ) {
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+
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+ if ( scope.enabled === false ) return;
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+
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+ event.preventDefault();
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+ event.stopPropagation();
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+
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+ function getClosest( touch, touches ) {
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+
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+ var closest = touches[ 0 ];
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+
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+ for ( var i in touches ) {
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+
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+ if ( closest.distanceTo( touch ) > touches[ i ].distanceTo( touch ) ) closest = touches[ i ];
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+
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+ }
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+
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+ return closest;
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+
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+ }
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+
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+ switch ( event.touches.length ) {
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+
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+ case 1:
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+ touches[ 0 ].set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY, 0 ).divideScalar( window.devicePixelRatio );
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+ touches[ 1 ].set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY, 0 ).divideScalar( window.devicePixelRatio );
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+ scope.rotate( touches[ 0 ].sub( getClosest( touches[ 0 ], prevTouches ) ).multiplyScalar( - 1 ) );
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+ break;
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+
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+ case 2:
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+ touches[ 0 ].set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY, 0 ).divideScalar( window.devicePixelRatio );
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+ touches[ 1 ].set( event.touches[ 1 ].pageX, event.touches[ 1 ].pageY, 0 ).divideScalar( window.devicePixelRatio );
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+ var distance = touches[ 0 ].distanceTo( touches[ 1 ] );
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+ scope.zoom( delta.set( 0, 0, prevDistance - distance ) );
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+ prevDistance = distance;
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+
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+
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+ var offset0 = touches[ 0 ].clone().sub( getClosest( touches[ 0 ], prevTouches ) );
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+ var offset1 = touches[ 1 ].clone().sub( getClosest( touches[ 1 ], prevTouches ) );
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+ offset0.x = - offset0.x;
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+ offset1.x = - offset1.x;
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+
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+ scope.pan( offset0.add( offset1 ) );
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+
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+ break;
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+
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+ }
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+
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+ prevTouches[ 0 ].copy( touches[ 0 ] );
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+ prevTouches[ 1 ].copy( touches[ 1 ] );
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+
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+ }
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+
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+ domElement.addEventListener( 'touchstart', touchStart, false );
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+ domElement.addEventListener( 'touchmove', touchMove, false );
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+
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+};
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+
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+EditorControls.prototype = Object.create( EventDispatcher.prototype );
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+EditorControls.prototype.constructor = EditorControls;
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+
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+export { EditorControls };
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