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205 lines
4.7 KiB
205 lines
4.7 KiB
( function () {
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const _plane = new THREE.Plane();
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const _raycaster = new THREE.Raycaster();
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const _pointer = new THREE.Vector2();
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const _offset = new THREE.Vector3();
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const _intersection = new THREE.Vector3();
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const _worldPosition = new THREE.Vector3();
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const _inverseMatrix = new THREE.Matrix4();
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class DragControls extends THREE.EventDispatcher {
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constructor( _objects, _camera, _domElement ) {
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super();
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_domElement.style.touchAction = 'none'; // disable touch scroll
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let _selected = null,
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_hovered = null;
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const _intersections = [];
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//
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const scope = this;
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function activate() {
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_domElement.addEventListener( 'pointermove', onPointerMove );
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_domElement.addEventListener( 'pointerdown', onPointerDown );
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_domElement.addEventListener( 'pointerup', onPointerCancel );
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_domElement.addEventListener( 'pointerleave', onPointerCancel );
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}
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function deactivate() {
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_domElement.removeEventListener( 'pointermove', onPointerMove );
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_domElement.removeEventListener( 'pointerdown', onPointerDown );
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_domElement.removeEventListener( 'pointerup', onPointerCancel );
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_domElement.removeEventListener( 'pointerleave', onPointerCancel );
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_domElement.style.cursor = '';
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}
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function dispose() {
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deactivate();
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}
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function getObjects() {
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return _objects;
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}
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function getRaycaster() {
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return _raycaster;
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}
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function onPointerMove( event ) {
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if ( scope.enabled === false ) return;
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updatePointer( event );
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_raycaster.setFromCamera( _pointer, _camera );
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if ( _selected ) {
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if ( _raycaster.ray.intersectPlane( _plane, _intersection ) ) {
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_selected.position.copy( _intersection.sub( _offset ).applyMatrix4( _inverseMatrix ) );
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}
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scope.dispatchEvent( {
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type: 'drag',
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object: _selected
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} );
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return;
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}
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// hover support
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if ( event.pointerType === 'mouse' || event.pointerType === 'pen' ) {
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_intersections.length = 0;
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_raycaster.setFromCamera( _pointer, _camera );
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_raycaster.intersectObjects( _objects, true, _intersections );
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if ( _intersections.length > 0 ) {
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const object = _intersections[ 0 ].object;
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_plane.setFromNormalAndCoplanarPoint( _camera.getWorldDirection( _plane.normal ), _worldPosition.setFromMatrixPosition( object.matrixWorld ) );
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if ( _hovered !== object && _hovered !== null ) {
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scope.dispatchEvent( {
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type: 'hoveroff',
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object: _hovered
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} );
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_domElement.style.cursor = 'auto';
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_hovered = null;
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}
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if ( _hovered !== object ) {
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scope.dispatchEvent( {
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type: 'hoveron',
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object: object
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} );
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_domElement.style.cursor = 'pointer';
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_hovered = object;
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}
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} else {
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if ( _hovered !== null ) {
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scope.dispatchEvent( {
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type: 'hoveroff',
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object: _hovered
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} );
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_domElement.style.cursor = 'auto';
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_hovered = null;
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}
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}
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}
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}
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function onPointerDown( event ) {
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if ( scope.enabled === false ) return;
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updatePointer( event );
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_intersections.length = 0;
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_raycaster.setFromCamera( _pointer, _camera );
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_raycaster.intersectObjects( _objects, true, _intersections );
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if ( _intersections.length > 0 ) {
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_selected = scope.transformGroup === true ? _objects[ 0 ] : _intersections[ 0 ].object;
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_plane.setFromNormalAndCoplanarPoint( _camera.getWorldDirection( _plane.normal ), _worldPosition.setFromMatrixPosition( _selected.matrixWorld ) );
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if ( _raycaster.ray.intersectPlane( _plane, _intersection ) ) {
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_inverseMatrix.copy( _selected.parent.matrixWorld ).invert();
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_offset.copy( _intersection ).sub( _worldPosition.setFromMatrixPosition( _selected.matrixWorld ) );
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}
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_domElement.style.cursor = 'move';
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scope.dispatchEvent( {
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type: 'dragstart',
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object: _selected
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} );
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}
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}
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function onPointerCancel() {
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if ( scope.enabled === false ) return;
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if ( _selected ) {
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scope.dispatchEvent( {
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type: 'dragend',
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object: _selected
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} );
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_selected = null;
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}
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_domElement.style.cursor = _hovered ? 'pointer' : 'auto';
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}
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function updatePointer( event ) {
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const rect = _domElement.getBoundingClientRect();
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_pointer.x = ( event.clientX - rect.left ) / rect.width * 2 - 1;
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_pointer.y = - ( event.clientY - rect.top ) / rect.height * 2 + 1;
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}
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activate();
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// API
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this.enabled = true;
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this.transformGroup = false;
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this.activate = activate;
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this.deactivate = deactivate;
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this.dispose = dispose;
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this.getObjects = getObjects;
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this.getRaycaster = getRaycaster;
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}
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}
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THREE.DragControls = DragControls;
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} )();
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