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