DragControls: Add support for multiple groups. #27791

narenjoriona · 2024-02-21T09:47:48Z

Fixed Group drag and drop issue.

Related issue: Multiple Group not able to control using DragControls .

Description

Existing code can drag only one group. In this fix we can drag multiple group in scene.

Fixed Group drag and drop issue. Existing code can drag only one group now we can drag multiple group in scene.

Mugen87 · 2024-02-21T10:11:54Z

Do you mind demonstrating the issue you are fixing with a live example (https://jsfiddle.net/g3atw6k5/)?

narenjoriona · 2024-02-21T10:39:02Z

Do you mind demonstrating the issue you are fixing with a live example (https://jsfiddle.net/g3atw6k5/)?

https://jsfiddle.net/narenjcs/8ret1b9z/13/
Please check here. There is two group in scene but i can move one one group of mesh only. that is the issue

narenjoriona · 2024-02-21T10:48:50Z

Do you mind demonstrating the issue you are fixing with a live example (https://jsfiddle.net/g3atw6k5/)?

My fix is here https://jsfiddle.net/narenjcs/jst15v34/3/

Mugen87 · 2024-02-21T10:57:21Z

Thanks for sharing the fiddle!

Unfortunately, I can't edit your PR but can you please try it with this updated version of your code?

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 _diff = new Vector2();
const _previousPointer = new Vector2();
const _intersection = new Vector3();
const _worldPosition = new Vector3();
const _inverseMatrix = new Matrix4();

const _up = new Vector3();
const _right = new Vector3();

class DragControls extends EventDispatcher {

	constructor( _objects, _camera, _domElement ) {

		super();

		_domElement.style.touchAction = 'none'; // disable touch scroll

		let _selected = null, _hovered = null;

		const _intersections = [];

		this.mode = 'translate';

		this.rotateSpeed = 1;

		//

		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 ( scope.mode === 'translate' ) {

					if ( _raycaster.ray.intersectPlane( _plane, _intersection ) ) {

						_selected.position.copy( _intersection.sub( _offset ).applyMatrix4( _inverseMatrix ) );

					}

				} else if ( scope.mode === 'rotate' ) {

					_diff.subVectors( _pointer, _previousPointer ).multiplyScalar( scope.rotateSpeed );
					_selected.rotateOnWorldAxis( _up, _diff.x );
					_selected.rotateOnWorldAxis( _right.normalize(), - _diff.y );

				}

				scope.dispatchEvent( { type: 'drag', object: _selected } );

				_previousPointer.copy( _pointer );

			} else {

				// hover support

				if ( event.pointerType === 'mouse' || event.pointerType === 'pen' ) {

					_intersections.length = 0;

					_raycaster.setFromCamera( _pointer, _camera );
					_raycaster.intersectObjects( _objects, scope.recursive, _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;

						}

					}

				}

			}

			_previousPointer.copy( _pointer );

		}

		function onPointerDown( event ) {

			if ( scope.enabled === false ) return;

			updatePointer( event );

			_intersections.length = 0;

			_raycaster.setFromCamera( _pointer, _camera );
			_raycaster.intersectObjects( _objects, scope.recursive, _intersections );

			if ( _intersections.length > 0 ) {

				if ( scope.transformGroup === true ) {

					// look for a group in the object's upper hierarchy

					_selected = findGroup( _intersections[ 0 ].object );

				} else {

					_selected = _intersections[ 0 ].object;

				}

				_plane.setFromNormalAndCoplanarPoint( _camera.getWorldDirection( _plane.normal ), _worldPosition.setFromMatrixPosition( _selected.matrixWorld ) );

				if ( _raycaster.ray.intersectPlane( _plane, _intersection ) ) {

					if ( scope.mode === 'translate' ) {

						_inverseMatrix.copy( _selected.parent.matrixWorld ).invert();
						_offset.copy( _intersection ).sub( _worldPosition.setFromMatrixPosition( _selected.matrixWorld ) );

					} else if ( scope.mode === 'rotate' ) {

						// the controls only support Y+ up
						_up.set( 0, 1, 0 ).applyQuaternion( _camera.quaternion ).normalize();
						_right.set( 1, 0, 0 ).applyQuaternion( _camera.quaternion ).normalize();

					}

				}

				_domElement.style.cursor = 'move';

				scope.dispatchEvent( { type: 'dragstart', object: _selected } );

			}

			_previousPointer.copy( _pointer );

		}

		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;

		}

		function findGroup( obj ) {

			if ( obj.isGroup ) {

				return obj;

			} else {

				if ( obj.parent === null ) {

					throw new Error( 'DragControls: No group parent found. ' );

				}

				return findGroup( obj.parent );

			}

		}

		activate();

		// API

		this.enabled = true;
		this.recursive = true;
		this.transformGroup = false;

		this.activate = activate;
		this.deactivate = deactivate;
		this.dispose = dispose;
		this.getObjects = getObjects;
		this.getRaycaster = getRaycaster;

	}

}

export { DragControls };

Would this also work for you?

In general, the issue is clear now since DragControls only supports a single group right now. The idea of the PR is to search for the first group object in its ancestor nodes and then apply any transformation to it.

narenjoriona · 2024-02-21T11:17:50Z

Thanks for sharing the fiddle!

Unfortunately, I can't edit your PR but can you please try it with this updated version of your code?

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 _diff = new Vector2();
const _previousPointer = new Vector2();
const _intersection = new Vector3();
const _worldPosition = new Vector3();
const _inverseMatrix = new Matrix4();

const _up = new Vector3();
const _right = new Vector3();

class DragControls extends EventDispatcher {

	constructor( _objects, _camera, _domElement ) {

		super();

		_domElement.style.touchAction = 'none'; // disable touch scroll

		let _selected = null, _hovered = null;

		const _intersections = [];

		this.mode = 'translate';

		this.rotateSpeed = 1;

		//

		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 ( scope.mode === 'translate' ) {

					if ( _raycaster.ray.intersectPlane( _plane, _intersection ) ) {

						_selected.position.copy( _intersection.sub( _offset ).applyMatrix4( _inverseMatrix ) );

					}

				} else if ( scope.mode === 'rotate' ) {

					_diff.subVectors( _pointer, _previousPointer ).multiplyScalar( scope.rotateSpeed );
					_selected.rotateOnWorldAxis( _up, _diff.x );
					_selected.rotateOnWorldAxis( _right.normalize(), - _diff.y );

				}

				scope.dispatchEvent( { type: 'drag', object: _selected } );

				_previousPointer.copy( _pointer );

			} else {

				// hover support

				if ( event.pointerType === 'mouse' || event.pointerType === 'pen' ) {

					_intersections.length = 0;

					_raycaster.setFromCamera( _pointer, _camera );
					_raycaster.intersectObjects( _objects, scope.recursive, _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;

						}

					}

				}

			}

			_previousPointer.copy( _pointer );

		}

		function onPointerDown( event ) {

			if ( scope.enabled === false ) return;

			updatePointer( event );

			_intersections.length = 0;

			_raycaster.setFromCamera( _pointer, _camera );
			_raycaster.intersectObjects( _objects, scope.recursive, _intersections );

			if ( _intersections.length > 0 ) {

				if ( scope.transformGroup === true ) {

					// look for a group in the object's upper hierarchy

					_selected = findGroup( _intersections[ 0 ].object );

				} else {

					_selected = _intersections[ 0 ].object;

				}

				_plane.setFromNormalAndCoplanarPoint( _camera.getWorldDirection( _plane.normal ), _worldPosition.setFromMatrixPosition( _selected.matrixWorld ) );

				if ( _raycaster.ray.intersectPlane( _plane, _intersection ) ) {

					if ( scope.mode === 'translate' ) {

						_inverseMatrix.copy( _selected.parent.matrixWorld ).invert();
						_offset.copy( _intersection ).sub( _worldPosition.setFromMatrixPosition( _selected.matrixWorld ) );

					} else if ( scope.mode === 'rotate' ) {

						// the controls only support Y+ up
						_up.set( 0, 1, 0 ).applyQuaternion( _camera.quaternion ).normalize();
						_right.set( 1, 0, 0 ).applyQuaternion( _camera.quaternion ).normalize();

					}

				}

				_domElement.style.cursor = 'move';

				scope.dispatchEvent( { type: 'dragstart', object: _selected } );

			}

			_previousPointer.copy( _pointer );

		}

		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;

		}

		function findGroup( obj ) {

			if ( obj.isGroup ) {

				return obj;

			} else {

				if ( obj.parent === null ) {

					throw new Error( 'DragControls: No group parent found. ' );

				}

				return findGroup( obj.parent );

			}

		}

		activate();

		// API

		this.enabled = true;
		this.recursive = true;
		this.transformGroup = false;

		this.activate = activate;
		this.deactivate = deactivate;
		this.dispose = dispose;
		this.getObjects = getObjects;
		this.getRaycaster = getRaycaster;

	}

}

export { DragControls };

Would this also work for you?

In general, the issue is clear now since DragControls only supports a single group right now. The idea of the PR is to search for the first group object in its ancestor nodes and then apply any transformation to it.

https://jsfiddle.net/narenjcs/m0gauchs/8/ In this example there is three cube in one group but that red cube only i can drag it, but i want to move all three cube

Mugen87 · 2024-02-21T11:48:00Z

How about this: https://jsfiddle.net/w97z2d4q/

Now the controls pick the outermost group.

narenjoriona · 2024-02-21T11:56:59Z

How about this: https://jsfiddle.net/w97z2d4q/

Now the controls pick the outermost group.

Yes Its fine and thanks

Mugen87 · 2024-02-21T12:04:14Z

Would you like to update your PR with that version of DragControls?

narenjoriona · 2024-02-21T12:06:03Z

Would you like to update your PR with that version of DragControls?

Yes I like to update PR with that version of DragControls

Mugen87 · 2024-02-21T13:21:03Z

The description of DragControls.transformGroup needs an update: https://threejs.org/docs/index.html#examples/en/controls/DragControls.transformGroup

Right now, the property assume only a single group is supported. With this PR, multiple groups can be dragged. This documentation should reflect this change.

narenjoriona · 2024-02-24T10:49:25Z

Hi @Mugen87 Can you add below code for update object dynamically
function updateObject(_newObject){
_objects = _newObject
}

Mugen87 · 2024-02-24T11:12:51Z

_objects is an array of objects. What is _newObject supposed to be?

I've also seen the PR isn't updated with the suggested changes yet (see #27791 (comment)). Would you mind doing this?

narenjoriona · 2024-02-24T13:20:21Z

_objects is an array of objects. What is _newObject supposed to be?

I've also seen the PR isn't updated with the suggested changes yet (see #27791 (comment)). Would you mind doing this?

Sorry, I have updated latest code and _newObject is array of object(Mesh or Group)

examples/jsm/controls/DragControls.js

Update DragControls.js

9a8c4c6

Fixed Group drag and drop issue. Existing code can drag only one group now we can drag multiple group in scene.

Mugen87 changed the title ~~Update DragControls.js~~ Feb 21, 2024

Added new updateObject function for dynamically update objects

c163afb

Mugen87 reviewed Feb 24, 2024

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function name updated as per review comment

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github-advanced-security bot found potential problems Feb 24, 2024

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examples/jsm/controls/DragControls.js Fixed Show fixed Hide fixed

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Mugen87 approved these changes Feb 26, 2024

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Mugen87 merged commit c825051 into mrdoob:dev Feb 26, 2024
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Mugen87 added this to the r162 milestone Feb 26, 2024

Mugen87 mentioned this pull request Feb 26, 2024

Docs: Improve DragControls page. #27822

Merged

This was referenced Feb 27, 2024

DragControls: Add support for multiple groups. three-types/three-ts-types#847

Merged

r162 three-types/three-ts-types#811

Closed

Mugen87 mentioned this pull request Jun 17, 2024

161 -> 162 DragControls breaks for multiple groups #28681

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DragControls: Add support for multiple groups. #27791

DragControls: Add support for multiple groups. #27791

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