support parented camera

dist/preview release/what's new.md

@@ -108,6 +108,7 @@
 - MakeNotPickableAndWrapInBoundingBox had unexpected behavior when input had scaling of 0 on an axis ([TrevorDev](https://github.com/TrevorDev))
 - Fixed an issue with loading base64 encoded images in the glTF loader ([bghgary](https://github.com/bghgary))
 - In multi-camera scenes the inspector would cause the camera's interaction events to get detached ([TrevorDev](https://github.com/TrevorDev))
+- SixDofDragBehavior will support when the camera is parented ([TrevorDev](https://github.com/TrevorDev))
 
 ### Core Engine
 - Fixed a bug with `mesh.alwaysSelectAsActiveMesh` preventing layerMask to be taken in account ([Deltakosh](https://github.com/deltakosh))

src/Behaviors/Mesh/babylon.sixDofDragBehavior.ts

@@ -16,7 +16,11 @@ module BABYLON {
         /**
          * How much faster the object should move when the controller is moving towards it. This is useful to bring objects that are far away from the user to them faster. Set this to 0 to avoid any speed increase. (Default: 3)
          */
-         private zDragFactor = 3;
+        private zDragFactor = 3;
+        /**
+         * If the object should rotate to face the drag origin
+         */
+        public rotateDraggedObject = true;
         /**
          * If the behavior is currently in a dragging state
          */
@@ -90,7 +94,7 @@ module BABYLON {
                 if (pointerInfo.type == BABYLON.PointerEventTypes.POINTERDOWN) {
                     if (!this.dragging && pointerInfo.pickInfo && pointerInfo.pickInfo.hit && pointerInfo.pickInfo.pickedMesh && pointerInfo.pickInfo.ray && pickPredicate(pointerInfo.pickInfo.pickedMesh)) {
                         if (this._scene.activeCamera && this._scene.activeCamera.cameraRigMode == Camera.RIG_MODE_NONE) {
-                            pointerInfo.pickInfo.ray.origin.copyFrom(this._scene.activeCamera!.position);
+                            pointerInfo.pickInfo.ray.origin.copyFrom(this._scene.activeCamera!.globalPosition);
                         }
 
                         pickedMesh = this._ownerNode;
@@ -149,7 +153,7 @@ module BABYLON {
                     if (this.currentDraggingPointerID == (<PointerEvent>pointerInfo.event).pointerId && this.dragging && pointerInfo.pickInfo && pointerInfo.pickInfo.ray && pickedMesh) {
                         var zDragFactor = this.zDragFactor;
                         if (this._scene.activeCamera && this._scene.activeCamera.cameraRigMode == Camera.RIG_MODE_NONE) {
-                            pointerInfo.pickInfo.ray.origin.copyFrom(this._scene.activeCamera!.position);
+                            pointerInfo.pickInfo.ray.origin.copyFrom(this._scene.activeCamera!.globalPosition);
                             zDragFactor = 0;
                         }
 
@@ -192,21 +196,23 @@ module BABYLON {
                     // Slowly move mesh to avoid jitter
                     pickedMesh.position.addInPlace(this._targetPosition.subtract(pickedMesh.position).scale(this.dragDeltaRatio));
 
-                    // Get change in rotation
-                    tmpQuaternion.copyFrom(this._startingOrientation);
-                    tmpQuaternion.x = -tmpQuaternion.x;
-                    tmpQuaternion.y = -tmpQuaternion.y;
-                    tmpQuaternion.z = -tmpQuaternion.z;
-                    this._virtualDragMesh.rotationQuaternion!.multiplyToRef(tmpQuaternion, tmpQuaternion);
-                    // Convert change in rotation to only y axis rotation
-                    Quaternion.RotationYawPitchRollToRef(tmpQuaternion.toEulerAngles("xyz").y, 0, 0, tmpQuaternion);
-                    tmpQuaternion.multiplyToRef(this._startingOrientation, tmpQuaternion);
-                    // Slowly move mesh to avoid jitter
-                    var oldParent = pickedMesh.parent;
-                    pickedMesh.setParent(null);
-                    Quaternion.SlerpToRef(pickedMesh.rotationQuaternion!, tmpQuaternion, this.dragDeltaRatio, pickedMesh.rotationQuaternion!);
-                    pickedMesh.setParent(oldParent);
-                    BoundingBoxGizmo._RestorePivotPoint(pickedMesh);
+                    if (this.rotateDraggedObject) {
+                        // Get change in rotation
+                        tmpQuaternion.copyFrom(this._startingOrientation);
+                        tmpQuaternion.x = -tmpQuaternion.x;
+                        tmpQuaternion.y = -tmpQuaternion.y;
+                        tmpQuaternion.z = -tmpQuaternion.z;
+                        this._virtualDragMesh.rotationQuaternion!.multiplyToRef(tmpQuaternion, tmpQuaternion);
+                        // Convert change in rotation to only y axis rotation
+                        Quaternion.RotationYawPitchRollToRef(tmpQuaternion.toEulerAngles("xyz").y, 0, 0, tmpQuaternion);
+                        tmpQuaternion.multiplyToRef(this._startingOrientation, tmpQuaternion);
+                        // Slowly move mesh to avoid jitter
+                        var oldParent = pickedMesh.parent;
+                        pickedMesh.setParent(null);
+                        Quaternion.SlerpToRef(pickedMesh.rotationQuaternion!, tmpQuaternion, this.dragDeltaRatio, pickedMesh.rotationQuaternion!);
+                        pickedMesh.setParent(oldParent);
+                        BoundingBoxGizmo._RestorePivotPoint(pickedMesh);
+                    }
                 }
             });
         }