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+module BABYLON {
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+ /**
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+ * Bounding box gizmo
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+ */
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+ export class BoundingBoxGizmo extends Gizmo {
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+ private _lineBoundingBox:AbstractMesh;
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+ private _rotateSpheresParent:AbstractMesh;
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+ private _scaleBoxesParent:AbstractMesh;
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+ private _boundingDimensions = new BABYLON.Vector3(1,1,1);
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+
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+ /**
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+ * Creates an BoundingBoxGizmo
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+ * @param gizmoLayer The utility layer the gizmo will be added to
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+ * @param dragAxis The axis which the gizmo will be able to drag on
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+ * @param color The color of the gizmo
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+ */
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+ constructor(gizmoLayer:UtilityLayerRenderer, dragAxis:Vector3, color:Color3){
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+ super(gizmoLayer);
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+
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+ // Do not update the gizmo's scale so it has a fixed size to the object its attached to
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+ this._updateScale = false
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+
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+ // Create Material
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+ var coloredMaterial = new BABYLON.StandardMaterial("", gizmoLayer.utilityLayerScene);
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+ coloredMaterial.disableLighting = true;
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+ coloredMaterial.emissiveColor = color;
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+
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+ // Build bounding box out of lines
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+ this._lineBoundingBox = new BABYLON.AbstractMesh("", gizmoLayer.utilityLayerScene);
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+ this._lineBoundingBox.rotationQuaternion = new BABYLON.Quaternion();
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+ var lines = []
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+ lines.push(BABYLON.MeshBuilder.CreateLines("lines", {points: [new BABYLON.Vector3(0,0,0), new BABYLON.Vector3(this._boundingDimensions.x,0,0)]}, gizmoLayer.utilityLayerScene));
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+ lines.push(BABYLON.MeshBuilder.CreateLines("lines", {points: [new BABYLON.Vector3(0,0,0), new BABYLON.Vector3(0,this._boundingDimensions.y,0)]}, gizmoLayer.utilityLayerScene));
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+ lines.push(BABYLON.MeshBuilder.CreateLines("lines", {points: [new BABYLON.Vector3(0,0,0), new BABYLON.Vector3(0,0,this._boundingDimensions.z)]}, gizmoLayer.utilityLayerScene));
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+ lines.push(BABYLON.MeshBuilder.CreateLines("lines", {points: [new BABYLON.Vector3(this._boundingDimensions.x,0,0), new BABYLON.Vector3(this._boundingDimensions.x,this._boundingDimensions.y,0)]}, gizmoLayer.utilityLayerScene));
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+ lines.push(BABYLON.MeshBuilder.CreateLines("lines", {points: [new BABYLON.Vector3(this._boundingDimensions.x,0,0), new BABYLON.Vector3(this._boundingDimensions.x,0,this._boundingDimensions.z)]}, gizmoLayer.utilityLayerScene));
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+ lines.push(BABYLON.MeshBuilder.CreateLines("lines", {points: [new BABYLON.Vector3(0,this._boundingDimensions.y,0), new BABYLON.Vector3(this._boundingDimensions.x,this._boundingDimensions.y,0)]}, gizmoLayer.utilityLayerScene));
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+ lines.push(BABYLON.MeshBuilder.CreateLines("lines", {points: [new BABYLON.Vector3(0,this._boundingDimensions.y,0), new BABYLON.Vector3(0,this._boundingDimensions.y,this._boundingDimensions.z)]}, gizmoLayer.utilityLayerScene));
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+ lines.push(BABYLON.MeshBuilder.CreateLines("lines", {points: [new BABYLON.Vector3(0,0,this._boundingDimensions.z), new BABYLON.Vector3(this._boundingDimensions.x,0,this._boundingDimensions.z)]}, gizmoLayer.utilityLayerScene));
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+ lines.push(BABYLON.MeshBuilder.CreateLines("lines", {points: [new BABYLON.Vector3(0,0,this._boundingDimensions.z), new BABYLON.Vector3(0,this._boundingDimensions.y,this._boundingDimensions.z)]}, gizmoLayer.utilityLayerScene));
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+ lines.push(BABYLON.MeshBuilder.CreateLines("lines", {points: [new BABYLON.Vector3(this._boundingDimensions.x,this._boundingDimensions.y,this._boundingDimensions.z), new BABYLON.Vector3(0,this._boundingDimensions.y,this._boundingDimensions.z)]}, gizmoLayer.utilityLayerScene));
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+ lines.push(BABYLON.MeshBuilder.CreateLines("lines", {points: [new BABYLON.Vector3(this._boundingDimensions.x,this._boundingDimensions.y,this._boundingDimensions.z), new BABYLON.Vector3(this._boundingDimensions.x,0,this._boundingDimensions.z)]}, gizmoLayer.utilityLayerScene));
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+ lines.push(BABYLON.MeshBuilder.CreateLines("lines", {points: [new BABYLON.Vector3(this._boundingDimensions.x,this._boundingDimensions.y,this._boundingDimensions.z), new BABYLON.Vector3(this._boundingDimensions.x,this._boundingDimensions.y,0)]}, gizmoLayer.utilityLayerScene));
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+ lines.forEach((l)=>{
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+ l.color = color
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+ l.position.addInPlace(new BABYLON.Vector3(-this._boundingDimensions.x/2,-this._boundingDimensions.y/2,-this._boundingDimensions.z/2))
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+ l.isPickable=false;
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+ this._lineBoundingBox.addChild(l)
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+ })
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+ this._rootMesh.addChild(this._lineBoundingBox);
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+
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+ // Create rotation spheres
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+ this._rotateSpheresParent = new BABYLON.AbstractMesh("", gizmoLayer.utilityLayerScene);
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+ this._rotateSpheresParent.rotationQuaternion = new Quaternion();
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+ for(let i=0;i<12;i++){
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+ let sphere = BABYLON.MeshBuilder.CreateSphere("", {diameter: 0.1}, gizmoLayer.utilityLayerScene);
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+ sphere.rotationQuaternion = new Quaternion();
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+ sphere.material = coloredMaterial;
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+ var _dragBehavior = new PointerDragBehavior({});
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+ _dragBehavior.moveAttached = false;
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+ sphere.addBehavior(_dragBehavior);
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+ _dragBehavior.onDragObservable.add((event)=>{
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+ if(this.attachedMesh){
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+ var worldDragDirection = sphere.forward;
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+
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+ // project the world right on to the drag plane
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+ var toSub = event.dragPlaneNormal.scale(Vector3.Dot(event.dragPlaneNormal, worldDragDirection));
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+ var dragAxis = worldDragDirection.subtract(toSub).normalizeToNew();
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+
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+ // project drag delta on to the resulting drag axis and rotate based on that
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+ var projectDist = Vector3.Dot(dragAxis, event.delta);
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+
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+ // Rotate based on axis
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+ if(i>=8){
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+ this.attachedMesh.rotation.z -= projectDist;
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+ }else if(i>=4){
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+ this.attachedMesh.rotation.y -= projectDist;
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+ }else{
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+ this.attachedMesh.rotation.x -= projectDist;
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+ }
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+ }
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+ });
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+
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+ // Selection/deselection
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+ _dragBehavior.onDragStartObservable.add(()=>{
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+ this._selectNode(sphere)
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+ })
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+ _dragBehavior.onDragEndObservable.add(()=>{
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+ this._selectNode(null)
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+ })
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+
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+ this._rotateSpheresParent.addChild(sphere);
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+ }
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+ this._rootMesh.addChild(this._rotateSpheresParent);
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+
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+ // Create scale cubes
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+ this._scaleBoxesParent = new BABYLON.AbstractMesh("", gizmoLayer.utilityLayerScene);
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+ this._scaleBoxesParent.rotationQuaternion = new Quaternion();
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+ for(var i=0;i<2;i++){
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+ for(var j=0;j<2;j++){
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+ for(var k=0;k<2;k++){
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+ let box = BABYLON.MeshBuilder.CreateBox("", {size: 0.1}, gizmoLayer.utilityLayerScene);
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+ box.material = coloredMaterial;
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+
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+ // Dragging logic
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+ var _dragBehavior = new PointerDragBehavior({dragAxis: new BABYLON.Vector3(i==0?-1:1,j==0?-1:1,k==0?-1:1)});
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+ _dragBehavior.moveAttached = false;
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+ box.addBehavior(_dragBehavior);
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+ _dragBehavior.onDragObservable.add((event)=>{
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+ if(this.attachedMesh){
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+ this.attachedMesh.scaling.addInPlace(new Vector3(event.dragDistance,event.dragDistance,event.dragDistance));
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+ }
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+ })
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+
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+ // Selection/deselection
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+ _dragBehavior.onDragStartObservable.add(()=>{
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+ this._selectNode(box)
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+ })
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+ _dragBehavior.onDragEndObservable.add(()=>{
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+ this._selectNode(null)
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+ })
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+
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+ this._scaleBoxesParent.addChild(box);
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+ }
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+ }
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+ }
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+ this._rootMesh.addChild(this._scaleBoxesParent);
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+
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+ // Update bounding box positions
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+ this.gizmoLayer.originalScene.onBeforeRenderObservable.add(()=>{
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+ if(this.attachedMesh){
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+ var boundingInfo = this.attachedMesh.getBoundingInfo().boundingBox;
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+ var boundBoxDimensions = boundingInfo.maximum.subtract(boundingInfo.minimum).multiplyInPlace(this.attachedMesh.scaling);
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+ this._boundingDimensions.copyFrom(boundBoxDimensions);
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+ this._lineBoundingBox.scaling.copyFrom(this._boundingDimensions);
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+ if(!this.attachedMesh.rotationQuaternion){
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+ this.attachedMesh.rotationQuaternion = new BABYLON.Quaternion();
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+ }
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+ this._lineBoundingBox.rotationQuaternion!.copyFrom(this.attachedMesh.rotationQuaternion);
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+ this._rotateSpheresParent.rotationQuaternion!.copyFrom(this.attachedMesh.rotationQuaternion);
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+ this._scaleBoxesParent.rotationQuaternion!.copyFrom(this.attachedMesh.rotationQuaternion);
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+ this._updateBoundingBox();
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+ }
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+ })
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+ this._updateBoundingBox();
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+ }
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+
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+ private _selectNode(selectedMesh:Nullable<Mesh>){
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+ this._rotateSpheresParent.getChildMeshes()
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+ .concat(this._scaleBoxesParent.getChildMeshes()).forEach((m,i)=>{
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+ m.isVisible = (!selectedMesh || m == selectedMesh);
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+ })
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+ }
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+
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+ private _updateBoundingBox(){
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+ var rotateSpheres = this._rotateSpheresParent.getChildMeshes();
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+ for(var i=0;i<3;i++){
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+ for(var j=0;j<2;j++){
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+ for(var k=0;k<2;k++){
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+ var index= ((i*4)+(j*2))+k
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+ if(i==0){
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+ rotateSpheres[index].position.set(this._boundingDimensions.x/2,this._boundingDimensions.y*j,this._boundingDimensions.z*k);
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+ rotateSpheres[index].position.addInPlace(new BABYLON.Vector3(-this._boundingDimensions.x/2,-this._boundingDimensions.y/2,-this._boundingDimensions.z/2));
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+ rotateSpheres[index].lookAt(Vector3.Cross(Vector3.Right(), rotateSpheres[index].position.normalizeToNew()).normalizeToNew().add(rotateSpheres[index].position));
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+ }
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+ if(i==1){
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+ rotateSpheres[index].position.set(this._boundingDimensions.x*j,this._boundingDimensions.y/2,this._boundingDimensions.z*k);
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+ rotateSpheres[index].position.addInPlace(new BABYLON.Vector3(-this._boundingDimensions.x/2,-this._boundingDimensions.y/2,-this._boundingDimensions.z/2));
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+ rotateSpheres[index].lookAt(Vector3.Cross(Vector3.Up(), rotateSpheres[index].position.normalizeToNew()).normalizeToNew().add(rotateSpheres[index].position));
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+ }
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+ if(i==2){
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+ rotateSpheres[index].position.set(this._boundingDimensions.x*j,this._boundingDimensions.y*k,this._boundingDimensions.z/2);
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+ rotateSpheres[index].position.addInPlace(new BABYLON.Vector3(-this._boundingDimensions.x/2,-this._boundingDimensions.y/2,-this._boundingDimensions.z/2));
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+ rotateSpheres[index].lookAt(Vector3.Cross(Vector3.Forward(), rotateSpheres[index].position.normalizeToNew()).normalizeToNew().add(rotateSpheres[index].position));
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+ }
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+ }
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+ }
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+ }
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+
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+ var scaleBoxes = this._scaleBoxesParent.getChildMeshes();
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+ for(var i=0;i<2;i++){
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+ for(var j=0;j<2;j++){
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+ for(var k=0;k<2;k++){
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+ var index= ((i*4)+(j*2))+k;
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+ if(scaleBoxes[index]){
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+ scaleBoxes[index].position.set(this._boundingDimensions.x*i,this._boundingDimensions.y*j,this._boundingDimensions.z*k);
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+ scaleBoxes[index].position.addInPlace(new BABYLON.Vector3(-this._boundingDimensions.x/2,-this._boundingDimensions.y/2,-this._boundingDimensions.z/2));
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+ }
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+ }
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+ }
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+ }
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+ }
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+
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+ /**
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+ * Disposes of the gizmo
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+ */
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+ public dispose(){
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+ super.dispose();
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+ }
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+ }
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+}
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Trevor Baron