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added gizmo; no interaction with objects yet
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| import { TransformNode } from "@babylonjs/core/Meshes/transformNode"; | ||
| import { Mesh } from "@babylonjs/core/Meshes/mesh"; | ||
| import { Vector3, Quaternion, Color3 } from "@babylonjs/core/Maths/math"; | ||
| import { Scene } from "@babylonjs/core/scene"; | ||
| import { UtilityLayerRenderer } from "@babylonjs/core/Rendering"; | ||
| import { HighlightLayer } from '@babylonjs/core/Layers/highlightLayer'; | ||
| import { Gizmo, PositionGizmo, RotationGizmo, BoundingBoxGizmo } from "@babylonjs/core/Gizmos"; | ||
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| export type Transformation = { | ||
| position: Vector3, | ||
| rotation: Quaternion, | ||
| scaling: Vector3 | ||
| } | ||
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| export enum GizmoMode { | ||
| Translate, | ||
| Rotate, | ||
| Scale | ||
| } | ||
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| export enum GizmoSpace { | ||
| World, | ||
| Local | ||
| } | ||
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| export class GizmoManager { | ||
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| private root: TransformNode; // actual attached node of the gizmo; serves to transfer changes to the meshes | ||
| private initialTransform: Transformation; // transformation of the root before an axis gets dragged; to calculate the difference between start and end of drag | ||
| private inWorldSpace: boolean; // indicates if the gizmo is currently using world orientation | ||
| private nodes: [TransformNode, Transformation][]; // list of meshes and their transformatin currently attached to the gizmo | ||
| private positionGizmo: PositionGizmo; // gizmo for translation | ||
| private rotationGizmo: RotationGizmo; // gizmo for rotation | ||
| //private boundingBoxGizmo: CustomBoundingBoxGizmo; // gizmo for scaling | ||
| private currentGizmo: Gizmo; // the gizmo currently active | ||
| private layer: UtilityLayerRenderer; | ||
| private hlLayer: HighlightLayer; | ||
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| constructor(scene: Scene, thickness?: number, scale?: number) { | ||
| this.root = new TransformNode('GizmoRoot', scene); | ||
| this.layer = new UtilityLayerRenderer(scene); | ||
| this.hlLayer = new HighlightLayer('SelectionHLLayer', scene); | ||
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| this.root.rotationQuaternion = new Quaternion(0, 0, 0, 1); | ||
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| this.initialTransform = { | ||
| position: this.root.position.clone(), | ||
| rotation: this.root.rotationQuaternion.clone(), | ||
| scaling: this.root.scaling.clone(), | ||
| } | ||
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| this.inWorldSpace = false; | ||
| this.nodes = []; | ||
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| this.positionGizmo = new PositionGizmo(this.layer, thickness ?? 1); | ||
| this.positionGizmo.scaleRatio = scale ?? 1; | ||
| //this.initPositionGizmo(); | ||
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| this.rotationGizmo = new RotationGizmo(this.layer, undefined, undefined, thickness ?? 1); | ||
| this.rotationGizmo.scaleRatio = scale ?? 1; | ||
| //this.initRotationGizmo(); | ||
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| //this.boundingBoxGizmo = new CustomBoundingBoxGizmo(bjs.Color3.Gray(), utilLayer, this); | ||
| //this.boundingBoxGizmo.attachedNode = this.root; | ||
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| this.changeMode(GizmoMode.Translate); | ||
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| console.log('Gizmo created') | ||
| } | ||
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| public changeMode(mode: GizmoMode) { | ||
| this.rotationGizmo.attachedNode = null; | ||
| this.positionGizmo.attachedNode = null; | ||
| //this.boundingBoxGizmo.attachedNode = null; | ||
| this.root.scaling = Vector3.One(); | ||
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| switch (mode) { // select the relevant gizmo | ||
| case GizmoMode.Rotate: | ||
| this.currentGizmo = this.rotationGizmo; | ||
| break; | ||
| case GizmoMode.Translate: | ||
| this.currentGizmo = this.positionGizmo; | ||
| break; | ||
| case GizmoMode.Scale: | ||
| //this.currentGizmo = this.boundingBoxGizmo; | ||
| break; | ||
| } | ||
| if (this.nodes.length > 0) { | ||
| this.currentGizmo.attachedNode = this.root; | ||
| //this.boundingBoxGizmo.updateGizmo(); | ||
| } | ||
| } | ||
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| public setRootPosition() { | ||
| if (this.nodes.length > 0) { | ||
| let minmax = this.nodes[0][0].getHierarchyBoundingVectors(true); | ||
| let min = minmax.min; | ||
| let max = minmax.max | ||
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| this.nodes.forEach(n => { | ||
| minmax = n[0].getHierarchyBoundingVectors(true); | ||
| min.minimizeInPlace(minmax.min); | ||
| max.maximizeInPlace(minmax.max); | ||
| }); | ||
| this.root.position = min.add(max).scale(0.5); | ||
| } | ||
| } | ||
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| public setRootRotation() { | ||
| if (this.nodes.length == 1 && !this.inWorldSpace) { | ||
| this.root.rotationQuaternion = this.nodes[0][1].rotation.clone() | ||
| } | ||
| else { | ||
| this.root.rotationQuaternion.set(0, 0, 0, 1); | ||
| } | ||
| } | ||
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| public addNode(node: TransformNode) { | ||
| if (!this.nodes.find(n => n[0].name == node.name)) { // only add node if it wasn't already attached | ||
| node.computeWorldMatrix(true); | ||
| // add the node to the list of attached nodes, together with its world matrix | ||
| if (node.rotationQuaternion == null) { | ||
| node.rotationQuaternion = Quaternion.Identity(); | ||
| } | ||
| this.nodes.push([node, { | ||
| position: node.position.clone(), | ||
| rotation: node.rotationQuaternion.clone(), | ||
| scaling: node.scaling.clone() | ||
| }]); | ||
| this.hlLayer.addMesh(node as Mesh, new Color3(1, 0.7, 0)); | ||
| this.setRootPosition(); | ||
| this.setRootRotation(); | ||
| this.currentGizmo.attachedNode = this.root; | ||
| } | ||
| //if (this.currentGizmo == this.boundingBoxGizmo) { // if scaling is selected update the bounding box | ||
| // this.boundingBoxGizmo.updateGizmo(); | ||
| //} | ||
| } | ||
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| public removeNode(node: TransformNode) { | ||
| let i = this.nodes.indexOf(this.nodes.find(n => n[0].name == node.name)); | ||
| this.hlLayer.removeMesh(node as Mesh); | ||
| this.nodes.splice(i, 1); | ||
| if (this.nodes.length < 1) { | ||
| this.currentGizmo.attachedNode = null; | ||
| } | ||
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| this.setRootPosition(); | ||
| this.setRootRotation(); | ||
| } | ||
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| public removeAllNodes() { | ||
| this.nodes = []; | ||
| this.hlLayer.removeAllMeshes(); | ||
| this.currentGizmo.attachedNode = null; | ||
| } | ||
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| } |
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