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src/babylonjs/AppPositionGizmo.ts

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+import { AbstractMesh } from '@babylonjs/core/Meshes/abstractMesh';
+import { PositionGizmo } from '@babylonjs/core/Gizmos/positionGizmo';
+import { UtilityLayerRenderer } from '@babylonjs/core/Rendering/utilityLayerRenderer';
+import { MainApp } from './MainApp';
+import { Monobehiver } from '../base/Monobehiver';
+
+export class AppPositionGizmo extends Monobehiver {
+    private utilityLayer: UtilityLayerRenderer | null = null;
+    private gizmo: PositionGizmo | null = null;
+    private enabled = true;
+    private rotationEnabled = false;
+    private scaleEnabled = false;
+
+    constructor(mainApp: MainApp) {
+        super(mainApp);
+    }
+
+    Awake(): void {
+        const scene = this.mainApp.appScene.object;
+        if (!scene) return;
+
+        this.utilityLayer = new UtilityLayerRenderer(scene);
+        this.gizmo = new PositionGizmo(this.utilityLayer);
+        this.gizmo.updateGizmoRotationToMatchAttachedMesh = false;
+        this.gizmo.updateGizmoPositionToMatchAttachedMesh = true;
+    }
+
+    setEnabled(enabled: boolean): void {
+        this.enabled = enabled;
+        if (!enabled) {
+            this.detach();
+        }
+    }
+
+    configure(options?: { position?: boolean; rotation?: boolean; scale?: boolean }): void {
+        if (!options) return;
+
+        if (typeof options.position === 'boolean') {
+            this.setEnabled(options.position);
+        }
+
+        if (typeof options.rotation === 'boolean') {
+            this.rotationEnabled = options.rotation;
+        }
+
+        if (typeof options.scale === 'boolean') {
+            this.scaleEnabled = options.scale;
+        }
+    }
+
+    toggle(): void {
+        this.setEnabled(!this.enabled);
+    }
+
+    attach(mesh: AbstractMesh | null): void {
+        if (!this.enabled || !this.gizmo) return;
+        this.gizmo.attachedMesh = mesh;
+    }
+
+    detach(): void {
+        if (this.gizmo) {
+            this.gizmo.attachedMesh = null;
+        }
+    }
+
+    isEnabled(): boolean {
+        return this.enabled;
+    }
+
+    getAttachedMesh(): AbstractMesh | null {
+        return this.gizmo?.attachedMesh ?? null;
+    }
+
+    dispose(): void {
+        this.gizmo?.dispose();
+        this.utilityLayer?.dispose();
+        this.gizmo = null;
+        this.utilityLayer = null;
+    }
+}