[3d] add support to export different formats (#3176)

Co-authored-by: github-actions <github-actions@github.com>

src/extensions/core/load3d/Load3d.ts

@@ -8,6 +8,7 @@ import { ControlsManager } from './ControlsManager'
 import { EventManager } from './EventManager'
 import { LightingManager } from './LightingManager'
 import { LoaderManager } from './LoaderManager'
+import { ModelExporter } from './ModelExporter'
 import { ModelManager } from './ModelManager'
 import { NodeStorage } from './NodeStorage'
 import { PreviewManager } from './PreviewManager'
@@ -225,6 +226,47 @@ class Load3d {
     )
   }
 
+  async exportModel(format: string): Promise<void> {
+    if (!this.modelManager.currentModel) {
+      throw new Error('No model to export')
+    }
+
+    const exportMessage = `Exporting as ${format.toUpperCase()}...`
+    this.eventManager.emitEvent('exportLoadingStart', exportMessage)
+
+    try {
+      const model = this.modelManager.currentModel.clone()
+
+      const originalFileName = this.modelManager.originalFileName || 'model'
+      const filename = `${originalFileName}.${format}`
+
+      const originalURL = this.modelManager.originalURL
+
+      await new Promise((resolve) => setTimeout(resolve, 10))
+
+      switch (format) {
+        case 'glb':
+          await ModelExporter.exportGLB(model, filename, originalURL)
+          break
+        case 'obj':
+          await ModelExporter.exportOBJ(model, filename, originalURL)
+          break
+        case 'stl':
+          await ModelExporter.exportSTL(model, filename), originalURL
+          break
+        default:
+          throw new Error(`Unsupported export format: ${format}`)
+      }
+
+      await new Promise((resolve) => setTimeout(resolve, 10))
+    } catch (error) {
+      console.error(`Error exporting model as ${format}:`, error)
+      throw error
+    } finally {
+      this.eventManager.emitEvent('exportLoadingEnd', null)
+    }
+  }
+
   setBackgroundColor(color: string): void {
     this.sceneManager.setBackgroundColor(color)
     this.forceRender()