#72 epic refactoring

src/lib/MeshUtils.js

@@ -86,7 +86,46 @@ function bottomOrigin(object){
     return group;
 }
 
+function clearObject(o){
+    let disposables = []
+    o.traverse(object => {
+        if (object.isMesh) {
+            disposables.push(object);
+        }
+        if (object.isLight){
+            object.shadow?.map?.dispose();
+            object.shadow?.dispose();
+            object.dispose();
+        }
+        if (object.userData?._io){
+            object.userData._io.dispose?.();
+        }
+    });
+    disposables.forEach(object=>{
+        object.removeFromParent();
+        object.geometry.dispose();
+        if (object.material.isMaterial) {
+            clearMaterial(object.material)
+        } else {
+            for (const material of object.material) clearMaterial(material)
+        }
+    })
+}
+
+function clearMaterial(material) {
+    material.dispose();
+    for (const key of Object.keys(material)) {
+        const value = material[key]
+        if (value && typeof value == 'object' && 'minFilter' in value) {
+            //console.log('Disposing', value.name, this.renderer.info.memory.textures );
+            value.dispose();
+            //console.log('Disposed', value.name, this.renderer.info.memory.textures );
+        }
+    }
+}
+
 export { 
     assignParams, assignMaterial, autoScale, centerOrigin, wrapInGroup, bottomOrigin,
-    getBoundingBox, getBoundingBoxSize, getBoundingBoxMaxLength, getBoundingBoxCenterPoint 
+    getBoundingBox, getBoundingBoxSize, getBoundingBoxMaxLength, getBoundingBoxCenterPoint,
+    clearObject, clearMaterial
 }