fix: primitive element should not dispose underlying object

Author: nartc

libs/angular-three/src/lib/renderer/state.ts

@@ -202,6 +202,7 @@ export class NgtRendererStore {
     applyProperty(node: NgtRendererNode, name: string, value: any) {
         if (node.__ngt_renderer__[NgtRendererClassId.destroyed]) return;
         // setup [ref] here
+        // ref should never change
         if (name === SPECIAL_PROPERTIES.REF && is.ref(value)) {
             node.__ngt_renderer__[NgtRendererClassId.ref] = value;
             value.nativeElement = node;

libs/angular-three/src/lib/renderer/utils.ts

@@ -126,7 +126,7 @@ export function removeThreeChild(parent: NgtInstanceNode, child: NgtInstanceNode
     }
 
     // dispose
-    if (child['dispose'] && !is.scene(child)) {
+    if (!isPrimitive && child['dispose'] && !is.scene(child)) {
         queueMicrotask(() => child['dispose']());
     }