add setAnimationFrame

ios/src/PolyvoxFilamentApi.cpp

@@ -196,6 +196,10 @@ extern "C" {
     ((SceneAsset*)asset)->playAnimation(index, loop, reverse);
   }
 
+  void set_animation_frame(void* asset, int animationIndex, int animationFrame) {
+    ((SceneAsset*)asset)->setAnimationFrame(animationIndex, animationFrame);
+  }
+
   int get_animation_count(void* asset) {
     auto names = ((SceneAsset*)asset)->getAnimationNames();
     return names->size();

ios/src/SceneAsset.cpp

@@ -327,6 +327,12 @@ void SceneAsset::setTexture() {
 
 }
 
+void SceneAsset::setAnimationFrame(int animationIndex, int animationFrame) {
+  auto offset = 60 * animationFrame * 1000; // TODO - don't hardcore 60fps framerate
+  _animator->applyAnimation(animationIndex, offset);
+  _animator->updateBoneMatrices();
+}
+
 void SceneAsset::updateEmbeddedAnimations() {
   auto now = high_resolution_clock::now();
   int animationIndex = 0;