From 3c73e1d7e27643bca6ae2891344906bfc4229b42 Mon Sep 17 00:00:00 2001
From: SeanOMik <seanomik@gmail.com>
Date: Thu, 18 Apr 2024 22:38:15 -0400
Subject: [PATCH] render: only run system_update_world_transforms for scenes
 that were modified

---
 lyra-game/src/render/renderer.rs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lyra-game/src/render/renderer.rs b/lyra-game/src/render/renderer.rs
index 9506e7e..5fbcfdd 100755
--- a/lyra-game/src/render/renderer.rs
+++ b/lyra-game/src/render/renderer.rs
@@ -466,8 +466,10 @@ impl Renderer for BasicRenderer {
 
             if let Some((scene_han, scene_epoch)) = scene_pair {
                 if let Some(scene) = scene_han.data_ref() {
-                    let view = scene.world().view::<(Entities, &mut WorldTransform, &Transform, Not<Has<RelationOriginComponent<ChildOf>>>)>();
-                    lyra_scene::system_update_world_transforms(scene.world(), view).unwrap();
+                    if scene_epoch == last_epoch {
+                        let view = scene.world().view::<(Entities, &mut WorldTransform, &Transform, Not<Has<RelationOriginComponent<ChildOf>>>)>();
+                        lyra_scene::system_update_world_transforms(scene.world(), view).unwrap();
+                    }
 
                     let interpo_pos = self.interpolate_transforms(now_inst, last_epoch, entity, &transform, transform_epoch);