From 3b3186ce4aa7db895121ee9ab24a43ee65ed634f Mon Sep 17 00:00:00 2001
From: Kevin Reid <kpreid@switchb.org>
Date: Sun, 24 Nov 2024 10:26:18 -0800
Subject: [PATCH] gpu: Use dirty flag to decide whether to re-trace in
 `RaytraceToTexture`.

---
 all-is-cubes-gpu/src/in_wgpu/raytrace_to_texture.rs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/all-is-cubes-gpu/src/in_wgpu/raytrace_to_texture.rs b/all-is-cubes-gpu/src/in_wgpu/raytrace_to_texture.rs
index 2d44c45cf..da1c701f4 100644
--- a/all-is-cubes-gpu/src/in_wgpu/raytrace_to_texture.rs
+++ b/all-is-cubes-gpu/src/in_wgpu/raytrace_to_texture.rs
@@ -132,8 +132,9 @@ impl RaytraceToTexture {
 
 impl Inner {
     fn update_inputs(&mut self, cursor: Option<&Cursor>) -> Result<(), RenderError> {
-        self.rtr.update(cursor)?;
-        self.dirty();
+        if self.rtr.update(cursor)? {
+            self.dirty();
+        }
         Ok(())
     }