From 9086e60c20ef8f400f09802e801487ce06bb44ee Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fran=C3=A7ois?= <mockersf@gmail.com>
Date: Wed, 4 Oct 2023 20:29:29 +0200
Subject: [PATCH] wireframes: workaround for DX12 (#10022)

# Objective

- Fixes #10019

## Solution

- Uses a workaround for DX12
---
 crates/bevy_pbr/src/render/wireframe.wgsl | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/crates/bevy_pbr/src/render/wireframe.wgsl b/crates/bevy_pbr/src/render/wireframe.wgsl
index 453ee5f8c1..630e86c2f2 100644
--- a/crates/bevy_pbr/src/render/wireframe.wgsl
+++ b/crates/bevy_pbr/src/render/wireframe.wgsl
@@ -50,7 +50,9 @@ fn vertex(vertex_no_morph: Vertex) -> VertexOutput {
 #ifdef SKINNED
     let model = bevy_pbr::skinning::skin_model(vertex.joint_indexes, vertex.joint_weights);
 #else
-    let model = get_model_matrix(vertex.instance_index);
+    // Use vertex_no_morph.instance_index instead of vertex.instance_index to work around a wgpu dx12 bug.
+    // See https://github.com/gfx-rs/naga/issues/2416 .
+    let model = get_model_matrix(vertex_no_morph.instance_index);
 #endif
 
     var out: VertexOutput;