From e98fe0a01c5873d988903d2a96315b5606def7c9 Mon Sep 17 00:00:00 2001
From: charlotte <charlotte.c.mcelwain@gmail.com>
Date: Mon, 31 Mar 2025 11:07:20 -0700
Subject: [PATCH] Fix mesh tag feature for 2d. (#18636)

# Objective

Fixes #18564
---
 crates/bevy_sprite/src/mesh2d/mesh2d_functions.wgsl | 4 ++++
 crates/bevy_sprite/src/mesh2d/mesh2d_types.wgsl     | 1 +
 2 files changed, 5 insertions(+)

diff --git a/crates/bevy_sprite/src/mesh2d/mesh2d_functions.wgsl b/crates/bevy_sprite/src/mesh2d/mesh2d_functions.wgsl
index 0b99482211..dbd73fb171 100644
--- a/crates/bevy_sprite/src/mesh2d/mesh2d_functions.wgsl
+++ b/crates/bevy_sprite/src/mesh2d/mesh2d_functions.wgsl
@@ -43,3 +43,7 @@ fn mesh2d_tangent_local_to_world(world_from_local: mat4x4<f32>, vertex_tangent:
         vertex_tangent.w
     );
 }
+
+fn get_tag(instance_index: u32) -> u32 {
+    return mesh[instance_index].tag;
+}
\ No newline at end of file
diff --git a/crates/bevy_sprite/src/mesh2d/mesh2d_types.wgsl b/crates/bevy_sprite/src/mesh2d/mesh2d_types.wgsl
index d5038c818d..e29264e0bf 100644
--- a/crates/bevy_sprite/src/mesh2d/mesh2d_types.wgsl
+++ b/crates/bevy_sprite/src/mesh2d/mesh2d_types.wgsl
@@ -13,4 +13,5 @@ struct Mesh2d {
     local_from_world_transpose_b: f32,
     // 'flags' is a bit field indicating various options. u32 is 32 bits so we have up to 32 options.
     flags: u32,
+    tag: u32,
 };