fix(lines): fix the lines material shader

Signed-off-by: Schmarni <marnistromer@gmail.com>

src/nodes/drawable/line.wgsl

@@ -27,19 +27,12 @@ fn fragment(
     in: VertexOutput,
     @builtin(front_facing) is_front: bool,
 ) -> FragmentOutput {
-#ifdef VERTEX_COLORS
-    var out: FragmentOutput;
-    // apply lighting
-    out.color = in.color;
-    return out;
-#endif
-
     // generate a PbrInput struct from the StandardMaterial bindings
     var pbr_input = pbr_input_from_standard_material(in, is_front);
 
 #ifdef VERTEX_COLORS
     // Multiply emissive color by vertex color
-    pbr_input.material.emissive.rgb *= in.color.rgb;
+    pbr_input.material.emissive *= vec4(in.color.rgb, 1.0);
 #endif
 
     // alpha discard

src/nodes/drawable/lines.rs

@@ -56,7 +56,6 @@ impl MaterialExtension for LineExtension {
 pub struct LinesNodePlugin;
 impl Plugin for LinesNodePlugin {
 	fn build(&self, app: &mut App) {
-		app.add_systems(Startup, test_cube);
 		app.add_systems(Update, build_line_mesh);
 		app.world_mut().resource_mut::<Assets<Shader>>().insert(
 			LINE_SHADER_HANDLE.id(),
@@ -73,28 +72,6 @@ impl Plugin for LinesNodePlugin {
 	}
 }
 
-fn test_cube(
-	mut cmds: Commands,
-	mut meshes: ResMut<Assets<Mesh>>,
-	mut materials: ResMut<Assets<LineMaterial>>,
-) {
-	cmds.spawn((
-		Transform::from_xyz(0.0, 0.5, 0.0),
-		Mesh3d(meshes.add(Cuboid::default())),
-		MeshMaterial3d(materials.add(ExtendedMaterial {
-			base: BevyMaterial {
-				base_color: Color::WHITE,
-				perceptual_roughness: 1.0,
-				// TODO: this should be Blend
-				alpha_mode: AlphaMode::Opaque,
-				// emissive: Color::srgba_u8(128, 128, 128, 255).into(),
-				..default()
-			},
-			extension: LineExtension { unused: 0 },
-		})),
-	));
-}
-
 fn build_line_mesh(
 	mut cmds: Commands,
 	mut meshes: ResMut<Assets<Mesh>>,
@@ -259,7 +236,7 @@ fn build_line_mesh(
 							perceptual_roughness: 1.0,
 							// TODO: this should be Blend
 							alpha_mode: AlphaMode::Opaque,
-							// emissive: Color::srgba_u8(128, 128, 128, 255).into(),
+							emissive: Color::srgba_u8(128/4, 128/4, 128/4, 255).into(),
 							..default()
 						},
 						extension: LineExtension { unused: 0 },