[macOS] support OpenGL < 4.2 in PBS shader

- OpenGL < 4.2 does not support swizzling built in types (e.g. float). - Update the definition of @piece( maxR1F0 ) to work in OpenGL 4.1 Signed-off-by: Rhys Mainwaring <[email protected]>
gazebosim · Aug 11, 2021 · c4279af · c4279af
1 parent 44a1948
commit c4279af
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/ogre2/src/media/Hlms/Pbs/GLSL/BRDFs_piece_ps.glsl b/ogre2/src/media/Hlms/Pbs/GLSL/BRDFs_piece_ps.glsl
@@ -12,7 +12,7 @@
 @property( !fresnel_scalar )
 	@piece( maxR1F0 )max( 1.0 - ROUGHNESS, @insertpiece( F0 ).x )@end
 @end @property( fresnel_scalar )
-	@piece( maxR1F0 )max( (1.0 - ROUGHNESS).xxx, @insertpiece( F0 ).xyz )@end
+	@piece( maxR1F0 )max( (1.0 - vec3(ROUGHNESS, 0.0, 0.0)).xxx, @insertpiece( F0 ).xyz )@end
 @end
 
 //For mortals: