X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=shaderlib%2Fphong.glsl;h=234897116183a4997c625687447b65172ef8036d;hb=9d00429567a54023228edfa340cd2a4d1e877d1e;hp=080c904895668f1e985a893ef959fb467ee0a91d;hpb=f853ca0a365ae8b43ba8b2f4d6f21cd1c2bd4bd5;p=libs%2Fgl.git

diff --git a/shaderlib/phong.glsl b/shaderlib/phong.glsl
index 080c9048..23489711 100644
--- a/shaderlib/phong.glsl
+++ b/shaderlib/phong.glsl
@@ -14,6 +14,7 @@ struct BasicMaterialParameters
 uniform BasicMaterial
 {
 	BasicMaterialParameters basic_material;
+	float alpha_cutoff;
 };
 
 uniform sampler2D diffuse_map;
@@ -30,6 +31,7 @@ layout(constant_id=auto) const bool use_emission = false;
 layout(constant_id=auto) const bool use_emission_map = false;
 layout(constant_id=auto) const bool use_reflectivity = false;
 layout(constant_id=auto) const bool use_reflectivity_map = false;
+layout(constant_id=auto) const bool use_alpha_cutoff = false;
 
 #pragma MSP stage(fragment)
 virtual vec4 get_diffuse_color()
@@ -112,10 +114,13 @@ vec3 phong_lighting(vec3 normal, vec3 look, vec3 surface_diffuse, vec3 surface_s
 
 void main()
 {
+	vec4 surface_diffuse = get_diffuse_color();
+	if(use_alpha_cutoff && surface_diffuse.a<alpha_cutoff)
+		discard;
+
 	vec3 normal = get_fragment_normal();
 	vec3 look = normalize(world_look_dir);
 
-	vec4 surface_diffuse = get_diffuse_color();
 	vec3 surface_specular = get_specular_color();
 	float shininess = get_shininess_value();