X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=shaderlib%2Fcommon.glsl;h=249cae7c67e9c65c64d6dd4ab8a9829dd0ed8ef8;hb=HEAD;hp=6bac9c3720e478fe3beb5a186da3b53800e902f2;hpb=f1e296bb2442dfbea12e7b38a97cc152aa34569c;p=libs%2Fgl.git

diff --git a/shaderlib/common.glsl b/shaderlib/common.glsl
index 6bac9c37..249cae7c 100644
--- a/shaderlib/common.glsl
+++ b/shaderlib/common.glsl
@@ -1,17 +1,17 @@
 import msp_interface;
 import shadow;
 
-layout(set=0) uniform EnvMap
+struct AlphaCutoffParams
 {
-	mat3 env_world_matrix;
+	float cutoff;
+	float feather;
 };
 
 layout(set=1) uniform sampler2D normal_map;
-layout(set=0) uniform samplerCube environment_map;
-layout(set=0) uniform samplerCube irradiance_map;
 
 layout(constant_id=auto) const bool use_instancing = false;
 layout(constant_id=auto) const bool use_normal_map = false;
+layout(constant_id=auto) const bool use_alpha_cutoff = false;
 
 #pragma MSP stage(vertex)
 virtual vec4 get_vertex_position()
@@ -75,12 +75,6 @@ void main()
 }
 
 #pragma MSP stage(fragment)
-struct IncomingLight
-{
-	vec3 direction;
-	vec3 color;
-};
-
 layout(location=0) out vec4 frag_color;
 
 virtual vec3 get_fragment_normal()
@@ -93,30 +87,17 @@ virtual vec3 get_fragment_normal()
 		return sgn*normalize(world_normal);
 }
 
-virtual IncomingLight get_incoming_light(int index, vec3 world_pos)
-{
-	vec4 light_pos = light_sources[index].position;
-	vec3 rel_pos = light_pos.xyz-world_pos*light_pos.w;
-	float d = length(rel_pos);
-	float attenuation = 1.0/dot(vec3(1.0, d, d*d), light_sources[index].attenuation);
-	return IncomingLight(rel_pos/d, light_sources[index].color*attenuation);
-}
-
-virtual vec3 get_environment_sample(vec3 direction, float roughness)
+float apply_alpha_cutoff(float alpha, AlphaCutoffParams params)
 {
-	float lod = (2-roughness)*roughness*(textureQueryLevels(environment_map)-1);
-	return textureLod(environment_map, env_world_matrix*direction, lod).rgb;
-}
-
-virtual vec3 get_reflection(vec3 normal, vec3 look)
-{
-	vec3 reflect_dir = reflect(look, normal);
-	return get_environment_sample(reflect_dir, 0.0);
-}
-
-virtual vec3 get_irradiance_sample(vec3 normal)
-{
-	return texture(irradiance_map, env_world_matrix*normal).rgb;
+	if(use_alpha_cutoff)
+	{
+		if(alpha<params.cutoff)
+			discard;
+		float limit = min(params.cutoff+params.feather*fwidth(alpha), 1.0);
+		return smoothstep(params.cutoff, limit, alpha);
+	}
+	else
+		return alpha;
 }
 
 vec3 apply_fog(vec3 color)