X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=shaderlib%2Fcommon.glsl;h=9e794f1d2c17eca99c48f847bf0d91ba96235ac1;hb=fb5f83c2e3f8f8a6a6444a33bec15e9477a487d1;hp=5c10d06fbcac31a5fd9c06f5e37293ea406c2203;hpb=842c817bb679a5a0abc05e8149e2e6e0ae1a0412;p=libs%2Fgl.git

diff --git a/shaderlib/common.glsl b/shaderlib/common.glsl
index 5c10d06f..9e794f1d 100644
--- a/shaderlib/common.glsl
+++ b/shaderlib/common.glsl
@@ -4,22 +4,22 @@ import shadow;
 layout(constant_id=auto) const bool use_normal_map = false;
 
 #pragma MSP stage(vertex)
-vec4 get_vertex_position()
+virtual vec4 get_vertex_position()
 {
 	return vertex;
 }
 
-vec3 get_vertex_normal()
+virtual vec3 get_vertex_normal()
 {
 	return normal;
 }
 
-vec4 transform_position(vec4 pos)
+virtual vec4 transform_position(vec4 pos)
 {
 	return eye_obj_matrix*pos;
 }
 
-vec3 transform_normal(vec3 nor)
+virtual vec3 transform_normal(vec3 nor)
 {
 	return eye_obj_normal_matrix*nor;
 }
@@ -44,7 +44,6 @@ void standard_transform()
 	out vec3 tbn_halfway_dir = eye_halfway_dir*eye_tbn_matrix;
 
 	out vec3 tbn_zenith_dir = eye_zenith_dir*eye_tbn_matrix;
-	out vec3 shadow_coord = (shd_eye_matrix*eye_vertex).xyz;
 	out float fog_coord = eye_vertex.z;
 
 	for(int i=0; i<max_clip_planes; ++i)
@@ -53,7 +52,7 @@ void standard_transform()
 	shadow_transform(eye_vertex);
 }
 
-void custom_transform()
+virtual void custom_transform()
 {
 }
 
@@ -65,7 +64,7 @@ void main()
 }
 
 #pragma MSP stage(fragment)
-vec3 get_fragment_normal()
+virtual vec3 get_fragment_normal()
 {
 	if(use_normal_map)
 		return normalize(texture(normal_map, texcoord.xy).xyz*2.0-1.0);
@@ -73,12 +72,12 @@ vec3 get_fragment_normal()
 		return vec3(0.0, 0.0, 1.0);
 }
 
-vec4 get_environment_sample(vec3 direction)
+virtual vec4 get_environment_sample(vec3 direction)
 {
 	return texture(environment_map, direction);
 }
 
-vec3 get_reflection(vec3 normal, vec3 look)
+virtual vec3 get_reflection(vec3 normal, vec3 look)
 {
 	vec3 reflect_dir = reflect(look, normal);
 	if(use_normal_map)
@@ -90,5 +89,5 @@ vec3 get_reflection(vec3 normal, vec3 look)
 vec3 apply_fog(vec3 color)
 {
 	float fog_value = exp(fog_coord*fog_density);
-	return mix(fog_color, color, fog_value);
+	return mix(fog_color.rgb, color, fog_value);
 }