X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=shaderlib%2Fcommon.glsl;h=695bce3b5da4ca0d8b06c5785a8bcea6f2c1da3a;hb=4595453156db0c47926946b0ea1732b1e37e70ce;hp=7a57b0671eebf1a3b4850cb451785c66a52498ff;hpb=139924448ef4753b3942da07091a2630a037c034;p=libs%2Fgl.git

diff --git a/shaderlib/common.glsl b/shaderlib/common.glsl
index 7a57b067..695bce3b 100644
--- a/shaderlib/common.glsl
+++ b/shaderlib/common.glsl
@@ -1,16 +1,17 @@
 import msp_interface;
 import shadow;
 
-uniform EnvMap
+struct AlphaCutoffParams
 {
-	mat3 env_world_matrix;
+	float cutoff;
+	float feather;
 };
 
-uniform sampler2D normal_map;
-uniform samplerCube environment_map;
-uniform samplerCube irradiance_map;
+layout(set=1) uniform sampler2D normal_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()
@@ -25,12 +26,18 @@ virtual vec3 get_vertex_normal()
 
 virtual mat4 get_vertex_transform()
 {
-	return world_obj_matrix;
+	if(use_instancing)
+		return transpose(mat4(instance_transform[0], instance_transform[1], instance_transform[2], vec4(0.0, 0.0, 0.0, 1.0)));
+	else
+		return world_obj_matrix;
 }
 
 virtual mat3 get_normal_transform()
 {
-	return world_obj_normal_matrix;
+	if(use_instancing)
+		return transpose(mat3(instance_transform[0].xyz, instance_transform[1].xyz, instance_transform[2].xyz));
+	else
+		return world_obj_normal_matrix;
 }
 
 void standard_transform()
@@ -78,10 +85,12 @@ layout(location=0) out vec4 frag_color;
 
 virtual vec3 get_fragment_normal()
 {
+	vec3 normal;
+	float sgn = (gl_FrontFacing ? 1.0 : -1.0);
 	if(use_normal_map)
-		return normalize(world_tbn_matrix*(texture(normal_map, texcoord.xy).xyz*2.0-1.0));
+		return sgn*normalize(world_tbn_matrix*(texture(normal_map, texcoord.xy).xyz*2.0-1.0));
 	else
-		return normalize(world_normal);
+		return sgn*normalize(world_normal);
 }
 
 virtual IncomingLight get_incoming_light(int index, vec3 world_pos)
@@ -93,21 +102,17 @@ virtual IncomingLight get_incoming_light(int index, vec3 world_pos)
 	return IncomingLight(rel_pos/d, light_sources[index].color*attenuation);
 }
 
-virtual vec3 get_environment_sample(vec3 direction, float roughness)
-{
-	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)
+float apply_alpha_cutoff(float alpha, AlphaCutoffParams params)
 {
-	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)