X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=shaderlib%2Fphong.glsl;h=234897116183a4997c625687447b65172ef8036d;hb=8d211effd0c6db66e57f9ffd8ee712eef6069a1c;hp=56fa68c7767e1264d2a170baa4931e69ae8c0482;hpb=842c817bb679a5a0abc05e8149e2e6e0ae1a0412;p=libs%2Fgl.git

diff --git a/shaderlib/phong.glsl b/shaderlib/phong.glsl
index 56fa68c7..23489711 100644
--- a/shaderlib/phong.glsl
+++ b/shaderlib/phong.glsl
@@ -2,6 +2,27 @@ import msp_interface;
 import common;
 import shadow;
 
+struct BasicMaterialParameters
+{
+	vec4 diffuse;
+	vec4 specular;
+	vec4 emission;
+	float shininess;
+	float reflectivity;
+};
+
+uniform BasicMaterial
+{
+	BasicMaterialParameters basic_material;
+	float alpha_cutoff;
+};
+
+uniform sampler2D diffuse_map;
+uniform sampler2D specular_map;
+uniform sampler2D shininess_map;
+uniform sampler2D emission_map;
+uniform sampler2D reflectivity_map;
+
 layout(constant_id=auto) const bool use_diffuse_map = false;
 layout(constant_id=auto) const bool use_specular = false;
 layout(constant_id=auto) const bool use_specular_map = false;
@@ -10,11 +31,10 @@ 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_sky = false;
-layout(constant_id=auto) const bool use_fog = false;
+layout(constant_id=auto) const bool use_alpha_cutoff = false;
 
 #pragma MSP stage(fragment)
-vec4 get_diffuse_color()
+virtual vec4 get_diffuse_color()
 {
 	if(use_diffuse_map)
 		return texture(diffuse_map, texcoord.xy);
@@ -22,7 +42,7 @@ vec4 get_diffuse_color()
 		return basic_material.diffuse;
 }
 
-vec3 get_specular_color()
+virtual vec3 get_specular_color()
 {
 	if(use_specular_map)
 		return texture(specular_map, texcoord.xy).rgb;
@@ -30,7 +50,7 @@ vec3 get_specular_color()
 		return basic_material.specular.rgb;
 }
 
-float get_shininess_value()
+virtual float get_shininess_value()
 {
 	if(use_shininess_map)
 		return texture(shininess_map, texcoord.xy).r*255.0;
@@ -38,7 +58,7 @@ float get_shininess_value()
 		return basic_material.shininess;
 }
 
-vec3 get_emission_color()
+virtual vec3 get_emission_color()
 {
 	if(use_emission_map)
 		return texture(emission_map, texcoord.xy).rgb;
@@ -46,7 +66,7 @@ vec3 get_emission_color()
 		return basic_material.emission.rgb;
 }
 
-float get_reflectivity_value()
+virtual float get_reflectivity_value()
 {
 	if(use_reflectivity_map)
 		return texture(reflectivity_map, texcoord.xy).r;
@@ -59,32 +79,29 @@ vec3 phong_ambient(vec3 surface_diffuse)
 	return ambient_color.rgb*surface_diffuse;
 }
 
-vec3 phong_one_light(vec3 light, vec3 normal, vec3 look, vec3 light_color, vec3 surface_diffuse, vec3 surface_specular, float shininess)
+vec3 phong_one_light(vec3 light, vec3 normal, vec3 look, vec3 surface_diffuse, vec3 surface_specular, float shininess)
 {
 	float diffuse_intensity = max(dot(light, normal), 0.0);
-	vec3 color = light_color*surface_diffuse*diffuse_intensity;
+	vec3 color = surface_diffuse*diffuse_intensity;
 	if(use_specular)
 	{
-		/* The light vector points towards the light, so reflected will point
-		towards the surface - but so does the look vector. */
-		vec3 reflected = reflect(light, normal);
-		float specular_intensity = pow(max(dot(reflected, look), 0.0), shininess);
-		color += light_color*surface_specular*specular_intensity;
+		vec3 reflected = reflect(look, normal);
+		float specular_intensity = pow(max(dot(reflected, light), 0.0), shininess);
+		color += surface_specular*specular_intensity;
 	}
 	return color;
 }
 
 vec3 phong_lighting(vec3 normal, vec3 look, vec3 surface_diffuse, vec3 surface_specular, float shininess)
 {
-	vec3 light;
-	if(use_normal_map)
-		light = normalize(tbn_light_dir);
-	else
-		light = normalize(eye_light_dir);
-
 	vec3 color = phong_ambient(surface_diffuse);
-	float shadow = get_shadow_factor(0);
-	color += phong_one_light(light, normal, look, light_sources[0].diffuse.rgb, surface_diffuse, surface_specular, shininess)*shadow;
+	for(int i=0; i<max_lights; ++i)
+		if(light_sources[i].type!=0)
+		{
+			IncomingLight incoming = get_incoming_light(i, world_vertex.xyz);
+			float shadow = get_shadow_factor(i, world_vertex);
+			color += phong_one_light(incoming.direction, normal, look, surface_diffuse, surface_specular, shininess)*incoming.color*shadow;
+		}
 
 	if(use_emission)
 		color += get_emission_color();
@@ -97,20 +114,13 @@ vec3 phong_lighting(vec3 normal, vec3 look, vec3 surface_diffuse, vec3 surface_s
 
 void main()
 {
-	vec3 normal;
-	vec3 look;
-	if(use_normal_map)
-	{
-		normal = get_fragment_normal();
-		look = normalize(tbn_look_dir);
-	}
-	else
-	{
-		normal = normalize(eye_normal);
-		look = normalize(eye_look_dir);
-	}
-
 	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);
+
 	vec3 surface_specular = get_specular_color();
 	float shininess = get_shininess_value();