X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;ds=sidebyside;f=shaderlib%2Flighting.glsl;fp=shaderlib%2Flighting.glsl;h=762eb493fe3396839b0cbb42d5ed9f4c47348554;hb=e196a09d1df1e8504ff037d1701b7159c4f04e84;hp=0000000000000000000000000000000000000000;hpb=7c797f8445ab02381e358472755e94e5c5125252;p=libs%2Fgl.git

diff --git a/shaderlib/lighting.glsl b/shaderlib/lighting.glsl
new file mode 100644
index 00000000..762eb493
--- /dev/null
+++ b/shaderlib/lighting.glsl
@@ -0,0 +1,33 @@
+struct LightSourceParameters
+{
+	vec4 position;
+	vec3 color;
+	int type;
+	vec3 attenuation;
+};
+
+const int max_lights = 6;
+layout(set=0) uniform Lighting
+{
+	LightSourceParameters light_sources[max_lights];
+	vec4 ambient_color;
+	vec4 fog_color;
+	//float fog_start_distance;
+	float fog_density;
+};
+
+#pragma MSP stage(fragment)
+struct IncomingLight
+{
+	vec3 direction;
+	vec3 color;
+};
+
+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);
+}