X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=shaderlib%2Fshadow.glsl;h=2fa1fd81686c832f3ce78463467500966c092a8e;hb=bace0b24414abc7b3ba46df3a9fd7408d7479a5e;hp=d751b460778af84155e127b828d21c6f4f614d33;hpb=842c817bb679a5a0abc05e8149e2e6e0ae1a0412;p=libs%2Fgl.git

diff --git a/shaderlib/shadow.glsl b/shaderlib/shadow.glsl
index d751b460..2fa1fd81 100644
--- a/shaderlib/shadow.glsl
+++ b/shaderlib/shadow.glsl
@@ -1,20 +1,41 @@
 import msp_interface;
 
-layout(constant_id=auto) const bool use_shadow_map = false;
+struct ShadowParameters
+{
+	int type;
+	float darkness;
+	int matrix_index;
+	vec4 region;
+};
 
-#pragma MSP stage(vertex)
-void shadow_transform(vec4 eye_vertex)
+uniform ShadowMap
 {
-	out vec3 shadow_coord = (shd_eye_matrix*eye_vertex).xyz;
-}
+	ShadowParameters shadows[max_lights];
+	mat4 shd_world_matrix[max_lights];
+};
+
+uniform sampler2DShadow shadow_map;
+
+layout(constant_id=auto) const bool use_shadow_map = false;
 
 #pragma MSP stage(fragment)
-float get_shadow_factor(int index)
+virtual float get_shadow_factor(int index, vec4 world_pos)
 {
 	if(use_shadow_map)
 	{
-		float shadow_sample = texture(shadow_map, shadow_coord);
-		return mix(1.0, shadow_sample, shadow_darkness);
+		int type = shadows[index].type;
+		vec3 shadow_coord;
+		if(type==1)
+			shadow_coord = (shd_world_matrix[shadows[index].matrix_index]*world_pos).xyz;
+		else
+			return 1.0;
+
+		if(shadow_coord.x<0 || shadow_coord.x>1 || shadow_coord.y<0 || shadow_coord.y>1)
+			return 1.0;
+
+		vec4 region = shadows[index].region;
+		float shadow_sample = texture(shadow_map, shadow_coord*vec3(region.zw, 1.0)+vec3(region.xy, 0.0));
+		return mix(1.0, shadow_sample, shadows[index].darkness);
 	}
 	else
 		return 1.0;