X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=shaderlib%2Fshadow.glsl;h=52cd7c13ab767a4cb07b24e11b4be7bb1c898df4;hb=ab23d3910ac081066b42c184c6229aaa397dd46c;hp=04cf6832dcffd19a6a4949c1049b98e0f2b64a40;hpb=82282de52e8e8f3bbafefaf92bf76f53f2c2495e;p=libs%2Fgl.git

diff --git a/shaderlib/shadow.glsl b/shaderlib/shadow.glsl
index 04cf6832..52cd7c13 100644
--- a/shaderlib/shadow.glsl
+++ b/shaderlib/shadow.glsl
@@ -1,30 +1,37 @@
 import msp_interface;
 
-uniform ShadowMap
+struct ShadowParameters
 {
-	float shadow_darkness;
+	int enabled;
+	float darkness;
 	mat4 shd_world_matrix;
+	vec4 region;
+};
+
+uniform ShadowMap
+{
+	ShadowParameters shadows[max_lights];
 };
 
 uniform sampler2DShadow shadow_map;
 
 layout(constant_id=auto) const bool use_shadow_map = false;
 
-#pragma MSP stage(vertex)
-void shadow_transform(vec4 world_vertex)
-{
-	out vec3 shadow_coord = (shd_world_matrix*world_vertex).xyz;
-}
-
 #pragma MSP stage(fragment)
-virtual float get_shadow_factor(int index)
+virtual float get_shadow_factor(int index, vec4 world_pos)
 {
 	if(use_shadow_map)
 	{
+		if(shadows[index].enabled==0)
+			return 1.0;
+
+		vec3 shadow_coord = (shadows[index].shd_world_matrix*world_pos).xyz;
 		if(shadow_coord.x<0 || shadow_coord.x>1 || shadow_coord.y<0 || shadow_coord.y>1)
 			return 1.0;
-		float shadow_sample = texture(shadow_map, shadow_coord);
-		return mix(1.0, shadow_sample, shadow_darkness);
+
+		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;