X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=shaderlib%2Fshadow.glsl;h=d6e2b385f8955009abf737d998fbe7dd984f8996;hb=a01be4f86739fec1ab25d5dc2180c9b0a1a5380c;hp=438af68d45181a86b6ec16f3cef065ba91ab88c4;hpb=b733c793381e78637f52c7f77cc4f69e914918e1;p=libs%2Fgl.git

diff --git a/shaderlib/shadow.glsl b/shaderlib/shadow.glsl
index 438af68d..d6e2b385 100644
--- a/shaderlib/shadow.glsl
+++ b/shaderlib/shadow.glsl
@@ -6,13 +6,13 @@ struct ShadowParameters
 	float darkness;
 	int matrix_index;
 	vec4 region;
-	float bias;
+	vec2 bias;
 };
 
 uniform ShadowMap
 {
 	ShadowParameters shadows[max_lights];
-	mat4 shd_world_matrix[max_lights];
+	mat4 shd_world_matrix[max_lights*4];
 };
 
 uniform sampler2DShadow shadow_map;
@@ -29,7 +29,21 @@ virtual float get_shadow_factor(int index, vec4 world_pos)
 		if(type==1)
 		{
 			shadow_coord = (shd_world_matrix[shadows[index].matrix_index]*world_pos).xyz;
-			shadow_coord.z -= shadows[index].bias;
+			shadow_coord.z -= shadows[index].bias.x;
+		}
+		else if(type==2)
+		{
+			int base = shadows[index].matrix_index;
+			vec4 clip_coord = shd_world_matrix[base]*world_pos;
+			for(int i=1; i<4; ++i)
+			{
+				vec4 c = shd_world_matrix[base+i]*world_pos;
+				if(c.w>clip_coord.w)
+					clip_coord = c;
+			}
+			shadow_coord = clip_coord.xyz/clip_coord.w;
+			vec2 bias = shadows[index].bias;
+			shadow_coord.z = (shadow_coord.z+bias.x)/bias.y-bias.x;
 		}
 		else
 			return 1.0;