X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=shaderlib%2Fshadow.glsl;h=d533b4ec389913cef931cd7cce4021f5c253ef3d;hb=HEAD;hp=6f4acd2786a6319c242d9ff8300a00ecc535d0a7;hpb=6dcf74922f46b086ad394c19fd6ce083a635b290;p=libs%2Fgl.git

diff --git a/shaderlib/shadow.glsl b/shaderlib/shadow.glsl
index 6f4acd27..d533b4ec 100644
--- a/shaderlib/shadow.glsl
+++ b/shaderlib/shadow.glsl
@@ -1,20 +1,59 @@
-import msp_interface;
+import lighting;
 
-layout(constant_id=auto) const bool use_shadow_map = false;
+struct ShadowParameters
+{
+	int type;
+	float darkness;
+	int matrix_index;
+	vec4 region;
+	vec2 bias;
+};
 
-#pragma MSP stage(vertex)
-void shadow_transform(vec4 eye_vertex)
+layout(set=0) uniform ShadowMap
 {
-	out vec3 shadow_coord = (shd_eye_matrix*eye_vertex).xyz;
-}
+	ShadowParameters shadows[max_lights];
+	mat4 shd_world_matrix[max_lights*4];
+};
+
+layout(set=0) uniform sampler2DShadow shadow_map;
+
+layout(constant_id=auto) const bool use_shadow_map = false;
 
 #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)
 	{
-		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;
+			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;
+
+		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, vec3(shadow_coord.xy*region.zw+region.xy, min(shadow_coord.z, 1.0)));
+		return mix(1.0, shadow_sample, shadows[index].darkness);
 	}
 	else
 		return 1.0;