Don't apply shadows outside the shadowmap's range

[libs/gl.git] / shaderlib / shadow.glsl

diff --git a/shaderlib/shadow.glsl b/shaderlib/shadow.glsl
index d751b460778af84155e127b828d21c6f4f614d33..f0338b95f8a10c1f0a9ced28210d59fb345e5d4d 100644 (file)
--- a/shaderlib/shadow.glsl
+++ b/shaderlib/shadow.glsl
@@ -1,5 +1,13 @@
 import msp_interface;
 
+uniform ShadowMap
+{
+       float shadow_darkness;
+       mat4 shd_eye_matrix;
+};
+
+uniform sampler2DShadow shadow_map;
+
 layout(constant_id=auto) const bool use_shadow_map = false;
 
 #pragma MSP stage(vertex)
@@ -9,10 +17,12 @@ void shadow_transform(vec4 eye_vertex)
 }
 
 #pragma MSP stage(fragment)
-float get_shadow_factor(int index)
+virtual float get_shadow_factor(int index)
 {
        if(use_shadow_map)
        {
+               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);
        }