Clamp depth reference for shadows to 1.0

This makes objects which are "behind" the shadow map volume sample the
shadow map correctly and not treat the clear value as a shadow caster.

diff --git a/shaderlib/shadow.glsl b/shaderlib/shadow.glsl
index d6e2b385f8955009abf737d998fbe7dd984f8996..2e8a05b0889ab77464cc45e4324cc1e231c222d0 100644 (file)
--- a/shaderlib/shadow.glsl
+++ b/shaderlib/shadow.glsl
@@ -52,7 +52,7 @@ virtual float get_shadow_factor(int index, vec4 world_pos)
                        return 1.0;
 
                vec4 region = shadows[index].region;
-               float shadow_sample = texture(shadow_map, vec3(shadow_coord.xy*region.zw+region.xy, shadow_coord.z));
+               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