From: Mikko Rasa <tdb@tdb.fi>
Date: Tue, 14 Dec 2021 14:23:34 +0000 (+0200)
Subject: Clamp depth reference for shadows to 1.0
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=commitdiff_plain;h=5e611353c5fcaf9219bd3037a32bce0f91313264

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 d6e2b385..2e8a05b0 100644
--- 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