From: Mikko Rasa <tdb@tdb.fi>
Date: Wed, 3 Jul 2019 21:06:00 +0000 (+0300)
Subject: Guard against sample points behind the camera in ambient occlusion
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=ed5d922fd58c5cb1fc7502c93983d37fc871ddf5;p=libs%2Fgl.git

Guard against sample points behind the camera in ambient occlusion
---

diff --git a/shaderlib/ambientocclusion.glsl b/shaderlib/ambientocclusion.glsl
index a9873b1d..89d13357 100644
--- a/shaderlib/ambientocclusion.glsl
+++ b/shaderlib/ambientocclusion.glsl
@@ -18,6 +18,8 @@ uniform AmbientOcclusionParams
 #pragma MSP stage(fragment)
 vec3 project(vec3 position)
 {
+	if(position.z>=0.0)
+		return vec3(0.0, 0.0, -1.0);
 	vec4 pp = projection_matrix*vec4(position, 1.0);
 	return pp.xyz/pp.w;
 }