From ed5d922fd58c5cb1fc7502c93983d37fc871ddf5 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Thu, 4 Jul 2019 00:06:00 +0300
Subject: [PATCH] Guard against sample points behind the camera in ambient
 occlusion

---
 shaderlib/ambientocclusion.glsl | 2 ++
 1 file changed, 2 insertions(+)

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;
 }
-- 
2.45.2