From: Mikko Rasa <tdb@tdb.fi>
Date: Fri, 6 Jan 2017 16:15:43 +0000 (+0200)
Subject: Use linear filtering for ambient occlusion render target
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=commitdiff_plain;h=702de88f837584fd046d787f7199e4560ceda9c4

Use linear filtering for ambient occlusion render target

The blurring step samples it exactly between texels so nearest filtering
may cause artifacts due to floating point math instability.
---

diff --git a/source/ambientocclusion.cpp b/source/ambientocclusion.cpp
index af1008b4..5edbf833 100644
--- a/source/ambientocclusion.cpp
+++ b/source/ambientocclusion.cpp
@@ -17,6 +17,7 @@ AmbientOcclusion::AmbientOcclusion(unsigned w, unsigned h, float):
 	combine_shader("ambientocclusion_combine.glsl"),
 	quad(get_fullscreen_quad())
 {
+	occlude_target.set_texture_filter(LINEAR);
 	texturing.attach(2, occlude_target.get_target_texture(RENDER_COLOR));
 
 	unsigned seed = 1;