From 2b54d627c0662ce0a1a0ba91386e95c8f02f54e5 Mon Sep 17 00:00:00 2001
From: Andrzej Kapolka <drzej.k@gmail.com>
Date: Tue, 27 May 2014 14:25:27 -0700
Subject: [PATCH] Try rounding to nearest texel unit to reduce shimmer.

---
 interface/src/Application.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/interface/src/Application.cpp b/interface/src/Application.cpp
index 5b43159122..32fa50e710 100644
--- a/interface/src/Application.cpp
+++ b/interface/src/Application.cpp
@@ -2291,6 +2291,11 @@ void Application::updateShadowMap() {
         radius = qMax(radius, glm::distance(points[i], center));
     }
     center = inverseRotation * center;
+    
+    // to reduce texture "shimmer," move in texel increments
+    float texelSize = (2.0f * radius) / fbo->width();
+    center = glm::round(center / texelSize) * texelSize;
+    
     glm::vec3 minima(center.x - radius, center.y - radius, center.z - radius);
     glm::vec3 maxima(center.x + radius, center.y + radius, center.z + radius);