From: Mikko Rasa <tdb@tdb.fi>
Date: Mon, 14 Dec 2015 19:45:51 +0000 (+0200)
Subject: Fix a small error in calculating projection frustum vertices
X-Git-Url: http://git.tdb.fi/?p=geometrycompositor.git;a=commitdiff_plain;h=3ef1d1967a6391f91117ebdcd828423cc8fdb946

Fix a small error in calculating projection frustum vertices
---

diff --git a/source/main.c b/source/main.c
index a14ea8d..cde4df3 100644
--- a/source/main.c
+++ b/source/main.c
@@ -653,8 +653,8 @@ void update_monitor_vertices(CompositedScreen *screen, CompositedMonitor *monito
 		{
 			i = 1+(1+y*2+x)*3;
 			monitor->geometry_data[i] = ((x-0.5f)*distance/monitor->perspective)*10000;
-			monitor->geometry_data[i+1] = (eye[1]+look[1]*distance-(y-0.5f)*look[2]*distance/monitor->perspective/aspect)*10000;
-			monitor->geometry_data[i+2] = (eye[2]+look[2]*distance+(y-0.5f)*look[1]*distance/monitor->perspective/aspect)*10000;
+			monitor->geometry_data[i+1] = (eye[1]+look[1]*distance-(y-monitor->vertical_center)*look[2]*distance/monitor->perspective/aspect)*10000;
+			monitor->geometry_data[i+2] = (eye[2]+look[2]*distance+(y-monitor->vertical_center)*look[1]*distance/monitor->perspective/aspect)*10000;
 		}
 	for(i=0; i<(t+1)*(t+1)*3; ++i)
 		monitor->geometry_data[16+i] = vertex_data[i]*10000;