[Bf-blender-cvs] SVN commit: /data/svn/bf-blender [59671] trunk/blender/intern/cycles/render /nodes.cpp: Fix for [#36610] The new sky model produces strange results

[Thomas Dinges]

Revision: 59671
          http://projects.blender.org/scm/viewvc.php?view=rev&root=bf-blender&revision=59671
Author:   dingto
Date:     2013-08-30 18:04:23 +0000 (Fri, 30 Aug 2013)
Log Message:
-----------
Fix for [#36610] The new sky model produces strange results
* Clamp theta sky coordinates, to prevent a negative solarElevation. 

Note: This means that you cannot get absolute night with the new model, but this is not supported anyway. So when you reach the maximum sunset, use the World Strength to further decrease the light. 

Modified Paths:
--------------
    trunk/blender/intern/cycles/render/nodes.cpp

Modified: trunk/blender/intern/cycles/render/nodes.cpp
===================================================================
--- trunk/blender/intern/cycles/render/nodes.cpp	2013-08-30 17:34:27 UTC (rev 59670)
+++ trunk/blender/intern/cycles/render/nodes.cpp	2013-08-30 18:04:23 UTC (rev 59671)
@@ -464,6 +464,9 @@
 	float2 spherical = sky_spherical_coordinates(dir);
 	float theta = spherical.x;
 	float phi = spherical.y;
+	
+	/* Clamp to Horizon */
+	theta = clamp(theta, 0.0f, M_PI_2_F); 
 
 	sunsky->theta = theta;
 	sunsky->phi = phi;