From 5f365181813c34505782a0efac62c940bf3814aa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miloslav=20=C4=8C=C3=AD=C5=BE?= <tastyfish@seznam.cz>
Date: Wed, 8 Nov 2017 09:15:45 +0100
Subject: [PATCH] spherical mapping

---
 apps/openmw/mwrender/renderingmanager.cpp | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/apps/openmw/mwrender/renderingmanager.cpp b/apps/openmw/mwrender/renderingmanager.cpp
index f22a0778d6..73b761ff24 100644
--- a/apps/openmw/mwrender/renderingmanager.cpp
+++ b/apps/openmw/mwrender/renderingmanager.cpp
@@ -644,7 +644,7 @@ namespace MWRender
 
             for (int j = 0; j < h; ++j)
                 for (int i = 0; i < w; ++i)
-                    dest->setColor(getColorByDirection(cylindricalCoords(i / ((float) w), j / ((float) h))),i,j);
+                    dest->setColor(getColorByDirection(sphericalCoords(i / ((float) w), j / ((float) h))),i,j);
         }
 
         osg::Vec3d cylindricalCoords(double x, double y)
@@ -654,6 +654,17 @@ namespace MWRender
             return result;
         }
 
+        osg::Vec3d sphericalCoords(double x, double y)
+        {
+            x = x * 2 * osg::PI;
+            y = (y - 0.5) * osg::PI;
+
+            osg::Vec3 result = osg::Vec3(0.0,cos(y),sin(y));
+            result = osg::Vec3(cos(x) * result.y(),sin(x) * result.y(),result.z());
+
+            return result;
+        }
+
         osg::Vec4 getColorByDirection(osg::Vec3d d)
         {
             double x, y;