From 1b1216e53db89f12c63a1a3fc9a47c10b303c64a Mon Sep 17 00:00:00 2001
From: Maciej Suminski <maciej.suminski@cern.ch>
Date: Tue, 14 May 2013 10:41:05 +0200
Subject: [PATCH] Modified SetOffset (VBO_ITEM/OpenGL GAL) function.

---
 common/gal/opengl/vbo_item.cpp | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/common/gal/opengl/vbo_item.cpp b/common/gal/opengl/vbo_item.cpp
index 2ef84ccf5a..4663dada19 100644
--- a/common/gal/opengl/vbo_item.cpp
+++ b/common/gal/opengl/vbo_item.cpp
@@ -142,8 +142,18 @@ int VBO_ITEM::GetSize() const
 
 void VBO_ITEM::SetOffset( int aOffset )
 {
+    if( m_offset == aOffset )
+        return;
+
+    int delta = aOffset - m_offset;
+
+    // Change offset for all the stored indices
+    for( int i = 0; i < m_size; ++i )
+    {
+        m_indices += delta;
+    }
+
     m_offset = aOffset;
-    // TODO change offset for all the vertices?
 }