X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fprimitivebuilder.cpp;h=61bde9b96f8862881deb00e0719564dae1b08549;hb=df6f8f1f26b1f230dcb1d626d278c43fd48d468d;hp=42e9d39cbb71c5bf1f56eaf53975bdd140fd607d;hpb=524515ae47ea553e8e1b9381c2027208f2d096db;p=libs%2Fgl.git

diff --git a/source/primitivebuilder.cpp b/source/primitivebuilder.cpp
index 42e9d39c..61bde9b9 100644
--- a/source/primitivebuilder.cpp
+++ b/source/primitivebuilder.cpp
@@ -1,7 +1,7 @@
 /* $Id$
 
 This file is part of libmspgl
-Copyright © 2008, 2010  Mikko Rasa, Mikkosoft Productions
+Copyright © 2008, 2010-2011  Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
 
@@ -13,7 +13,8 @@ namespace GL {
 PrimitiveBuilder::PrimitiveBuilder(VertexArray &a):
 	array(a),
 	vab(array),
-	in_batch(false)
+	in_batch(false),
+	offs(0)
 { }
 
 void PrimitiveBuilder::begin(PrimitiveType t)
@@ -37,13 +38,20 @@ void PrimitiveBuilder::end()
 	end_();
 }
 
+void PrimitiveBuilder::offset(unsigned o)
+{
+	if(o>array.size())
+		throw InvalidParameterValue("Element offset out of range");
+	offs = o;
+}
+
 void PrimitiveBuilder::element(unsigned i)
 {
 	if(!in_batch)
 		throw InvalidState("Element specification not between begin() and end()");
-	if(i>=array.size())
+	if(offs+i>=array.size())
 		throw InvalidParameterValue("Element index out of range");
-	element_(i);
+	element_(offs+i);
 }
 
 PrimitiveType PrimitiveBuilder::get_type() const