X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fwindingtest.cpp;h=acbc20fc5ba127688c89c95caa0d5207a7c66f24;hb=e7556941c41b1a0fc84fe7986c98ee79eccbf564;hp=b54f71217f5b8387c054dec03eaea18380cd576c;hpb=635d00bc1a9ba43ef1224681a14d0710a098cf87;p=libs%2Fgl.git

diff --git a/source/windingtest.cpp b/source/windingtest.cpp
index b54f7121..acbc20fc 100644
--- a/source/windingtest.cpp
+++ b/source/windingtest.cpp
@@ -1,10 +1,4 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2011  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
+#include <msp/strings/format.h>
 #include "windingtest.h"
 
 namespace Msp {
@@ -17,7 +11,7 @@ void operator>>(const LexicalConverter &conv, FaceWinding &winding)
 	else if(conv.get()=="COUNTERCLOCKWISE")
 		winding = COUNTERCLOCKWISE;
 	else
-		throw InvalidParameterValue("Invalid FaceWinding");
+		throw lexical_error(format("conversion of '%s' to FaceWinding", conv.get()));
 }
 
 WindingTest::WindingTest():
@@ -50,13 +44,23 @@ void WindingTest::unbind()
 		glDisable(GL_CULL_FACE);
 }
 
-WindingTest &WindingTest::clockwise()
+const WindingTest &WindingTest::get_reverse() const
+{
+	if(!test)
+		return *this;
+	else if(winding==CLOCKWISE)
+		return counterclockwise();
+	else
+		return clockwise();
+}
+
+const WindingTest &WindingTest::clockwise()
 {
 	static WindingTest test(CLOCKWISE);
 	return test;
 }
 
-WindingTest &WindingTest::counterclockwise()
+const WindingTest &WindingTest::counterclockwise()
 {
 	static WindingTest test(COUNTERCLOCKWISE);
 	return test;