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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2008 by Sun Microsystems, Inc.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * $RCSfile: lerp.hxx,v $
+ * $Revision: 1.6 $
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org. If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#ifndef _BGFX_TOOLS_LERP_HXX
+#define _BGFX_TOOLS_LERP_HXX
+
+#include <sal/types.h>
+
+namespace basegfx
+{
+ namespace tools
+ {
+ /** Generic linear interpolator
+
+ @tpl ValueType
+ Must have operator+ and operator* defined, and should
+ have value semantics.
+
+ @param t
+ As usual, t must be in the [0,1] range
+ */
+ template< typename ValueType > ValueType lerp( const ValueType& rFrom,
+ const ValueType& rTo,
+ double t )
+ {
+ // This is only to suppress a double->int warning. All other
+ // types should be okay here.
+ return static_cast<ValueType>( (1.0-t)*rFrom + t*rTo );
+ }
+ }
+}
+
+#endif /* _BGFX_TOOLS_LERP_HXX */
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */