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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_BASEGFX_UTILS_LERP_HXX
#define INCLUDED_BASEGFX_UTILS_LERP_HXX
namespace basegfx
{
namespace utils
{
/** 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 // INCLUDED_BASEGFX_UTILS_LERP_HXX
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