51 lines
1.8 KiB
C++
51 lines
1.8 KiB
C++
/* -*- 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_TOOLS_LERP_HXX
|
|
#define INCLUDED_BASEGFX_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 // INCLUDED_BASEGFX_TOOLS_LERP_HXX
|
|
|
|
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|