/* -*- 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 .

 */

#pragma once

namespace basegfx::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 );

    }

}

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