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71 lines
2.1 KiB
C++
71 lines
2.1 KiB
C++
/*
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* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
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* its licensors.
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*
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* For complete copyright and license terms please see the LICENSE at the root of this
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* distribution (the "License"). All use of this software is governed by the License,
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* or, if provided, by the license below or the license accompanying this file. Do not
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* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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*
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*/
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// Original file Copyright Crytek GMBH or its affiliates, used under license.
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// Interpolator deals with animations' interpolation.
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// These are bare bones interpolators: they take 3 key values as inputs.
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// The first two specify the two end points(start and end), and the last one specify the interpolation tweenness (x-value).
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// The output is the y-value.
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// For additional time-based playback type animation, see Timeline.
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#ifndef CRYINCLUDE_CRYENGINE_RENDERDLL_COMMON_RENDELEMENTS_INTERPOLATOR_H
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#define CRYINCLUDE_CRYENGINE_RENDERDLL_COMMON_RENDELEMENTS_INTERPOLATOR_H
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#pragma once
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template<class T>
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class Interpolator
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{
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protected:
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virtual T mix(T v0, T v1, float mixRatio)
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{
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return (T)(v0 * (1 - mixRatio) + v1 * mixRatio);
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}
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public:
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virtual ~Interpolator(){}
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virtual T compute(T start, T end, float xValue) = 0;
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};
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template<class T>
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class LinearInterp
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: public Interpolator<T>
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{
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public:
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virtual T compute(T start, T end, float xValue)
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{
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return Interpolator<T>::mix(start, end, xValue);
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}
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};
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template<class T>
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class CubicInterp
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: public Interpolator<T>
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{
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public:
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virtual T compute(T start, T end, float xValue)
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{
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float x = xValue * xValue * (3 - 2 * xValue);
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return Interpolator<T>::mix(start, end, x);
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}
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};
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namespace InterpPredef
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{
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static LinearInterp<float> Linear_FLOAT;
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static LinearInterp<int> Linear_INT;
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static CubicInterp<float> CUBIC_FLOAT;
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static CubicInterp<int> CUBIC_INT;
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}
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#endif // CRYINCLUDE_CRYENGINE_RENDERDLL_COMMON_RENDELEMENTS_INTERPOLATOR_H
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