vladislavbelov
ffc4a56b9f
Fixes #6846 Differential Revision: https://code.wildfiregames.com/D5185 This was SVN commit r27965.
94 lines
1.9 KiB
C++
94 lines
1.9 KiB
C++
/* Copyright (C) 2021 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef INCLUDED_SMOOTHEDVALUE
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#define INCLUDED_SMOOTHEDVALUE
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#include "maths/MathUtil.h"
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/**
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* A value with exponential decay towards the target value.
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*/
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class CSmoothedValue
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{
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public:
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CSmoothedValue(float value, float smoothness, float minDelta);
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float GetSmoothedValue() const
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{
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return m_Current;
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}
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void SetValueSmoothly(float value)
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{
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m_Target = value;
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}
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void AddSmoothly(float value)
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{
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m_Target += value;
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}
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void Add(float value)
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{
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m_Target += value;
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m_Current += value;
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}
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float GetValue() const
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{
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return m_Target;
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}
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void SetValue(float value)
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{
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m_Target = value;
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m_Current = value;
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}
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float GetSmoothness() const
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{
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return m_Smoothness;
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}
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void SetSmoothness(float smoothness)
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{
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m_Smoothness = smoothness;
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}
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void ClampSmoothly(float min, float max)
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{
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m_Target = Clamp<double>(m_Target, min, max);
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}
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float Update(float time);
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// Wrap so 'target' is in the range [min, max]
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void Wrap(float min, float max);
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private:
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float m_Smoothness;
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double m_Target; // the value which m_Current is tending towards
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double m_Current;
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// (We use double because the extra precision is worthwhile here)
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float m_MinDelta; // cutoff where we stop moving (to avoid ugly shimmering effects)
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};
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#endif // INCLUDED_SMOOTHEDVALUE
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