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58 lines
3.0 KiB
C++
58 lines
3.0 KiB
C++
/*****************************************************************************************
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* *
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* OpenSpace *
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* *
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* Copyright (c) 2014-2021 *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this *
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* software and associated documentation files (the "Software"), to deal in the Software *
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* without restriction, including without limitation the rights to use, copy, modify, *
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* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to *
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* permit persons to whom the Software is furnished to do so, subject to the following *
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* conditions: *
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* *
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* The above copyright notice and this permission notice shall be included in all copies *
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* or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, *
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A *
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* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT *
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF *
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE *
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* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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****************************************************************************************/
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#ifndef __OPENSPACE_CORE___DELAYEDVARIABLE___H__
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#define __OPENSPACE_CORE___DELAYEDVARIABLE___H__
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namespace openspace::interaction {
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/**
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* Class that acts as a smoothing filter to a variable. The filter has a step
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* response on a form that resembles the function y = 1-e^(-t/scale). The variable
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* will be updated as soon as it is set to a value (calling the set() function).
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*/
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template <typename T, typename ScaleType>
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class DelayedVariable {
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public:
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DelayedVariable(ScaleType scaleFactor, ScaleType friction);
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void set(T value, double dt);
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void decelerate(double dt);
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void setHard(T value);
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void setFriction(ScaleType friction);
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void setScaleFactor(ScaleType scaleFactor);
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T get() const;
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private:
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ScaleType _scaleFactor;
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ScaleType _friction;
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T _targetValue = T(0);
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T _currentValue = T(0);
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};
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} // namespace openspace::interaction
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#include "delayedvariable.inl"
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#endif // __OPENSPACE_CORE___DELAYEDVARIABLE___H__
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