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31 lines
541 B
C++
31 lines
541 B
C++
/*
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* smootherstep.h
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*
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* Created on: Jul 25, 2017
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* Author: f4exb
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*/
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#ifndef SDRBASE_UTIL_SMOOTHERSTEP_H_
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#define SDRBASE_UTIL_SMOOTHERSTEP_H_
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class StepFunctions
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{
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public:
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static float smootherstep(float x)
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{
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if (x == 1.0f) {
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return 1.0f;
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} else if (x == 0.0f) {
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return 0.0f;
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}
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double x3 = x * x * x;
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double x4 = x * x3;
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double x5 = x * x4;
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return (float) (6.0*x5 - 15.0*x4 + 10.0*x3);
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}
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};
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#endif /* SDRBASE_UTIL_SMOOTHERSTEP_H_ */
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