42 lines
1.1 KiB
C++
42 lines
1.1 KiB
C++
#pragma once
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#include "basics_global.h"
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namespace paysages {
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namespace basics {
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/**
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* Basic math utilities.
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*/
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class BASICSSHARED_EXPORT Maths {
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public:
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/**
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* Constraint a value in the [min,max[ range, by applying a modulo.
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*/
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static double modInRange(double value, double min, double max);
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/**
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* Constraint a value in the [min,max[ range, by clamping it.
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*/
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static double clamp(double x, double minval, double maxval);
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/**
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* Returns 0.0 when x < edge0, 1.0 when y > edge1, and a smoothly interpolated value in-between.
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*/
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static double smoothstep(double edge0, double edge1, double x);
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/**
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* Find the length in a segment (with border values "edge0" and "edge1"), at which the value crosses 0.
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*
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* The length is not normalized (the middle of a segment of length 0.2 is 0.1).
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*/
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static double zeroPoint(double segment_length, double edge0, double edge1);
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static constexpr double PI = 3.141592653589793238462643383279;
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static constexpr double PI_2 = PI / 2.0;
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static constexpr double PI_4 = PI / 4.0;
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static constexpr double TWOPI = 2.0 * PI;
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};
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}
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}
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