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