Lucas de Vries
52 lines
1.3 KiB
C++
52 lines
1.3 KiB
C++
#pragma once
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#include "vec3.h"
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#include "vec2.h"
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// Generates random numbers with a thread-local generator
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void initRandomizer();
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void freeRandomizer();
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void seed(unsigned long seed);
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//Returns a high-quality random integer (slow)
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unsigned sysRandomi();
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//Random double in (0.0, 1.0)
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double randomd();
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//Random double in (min, max)
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double randomd(double min, double max);
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//Pseudo-normal distribution within min,max
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double normald(double min, double max, int steps = 4);
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//Random float in (0.0, 1.0)
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float randomf();
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//Random float in (min, max)
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float randomf(float min, float max);
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//Random int in [0, INT_MAX]
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unsigned randomi();
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//Random int in [min, max]
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int randomi(int min, int max);
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//Random on sphere surface
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vec3d random3d(double radius = 1.0);
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//Random on a donut sphere
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vec3d random3d(double minRadius, double maxRadius);
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//Random on circle circumference
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vec2d random2d(double radius = 1.0);
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//Random on a donut circle
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vec2d random2d(double minRadius, double maxRadius);
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class RandomEngine {
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public:
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virtual void seed(unsigned initial) = 0;
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virtual unsigned randomi() = 0;
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virtual unsigned randomi(unsigned min, unsigned max) = 0;
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virtual double randomd() = 0;
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virtual double randomd(double min, double max) = 0;
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static RandomEngine* makeMersenne(unsigned seed);
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}; |