Open source Star Ruler 2 source code!

source/game/util/random.h

@@ -0,0 +1,52 @@
+#pragma once
+#include "vec3.h"
+#include "vec2.h"
+
+// Generates random numbers with a thread-local generator
+
+void initRandomizer();
+void freeRandomizer();
+
+void seed(unsigned long seed);
+
+//Returns a high-quality random integer (slow)
+unsigned sysRandomi();
+
+//Random double in (0.0, 1.0)
+double randomd();
+//Random double in (min, max)
+double randomd(double min, double max);
+//Pseudo-normal distribution within min,max
+double normald(double min, double max, int steps = 4);
+
+//Random float in (0.0, 1.0)
+float randomf();
+//Random float in (min, max)
+float randomf(float min, float max);
+
+//Random int in [0, INT_MAX]
+unsigned randomi();
+//Random int in [min, max]
+int randomi(int min, int max);
+
+//Random on sphere surface
+vec3d random3d(double radius = 1.0);
+//Random on a donut sphere
+vec3d random3d(double minRadius, double maxRadius);
+
+//Random on circle circumference
+vec2d random2d(double radius = 1.0);
+//Random on a donut circle
+vec2d random2d(double minRadius, double maxRadius);
+
+
+class RandomEngine {
+public:
+	virtual void seed(unsigned initial) = 0;
+	virtual unsigned randomi() = 0;
+	virtual unsigned randomi(unsigned min, unsigned max) = 0;
+	virtual double randomd() = 0;
+	virtual double randomd(double min, double max) = 0;
+
+	static RandomEngine* makeMersenne(unsigned seed);
+};