text: /*************************************************************************/
  /*  random_pcg.h                                                         */
  /*************************************************************************/
  /*                       This file is part of:                           */
  /*                           GODOT ENGINE                                */
  /*                      https://godotengine.org                          */
  /*************************************************************************/
  /* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur.                 */
  /* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md)    */
  /*                                                                       */
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  /* a copy of this software and associated documentation files (the       */
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  /* without limitation the rights to use, copy, modify, merge, publish,   */
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  /*************************************************************************/
  
  #ifndef RANDOM_PCG_H
  #define RANDOM_PCG_H
  
  #include "core/math/math_defs.h"
  
  #include "thirdparty/misc/pcg.h"
  
  class RandomPCG {
  	pcg32_random_t pcg;
  	uint64_t current_seed; // seed with this to get the same state
  	uint64_t current_inc;
  
  public:
  	static const uint64_t DEFAULT_SEED = 12047754176567800795U;
  	static const uint64_t DEFAULT_INC = PCG_DEFAULT_INC_64;
  	static const uint64_t RANDOM_MAX = 0xFFFFFFFF;
  
  	RandomPCG(uint64_t p_seed = DEFAULT_SEED, uint64_t p_inc = DEFAULT_INC);
  
  	_FORCE_INLINE_ void seed(uint64_t p_seed) {
  		current_seed = p_seed;
  		pcg32_srandom_r(&pcg, current_seed, current_inc);
  	}
  	_FORCE_INLINE_ uint64_t get_seed() { return current_seed; }
  
  	void randomize();
  	_FORCE_INLINE_ uint32_t rand() {
  		current_seed = pcg.state;
  		return pcg32_random_r(&pcg);
  	}
  	_FORCE_INLINE_ double randd() { return (double)rand() / (double)RANDOM_MAX; }
  	_FORCE_INLINE_ float randf() { return (float)rand() / (float)RANDOM_MAX; }
  
  	double random(double p_from, double p_to);
  	float random(float p_from, float p_to);
  	real_t random(int p_from, int p_to) { return (real_t)random((real_t)p_from, (real_t)p_to); }
  };
  
  #endif // RANDOM_PCG_H
  