kc3-lang/angle/util/random_utils.h

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• Hash : f83cbc65
  Author :
  Date : 2016-01-22T15:27:21
  

  Use std::random functions for test and samples RNG.
  
  These standard functions are much more powerful than the C random()
  routines. Use them to improve the random utils, and use a class
  to clean things up further.
  
  This fixes a problem I was having using random_utils where I was
  having trouble generating random 32 bit unsigned integers.
  
  BUG=angleproject:1290
  
  Change-Id: I5081764053d0667a4e323553b7dea531256aa778
  Reviewed-on: https://chromium-review.googlesource.com/323440
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  Tryjob-Request: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Tested-by: Jamie Madill <jmadill@chromium.org>
  

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• util/random_utils.h

• //
  // Copyright (c) 2014 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  // random_utils:
  //   Helper functions for random number generation.
  //
  
  #ifndef UTIL_RANDOM_UTILS_H
  #define UTIL_RANDOM_UTILS_H
  
  // TODO(jmadill): Rework this if Chromium decides to ban <random>
  #include <random>
  
  namespace angle
  {
  
  class RNG
  {
    public:
      // Seed from clock
      RNG();
      // Seed from fixed number.
      RNG(unsigned int seed);
      ~RNG();
  
      void reseed(unsigned int newSeed);
  
      int randomInt();
      int randomIntBetween(int min, int max);
      unsigned int randomUInt();
      float randomFloat();
      float randomFloatBetween(float min, float max);
      float randomNegativeOneToOne();
  
    private:
      std::default_random_engine mGenerator;
  };
  
  }  // namespace angle
  
  #endif // UTIL_RANDOM_UTILS_H
  

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