kc3-lang/angle/util/random_utils.cpp

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• Hash : 668e507f
  Author :
  Date : 2018-05-24T17:12:14
  

  Revert "GLES1: Entry points for lighting and materials"
  
  This reverts commit 4a09c1a245c406e402b3996b7ed33798b897e60f.
  
  Reason for revert: Seems to break the build
  
  Original change's description:
  > GLES1: Entry points for lighting and materials
  > 
  > - glLight*/glMaterial and their queries
  > - Use new packed enums in these entry points, except for lightmodel
  > which stays GLenum to be consistent with other generic glGet's
  > - State.cpp: New glGet* queries related to light model and
  > light/normal rescale enablement
  > - GLES1State.cpp: Functions to get/set lighting/material state
  > - Validation for lighting/materials
  > 
  > + Add a few convenience methods to random_utils for sampling
  > non-negative floats and a sampler for random booleans
  > 
  > BUG=angleproject:2306
  > 
  > Change-Id: If7ba0c0a0dc75f88fbaa986b904f1ea96ee6512e
  > Reviewed-on: https://chromium-review.googlesource.com/1065502
  > Commit-Queue: Lingfeng Yang <lfy@google.com>
  > Reviewed-by: Geoff Lang <geofflang@chromium.org>
  
  TBR=geofflang@chromium.org,jmadill@chromium.org,cwallez@chromium.org,lfy@google.com
  
  Change-Id: Ifabd708ded87c7484ad6d466508e2c2d6ea2557c
  No-Presubmit: true
  No-Tree-Checks: true
  No-Try: true
  Bug: angleproject:2306
  Reviewed-on: https://chromium-review.googlesource.com/1071828
  Reviewed-by: Lingfeng Yang <lfy@google.com>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• util/random_utils.cpp

• //
  // 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.
  //
  
  #include "random_utils.h"
  
  #include <chrono>
  
  #include <cstdlib>
  
  namespace angle
  {
  
  // Seed from clock
  RNG::RNG()
  {
      long long timeSeed = std::chrono::system_clock::now().time_since_epoch().count();
      mGenerator.seed(static_cast<unsigned int>(timeSeed));
  }
  
  // Seed from fixed number.
  RNG::RNG(unsigned int seed) : mGenerator(seed)
  {
  }
  
  RNG::~RNG()
  {
  }
  
  void RNG::reseed(unsigned int newSeed)
  {
      mGenerator.seed(newSeed);
  }
  
  int RNG::randomInt()
  {
      std::uniform_int_distribution<int> intDistribution;
      return intDistribution(mGenerator);
  }
  
  int RNG::randomIntBetween(int min, int max)
  {
      std::uniform_int_distribution<int> intDistribution(min, max);
      return intDistribution(mGenerator);
  }
  
  unsigned int RNG::randomUInt()
  {
      std::uniform_int_distribution<unsigned int> uintDistribution;
      return uintDistribution(mGenerator);
  }
  
  float RNG::randomFloat()
  {
      std::uniform_real_distribution<float> floatDistribution;
      return floatDistribution(mGenerator);
  }
  
  float RNG::randomFloatBetween(float min, float max)
  {
      std::uniform_real_distribution<float> floatDistribution(min, max);
      return floatDistribution(mGenerator);
  }
  
  float RNG::randomNegativeOneToOne()
  {
      return randomFloatBetween(-1.0f, 1.0f);
  }
  
  }  // namespace angle
  

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