kc3-lang/angle/util/random_utils.cpp

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• Author : Jamie Madill
  Date : 2015-12-15 15:14:08
  Hash : 90c253a6
  Message : Add an instancing perf test. BUG=526217 BUG=angleproject:1164 Change-Id: Ia353a3b2fa0ab0e8b7fd15d72bb63e5ecb7833b1 Reviewed-on: https://chromium-review.googlesource.com/301469 Reviewed-by: Geoff Lang <geofflang@chromium.org> Tryjob-Request: Jamie Madill <jmadill@chromium.org> Tested-by: Jamie Madill <jmadill@chromium.org>

• 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 <time.h>
  #include <cstdlib>
  
  namespace angle
  {
  
  void RandomInitFromTime()
  {
      srand(static_cast<unsigned int>(time(NULL)));
  }
  
  float RandomFloat()
  {
      return static_cast<float>(rand()) / static_cast<float>(RAND_MAX);
  }
  
  float RandomBetween(float min, float max)
  {
      return min + RandomFloat() * (max - min);
  }
  
  float RandomNegativeOneToOne()
  {
      return RandomBetween(0.0f, 1.0f);
  }
  
  }  // namespace angle