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rand.h
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1 /*
2 * Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20 * DEALINGS IN THE SOFTWARE.
21 */
22
23 #ifndef __RANDOM_UTILS_H_
24 #define __RANDOM_UTILS_H_
25
26
27 #include <stdlib.h>
28 #include <time.h>
29
30
35 inline float randf( float range_min=0.0f, float range_max=1.0f ) { return ((float(rand()) / RAND_MAX) * (range_max - range_min)) + range_min; }
36
37
42 inline int rand( int range_min, int range_max ) { const float r = (randf() * (range_max - range_min)) + range_min; return int(r); }
43
44
49 inline void srand_time() { srand(time(NULL)); }
50
51
57 //void srand( unsigned int seed );
58
59
60 #endif
61
float randf(float range_min=0.0f, float range_max=1.0f)
Generate a floating-point random number within the specified range.
Definition: rand.h:35
void srand_time()
Seed the random number generator based on the system time.
Definition: rand.h:49
int rand(int range_min, int range_max)
Generate a random integer within the specified range.
Definition: rand.h:42