3rdparty/c-open-simplex/open-simplex-noise.h

0001 #ifndef OPEN_SIMPLEX_NOISE_H__
0002 #define OPEN_SIMPLEX_NOISE_H__
0003
0004 /*
0005  * OpenSimplex (Simplectic) Noise in C.
0006  * Ported to C from Kurt Spencer's java implementation by Stephen M. Cameron
0007  *
0008  * v1.1 (October 6, 2014)
0009  * - Ported to C
0010  *
0011  * v1.1 (October 5, 2014)
0012  * - Added 2D and 4D implementations.
0013  * - Proper gradient sets for all dimensions, from a
0014  *   dimensionally-generalizable scheme with an actual
0015  *   rhyme and reason behind it.
0016  * - Removed default permutation array in favor of
0017  *   default seed.
0018  * - Changed seed-based constructor to be independent
0019  *   of any particular randomization library, so results
0020  *   will be the same when ported to other languages.
0021  */
0022
0023 #if (defined (__STDC_VERSION__) || defined (__GNUC_STDC_INLINE__))
0024     #if ((__GNUC_STDC_INLINE__) || (__STDC_VERSION__ >= 199901L))
0025         #include <stdint.h>
0026         #define INLINE inline
0027     #endif
0028 #elif (defined (_MSC_VER) || defined (__GNUC_GNU_INLINE__))
0029     #include <stdint.h>
0030     #define INLINE __inline
0031 #else
0032     /* ANSI C doesn't have inline or stdint.h. */
0033     #define INLINE
0034 #endif
0035
0036 #ifdef __cplusplus
0037     extern "C" {
0038 #endif
0039
0040 struct osn_context;
0041
0042 int open_simplex_noise(int64_t seed, struct osn_context **ctx);
0043 void open_simplex_noise_free(struct osn_context *ctx);
0044 int open_simplex_noise_init_perm(struct osn_context *ctx, int16_t p[], int nelements);
0045 double open_simplex_noise2(struct osn_context *ctx, double x, double y);
0046 double open_simplex_noise3(struct osn_context *ctx, double x, double y, double z);
0047 double open_simplex_noise4(struct osn_context *ctx, double x, double y, double z, double w);
0048
0049 #ifdef __cplusplus
0050     }
0051 #endif
0052
0053 #endif