7e2b88a7eb
"open-simplex-noise-in-c" now updated to master and "opensimplex" module refactored accordingly
58 lines
1.7 KiB
C++
58 lines
1.7 KiB
C++
#ifndef OPEN_SIMPLEX_NOISE_H__
|
|
#define OPEN_SIMPLEX_NOISE_H__
|
|
|
|
/*
|
|
* OpenSimplex (Simplectic) Noise in C.
|
|
* Ported to C from Kurt Spencer's java implementation by Stephen M. Cameron
|
|
*
|
|
* v1.1 (October 6, 2014)
|
|
* - Ported to C
|
|
*
|
|
* v1.1 (October 5, 2014)
|
|
* - Added 2D and 4D implementations.
|
|
* - Proper gradient sets for all dimensions, from a
|
|
* dimensionally-generalizable scheme with an actual
|
|
* rhyme and reason behind it.
|
|
* - Removed default permutation array in favor of
|
|
* default seed.
|
|
* - Changed seed-based constructor to be independent
|
|
* of any particular randomization library, so results
|
|
* will be the same when ported to other languages.
|
|
*/
|
|
|
|
#if ((__GNUC_STDC_INLINE__) || (__STDC_VERSION__ >= 199901L))
|
|
#include <stdint.h>
|
|
#define INLINE inline
|
|
#elif (defined (_MSC_VER) || defined (__GNUC_GNU_INLINE__))
|
|
#include <stdint.h>
|
|
#define INLINE __inline
|
|
#else
|
|
/* ANSI C doesn't have inline or stdint.h. */
|
|
#define INLINE
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
// -- GODOT start --
|
|
// Modified to work without allocating memory, also removed some unused function.
|
|
|
|
struct osn_context {
|
|
int16_t perm[256];
|
|
int16_t permGradIndex3D[256];
|
|
};
|
|
|
|
int open_simplex_noise(int64_t seed, struct osn_context *ctx);
|
|
//int open_simplex_noise_init_perm(struct osn_context *ctx, int16_t p[], int nelements);
|
|
// -- GODOT end --
|
|
void open_simplex_noise_free(struct osn_context *ctx);
|
|
double open_simplex_noise2(const struct osn_context *ctx, double x, double y);
|
|
double open_simplex_noise3(const struct osn_context *ctx, double x, double y, double z);
|
|
double open_simplex_noise4(const struct osn_context *ctx, double x, double y, double z, double w);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|