Mercurial > hg > dmlib
annotate src/dmperlin.h @ 2577:04c035342960
Attribute code in dmperlin.[ch] to be heavily based on Ken Perlin's original C
implementation, which can be found, for example, at
https://cs.nyu.edu/~perlin/doc/oscar.html#noise
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Sat, 12 Mar 2022 02:42:16 +0200 |
| parents | 85fab9d640ec |
| children | e716a2f18da0 |
| rev | line source |
|---|---|
| 888 | 1 /* |
| 2 * DMLib | |
| 3 * -- Perlin noise functionality | |
|
2577
04c035342960
Attribute code in dmperlin.[ch] to be heavily based on Ken Perlin's original C
Matti Hamalainen <ccr@tnsp.org>
parents:
888
diff
changeset
|
4 * Based heavily on original code (C) Copyright Ken Perlin |
|
04c035342960
Attribute code in dmperlin.[ch] to be heavily based on Ken Perlin's original C
Matti Hamalainen <ccr@tnsp.org>
parents:
888
diff
changeset
|
5 * Adapted and enhanced by Matti 'ccr' Hamalainen |
| 888 | 6 */ |
| 7 #ifndef DMPERLIN_H | |
| 8 #define DMPERLIN_H | |
| 9 | |
| 10 #include "dmlib.h" | |
| 11 | |
| 12 #ifdef __cplusplus | |
| 13 extern "C" { | |
| 14 #endif | |
| 15 | |
| 16 | |
| 17 #define DM_PLNS_B (0x100) | |
| 18 #define DM_PLNS_BM (0x0ff) | |
| 19 #define DM_PLNS_N (0x1000) | |
| 20 | |
| 21 typedef struct | |
| 22 { | |
| 23 int p[DM_PLNS_B + DM_PLNS_B + 2]; | |
| 24 DMFloat g2[DM_PLNS_B + DM_PLNS_B + 2][2]; | |
| 25 DMFloat g1[DM_PLNS_B + DM_PLNS_B + 2]; | |
| 26 } DMPerlinContext; | |
| 27 | |
| 28 | |
| 29 int dmPerlinInit(DMPerlinContext *ctx, const int seed); | |
| 30 DMFloat dmPerlinNoise2D(const DMPerlinContext *ctx, DMFloat x, DMFloat y, DMFloat alpha, DMFloat beta, int n); | |
| 31 | |
| 32 | |
| 33 #ifdef __cplusplus | |
| 34 } | |
| 35 #endif | |
| 36 | |
| 37 #endif // DMPERLIN_H |