mirror of
https://github.com/Relintai/pandemonium_engine.git
synced 2024-12-24 04:46:48 +01:00
134 lines
3.6 KiB
Diff
134 lines
3.6 KiB
Diff
diff -u orig/open-simplex-noise.c misc/open-simplex-noise.c
|
|
--- orig/open-simplex-noise.c 2018-09-14 11:11:40.049810000 +0200
|
|
+++ misc/open-simplex-noise.c 2018-09-14 11:09:39.726457000 +0200
|
|
@@ -13,6 +13,11 @@
|
|
* of any particular randomization library, so results
|
|
* will be the same when ported to other languages.
|
|
*/
|
|
+
|
|
+// -- GODOT start --
|
|
+// Modified to work without allocating memory, also removed some unused function.
|
|
+// -- GODOT end --
|
|
+
|
|
#include <math.h>
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
@@ -34,11 +39,12 @@
|
|
|
|
#define DEFAULT_SEED (0LL)
|
|
|
|
-struct osn_context {
|
|
+// -- GODOT start --
|
|
+/*struct osn_context {
|
|
int16_t *perm;
|
|
int16_t *permGradIndex3D;
|
|
-};
|
|
-
|
|
+};*/
|
|
+// -- GODOT end --
|
|
#define ARRAYSIZE(x) (sizeof((x)) / sizeof((x)[0]))
|
|
|
|
/*
|
|
@@ -126,7 +132,9 @@
|
|
int xi = (int) x;
|
|
return x < xi ? xi - 1 : xi;
|
|
}
|
|
-
|
|
+
|
|
+// -- GODOT start --
|
|
+/*
|
|
static int allocate_perm(struct osn_context *ctx, int nperm, int ngrad)
|
|
{
|
|
if (ctx->perm)
|
|
@@ -154,18 +162,21 @@
|
|
memcpy(ctx->perm, p, sizeof(*ctx->perm) * nelements);
|
|
|
|
for (i = 0; i < 256; i++) {
|
|
- /* Since 3D has 24 gradients, simple bitmask won't work, so precompute modulo array. */
|
|
+ // Since 3D has 24 gradients, simple bitmask won't work, so precompute modulo array.
|
|
ctx->permGradIndex3D[i] = (int16_t)((ctx->perm[i] % (ARRAYSIZE(gradients3D) / 3)) * 3);
|
|
}
|
|
return 0;
|
|
}
|
|
+*/
|
|
+// -- GODOT end --
|
|
|
|
/*
|
|
* Initializes using a permutation array generated from a 64-bit seed.
|
|
* Generates a proper permutation (i.e. doesn't merely perform N successive pair
|
|
* swaps on a base array). Uses a simple 64-bit LCG.
|
|
*/
|
|
-int open_simplex_noise(int64_t seed, struct osn_context **ctx)
|
|
+// -- GODOT start --
|
|
+int open_simplex_noise(int64_t seed, struct osn_context *ctx)
|
|
{
|
|
int rc;
|
|
int16_t source[256];
|
|
@@ -174,20 +185,9 @@
|
|
int16_t *permGradIndex3D;
|
|
int r;
|
|
|
|
- *ctx = (struct osn_context *) malloc(sizeof(**ctx));
|
|
- if (!(*ctx))
|
|
- return -ENOMEM;
|
|
- (*ctx)->perm = NULL;
|
|
- (*ctx)->permGradIndex3D = NULL;
|
|
-
|
|
- rc = allocate_perm(*ctx, 256, 256);
|
|
- if (rc) {
|
|
- free(*ctx);
|
|
- return rc;
|
|
- }
|
|
-
|
|
- perm = (*ctx)->perm;
|
|
- permGradIndex3D = (*ctx)->permGradIndex3D;
|
|
+ perm = ctx->perm;
|
|
+ permGradIndex3D = ctx->permGradIndex3D;
|
|
+// -- GODOT end --
|
|
|
|
for (i = 0; i < 256; i++)
|
|
source[i] = (int16_t) i;
|
|
@@ -206,6 +206,8 @@
|
|
return 0;
|
|
}
|
|
|
|
+// -- GODOT start --
|
|
+/*
|
|
void open_simplex_noise_free(struct osn_context *ctx)
|
|
{
|
|
if (!ctx)
|
|
@@ -220,6 +222,8 @@
|
|
}
|
|
free(ctx);
|
|
}
|
|
+*/
|
|
+// -- GODOT end --
|
|
|
|
/* 2D OpenSimplex (Simplectic) Noise. */
|
|
double open_simplex_noise2(struct osn_context *ctx, double x, double y)
|
|
diff -u orig/open-simplex-noise.h misc/open-simplex-noise.h
|
|
--- orig/open-simplex-noise.h 2018-09-14 11:11:19.659807000 +0200
|
|
+++ misc/open-simplex-noise.h 2018-09-14 11:10:05.006460000 +0200
|
|
@@ -35,11 +35,18 @@
|
|
extern "C" {
|
|
#endif
|
|
|
|
-struct osn_context;
|
|
+// -- GODOT start --
|
|
+// Modified to work without allocating memory, also removed some unused function.
|
|
|
|
-int open_simplex_noise(int64_t seed, struct osn_context **ctx);
|
|
+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);
|
|
-int open_simplex_noise_init_perm(struct osn_context *ctx, int16_t p[], int nelements);
|
|
double open_simplex_noise2(struct osn_context *ctx, double x, double y);
|
|
double open_simplex_noise3(struct osn_context *ctx, double x, double y, double z);
|
|
double open_simplex_noise4(struct osn_context *ctx, double x, double y, double z, double w);
|