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Updated open-simplex to have const noise functions

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"open-simplex-noise-in-c" now updated to master and "opensimplex" module refactored accordingly
This commit is contained in:
Sacha Waked
2020-12-04 09:38:42 +01:00
parent 328af1db75
commit 7e2b88a7eb
5 changed files with 33 additions and 33 deletions
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20
thirdparty/misc/open-simplex-noise.c vendored
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@@ -100,27 +100,27 @@ static const signed char gradients4D[] = {
-3, -1, -1, -1, -1, -3, -1, -1, -1, -1, -3, -1, -1, -1, -1, -3,
};
static double extrapolate2(struct osn_context *ctx, int xsb, int ysb, double dx, double dy)
static double extrapolate2(const struct osn_context *ctx, int xsb, int ysb, double dx, double dy)
{
int16_t *perm = ctx->perm;
const int16_t *perm = ctx->perm;
int index = perm[(perm[xsb & 0xFF] + ysb) & 0xFF] & 0x0E;
return gradients2D[index] * dx
+ gradients2D[index + 1] * dy;
}
static double extrapolate3(struct osn_context *ctx, int xsb, int ysb, int zsb, double dx, double dy, double dz)
static double extrapolate3(const struct osn_context *ctx, int xsb, int ysb, int zsb, double dx, double dy, double dz)
{
int16_t *perm = ctx->perm;
int16_t *permGradIndex3D = ctx->permGradIndex3D;
const int16_t *perm = ctx->perm;
const int16_t *permGradIndex3D = ctx->permGradIndex3D;
int index = permGradIndex3D[(perm[(perm[xsb & 0xFF] + ysb) & 0xFF] + zsb) & 0xFF];
return gradients3D[index] * dx
+ gradients3D[index + 1] * dy
+ gradients3D[index + 2] * dz;
}
static double extrapolate4(struct osn_context *ctx, int xsb, int ysb, int zsb, int wsb, double dx, double dy, double dz, double dw)
static double extrapolate4(const struct osn_context *ctx, int xsb, int ysb, int zsb, int wsb, double dx, double dy, double dz, double dw)
{
int16_t *perm = ctx->perm;
const int16_t *perm = ctx->perm;
int index = perm[(perm[(perm[(perm[xsb & 0xFF] + ysb) & 0xFF] + zsb) & 0xFF] + wsb) & 0xFF] & 0xFC;
return gradients4D[index] * dx
+ gradients4D[index + 1] * dy
@@ -227,7 +227,7 @@ void open_simplex_noise_free(struct osn_context *ctx)
// -- GODOT end --
/* 2D OpenSimplex (Simplectic) Noise. */
double open_simplex_noise2(struct osn_context *ctx, double x, double y)
double open_simplex_noise2(const struct osn_context *ctx, double x, double y)
{
/* Place input coordinates onto grid. */
@@ -355,7 +355,7 @@ double open_simplex_noise2(struct osn_context *ctx, double x, double y)
/*
* 3D OpenSimplex (Simplectic) Noise
*/
double open_simplex_noise3(struct osn_context *ctx, double x, double y, double z)
double open_simplex_noise3(const struct osn_context *ctx, double x, double y, double z)
{
/* Place input coordinates on simplectic honeycomb. */
@@ -928,7 +928,7 @@ double open_simplex_noise3(struct osn_context *ctx, double x, double y, double z
/*
* 4D OpenSimplex (Simplectic) Noise.
*/
double open_simplex_noise4(struct osn_context *ctx, double x, double y, double z, double w)
double open_simplex_noise4(const struct osn_context *ctx, double x, double y, double z, double w)
{
double uins;
double dx1, dy1, dz1, dw1;

6
thirdparty/misc/open-simplex-noise.h vendored
View File

@@ -47,9 +47,9 @@ 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(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);
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
}