Updated open-simplex to have const noise functions

"open-simplex-noise-in-c" now updated to master and "opensimplex" module refactored accordingly

(cherry picked from commit 7e2b88a7eb)

modules/opensimplex/open_simplex_noise.cpp

@@ -64,7 +64,7 @@ void OpenSimplexNoise::set_seed(int p_seed) {
 	emit_changed();
 }
 
-int OpenSimplexNoise::get_seed() {
+int OpenSimplexNoise::get_seed() const {
 
 	return seed;
 }
@@ -96,7 +96,7 @@ void OpenSimplexNoise::set_lacunarity(float p_lacunarity) {
 	emit_changed();
 }
 
-Ref<Image> OpenSimplexNoise::get_image(int p_width, int p_height) {
+Ref<Image> OpenSimplexNoise::get_image(int p_width, int p_height) const {
 
 	PoolVector<uint8_t> data;
 	data.resize(p_width * p_height * 4);
@@ -119,7 +119,7 @@ Ref<Image> OpenSimplexNoise::get_image(int p_width, int p_height) {
 	return image;
 }
 
-Ref<Image> OpenSimplexNoise::get_seamless_image(int p_size) {
+Ref<Image> OpenSimplexNoise::get_seamless_image(int p_size) const {
 
 	PoolVector<uint8_t> data;
 	data.resize(p_size * p_size * 4);
@@ -191,12 +191,12 @@ void OpenSimplexNoise::_bind_methods() {
 	ADD_PROPERTY(PropertyInfo(Variant::REAL, "lacunarity", PROPERTY_HINT_RANGE, "0.1,4.0,0.01"), "set_lacunarity", "get_lacunarity");
 }
 
-float OpenSimplexNoise::get_noise_1d(float x) {
+float OpenSimplexNoise::get_noise_1d(float x) const {
 
 	return get_noise_2d(x, 1.0);
 }
 
-float OpenSimplexNoise::get_noise_2d(float x, float y) {
+float OpenSimplexNoise::get_noise_2d(float x, float y) const {
 
 	x /= period;
 	y /= period;
@@ -217,7 +217,7 @@ float OpenSimplexNoise::get_noise_2d(float x, float y) {
 	return sum / max;
 }
 
-float OpenSimplexNoise::get_noise_3d(float x, float y, float z) {
+float OpenSimplexNoise::get_noise_3d(float x, float y, float z) const {
 
 	x /= period;
 	y /= period;
@@ -240,7 +240,7 @@ float OpenSimplexNoise::get_noise_3d(float x, float y, float z) {
 	return sum / max;
 }
 
-float OpenSimplexNoise::get_noise_4d(float x, float y, float z, float w) {
+float OpenSimplexNoise::get_noise_4d(float x, float y, float z, float w) const {
 
 	x /= period;
 	y /= period;

modules/opensimplex/open_simplex_noise.h

@@ -61,7 +61,7 @@ public:
 	void _init_seeds();
 
 	void set_seed(int seed);
-	int get_seed();
+	int get_seed() const;
 
 	void set_octaves(int p_octaves);
 	int get_octaves() const { return octaves; }
@@ -75,22 +75,22 @@ public:
 	void set_lacunarity(float p_lacunarity);
 	float get_lacunarity() const { return lacunarity; }
 
-	Ref<Image> get_image(int p_width, int p_height);
-	Ref<Image> get_seamless_image(int p_size);
+	Ref<Image> get_image(int p_width, int p_height) const;
+	Ref<Image> get_seamless_image(int p_size) const;
 
-	float get_noise_1d(float x);
-	float get_noise_2d(float x, float y);
-	float get_noise_3d(float x, float y, float z);
-	float get_noise_4d(float x, float y, float z, float w);
+	float get_noise_1d(float x) const;
+	float get_noise_2d(float x, float y) const;
+	float get_noise_3d(float x, float y, float z) const;
+	float get_noise_4d(float x, float y, float z, float w) const;
 
-	_FORCE_INLINE_ float _get_octave_noise_2d(int octave, float x, float y) { return open_simplex_noise2(&(contexts[octave]), x, y); }
-	_FORCE_INLINE_ float _get_octave_noise_3d(int octave, float x, float y, float z) { return open_simplex_noise3(&(contexts[octave]), x, y, z); }
-	_FORCE_INLINE_ float _get_octave_noise_4d(int octave, float x, float y, float z, float w) { return open_simplex_noise4(&(contexts[octave]), x, y, z, w); }
+	_FORCE_INLINE_ float _get_octave_noise_2d(int octave, float x, float y) const { return open_simplex_noise2(&(contexts[octave]), x, y); }
+	_FORCE_INLINE_ float _get_octave_noise_3d(int octave, float x, float y, float z) const { return open_simplex_noise3(&(contexts[octave]), x, y, z); }
+	_FORCE_INLINE_ float _get_octave_noise_4d(int octave, float x, float y, float z, float w) const { return open_simplex_noise4(&(contexts[octave]), x, y, z, w); }
 
 	// Convenience
 
-	_FORCE_INLINE_ float get_noise_2dv(Vector2 v) { return get_noise_2d(v.x, v.y); }
-	_FORCE_INLINE_ float get_noise_3dv(Vector3 v) { return get_noise_3d(v.x, v.y, v.z); }
+	_FORCE_INLINE_ float get_noise_2dv(const Vector2 &v) const { return get_noise_2d(v.x, v.y); }
+	_FORCE_INLINE_ float get_noise_3dv(const Vector3 &v) const { return get_noise_3d(v.x, v.y, v.z); }
 
 protected:
 	static void _bind_methods();

thirdparty/README.md

@@ -314,7 +314,7 @@ Collection of single-file libraries used in Godot components.
   * License: Apache 2.0
 - `open-simplex-noise.{c,h}`
   * Upstream: https://github.com/smcameron/open-simplex-noise-in-c
-  * Version: git (0fef0dbedd76f767da7e3c894822729d0f07e54d, 2020) + custom changes
+  * Version: git (826f1dd1724e6fb3ff45f58e48c0fbae864c3403, 2020) + custom changes
   * License: Unlicense
 - `pcg.{cpp,h}`
   * Upstream: http://www.pcg-random.org

thirdparty/misc/open-simplex-noise.c

@@ -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;

thirdparty/misc/open-simplex-noise.h

@@ -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
 	}