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-rw-r--r--modules/opensimplex/open_simplex_noise.cpp250
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diff --git a/modules/opensimplex/open_simplex_noise.cpp b/modules/opensimplex/open_simplex_noise.cpp
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--- a/modules/opensimplex/open_simplex_noise.cpp
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-/*************************************************************************/
-/* open_simplex_noise.cpp */
-/*************************************************************************/
-/* This file is part of: */
-/* GODOT ENGINE */
-/* https://godotengine.org */
-/*************************************************************************/
-/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
-/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
-/* */
-/* Permission is hereby granted, free of charge, to any person obtaining */
-/* a copy of this software and associated documentation files (the */
-/* "Software"), to deal in the Software without restriction, including */
-/* without limitation the rights to use, copy, modify, merge, publish, */
-/* distribute, sublicense, and/or sell copies of the Software, and to */
-/* permit persons to whom the Software is furnished to do so, subject to */
-/* the following conditions: */
-/* */
-/* The above copyright notice and this permission notice shall be */
-/* included in all copies or substantial portions of the Software. */
-/* */
-/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
-/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
-/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
-/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
-/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
-/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
-/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
-/*************************************************************************/
-
-#include "open_simplex_noise.h"
-
-#include "core/core_string_names.h"
-
-OpenSimplexNoise::OpenSimplexNoise() {
- _init_seeds();
-}
-
-OpenSimplexNoise::~OpenSimplexNoise() {
-}
-
-void OpenSimplexNoise::_init_seeds() {
- for (int i = 0; i < MAX_OCTAVES; ++i) {
- open_simplex_noise(seed + i * 2, &(contexts[i]));
- }
-}
-
-void OpenSimplexNoise::set_seed(int p_seed) {
- if (seed == p_seed) {
- return;
- }
-
- seed = p_seed;
-
- _init_seeds();
-
- emit_changed();
-}
-
-int OpenSimplexNoise::get_seed() const {
- return seed;
-}
-
-void OpenSimplexNoise::set_octaves(int p_octaves) {
- if (p_octaves == octaves) {
- return;
- }
-
- ERR_FAIL_COND_MSG(p_octaves > MAX_OCTAVES, vformat("The number of OpenSimplexNoise octaves is limited to %d; ignoring the new value.", MAX_OCTAVES));
-
- octaves = CLAMP(p_octaves, 1, MAX_OCTAVES);
- emit_changed();
-}
-
-void OpenSimplexNoise::set_period(float p_period) {
- if (p_period == period) {
- return;
- }
- period = p_period;
- emit_changed();
-}
-
-void OpenSimplexNoise::set_persistence(float p_persistence) {
- if (p_persistence == persistence) {
- return;
- }
- persistence = p_persistence;
- emit_changed();
-}
-
-void OpenSimplexNoise::set_lacunarity(float p_lacunarity) {
- if (p_lacunarity == lacunarity) {
- return;
- }
- lacunarity = p_lacunarity;
- emit_changed();
-}
-
-Ref<Image> OpenSimplexNoise::get_image(int p_width, int p_height, const Vector2 &p_noise_offset) const {
- Vector<uint8_t> data;
- data.resize(p_width * p_height);
-
- uint8_t *wd8 = data.ptrw();
-
- for (int i = 0; i < p_height; i++) {
- for (int j = 0; j < p_width; j++) {
- float v = get_noise_2d(float(j) + p_noise_offset.x, float(i) + p_noise_offset.y);
- v = v * 0.5 + 0.5; // Normalize [0..1]
- wd8[(i * p_width + j)] = uint8_t(CLAMP(v * 255.0, 0, 255));
- }
- }
-
- Ref<Image> image = memnew(Image(p_width, p_height, false, Image::FORMAT_L8, data));
- return image;
-}
-
-Ref<Image> OpenSimplexNoise::get_seamless_image(int p_size) const {
- Vector<uint8_t> data;
- data.resize(p_size * p_size);
-
- uint8_t *wd8 = data.ptrw();
-
- for (int i = 0; i < p_size; i++) {
- for (int j = 0; j < p_size; j++) {
- float ii = (float)i / (float)p_size;
- float jj = (float)j / (float)p_size;
-
- ii *= Math_TAU;
- jj *= Math_TAU;
-
- float radius = p_size / Math_TAU;
-
- float x = radius * Math::sin(jj);
- float y = radius * Math::cos(jj);
- float z = radius * Math::sin(ii);
- float w = radius * Math::cos(ii);
- float v = get_noise_4d(x, y, z, w);
-
- v = v * 0.5 + 0.5; // Normalize [0..1]
- wd8[(i * p_size + j)] = uint8_t(CLAMP(v * 255.0, 0, 255));
- }
- }
-
- Ref<Image> image = memnew(Image(p_size, p_size, false, Image::FORMAT_L8, data));
- return image;
-}
-
-void OpenSimplexNoise::_bind_methods() {
- ClassDB::bind_method(D_METHOD("get_seed"), &OpenSimplexNoise::get_seed);
- ClassDB::bind_method(D_METHOD("set_seed", "seed"), &OpenSimplexNoise::set_seed);
-
- ClassDB::bind_method(D_METHOD("set_octaves", "octave_count"), &OpenSimplexNoise::set_octaves);
- ClassDB::bind_method(D_METHOD("get_octaves"), &OpenSimplexNoise::get_octaves);
-
- ClassDB::bind_method(D_METHOD("set_period", "period"), &OpenSimplexNoise::set_period);
- ClassDB::bind_method(D_METHOD("get_period"), &OpenSimplexNoise::get_period);
-
- ClassDB::bind_method(D_METHOD("set_persistence", "persistence"), &OpenSimplexNoise::set_persistence);
- ClassDB::bind_method(D_METHOD("get_persistence"), &OpenSimplexNoise::get_persistence);
-
- ClassDB::bind_method(D_METHOD("set_lacunarity", "lacunarity"), &OpenSimplexNoise::set_lacunarity);
- ClassDB::bind_method(D_METHOD("get_lacunarity"), &OpenSimplexNoise::get_lacunarity);
-
- ClassDB::bind_method(D_METHOD("get_image", "width", "height", "noise_offset"), &OpenSimplexNoise::get_image, DEFVAL(Vector2()));
- ClassDB::bind_method(D_METHOD("get_seamless_image", "size"), &OpenSimplexNoise::get_seamless_image);
-
- ClassDB::bind_method(D_METHOD("get_noise_1d", "x"), &OpenSimplexNoise::get_noise_1d);
- ClassDB::bind_method(D_METHOD("get_noise_2d", "x", "y"), &OpenSimplexNoise::get_noise_2d);
- ClassDB::bind_method(D_METHOD("get_noise_3d", "x", "y", "z"), &OpenSimplexNoise::get_noise_3d);
- ClassDB::bind_method(D_METHOD("get_noise_4d", "x", "y", "z", "w"), &OpenSimplexNoise::get_noise_4d);
-
- ClassDB::bind_method(D_METHOD("get_noise_2dv", "pos"), &OpenSimplexNoise::get_noise_2dv);
- ClassDB::bind_method(D_METHOD("get_noise_3dv", "pos"), &OpenSimplexNoise::get_noise_3dv);
-
- ADD_PROPERTY(PropertyInfo(Variant::INT, "seed"), "set_seed", "get_seed");
- ADD_PROPERTY(PropertyInfo(Variant::INT, "octaves", PROPERTY_HINT_RANGE, vformat("1,%d,1", MAX_OCTAVES)), "set_octaves", "get_octaves");
- ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "period", PROPERTY_HINT_RANGE, "0.1,256.0,0.1"), "set_period", "get_period");
- ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "persistence", PROPERTY_HINT_RANGE, "0.0,1.0,0.001"), "set_persistence", "get_persistence");
- ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "lacunarity", PROPERTY_HINT_RANGE, "0.1,4.0,0.01"), "set_lacunarity", "get_lacunarity");
-}
-
-float OpenSimplexNoise::get_noise_1d(float x) const {
- return get_noise_2d(x, 1.0);
-}
-
-float OpenSimplexNoise::get_noise_2d(float x, float y) const {
- x /= period;
- y /= period;
-
- float amp = 1.0;
- float max = 1.0;
- float sum = _get_octave_noise_2d(0, x, y);
-
- int i = 0;
- while (++i < octaves) {
- x *= lacunarity;
- y *= lacunarity;
- amp *= persistence;
- max += amp;
- sum += _get_octave_noise_2d(i, x, y) * amp;
- }
-
- return sum / max;
-}
-
-float OpenSimplexNoise::get_noise_3d(float x, float y, float z) const {
- x /= period;
- y /= period;
- z /= period;
-
- float amp = 1.0;
- float max = 1.0;
- float sum = _get_octave_noise_3d(0, x, y, z);
-
- int i = 0;
- while (++i < octaves) {
- x *= lacunarity;
- y *= lacunarity;
- z *= lacunarity;
- amp *= persistence;
- max += amp;
- sum += _get_octave_noise_3d(i, x, y, z) * amp;
- }
-
- return sum / max;
-}
-
-float OpenSimplexNoise::get_noise_4d(float x, float y, float z, float w) const {
- x /= period;
- y /= period;
- z /= period;
- w /= period;
-
- float amp = 1.0;
- float max = 1.0;
- float sum = _get_octave_noise_4d(0, x, y, z, w);
-
- int i = 0;
- while (++i < octaves) {
- x *= lacunarity;
- y *= lacunarity;
- z *= lacunarity;
- w *= lacunarity;
- amp *= persistence;
- max += amp;
- sum += _get_octave_noise_4d(i, x, y, z, w) * amp;
- }
-
- return sum / max;
-}
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