diff options
Diffstat (limited to 'modules/opensimplex/simplex_noise.cpp')
| -rw-r--r-- | modules/opensimplex/simplex_noise.cpp | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/modules/opensimplex/simplex_noise.cpp b/modules/opensimplex/simplex_noise.cpp new file mode 100644 index 0000000000..6d66c7110e --- /dev/null +++ b/modules/opensimplex/simplex_noise.cpp @@ -0,0 +1,257 @@ +/*************************************************************************/ +/* simplex_noise.cpp */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* https://godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2014-2018 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 "simplex_noise.h" + +#include "core/core_string_names.h" + +SimplexNoise::SimplexNoise() { + + seed = 0; + persistance = 0.5; + octaves = 3; + period = 64; + lacunarity = 2.0; + + _init_seeds(); +} + +SimplexNoise::~SimplexNoise() { +} + +void SimplexNoise::_init_seeds() { + for (int i = 0; i < 6; ++i) { + open_simplex_noise(seed + i * 2, &(contexts[i])); + } +} + +void SimplexNoise::set_seed(int p_seed) { + + if (seed == p_seed) + return; + + seed = p_seed; + + _init_seeds(); + + emit_changed(); +} + +int SimplexNoise::get_seed() { + + return seed; +} + +void SimplexNoise::set_octaves(int p_octaves) { + if (p_octaves == octaves) return; + octaves = CLAMP(p_octaves, 1, 6); + emit_changed(); +} + +void SimplexNoise::set_period(float p_period) { + if (p_period == period) return; + period = p_period; + emit_changed(); +} + +void SimplexNoise::set_persistance(float p_persistance) { + if (p_persistance == persistance) return; + persistance = p_persistance; + emit_changed(); +} + +void SimplexNoise::set_lacunarity(float p_lacunarity) { + if (p_lacunarity == lacunarity) return; + lacunarity = p_lacunarity; + emit_changed(); +} + +Ref<Image> SimplexNoise::get_image(int p_width, int p_height) { + + PoolVector<uint8_t> data; + data.resize(p_width * p_height * 4); + + PoolVector<uint8_t>::Write wd8 = data.write(); + + for (int i = 0; i < p_height; i++) { + for (int j = 0; j < p_width; j++) { + float v = get_noise_2d(i, j); + v = v * 0.5 + 0.5; // Normalize [0..1] + uint8_t value = uint8_t(CLAMP(v * 255.0, 0, 255)); + wd8[(i * p_width + j) * 4 + 0] = value; + wd8[(i * p_width + j) * 4 + 1] = value; + wd8[(i * p_width + j) * 4 + 2] = value; + wd8[(i * p_width + j) * 4 + 3] = 255; + } + } + + Ref<Image> image = memnew(Image(p_width, p_height, false, Image::FORMAT_RGBA8, data)); + return image; +} + +Ref<Image> SimplexNoise::get_seamless_image(int p_size) { + + PoolVector<uint8_t> data; + data.resize(p_size * p_size * 4); + + PoolVector<uint8_t>::Write wd8 = data.write(); + + 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 *= 2.0 * Math_PI; + jj *= 2.0 * Math_PI; + + float radius = p_size / (2.0 * Math_PI); + + 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] + uint8_t value = uint8_t(CLAMP(v * 255.0, 0, 255)); + wd8[(i * p_size + j) * 4 + 0] = value; + wd8[(i * p_size + j) * 4 + 1] = value; + wd8[(i * p_size + j) * 4 + 2] = value; + wd8[(i * p_size + j) * 4 + 3] = 255; + } + } + + Ref<Image> image = memnew(Image(p_size, p_size, false, Image::FORMAT_RGBA8, data)); + return image; +} + +void SimplexNoise::_bind_methods() { + + ClassDB::bind_method(D_METHOD("get_seed"), &SimplexNoise::get_seed); + ClassDB::bind_method(D_METHOD("set_seed", "seed"), &SimplexNoise::set_seed); + + ClassDB::bind_method(D_METHOD("set_octaves", "octave_count"), &SimplexNoise::set_octaves); + ClassDB::bind_method(D_METHOD("get_octaves"), &SimplexNoise::get_octaves); + + ClassDB::bind_method(D_METHOD("set_period", "period"), &SimplexNoise::set_period); + ClassDB::bind_method(D_METHOD("get_period"), &SimplexNoise::get_period); + + ClassDB::bind_method(D_METHOD("set_persistance", "persistance"), &SimplexNoise::set_persistance); + ClassDB::bind_method(D_METHOD("get_persistance"), &SimplexNoise::get_persistance); + + ClassDB::bind_method(D_METHOD("set_lacunarity", "lacunarity"), &SimplexNoise::set_lacunarity); + ClassDB::bind_method(D_METHOD("get_lacunarity"), &SimplexNoise::get_lacunarity); + + ClassDB::bind_method(D_METHOD("get_image", "width", "height"), &SimplexNoise::get_image); + ClassDB::bind_method(D_METHOD("get_seamless_image", "size"), &SimplexNoise::get_seamless_image); + + ClassDB::bind_method(D_METHOD("get_noise_2d", "x", "y"), &SimplexNoise::get_noise_2d); + ClassDB::bind_method(D_METHOD("get_noise_3d", "x", "y", "z"), &SimplexNoise::get_noise_3d); + ClassDB::bind_method(D_METHOD("get_noise_4d", "x", "y", "z", "w"), &SimplexNoise::get_noise_4d); + + ClassDB::bind_method(D_METHOD("get_noise_2dv", "pos"), &SimplexNoise::get_noise_2dv); + ClassDB::bind_method(D_METHOD("get_noise_3dv", "pos"), &SimplexNoise::get_noise_3dv); + + ADD_PROPERTY(PropertyInfo(Variant::INT, "seed"), "set_seed", "get_seed"); + ADD_PROPERTY(PropertyInfo(Variant::INT, "octaves", PROPERTY_HINT_RANGE, "1,6,1"), "set_octaves", "get_octaves"); + ADD_PROPERTY(PropertyInfo(Variant::REAL, "period", PROPERTY_HINT_RANGE, "0.1,256.0,0.1"), "set_period", "get_period"); + ADD_PROPERTY(PropertyInfo(Variant::REAL, "persistance", PROPERTY_HINT_RANGE, "0.0,1.0,0.001"), "set_persistance", "get_persistance"); + ADD_PROPERTY(PropertyInfo(Variant::REAL, "lacunarity", PROPERTY_HINT_RANGE, "0.1,4.0,0.01"), "set_lacunarity", "get_lacunarity"); +} + +float SimplexNoise::get_noise_2d(float x, float y) { + + x /= period; + y /= period; + + float amp = 1.0; + float max = 1.0; + float sum = _get_octave_noise_2d(0, x, y); + + unsigned int i = 0; + while (++i < octaves) { + x *= lacunarity; + y *= lacunarity; + amp *= persistance; + max += amp; + sum += _get_octave_noise_2d(i, x, y) * amp; + } + + return sum / max; +} + +float SimplexNoise::get_noise_3d(float x, float y, float z) { + + x /= period; + y /= period; + z /= period; + + float amp = 1.0; + float max = 1.0; + float sum = _get_octave_noise_3d(0, x, y, z); + + unsigned int i = 0; + while (++i < octaves) { + x *= lacunarity; + y *= lacunarity; + z *= lacunarity; + amp *= persistance; + max += amp; + sum += _get_octave_noise_3d(i, x, y, z) * amp; + } + + return sum / max; +} + +float SimplexNoise::get_noise_4d(float x, float y, float z, float w) { + + 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); + + unsigned int i = 0; + while (++i < octaves) { + x *= lacunarity; + y *= lacunarity; + z *= lacunarity; + w *= lacunarity; + amp *= persistance; + max += amp; + sum += _get_octave_noise_4d(i, x, y, z, w) * amp; + } + + return sum / max; +} |