From f12a1b88636f6147d2445749d728ecd9585bc3c4 Mon Sep 17 00:00:00 2001 From: JFonS Date: Sat, 25 Aug 2018 00:25:06 +0200 Subject: Add SimplexNoise and NoiseTexture as new resources SimplexNoise can be used to generate parameterized fractal noise based on Open Simplex. NoiseTexture uses SimplexNoise to generate noise textures for using in shaders/visual effects. --- modules/opensimplex/simplex_noise.cpp | 257 ++++++++++++++++++++++++++++++++++ 1 file changed, 257 insertions(+) create mode 100644 modules/opensimplex/simplex_noise.cpp (limited to 'modules/opensimplex/simplex_noise.cpp') 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 SimplexNoise::get_image(int p_width, int p_height) { + + PoolVector data; + data.resize(p_width * p_height * 4); + + PoolVector::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 = memnew(Image(p_width, p_height, false, Image::FORMAT_RGBA8, data)); + return image; +} + +Ref SimplexNoise::get_seamless_image(int p_size) { + + PoolVector data; + data.resize(p_size * p_size * 4); + + PoolVector::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 = 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; +} -- cgit v1.2.3