mirror of
https://github.com/godotengine/godot.git
synced 2025-10-31 13:41:03 +00:00
251 lines
8.2 KiB
C++
251 lines
8.2 KiB
C++
/*************************************************************************/
|
|
/* open_simplex_noise.cpp */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
|
|
/* Copyright (c) 2014-2021 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() {
|
|
seed = 0;
|
|
persistence = 0.5;
|
|
octaves = 3;
|
|
period = 64;
|
|
lacunarity = 2.0;
|
|
|
|
_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 {
|
|
PoolVector<uint8_t> data;
|
|
data.resize(p_width * p_height);
|
|
|
|
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]
|
|
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 {
|
|
PoolVector<uint8_t> data;
|
|
data.resize(p_size * p_size);
|
|
|
|
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]
|
|
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"), &OpenSimplexNoise::get_image);
|
|
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::REAL, "period", PROPERTY_HINT_RANGE, "0.1,256.0,0.1"), "set_period", "get_period");
|
|
ADD_PROPERTY(PropertyInfo(Variant::REAL, "persistence", PROPERTY_HINT_RANGE, "0.0,1.0,0.001"), "set_persistence", "get_persistence");
|
|
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) 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;
|
|
}
|