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Restructure and refine the noise module

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This commit is contained in:
Hendrik Brucker
2022-04-19 19:48:25 +02:00
parent 3ca4514866
commit bde6fc9c82
15 changed files with 948 additions and 288 deletions
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52
modules/noise/noise.cpp
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@@ -30,13 +30,13 @@
#include "noise.h"
Ref<Image> Noise::get_seamless_image(int p_width, int p_height, bool p_invert, real_t p_blend_skirt) {
Ref<Image> Noise::get_seamless_image(int p_width, int p_height, bool p_invert, bool p_in_3d_space, real_t p_blend_skirt) const {
int skirt_width = p_width * p_blend_skirt;
int skirt_height = p_height * p_blend_skirt;
int src_width = p_width + skirt_width;
int src_height = p_height + skirt_height;
Ref<Image> src = get_image(src_width, src_height, p_invert);
Ref<Image> src = get_image(src_width, src_height, p_invert, p_in_3d_space);
bool grayscale = (src->get_format() == Image::FORMAT_L8);
if (grayscale) {
return _generate_seamless_image<uint8_t>(src, p_width, p_height, p_invert, p_blend_skirt);
@@ -54,6 +54,50 @@ uint8_t Noise::_alpha_blend<uint8_t>(uint8_t p_bg, uint8_t p_fg, int p_alpha) co
return (uint8_t)((alpha * p_fg + inv_alpha * p_bg) >> 8);
}
Ref<Image> Noise::get_image(int p_width, int p_height, bool p_invert, bool p_in_3d_space) const {
Vector<uint8_t> data;
data.resize(p_width * p_height);
uint8_t *wd8 = data.ptrw();
// Get all values and identify min/max values.
Vector<real_t> values;
values.resize(p_width * p_height);
real_t min_val = 1000;
real_t max_val = -1000;
for (int y = 0, i = 0; y < p_height; y++) {
for (int x = 0; x < p_width; x++, i++) {
values.set(i, p_in_3d_space ? get_noise_3d(x, y, 0.0) : get_noise_2d(x, y));
if (values[i] > max_val) {
max_val = values[i];
}
if (values[i] < min_val) {
min_val = values[i];
}
}
}
// Normalize values and write to texture.
uint8_t value;
for (int i = 0, x = 0; i < p_height; i++) {
for (int j = 0; j < p_width; j++, x++) {
if (max_val == min_val) {
value = 0;
} else {
value = uint8_t(CLAMP((values[x] - min_val) / (max_val - min_val) * 255.f, 0, 255));
}
if (p_invert) {
value = 255 - value;
}
wd8[x] = value;
}
}
return memnew(Image(p_width, p_height, false, Image::FORMAT_L8, data));
}
void Noise::_bind_methods() {
// Noise functions.
ClassDB::bind_method(D_METHOD("get_noise_1d", "x"), &Noise::get_noise_1d);
@@ -63,6 +107,6 @@ void Noise::_bind_methods() {
ClassDB::bind_method(D_METHOD("get_noise_3dv", "v"), &Noise::get_noise_3dv);
// Textures.
ClassDB::bind_method(D_METHOD("get_image", "width", "height", "invert"), &Noise::get_image, DEFVAL(false));
ClassDB::bind_method(D_METHOD("get_seamless_image", "width", "height", "invert", "skirt"), &Noise::get_seamless_image, DEFVAL(false), DEFVAL(0.1));
ClassDB::bind_method(D_METHOD("get_image", "width", "height", "invert", "in_3d_space"), &Noise::get_image, DEFVAL(false), DEFVAL(false));
ClassDB::bind_method(D_METHOD("get_seamless_image", "width", "height", "invert", "in_3d_space", "skirt"), &Noise::get_seamless_image, DEFVAL(false), DEFVAL(false), DEFVAL(0.1));
}