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[Noise/NoiseTexture2D] Allow disabling normalization

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This commit is contained in:
Hendrik Brucker
2023-01-29 14:56:10 +01:00
parent d01ac9c736
commit d44eb95e93
6 changed files with 76 additions and 37 deletions
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77
modules/noise/noise.cpp
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@@ -32,7 +32,7 @@
#include <float.h>
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 {
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, bool p_normalize) const {
ERR_FAIL_COND_V(p_width <= 0 || p_height <= 0, Ref<Image>());
int skirt_width = MAX(1, p_width * p_blend_skirt);
@@ -40,7 +40,7 @@ Ref<Image> Noise::get_seamless_image(int p_width, int p_height, bool p_invert, b
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, p_in_3d_space);
Ref<Image> src = get_image(src_width, src_height, p_invert, p_in_3d_space, p_normalize);
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);
@@ -58,7 +58,7 @@ 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 {
Ref<Image> Noise::get_image(int p_width, int p_height, bool p_invert, bool p_in_3d_space, bool p_normalize) const {
ERR_FAIL_COND_V(p_width <= 0 || p_height <= 0, Ref<Image>());
Vector<uint8_t> data;
@@ -66,38 +66,49 @@ Ref<Image> Noise::get_image(int p_width, int p_height, bool p_invert, bool p_in_
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 = FLT_MAX;
real_t max_val = -FLT_MAX;
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];
if (p_normalize) {
// Get all values and identify min/max values.
Vector<real_t> values;
values.resize(p_width * p_height);
real_t min_val = FLT_MAX;
real_t max_val = -FLT_MAX;
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 ivalue;
for (int i = 0, x = 0; i < p_height; i++) {
for (int j = 0; j < p_width; j++, x++) {
if (max_val == min_val) {
ivalue = 0;
} else {
ivalue = static_cast<uint8_t>(CLAMP((values[x] - min_val) / (max_val - min_val) * 255.f, 0, 255));
}
// 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;
}
if (p_invert) {
ivalue = 255 - ivalue;
}
wd8[x] = value;
wd8[x] = ivalue;
}
}
} else {
// Without normalization, the expected range of the noise function is [-1, 1].
uint8_t ivalue;
for (int y = 0, i = 0; y < p_height; y++) {
for (int x = 0; x < p_width; x++, i++) {
float value = (p_in_3d_space ? get_noise_3d(x, y, 0.0) : get_noise_2d(x, y));
ivalue = static_cast<uint8_t>(CLAMP(value * 127.5f + 127.5f, 0.0f, 255.0f));
wd8[i] = p_invert ? (255 - ivalue) : ivalue;
}
}
}
@@ -113,6 +124,6 @@ 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", "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));
ClassDB::bind_method(D_METHOD("get_image", "width", "height", "invert", "in_3d_space", "normalize"), &Noise::get_image, DEFVAL(false), DEFVAL(false), DEFVAL(true));
ClassDB::bind_method(D_METHOD("get_seamless_image", "width", "height", "invert", "in_3d_space", "skirt", "normalize"), &Noise::get_seamless_image, DEFVAL(false), DEFVAL(false), DEFVAL(0.1), DEFVAL(true));
}