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Add support for generating noise images with an offset.

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This commit is contained in:
Casey Foote
2021-05-17 21:51:05 -07:00
parent 1450a72bfa
commit 97c8d9f348
6 changed files with 31 additions and 6 deletions
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6
modules/opensimplex/open_simplex_noise.cpp
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@@ -96,7 +96,7 @@ void OpenSimplexNoise::set_lacunarity(float p_lacunarity) {
emit_changed();
}
Ref<Image> OpenSimplexNoise::get_image(int p_width, int p_height) const {
Ref<Image> OpenSimplexNoise::get_image(int p_width, int p_height, const Vector2 &p_noise_offset) const {
Vector<uint8_t> data;
data.resize(p_width * p_height);
@@ -104,7 +104,7 @@ Ref<Image> OpenSimplexNoise::get_image(int p_width, int p_height) const {
for (int i = 0; i < p_height; i++) {
for (int j = 0; j < p_width; j++) {
float v = get_noise_2d(j, i);
float v = get_noise_2d(float(j) + p_noise_offset.x, float(i) + p_noise_offset.y);
v = v * 0.5 + 0.5; // Normalize [0..1]
wd8[(i * p_width + j)] = uint8_t(CLAMP(v * 255.0, 0, 255));
}
@@ -161,7 +161,7 @@ void OpenSimplexNoise::_bind_methods() {
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_image", "width", "height", "noise_offset"), &OpenSimplexNoise::get_image, DEFVAL(Vector2()));
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);