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pnmimage: Add offset parameters to PNMImage::perlin_noise_fill()

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rdb 2022-01-10 13:00:06 +01:00
parent 6777f19162
commit a1538b4f7c
2 changed files with 5 additions and 3 deletions
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5
panda/src/pnmimage/pnmImage.cxx
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@ -1980,13 +1980,14 @@ quantize(size_t max_colors) {
* PerlinNoise2 class in mathutil. * PerlinNoise2 class in mathutil.
*/ */
void PNMImage:: void PNMImage::
perlin_noise_fill(float sx, float sy, int table_size, unsigned long seed) { perlin_noise_fill(float sx, float sy, int table_size, unsigned long seed,
float ox, float oy) {
float x, y; float x, y;
float noise; float noise;
PerlinNoise2 perlin (sx * _x_size, sy * _y_size, table_size, seed); PerlinNoise2 perlin (sx * _x_size, sy * _y_size, table_size, seed);
for (x = 0; x < _x_size; ++x) { for (x = 0; x < _x_size; ++x) {
for (y = 0; y < _y_size; ++y) { for (y = 0; y < _y_size; ++y) {
noise = perlin.noise(x, y); noise = perlin.noise(x + ox, y + oy);
set_xel(x, y, 0.5 * (noise + 1.0)); set_xel(x, y, 0.5 * (noise + 1.0));
} }
} }

3
panda/src/pnmimage/pnmImage.h
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@ -258,7 +258,8 @@ PUBLISHED:
void make_histogram(Histogram &hist); void make_histogram(Histogram &hist);
void quantize(size_t max_colors); void quantize(size_t max_colors);
BLOCKING void perlin_noise_fill(float sx, float sy, int table_size = 256, BLOCKING void perlin_noise_fill(float sx, float sy, int table_size = 256,
unsigned long seed = 0); unsigned long seed = 0,
float ox = 0, float oy = 0);
void perlin_noise_fill(StackedPerlinNoise2 &perlin); void perlin_noise_fill(StackedPerlinNoise2 &perlin);
void remix_channels(const LMatrix4 &conv); void remix_channels(const LMatrix4 &conv);