02_01

2025/sketch_2025_02_01/sketch_2025_02_01.py

@@ -0,0 +1,67 @@
+import py5
+import numpy as np
+
+noise_increment = 0.003
+
+def setup():
+    global mesh_x, mesh_y, rgba_map, rgbb_map
+    py5.size(500, 500)
+    py5.color_mode(py5.HSB)
+    csa = [#py5.color(255) if i % 8 else
+           py5.color(i % 255, 200, 200)
+          for i in range(512)]
+
+
+    rgba_map = colors_to_colorarray(csa)
+
+    mesh_x, mesh_y = np.meshgrid(
+        np.arange(0,  py5.width * noise_increment, noise_increment),
+        np.arange(0,  py5.height * noise_increment, noise_increment)
+    )
+
+def draw():
+    global sa, npa
+    py5.rect(0, 0, 500, 500)
+    osna = py5.os_noise(mesh_x + py5.mouse_x * noise_increment,
+                       mesh_y + py5.mouse_y * noise_increment,
+                       py5.frame_count * noise_increment)
+
+    color_indices = py5.remap(osna, -1, 1, 0, len(osna) - 1).astype(np.uint8)
+    npa = rgba_map[color_indices]
+    sa = sort_columns(npa)
+    py5.set_np_pixels(sa, bands="RGBA")
+    py5.window_title(str(round(py5.get_frame_rate(), 1)))
+
+
+def colors_to_colorarray(color_list):
+    return np.dstack((
+        [c >> 16 & 0xFF for c in color_list],
+        [c >> 8 & 0xFF for c in color_list],
+        [c & 0xFF for c in color_list],
+        [0 if c == 255 else 255 for c in color_list], # note 255 is not a color...
+        ))[0]  # it serves as a sentinel value for
+
+def sort_pixels_lexicographic(image_array):
+    global sorted_structured
+    # same as reshape (height*width, 4)
+    flat_image = image_array.reshape(-1, 4)    
+    dtype = [('R', int), ('G', int), ('B', int), ('A', int)]
+    structured = np.array([tuple(row) for row in flat_image], dtype=dtype)    
+    sorted_structured = np.sort(structured, order=['R', 'G', 'B', 'A'])
+    sorted_flat = np.array([tuple(pixel) for pixel in sorted_structured])
+    return sorted_structured.reshape(image_array.shape)
+
+
+def sort_columns(image_array):    
+    #image_array = np.asarray(image_array, dtype=np.uint8)
+    rows, cols, _ = image_array.shape
+    dtype = [('R', np.uint8), ('G', np.uint8), ('B', np.uint8), ('A', np.uint8)]
+    structured = np.array([tuple(p) for p in image_array.reshape(-1, 4)], dtype=dtype)
+    sorted_structured = np.sort(structured.reshape(rows, cols), axis=0)
+    return np.stack([sorted_structured[f] for f in ['R', 'G', 'B', 'A']], axis=-1)
+
+
+def key_pressed():
+    py5.save_frame('out###.png')
+
+py5.run_sketch(block=False)

docs/README.md

@@ -21,6 +21,16 @@ If you appreciate what I have been doing, you may also support my artistic work,
 2025 \| [<b>2024</b>](2024.md) \| [<b>2023</b>](2023.md) \| [<b>2022</b>](2022.md) \| [<b>2021</b>](2021.md) \| [<b>2020</b>](2020.md) \| [<b>2019</b>](2019.md) \| [<b>2018</b>](2018.md) 
 
 
+---
+
+### sketch_2025_02_01
+
+![sketch_2025_02_01](https://raw.githubusercontent.com/villares/sketch-a-day/main/2025/sketch_2025_02_01/sketch_2025_02_01.png)
+
+[sketch_2025_02_01](https://github.com/villares/sketch-a-day/tree/main/2025/sketch_2025_02_01) [[py5](https://py5coding.org/)]
+
+Another #PixelSorting experiment I didn't heve the energy to try yesterday, also from an earlier #OSNoise sketch idea + #NumPy.
+
 ---
 
 ### sketch_2025_01_31