add mixbox for python

python/README.md

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+# Mixbox for Python
+```
+pip install pymixbox
+```
+
+## Usage
+```python
+import mixbox
+
+rgb1 = (0, 33, 133)  # blue
+rgb2 = (252, 211, 0) # yellow
+t = 0.5              # mixing ratio
+
+rgb_mix = mixbox.lerp(rgb1,rgb2,t)
+
+print(rgb_mix)
+```
+
+## Mixing Multiple Colors
+```python
+z1 = mixbox.rgb_to_latent(rgb1)
+z2 = mixbox.rgb_to_latent(rgb2)
+z3 = mixbox.rgb_to_latent(rgb3)
+
+z_mix = [0] * mixbox.LATENT_SIZE
+
+for i in range(len(z_mix)):     # mix together:
+    z_mix[i] = (0.3*z1[i] +     #   30% of rgb1
+                0.6*z2[i] +     #   60% of rgb2
+                0.1*z3[i])      #   10% of rgb3
+
+rgb_mix = mixbox.latent_to_rgb(z_mix)
+```
+
+## Pigment Colors
+| Pigment |  | RGB | Float RGB | Linear RGB |
+| --- | --- |:----:|:----:|:----:|
+| Cadmium Yellow | <img src="https://scrtwpns.com/mixbox/pigments/cadmium_yellow.png"/> | 254, 236, 0  | 0.996, 0.925, 0.0 | 0.991, 0.839, 0.0 |
+| Hansa Yellow | <img src="https://scrtwpns.com/mixbox/pigments/hansa_yellow.png"/> | 252, 211, 0  | 0.988, 0.827, 0.0 | 0.973, 0.651, 0.0 |
+| Cadmium Orange | <img src="https://scrtwpns.com/mixbox/pigments/cadmium_orange.png"/> | 255, 105, 0  | 1.0, 0.412, 0.0 | 1.0, 0.141, 0.0 |
+| Cadmium Red | <img src="https://scrtwpns.com/mixbox/pigments/cadmium_red.png"/> | 255, 39, 2  | 1.0, 0.153, 0.008 | 1.0, 0.02, 0.001 |
+| Quinacridone Magenta | <img src="https://scrtwpns.com/mixbox/pigments/quinacridone_magenta.png"/> | 128, 2, 46  | 0.502, 0.008, 0.18 | 0.216, 0.001, 0.027 |
+| Cobalt Violet | <img src="https://scrtwpns.com/mixbox/pigments/cobalt_violet.png"/> | 78, 0, 66  | 0.306, 0.0, 0.259 | 0.076, 0.0, 0.054 |
+| Ultramarine Blue | <img src="https://scrtwpns.com/mixbox/pigments/ultramarine_blue.png"/> | 25, 0, 89  | 0.098, 0.0, 0.349 | 0.01, 0.0, 0.1 |
+| Cobalt Blue | <img src="https://scrtwpns.com/mixbox/pigments/cobalt_blue.png"/> | 0, 33, 133  | 0.0, 0.129, 0.522 | 0.0, 0.015, 0.235 |
+| Phthalo Blue | <img src="https://scrtwpns.com/mixbox/pigments/phthalo_blue.png"/> | 13, 27, 68  | 0.051, 0.106, 0.267 | 0.004, 0.011, 0.058 |
+| Phthalo Green | <img src="https://scrtwpns.com/mixbox/pigments/phthalo_green.png"/> | 0, 60, 50  | 0.0, 0.235, 0.196 | 0.0, 0.045, 0.032 |
+| Permanent Green | <img src="https://scrtwpns.com/mixbox/pigments/permanent_green.png"/> | 7, 109, 22  | 0.027, 0.427, 0.086 | 0.002, 0.153, 0.008 |
+| Sap Green | <img src="https://scrtwpns.com/mixbox/pigments/sap_green.png"/> | 107, 148, 4  | 0.42, 0.58, 0.016 | 0.147, 0.296, 0.001 |
+| Burnt Sienna | <img src="https://scrtwpns.com/mixbox/pigments/burnt_sienna.png"/> | 123, 72, 0  | 0.482, 0.282, 0.0 | 0.198, 0.065, 0.0 |
+
+## License
+Copyright (c) 2022, Secret Weapons. All rights reserved.<br>
+Mixbox is provided under the CC BY-NC 4.0 license for non-commercial use only.<br>
+If you want to obtain commercial license, please contact: mixbox@scrtwpns.com

python/examples/blender.py

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+import bpy
+import mixbox
+
+rgb1 = (0.0, 0.015, 0.235) # blue
+rgb2 = (0.973, 0.651, 0.0) # yellow
+
+n = 5
+for i in range(0, n):
+  bpy.ops.mesh.primitive_cube_add(location = ((i - n/2 + 0.5) * 3, 0, 0))
+  mat = bpy.data.materials.new("material")
+  mat.diffuse_color = mixbox.lerp_linear_float(rgb1, rgb2, i / (n - 1))
+  bpy.context.object.active_material = mat

python/examples/hello.py

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+import mixbox
+
+rgb1 = (0, 33, 133)  # blue
+rgb2 = (252, 211, 0) # yellow
+t = 0.5              # mixing ratio
+
+rgb_mix = mixbox.lerp(rgb1, rgb2, t)
+
+print(rgb_mix)

python/examples/npcv.py

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+import cv2
+import numpy as np
+import mixbox
+
+height = 256
+width = 256
+img = np.zeros((height, width, 3), np.uint8)
+
+rgb1 = (0, 33, 133)  # blue
+rgb2 = (252, 211, 0) # yellow
+
+for x in range(0, 256):
+	for y in range(0, 256):
+		img[x, y] = mixbox.lerp(rgb1, rgb2, x / 255.0)
+
+cv2.imshow("image", cv2.cvtColor(img, cv2.COLOR_RGB2BGR))
+cv2.waitKey(0)

python/examples/opengl.py

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+import pygame as pg
+from pygame.locals import *
+
+from OpenGL.GL import *
+from OpenGL.GLU import *
+
+import mixbox
+
+pg.init()
+pg.display.set_mode((640, 480), DOUBLEBUF | OPENGL)
+
+while True:
+  rgb1 = (0.0, 0.129, 0.522) # blue
+  rgb2 = (0.988, 0.827, 0.0) # yellow
+
+  n = 640
+  glBegin(GL_LINES)
+  for i in range(0, n+1):
+    glColor(mixbox.lerp_float(rgb1, rgb2, i / n))
+    glVertex((i / n)*2 - 1, -1)
+    glVertex((i / n)*2 - 1, +1)
+  glEnd()
+
+  pg.display.flip()
+
+  for event in pg.event.get():
+    if event.type == pg.QUIT:
+      pg.quit()
+      quit()

python/examples/pillow.py

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+from PIL import Image
+import mixbox
+
+rgb1 = (0, 33, 133)  # blue
+rgb2 = (252, 211, 0) # yellow
+
+img = Image.new('RGB', (256, 256))
+
+pixels = img.load()
+
+width,height = img.size
+for x in range(width):
+    for y in range(height):
+    	pixels[x, y] = mixbox.lerp(rgb1, rgb2, x / 256.0)
+
+img.show()