add mixbox for python

python/examples/opengl.py

@@ -0,0 +1,29 @@
+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()