import numpy as np
import matplotlib.pyplot as plt
import matplotlib as mpl
# Helper functions
def get_colors(inp, colormap="viridis", normalize=True, vmin=None, vmax=None):
colormap = plt.cm.get_cmap(colormap)
if normalize:
vmin=np.min(inp)
vmax=np.max(inp)
norm = plt.Normalize(vmin, vmax)
return colormap(norm(inp))[:, :3]
def gen_checkers(n_checkers_x, n_checkers_y, width=256, height=256):
# tex dims need to be power of two.
array = np.ones((width, height, 3), dtype='float32')
# width in texels of each checker
checker_w = width / n_checkers_x
checker_h = height / n_checkers_y
for y in range(height):
for x in range(width):
color_key = int(x / checker_w) + int(y / checker_h)
if color_key % 2 == 0:
array[x, y, :] = [ 1., 0.874, 0.0 ]
else:
array[x, y, :] = [ 0., 0., 0. ]
return array
def gen_circle(width=256, height=256):
xx, yy = np.mgrid[:width, :height]
circle = (xx - width/2 + 0.5) ** 2 + (yy - height/2 + 0.5) ** 2
array = np.ones((width, height, 4), dtype='float32')
array[:, :, 0] = (circle <= width)
array[:, :, 1] = (circle <= width)
array[:, :, 2] = (circle <= width)
array[:, :, 3] = circle <= width
return array
def is_notebook():
try:
shell = get_ipython().__class__.__name__
if shell == 'ZMQInteractiveShell':
return True # Jupyter notebook or qtconsole
elif shell == 'TerminalInteractiveShell':
return False # Terminal running IPython
else:
return False # Other type (?)
except NameError:
return False # Probably standard Python interpreter
