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import colorsys
import numpy as np
def colorGradient(pos, baseColorRGB, nColors):
# returns rgb=[R,G,B] components from the brightness gradient of the base color
# base_color_rgb - [R,G,B] of the base color
# Ncolors - number of positions in gradient
# color map as gradient of particular color
# starting values
hsv_s = colorsys.rgb_to_hsv(baseColorRGB[0], baseColorRGB[1], baseColorRGB[2])
hue_f = hsv_s[0]
sat_f = hsv_s[1]
val_f = hsv_s[2]
# stop values
hue_s = hue_f
sat_s = 0
val_s = 1
hue = np.linspace(hue_s, hue_f, nColors)
sat = np.linspace(sat_s, sat_f, nColors)
val = np.linspace(val_s, val_f, nColors)
# check that pos is with in the reach
pos = np.floor(pos)
if pos < 1:
pos = 1
if pos > nColors:
pos = nColors
pos = int(pos)
RGB = colorsys.hsv_to_rgb(hue[pos-1], sat[pos-1], val[pos-1])
return RGB
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