colors

Colors definitions and printing methods.

buildLUT

vedo.colors.buildLUT(colorlist, vmin=None, vmax=None, belowColor=None, aboveColor=None, nanColor=None, belowAlpha=1, aboveAlpha=1, nanAlpha=1, interpolate=False)[source]

Generate colors in a lookup table (LUT).

Parameters

  • colorlist (list) – a list in the form [(scalar1, [r,g,b]), (scalar2, 'blue'), ...].

  • vmin (float) – specify minimum value of scalar range

  • vmax (float) – specify maximum value of scalar range

  • belowColor – color for scalars below the minimum in range

  • belowAlpha – alpha for scalars below the minimum in range

  • aboveColor – color for scalars above the maximum in range

  • aboveAlpha – alpha for scalars above the maximum in range

  • nanColor – color for invalid (nan) scalars

  • nanAlpha – alpha for invalid (nan) scalars

  • interpolate (bool) – interpolate or not intermediate scalars

Returns

the lookup table object vtkLookupTable. This can be fed into cmap.

Hint

Example: mesh_lut.py

buildPalette

vedo.colors.buildPalette(color1, color2, N, hsv=True)[source]

Generate N colors starting from color1 to color2 by linear interpolation HSV in or RGB spaces.

Parameters

  • N (int) – number of output colors.

  • color1 – first rgb color.

  • color2 – second rgb color.

  • hsv (bool) – if False, interpolation is calculated in RGB space.

Hint

Example: colorpalette.py

colorMap

vedo.colors.colorMap(value, name='jet', vmin=None, vmax=None)[source]

Map a real value in range [vmin, vmax] to a (r,g,b) color scale.

Parameters

  • value (float, list) – scalar value to transform into a color

  • name (str, matplotlib.colors.LinearSegmentedColormap) – color map name

Returns

(r,g,b) color, or a list of (r,g,b) colors.

Note

Most frequently used color maps:

colormaps

Color maps list:

https://matplotlib.org/1.2.1/_images/show_colormaps.png

Tip

Can also use directly a matplotlib color map:

Example
from vedo import colorMap
import matplotlib.cm as cm
print( colorMap(0.2, cm.flag, 0, 1) )

(1.0, 0.809016994374948, 0.6173258487801733)

getColor

vedo.colors.getColor(rgb=None, hsv=None)[source]

Convert a color or list of colors to (r,g,b) format from many different input formats.

Parameters

hsv (bool) – if set to True, rgb is assumed as (hue, saturation, value).

Example

  • RGB = (255, 255, 255), corresponds to white

  • rgb = (1,1,1) is white

  • hex = #FFFF00 is yellow

  • string = ‘white’

  • string = ‘w’ is white nickname

  • string = ‘dr’ is darkred

  • int = 7 picks color nr. 7 in a predefined color list

  • int = -7 picks color nr. 7 in a different predefined list

colorcubes.py colorcubes.py

getColorName

vedo.colors.getColorName(c)[source]

Find the name of a color.

colorpalette.py colorpalette.py

printc

vedo.colors.printc(*strings, **keys)[source]

Print to terminal in color (any color!).

Parameters

  • c – foreground color name or (r,g,b)

  • bc – background color name or (r,g,b)

  • bold (bool) – boldface [True]

  • italic (bool) – italic [False]

  • blink (bool) – blinking text [False]

  • underline (bool) – underline text [False]

  • strike (bool) – strike through text [False]

  • dim (bool) – make text look dimmer [False]

  • invert (bool) – invert background and forward colors [False]

  • box – print a box with specified text character [‘’]

  • flush (bool) – flush buffer after printing [True]

  • end (str) – the end character to be printed [newline]

Example
from vedo.colors import printc
printc('anything', c='tomato', bold=False, end='' )
printc('anything', 455.5, vtkObject, c='lightblue')
printc(299792.48, c=4)

Hint

printc.py

colorprint.py