colors

Colors

Tool class to work with colors.

Allows to build color maps and return color values.

__init__()

build_lookup_table(x_min, x_max, cmap='hsv', number_of_colors=256) staticmethod

Create lookup table for cmap.

Parameters:

Name	Type	Description	Default
x_min	float	lower limit of coloring data range.	required
x_max	float	upper limit of coloring data range.	required
cmap	str	color map name.	'hsv'
number_of_colors	int	number of RGB values in lookup table.	256

Returns:

Name	Type	Description
vtkLookupTable	vtkLookupTable	lookup table object.

build_rgb_array_from_cmap(cmap, number_of_colors=256) staticmethod

Return color map based on its name.

Parameters:

Name	Type	Description	Default
cmap	str	Color map name.	required
number_of_colors	int	Number of RGB values in color map.	256

Returns:

Name	Type	Description
list	list	list of RGB values.

get_rgb_from_cmap(val, cmap, val_min=0, val_max=1) staticmethod

Return RGB color values from color map.

Parameters:

Name	Type	Description	Default
val	float	If val_min and val_max not provided a val must be in range 0 <= val <= 1.	required
cmap	str	color map name.	required
val_min	float	Values less than val_min give the same color.	0
val_max	float	Values more than val_max give the same color.	1

Returns:

Name	Type	Description
list	list	list of RGB values.

get_rgb_list_from_cmap(vals, cmap, val_min=None, val_max=None) staticmethod

Return RGB color values from color map.

Parameters:

Name	Type	Description	Default
vals	list	List of values	required
cmap	str	color map name.	required
val_min	float	Values less than val_min give the same color.	None
val_max	float	Values more than val_max give the same color.	None

Returns:

Name	Type	Description
list	list	list of RGB values for each value.

to_rgb(color) staticmethod

Return RGB color values based on their names.

Parameters:

Name	Type	Description	Default
color	(str, list)	color name or RGB(A) values.	required

Returns:

Name	Type	Description
list	list	list of RGB values.