The color scheme to use
Whether extruder is currently on
The current/manual color if color_type is 'manual'
Current Z position
Bounding box for z_gradient calculation
Current point index for sequence colors
Total point count for sequence colors
RGB color array [r, g, b] with values 0-1
Update color for a point based on color_type setting This is called from Point.updateColor() which is invoked from Point.visualize()