| Argument | Variable | Type | Length | Range | Default | Description |
| id | Id | str | 1 | | 0 | script id |
| handle | Self | self | 1 | | | handle to self |
| disabled | Disabled | bool | 1 | | 0 | disable execution and piping |
| i | Centerlines | vtkPolyData | 1 | | | the input surface |
| ifile | CenterlinesInputFileName | str | 1 | | | filename for the default Centerlines reader |
| pointarray | PointDataArrayName | str | 1 | | | |
| cellarray | CellDataArrayName | str | 1 | | | |
| legend | Legend | bool | 1 | | 1 | |
| colormap | ColorMap | str | 1 | ["rainbow","blackbody","cooltowarm","grayscale"] | cooltowarm | choose the color map |
| numberofcolors | NumberOfColors | int | 1 | | 256 | number of colors in the color map |
| renderer | vmtkRenderer | vmtkRenderer | 1 | | | external renderer |
| ofile | CenterlinesOutputFileName | str | 1 | | | filename for the default Centerlines writer |
