Please cite SAGA whenever you use it for your publications:

Creates a grid of the direction (fat) of a line shapes.

Name	Type	Identifier	Description	Constraints
Input
Shapes	shapes, input	INPUT
Target System	grid, input, optional	TARGET_TEMPLATE	use this grid's system for output grids
Output
Grid	grid, output	GRID
Options
Order Field	table field	ORDER_FIELD	Field for order in which the shape will be sorted prior to rasterization.
Target Grid System	choice	TARGET_DEFINITION		Available Choices: [0] user defined [1] grid or grid system Default: 0
Cellsize	floating point number	TARGET_USER_SIZE		Minimum: 0.000000 Default: 1
West	floating point number	TARGET_USER_XMIN		Default: 0
East	floating point number	TARGET_USER_XMAX		Default: 100
South	floating point number	TARGET_USER_YMIN		Default: 0
North	floating point number	TARGET_USER_YMAX		Default: 100
Columns	integer number	TARGET_USER_COLS	Number of cells in East-West direction.	Minimum: 1 Default: 101
Rows	integer number	TARGET_USER_ROWS	Number of cells in North-South direction.	Minimum: 1 Default: 101
Rounding	boolean	TARGET_USER_FLAT	Round bounding coordinates to multiples of cell size. Ignored if cell size has decimal places.	Default: 1
Fit	choice	TARGET_USER_FITS		Available Choices: [0] nodes [1] cells Default: 0