GCodeLib

GCodeLib

Library for working with toolpath data

The library consists of the following modules:

Modules

Module	Description
GCode	class to represent toolpath data and provide functions to work with path data
GCodeParser	read in GCode
GCodeTransform	shift or rotate toolpath data
GCodeAnalysis	calculate or extract data from toolpath data
GCodeInterpolation	interpolate path equidistantly
GCodeModify	tbd
vtkWriter	write toolpath as .vtk file and generatescalar fields
FFFGCodeCompiler	compile toolpath data to FFF format (RepRap)
LPBFGCodeCompiler	compile toolpath data to LPBF format (ORlas)

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Principles

The library functions are build around the data structures and functions existent in the GCode class.
A printing trajectory is held in a datastructure in a GCode object and consists of SubPaths which themselves consist of PathPoints.
A PathPoint is defined by its position and several machine or trajectory related values, which are:
(X, Y, Z, layerID, dX, dY, dZ, distance, feedrate, extrusion/beam expander, nozzle temp/laser power)

• layerID is a consecutive ID for each layer
• dX/Y/Z is the direction that the print head will go after this point
• distance is the distance to the next PathPoint

A SubPath is a bead or extrusion line that is printed without interruption (e.g. by travel moves) and comprises of PathPoints that define it.
Internally, a SubPath is a vector containing the coordinates of each point and several other information obtained from the GCode file. The Path is a vector containing all SubPath vectors in printing order.