stl2gts:tldr:73301
The command "stl2gts < ${filename-stl} > ${filename-gts}" is a shell command that performs the conversion of a 3D model file from the STL format to the GTS (GNU Triangulated Surface) format.
Here's a breakdown of the command:
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"stl2gts" is the name of the executable program that performs the conversion. It is assumed to be installed and available in the system's PATH.
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"<" is a shell redirection operator that is used to read the content of a file and pass it as input to a command. In this case, it is used to input the contents of the file specified by the variable "${filename-stl}" to the "stl2gts" program.
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"${filename-stl}" is a shell variable that represents the name of the STL file to be converted. It is assumed that the variable has been previously defined and contains a valid file name.
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">" is a shell redirection operator that is used to redirect the output of a command to a file. In this case, it is used to direct the output of the "stl2gts" program to the file specified by the variable "${filename-gts}".
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"${filename-gts}" is a shell variable that represents the name of the GTS file that will be created as a result of the conversion. It is assumed that the variable has been previously defined and contains a valid file name.
In summary, this command takes an STL file as input, converts it to the GTS format using the "stl2gts" program, and saves the resulting GTS file with the specified name.