Leica

Code for working with Leica laser trackers.

Python Package

The CESAPI Python package modules are in the CESAPI directory. The code that generates CESAPI/packet.py is the creatively-named pygen.py in the top-level directory. The pygen.py script requires the pycparser module to run. It parses the C header file (with all pre-processor directives and comments removed) include/ES_C_API_Def_clean.h and produces variables from enums and classes from structs.

The packet classes have two functions: pack and unpack. The pack function serializes the class member data into a byte string that can be translated by a C program into the struct it was constructed from. The unpack function takes a struct byte string and deserializes it into the member variables.

I have done a manual, rudimentary test on the packet code. If I were a good little boy I would have written unit tests first, but when you only get 15 minutes here and there to work on a project, you tend to want to stick to the fun stuff and the design evolves sporadically.

Python Module Next Steps

• Finish the LTPacketFactory to generate all of the ES_DT_Command type packets
• Write a laser tracker simulator to test the socket code in CESAPI/connection.py
• Write proper unit and integration tests.
• Properly package the Python code.

C++ Library

Things are a bit of a mess right now. I'm not sure what state the C++ code is in as I stopped working on it in favor of furthering a set of pure Python modules.

LTControl.dll CLSIDs

LTConnect: E73780A3-025C-11D5-BBB7-00508B35B332 LTControlAsync: 58DB5620-0186-11D5-BBB6-00508B35B332 LTControlSync: 58DB561E-0186-11D5-BBB6-00508B35B332