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Blog about Libre. CAD, an Open Source 2. D CAD program. Project : Libre. CAD v. 3 Development.
Hi all, this is Gaganjyot Singh here. I am pursuing Bachelors of Computer Science and engineering at Chandigarh Engineering College, Chandigarh, Punjab. This year, I got a chance to. В work for a pure CAD software.
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The Libre. CAD. Libre. CAD had a plan for a version 3 and the creator of Libre. CAD had some code which he created 2 years ago for the v. I begun working on the code. My first priority was to develop, polish and enhance the 2. D kernel. Looking towards the Libre. CAD, the Code is kept pretty modularized so that the user can have choice.
For example the LCviewer. No. Qt contains the code for rendering the drawings on the screen. At the moment the functionality is moved from Qt to Cairo but in future, the user may have an option to choose between Qt, Cairo or may be Open. GL too. This modularity is also designed keeping in mind the extensibility and usability of code.
The LCKernel is a robust 2. D kernel being developed at the moment. So it can be used in any other software which may require such functionalities ( transformations, Intersections etc). Libre. CADv. 3 currently uses Lua as its scripting language, which is pretty finalised. The modularity code allows the developers to add their favourite scripting langauges, may be python, ruby or any preferred. The design principles of the Libre. CAD v. 3 include the immutable concept.
Every entity in the kernel is assigned with an ID at the time of creation. Whenever a transformation is to be processed on entity such as a move or rotate operation, the new data ( Coordinates, Radius, start/end angles ) etc are calculated and a new entity is created at the Coordinates calculated with the same ID and the older entity is deleted. My main project was just concentrated over the kernel but the concepts to be implemented till the mid term were implemented very quicly so I went on implementing other extra functionalities to the code. Tasks completed,Implemented the Move, Copy, Rotate and Scale operations for all the entities.
Implemented Ellipse in kernel and viewer. Implemented Text in kernel and viewer. Implemented Point in kernel and viewer. Implemented Dimensioning in kernel. Implemented Arrowheads in viewer. Implemented MText in kernel.
Spline in kernel. Splitted the Viewer into Viewer. Qt and Viewer. No. Qt part. Ported Libre. CADv. 3 to use CMake. My future work includes,Porting of the Quadratic solvers from v. Implementing the interseciton pattern in v.
Creating the Unit tests. The nature of my project is Dynamic and research based( Sometimes ). So sometimes the code gets implemented before time and sometimes it takes longer then expected. Completing the above remaining tasks, I do expect there will be time left which I will be using in adding extra functionalities to the program.
Expected functionalities which I plan to implement include DXF support, work on the UI portion. My commits, code addition and deletion is as,6. Additions. 15. 44. Deletions. Off Topic: While coding with the Libre. CADv. 3, I shared it with a group of my friends and the played a bit with the Lua scripting and designed marvellous designs.