The Random Argument Input

In the previous implementation, the ordering of arguments mattered. Putting length as second argument after height as the first parameter altered the drawing which was not desired for the user.

Considering the same entity wall, creating few walls like:


does not affect the drawing. A vector was created for storing the values of the arguments. The output file I got after splitting removing the delimiters:


and similarly for the other two walls, each line is read and the entity name and variable names are compared and pushed to a vector. After one entity is read completely, it is pushed to another vector which stores the complete data of one entity as a single entry. This data is then extracted to obtain the values of variables, passing them to function that writes to DXF file and create the final drawing.

It can be referred here:

txt to Drawing in LibreCAD

Recently, I have been working with DXF library. My aim has been to take a text file as input from the user which has details of different elements of a building. Currently I am focusing on the wall entity. On parsing the input file, it yields a DXF file as output which can be opened up in softwares that support the DXF format.

To achieve this, I have gone through things beyond the use of DXF library itself. The correct use of regular expressions has been providing the expected results so far. Not much going into the implementation for this post, I have an input text file with details of two walls written as follows:


l depicts the length of the wall. h is height of the wall while cx and cy are coordinates of bottom left corner of the wall.

Following up the format of writing a DXF file including its header, the entities section followed up by the footer, on opening the DXF file, I achieved the drawing similar to the one below:

Screenshot from 2015-09-02 21:33:42