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haplokuon / netDxf

.net dxf Reader-Writer
MIT License
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DXF file handling using C#. #391

Open rspardeshi opened 2 years ago

rspardeshi commented 2 years ago

hi, I am trying to read the dxf file in C# and want to read its universal coordinate system. please give me suggestions....

thanks.

haplokuon commented 2 years ago

You will need to be a lot more specific with your questions. As a general rule, if you see a Vector2 as a property of an entity it is defined in local/object coordinate system OCS, if you see a Vector3 it is in world coordinate system WCS.

rspardeshi commented 2 years ago

Thanks for the advice.....actually i have developed one tool which is helpful for arranging the multiple dxf file into one single dxf file. But the problem is if any dxf file UCS is not set correctly or misplaced then that drawing will not be getting placed next to its respective dxf drawing, it will be placed elsewhere. So I want to read the dxf files and relocate their UCS or WCS coordinates at the required position so that all dxf files will be getting arrange in a proper manner.

For example-1 with all dxf having same WCS or UCS coordinates equal gap between each dxf file vertically and horizontally:- Note - this output was achieved by me...

dxf6 dxf7 dxf8 dxf9 dxf10

dxf1 dxf2 dxf3 dxf4 dxf5

For example-2 with one or two dxf having different WCS or UCS coordinates, here dxf2, dxf5 and dxf10 having different UCS than other dxf files:- Note - trying to solve this issue...

dxf6 dxf7 dxf8 dxf9 dxf10 dxf2 dxf5 dxf1 dxf3 dxf4

thanks...

haplokuon commented 2 years ago

Taking into account what I said in my previous post, in a DXF, all points and vectors are saved in the same coordinate system (WCS). Therefore, if a line has a start point of (1,1,1) in WCS, it will always be (1,1,1) no matter the DXF.

A drawing may contain multiple user coordinate system (UCS) that you can find in the UCSs collecition of the drawing; additionally, the drawing can have an active UCS that you can find in the drawing variables property CurrentUCS. So, the transformations between the WCS and UCSs must be performed manually when needed. The class UCS contain a couple methods to help you with this task.