Iges parser - simple manipulating script
23 USDHello,
please reply only, if you have basic english knowledge as my ukrainian is still very below basic.
I need to make small changes to a lot of iges files. scaling, moving or rotating.
For this task, I need a small script, which can be wrapped in a linux shell-script.
This means it can be written in Javascript, Phyton, Perl , etc.
I think the most complicated part will be parsing the file, until you have an array with x,y,z of the points which has to be changed.
Actually there need to be only iges entity 128 and 126 parsed. All the rest can stay as it is.
moving should be clear. (just add the value and write back)
rotating around base point is also just some sinus / cosinus witch each coordinate,
The script should have 4 functions.
1. give bounding box of entities ( min and max of X, Y, Z )
2. move entities
3. rotate entities around zero-point.
4. scale entities.
-> the parameter to invoke the script should be executed in the same order.
-> output to console. so i can pipe it into a file or variable, or whatever I need.
For example:
(scriptname) inputfile.igs mx=5 rz=90 --> move in x 5 units, then rotate around z-axis 90°
attached is an example file:
column73 marks some blocks: S, G and D is not interesting . T also not.
P are entities.
Here All 5P belong together and are one entity (type 128).
Which values are what and where the XYZ coordinates of the points are, is written in iges format description.
https://wiki.eclipse.org/IGES_file_Specification
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