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I want to implement a code to transform a 3D polygon into a horizontal position. So that I can ignore its Z coordinate and apply the 2D polygon area calculation method to find the original area and use other techniques available for 2d. Highly appreciate if anybody provides me the code.

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Sathya are you saying that a question being asked for finding a directx method for polygon manipulation is not related to computer software? – Razack Jun 29 '11 at 6:12
You want to implement something. That's programming which is why it is off-topic here -- as you can read in the FAQ. You should ask on Stack Overflow for programming questions. But then again, this is a terribly bad question and it'll most probably be closed there as well /cc @Sathya – slhck Jun 29 '11 at 8:10
as @slhck mentioned, this is a programming question, off topic for Super User. You might want to ask on Stack Overflow - with details on what you've done. Plz-send-me-codez questions are looked down upon. – Sathya♦ Jun 29 '11 at 8:16
thank you Sathya, I will look for an appropriate forum for this. I am sorry for putting for code what i mean is algorithm, method or snippets – Razack Jun 29 '11 at 8:36
Solution: 1. Get the unit normal vector N to the plane. 2. Get the matrix M that takes N to the unit vector of Z. 3 transform the polygon vertices with the Matrix M – Razack Jul 1 '11 at 4:55
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closed as off topic by Sathya♦ Jun 29 '11 at 5:25

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