Computer Aided Design : 5680


CAD / 5680	5679 \| 5681

Subject:	Re: VB - parts and transformation matrices, Z-ordering, optional lines, bow-tied quads - help!
Newsgroups:	lugnet.cad
Date:	Tue, 27 Mar 2001 16:06:58 GMT
Viewed:	470 times

> Another Viewer comming up. <:) Maybe, maybe not - I'm trying to build something that will help me draw complicated patterns on existing parts, such as the Darth Maul pattern (75% done). > You are probably Pos-Multiplying the modeling Matrix, instead of > Pre-Multiplying. > I had that problem too ! OK, you've lost me here - I just applied the matrix calculation as-is from the FAQ. What is the difference between Pos- and Pre- multiplying? Dan

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		Re: VB - parts and transformation matrices, Z-ordering, optional lines, bow-tied quads - help!
(...) Imagine you have Modeling Matrix M and another matrix A to multiply it by, like when you use command 1 (one, include of another .DAT file) And you want to keep the final Matrix as a New modelling Matrix (NM) so, you must be doing NM = M . A (...) (24 years ago, 27-Mar-01, to lugnet.cad)

Message is in Reply To:

		Re: VB - parts and transformation matrices, Z-ordering, optional lines, bow-tied quads - help!
(...) Another Viewer comming up. <:) (...) You are probably Pos-Multiplying the modeling Matrix, instead of Pre-Multiplying. I had that problem too ! (...) You could you the Painters Algorithm, but that is going to be slow, but prevents you from (...) (24 years ago, 27-Mar-01, to lugnet.cad)

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