 | | Re: DATheader
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(...) version 1.1.1 and 1.1.0 at: (URL) not found :'-( FEHLER 404 Die gewünschte Internet-Seite ist nicht erreichbar. Überprüfen Sie bitte die Adresse oder versuchen Sie es später noch einmal. bye, w. (17 years ago, 15-Apr-07, to lugnet.cad)
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| | Are the metallic colours defined in LDraw?
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Hi all, I was wondering if the metallic colours from Racers sets etc (what I call faux-chrome) have ldraw colours. I can't find the numbers for them but that doesn't guarantee they don't have numbers. In my opinion there should be if there is not as (...) (17 years ago, 15-Apr-07, to lugnet.cad)
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| | Re: DATheader
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I have just uploaded a new version (1.1.1). What has changed: Version 1.1.1 The following testing will be done additionally if you want to save the file: Now you have to set a Liscense Type and BFC Statement. Also you need to set the Author Name. A (...) (17 years ago, 14-Apr-07, to lugnet.cad)
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| | Re: Save the 10183 trains!
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In lugnet.trains, Jeroen de Haan wrote: ... (...) In working with LDD, I've found a couple of tricks. First, even in the instruction mode you can change your viewpoint to see the bricks that have appeared (a "highlight new bricks" feature in the (...) (17 years ago, 13-Apr-07, to lugnet.trains, lugnet.cad.ldd, lugnet.dear-lego)
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| | Re: Another matrix inverse question (and answer?)
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(...) Yes, that makes sense. Looking back at Travis's code, I see that's basically what's happening there, except that some references to the original matrix should be references to the inverse matrix. He probably used it only to invert rotations (...) (18 years ago, 11-Apr-07, to lugnet.cad)
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| | Re: Another matrix inverse question
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(...) Som further clarification... I was back in the 3x3 matrix world when I wrote this: the true inverse of a rotation + translate in psuedo-4x4 notation is as follow [ R11 R12 R13 x R21 R22 R23 y R31 R32 R33 z 0 0 0 1 ] goes to [ R11 R21 R31 xp (...) (18 years ago, 11-Apr-07, to lugnet.cad)
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| | Re: Another matrix inverse question (and answer?)
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(...) If it's only rotations then it should make sense. Another way of passing the information is as follows (M,x) where M is the matrix and x is the translation vector the inverse of this is (Mi,-Mi x) which you can see by showing that an operation (...) (18 years ago, 11-Apr-07, to lugnet.cad)
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| | Re: Another matrix inverse question [DAT]
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(...) You might want to check your row/column order for the converted code from LDView. At least conceptually, I always invision transformation matrices like so: A B C X D E F Y G H I Z 0 0 0 1 Notice that the translation info is in the last column, (...) (18 years ago, 11-Apr-07, to lugnet.cad)
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| | Re: Another matrix inverse question (and answer?)
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(...) I think I just answered my own question. I applied the inverse rotation (calculated by swapping the off-diagonals) to the translation row of the original transformation and then negated it to get the translation row in the inverse. That worked (...) (18 years ago, 11-Apr-07, to lugnet.cad)
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| | Re: Another matrix inverse question
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(...) I can see the advantages of swapping the off-diagonals for inverting the rotation(s), but that still leaves the question of how to invert translations. In a current example I'm looking at, a minifig hand, the hand is rotated 45 degrees, (...) (18 years ago, 11-Apr-07, to lugnet.cad)
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