 | | Re: Another matrix inverse question
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(...) Sorry about that. I wrote that code so long ago that I forgot that it wasn't a fully general-purpose matrix inversion routine. (Note that it is the way it is so that it will perform better, not because I was too lazy to do the whole shebang.) (...) (18 years ago, 10-Apr-07, to lugnet.cad)
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| | Re: Another matrix inverse question
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(...) I think you've converted Travis' code properly, but just looking at the code, I'd say it's only intended to produce the inverse of the upper-left 3x3 matrix. None of the other rows or the determinant depend in any way on the 4th row, and it's (...) (18 years ago, 10-Apr-07, to lugnet.cad)
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| | Another matrix inverse question
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Hello, I read James Reynolds' question about inverse matrices and the responses with interest since I similar questions about matrix inverses. I used Travis's TCVector::invertMatrix code as the base for a Java function. Other than the change to Java (...) (18 years ago, 10-Apr-07, to lugnet.cad)
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| | Re: NEW VERSION! Re: Conversion file for ldraw to ldd
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(...) I just uploaded my version 1.01e. This is what I have fixed and found as of today. I’m still working on some problem ones below and I’m at a loss on what to do if anything I could do. If you already downloaded the 1.01A through D you will have (...) (18 years ago, 10-Apr-07, to lugnet.cad.ldd)
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| | Re: POV Color Cheat! Turn Pink into Medium Blue
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(...) I thought it was, but in this case it wasn't. The color 24 line can be skipped. And the double pigment declaration was just a pure mistake; one definition is of course sufficient. :) /Tore (18 years ago, 9-Apr-07, to lugnet.cad.ray)
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| | Re: POV Color Cheat! Turn Pink into Medium Blue
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(...) Good to know. Thanks! (...) I kind of recall that. In some cases, I've seen that L3P ignores an LDraw file with just Type 0 lines. I haven't checked if the IFPOV code makes it not ignore C13-73.dat, but I just did it in a routine manner. /Tore (18 years ago, 9-Apr-07, to lugnet.cad.ray)
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| | Re: POV Color Cheat! Turn Pink into Medium Blue
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(...) If you want to see the medium blue in LDView, just add the following line to C13-73.dat (anywhere outside the IFPOV section): 0 !COLOUR Medium_Blue CODE 13 VALUE #6E99C8 EDGE 0 Tore, is the color 24 line in the file necessary in order to make (...) (18 years ago, 9-Apr-07, to lugnet.cad.ray)
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| | Re: POV Color Cheat! Turn Pink into Medium Blue [DAT]
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(...) This is a great idea that deserves to be highlighted while we're waiting for L3P and other programs to support ldconfig.ldr! Inpired be the objects like timers, dialog objects, menu items etc I add to a Form in a Delphi project, I just came up (...) (18 years ago, 9-Apr-07, to lugnet.cad.ray)
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| | Re: how does a line ends?
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(...) Now that I'm at work, I'm able to look at Microsoft's implementation of fgets for Visual Studio 2005. They do a lock on the file prior to their loop, then call _fgetc_nolock to get each character, instead of fgetc or fread. (That's an (...) (18 years ago, 9-Apr-07, to lugnet.cad, FTX)
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| | Re: Save the 10183 trains!
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(...) Same here on Kubuntu Edgy & RHEL4. Up until LDD 1.4 it worked, but some routines were obviously modified afterwards which use routines not (yet?) supported by WINE. (18 years ago, 9-Apr-07, to lugnet.trains, lugnet.cad.ldd)
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| | Re: Save the 10183 trains!
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(...) Well, it was worth a try. I tried both LDD1.6 and LDD2.0 . Both required a new Linux /lib32 library, libdrm.so.1 . I got that and installed it. LDD1.6 tries to do what looks like some OpenGLL stuff that isn't supported. It *did* manage to (...) (18 years ago, 9-Apr-07, to lugnet.trains, lugnet.cad.ldd)
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| | Re: how does a line ends?
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(...) I thought about using a static instead of ungetc() in the first version of readLine() that I posted. This means that you can only read from one open file at a time, but that is usually an OK restriction as long as the programmer is aware of (...) (18 years ago, 8-Apr-07, to lugnet.cad, FTX)
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| | Re: how does a line ends?
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(...) As long as you only have one character to 'unget' you could probably speed it up by introducing a static char which holds the 'ungetted' char (or null), instead of going through ungetc() -- fgetc(). OTOH, the if-statement to check if there is (...) (18 years ago, 8-Apr-07, to lugnet.cad)
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| | Re: Inverse matrix?
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The latest: (URL) (18 years ago, 8-Apr-07, to lugnet.cad.ray, lugnet.cad)
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| | Re: Inverse matrix?
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(...) Well I'll be! That works too! Thanks you guys! James (18 years ago, 8-Apr-07, to lugnet.cad.ray, lugnet.cad)
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| | Re: Inverse matrix? [DAT]
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(...) Did you mean this: [ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ] [ 1 5 9 13 2 6 10 14 3 7 11 15 4 8 12 16 ] I have yet to try it. James (18 years ago, 8-Apr-07, to lugnet.cad.ray, lugnet.cad)
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| | Re: Inverse matrix?
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(...) I learned my matrix math from a 3d game programming book and I have no idea what the diagonals are... I was going to look it up but I got Travis' code to work! (URL) might still look it up as I may need to know about it) James (18 years ago, 7-Apr-07, to lugnet.cad.ray, lugnet.cad)
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| | Re: Inverse matrix?
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(...) I mean swap the OFF-diagonals, leave the diagonals as is. (...) (18 years ago, 7-Apr-07, to lugnet.cad.ray, lugnet.cad)
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| | Re: how does a line ends?
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(...) Interesting. I looked at the C runtime library sources that came with MSVC++ 6.0. The fgets() function there is definitely a little different than either yours or the one ROSCO linked. It does have a couple calls for thread safety, but (...) (18 years ago, 7-Apr-07, to lugnet.cad, FTX)
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| | Re: Inverse matrix?
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(...) Just take the transpose of the 3x3 world rotation matrix and it should work as the inverse. Transpose means swap diagonals M[1,2] <=> M[2,1] etc. If this doesn't work I've misunderstood you. Tim (18 years ago, 7-Apr-07, to lugnet.cad.ray, lugnet.cad)
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