 | | Re: Quick way to mirror-image a model?
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What about a flag for default behavior? I've been coding to ignore ones with default rotations, but there are plenty of parts (especially slopes) that need a (-1 0 0 0 1 0 0 0 1) rotation applied when reflected front-to-back and it would be nice to (...) (20 years ago, 24-Jun-04, to lugnet.cad)
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| | Re: Quick way to mirror-image a model?
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(...) Total side note: I agree with Don, row/column ordering is not what I would have chosen. BUT, it is far easier (IMO) to hand-transform row/column LDraw commands than the equivalent column/row commands (like I've had to do in POV-Ray code). (...) (20 years ago, 23-Jun-04, to lugnet.cad, lugnet.cad.mlcad)
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| | Re: Mac Brick CAD 2.3b2 (critical bug)
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Following my release of MBC 2.3b2 the other day, I've been notified of a critical crash bug in the editor, where inserting parts will cause the application to crash. I've now posted an update Mac Brick CAD 2.3b3 that fixes this. If you have (...) (20 years ago, 23-Jun-04, to lugnet.cad.dev.mac)
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| | Re: Quick way to mirror-image a model?
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(...) Yes, that looks right. The other thing that messes me up with LDRAW matrices is the row, column ordering. The ordering in LDRAW files is not what I would have chosen, so I always have to look it up. From the old FAQ: (URL) type 1's format is: (...) (20 years ago, 23-Jun-04, to lugnet.cad, lugnet.cad.mlcad)
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| | Re: Quick way to mirror-image a model?
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(...) It's neither commutative [(a * b) * c != a * (b * c)] nor associative [a * b != b * a]. That shouldn't be the problem in the calculation above, since the current matrix was the identity matrix... (...) Looks like you're doing MF = MP * (MC * (...) (20 years ago, 23-Jun-04, to lugnet.cad)
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| | Re: Quick way to mirror-image a model?
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(...) Probably. ;^) (...) Matrix multiplication is not commutative. (distributive? Err, I forget my math terms.) You're doing one or more of the multiplications in the wrong order? Try ME * (MC * MP) instead. Notice I switched the order inside the (...) (20 years ago, 23-Jun-04, to lugnet.cad)
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| | Re: Quick way to mirror-image a model? [DAT]
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(...) Can you or Don check my work? I'm trying to figure out why the ME transform that I did works in my program and the ME that Don put in mirror.ini works in his code, but not vice-versa. The most likely explanation is that I'm doing something (...) (20 years ago, 23-Jun-04, to lugnet.cad)
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| | Re: Quick way to mirror-image a model?
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(...) Ignore the 9 suggestion, I see you're already way ahead of me on flag definition. Don (20 years ago, 23-Jun-04, to lugnet.cad)
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| | Re: Quick way to mirror-image a model?
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(...) Read the comments at the top of MIRROR.INI in the zip file. I already did a bunch of wings. Only tested one though... Is there something special about files starting with 1, or are you taking an alphabetical approach? Sadly, I created my (...) (20 years ago, 23-Jun-04, to lugnet.cad)
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| | Re: Quick way to mirror-image a model?
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(...) and another two: ; 6 = asymmetric ; 7 = asymmetric, but in a non-significant way Part 108 (a shock absorber spring) is getting a 7. Steve (20 years ago, 23-Jun-04, to lugnet.cad)
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