 | | LDDP Coplaner Checks
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Now that the coplaner quad is defined in the LDraw spec by planer normals, the dist and det checks used by LDDP (and L3P) are now outdated. I think these checks should be removed, are there any users out there that would like to see them stay? (...) (15 years ago, 16-Jun-09, to lugnet.cad)
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| | Re: Mirror matrix question
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(...) --snip-- (...) You are right here. In 3D it gets a bit more complicated and, as far as I know, a mirror and rotation corresponds to a mirroring on a plane and a rotation within that plane. I'm sure there is a way to unravel it all but it's (...) (15 years ago, 16-Jun-09, to lugnet.cad)
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| | LD4DStudio 1.1 Beta 1 Available
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I finally completed LD4DStudio 1.1 Beta 1, You will find it on (URL) version introduces a whole boatload of changes and additions, see the release notes section for a complete overview. (URL) also updated the manual and added some technical (...) (15 years ago, 15-Jun-09, to lugnet.cad)
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| | Re: Mirror matrix question
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Hi Kevin, Here's the problem. A mirror plus a rotation can look just like a mirror across another axis. Ugly 2D ASCII art example: .|b --- .|. Mirror the b to the left. d|. --- .|. Rotate 180 degrees. .|. --- .|p That looks just like you mirrored (...) (15 years ago, 15-Jun-09, to lugnet.cad)
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| | Re: Mirror matrix question
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(...) Hi Tim, Thanks. Math is not my specialty, so all help is appreciated. If the user has rotated the mirrored submodel, doesn't the vector normal then also get rotated? The hope was there was a way to separate the mirrored aspect of the rotation (...) (15 years ago, 15-Jun-09, to lugnet.cad)
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| | Re: LSynth 3.0 setup tutorial updated [DAT]
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(...) Thanks. I'll use that one then. Let me take advantage of this thread to suggest the inclusion of another element in the lsynth mpd: the Fibre Optics Cable x400. This is the one that came with the RCX, Spybots and several Exoforce sets, has the (...) (15 years ago, 15-Jun-09, to lugnet.cad.mlcad)
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| | Re: Mirror matrix question
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(...) You can also use SR 3D Builder to build your mirrored/symmetric models. You build a side and the program will build the other, mirrored one. It automatically substitute and rotate non symmetric parts and is compatible with lDraw/MLCad file (...) (15 years ago, 15-Jun-09, to lugnet.cad)
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| | Re: Mirror matrix question
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(...) Not sure if this helps but... If you solve (M11+1) x + M12 y = - M13 M21 x + (M22+1) y = - M23 and then normalise the vector (x,y,1) the result will be a vector normal to the mirroring plane. To test that you indeed have a rotation/mirror you (...) (15 years ago, 15-Jun-09, to lugnet.cad)
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| | Re: LPub Bad results with LDView
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(...) Way back in olden times we created some programs to automate the mirroring process. (URL) anyone feel like testing the programs out to see how well they hold up with all the new parts available today? Don (15 years ago, 15-Jun-09, to lugnet.cad)
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| | Re: Mirror matrix question
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(This should probably have been in lugnet.cad.dev, and I almost put it there, but decided that it wouldn't make much difference.) I don't know the answer to this question. I'm responding any, just to let you know that I did read the question, since (...) (15 years ago, 15-Jun-09, to lugnet.cad)
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| | Re: Mirror matrix question
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(...) I don't think so. (...) What if you mirror it again to get back to an unmirrored state, then run the code in mirwiz to create a submodel that only looks mirrored (but actually just flips pieces to look mirrored and substitutes opposite wedges, (...) (15 years ago, 15-Jun-09, to lugnet.cad)
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| | Re: Transparent colors in POV-Ray
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(...) I'd say that a nice temporary solution would be just to allow a simple stud shrinking option for L3P generated studs and let people deal with LGEO separately. LGEO has less problems in this regard anyway as many of the parts are created as (...) (15 years ago, 15-Jun-09, to lugnet.cad.ray)
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| | Re: LSynth 3.0 setup tutorial updated
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(...) Jetro, The biggest, most important change between LSynth 2 and LSynth 3, is that the bulk of the synthesized result is defined by lsynth.mpd, so that Willy and others can add whole new synthesis types without the need to change the lsynth (...) (15 years ago, 14-Jun-09, to lugnet.cad.mlcad)
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| | Re: LSynth 3.0 setup tutorial updated
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(...) Maybe I'm looking at the wrong installer version, but when I run a case and whitespace insensitive diff I see lots of real changes. New constraints and synth types, orientation and part offset tweaks, etc. Right near the top of the file there (...) (15 years ago, 14-Jun-09, to lugnet.cad.mlcad)
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| | Mirror matrix question
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Hi gang, If I have an LDraw Type 1 line that adds a submodel, and the rotation matrix of the line is a mirrored matrix about one and only one axis, can one calculate which axis the model is mirrored about? Can one do so if the user mirrored *and* (...) (15 years ago, 14-Jun-09, to lugnet.cad)
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| | Re: LPub Bad results with LDView
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(...) Well, scratch that analysis. wing2.ldr and wing1.ldr are exactly the same model. When you added wing2.ldr you *did* use mirror matrix. LPub 4.0.0.2 notices that you used a mirrored matrix, and rendered the wing with the mirror matrix rotation. (...) (15 years ago, 14-Jun-09, to lugnet.cad)
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| | Re: LPub Bad results with LDView
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(...) Hi Jaco, The right wing is being rendered weirdly because LPub thinks that the right wing is being added using a mirror matrix. You have wing1.ldr and wing2.ldr in your model. In theory you could get by with just wing.ldr, because wing2.ldr (...) (15 years ago, 14-Jun-09, to lugnet.cad)
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| | Re: Transparent colors in POV-Ray
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(...) Shrinking/moving the parts seems like the best way to reduce the flickering, so I'm planning to implement that in the 1.2 version of my program. I guess it's also somewhat a post processing issue depending on how much of a perfectionist the (...) (15 years ago, 14-Jun-09, to lugnet.cad.ray)
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| | Re: Transparent colors in POV-Ray
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(...) L3P shrinks whole highlevel parts, thats a feature I was planning to implement later. But if you shrink the whole part the window and brick will still share the same stud dimensions. Shrinking only the studs could cause problems later on when (...) (15 years ago, 14-Jun-09, to lugnet.cad.ray)
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| | Re: Transparent colors in POV-Ray
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(...) I thought that l3p did shrink all the dimensions a little bit, so that two adjacent brick's co-planar surfaces don't appear as one surface. I quote from the L3P web page: Seams between bricks To have more realistic renderings L3P can make a (...) (15 years ago, 14-Jun-09, to lugnet.cad.ray)
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