 | | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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--snip-- (...) I'm not new to matrices and Travis' example is still a little unrigorous which is why I propose the mathematically sound form above. Note the amount of discussion already here because of what people consider 'standard' or 'given' (...) (19 years ago, 23-Aug-07, to lugnet.cad)
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| | Re: MOTM Contest Questions and a Proposal
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Some quick answers... (...) Excellent. Thanks. (...) You should include the unofficial parts as submodels. (...) So long as you invent it then it's yours to submit. We don't want someone to post an MPD of the alternative model shown on the back of (...) (19 years ago, 23-Aug-07, to lugnet.cad.dev.org.ldraw, lugnet.cad)
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| | Re: MOTM Contest Questions and a Proposal
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(...) ... (...) I'm not a contest admin, but I would like to point out that LDView is currently used to render the MOTM/POTM contest entries. So from a purely technical standpoint, it's unlikely that problems will be encountered with unofficial part (...) (19 years ago, 23-Aug-07, to lugnet.cad.dev.org.ldraw, lugnet.cad)
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| | MOTM Contest Questions and a Proposal
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The new minimum-entries rule has inspired me to enter the LDraw.org Model of the Month contest. I have a few questions: 1. Should entries that use unofficial parts (real LEGO parts that are not yet LDraw certified) include those parts in the MPD (...) (19 years ago, 23-Aug-07, to lugnet.cad.dev.org.ldraw, lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(...) If I were new to 3D graphics (and I am ) I would be confused by this, I would have to ask someone else how to interpret the spec. I think Travis' proposal to show the two different matrices that can be built from the line of values is more (...) (19 years ago, 23-Aug-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(...) I think a full worked through example would do the specs a lot of good. If I understand right the line 1 c x y z a b c d e f g h i part.dat transforms any point by the operation (u, v, w)->(x+a*u+b*v+c*w, y+d*u+e*v+f*w, z+g*u+h*v+i*w) With it (...) (19 years ago, 22-Aug-07, to lugnet.cad)
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| | Re: *** LDView Version 3.2 Released ***
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(...) That's the first I've heard of new performance problems in 3.2. I don't think I got any reports of that for the 3.2 Beta, and the 3.2 final is only bug fixes. It certainly runs fine on the computers I've tested it on. Can you copy the first (...) (19 years ago, 22-Aug-07, to lugnet.cad)
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| | Re: *** LDView Version 3.2 Released ***
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(...) Thank you Travis. Is it just me or is this version unusable slow? Drawing anything takes a good few seconds of 100% CPU whereas the same model and settings were almost instant in previous versions. I can go back to some previous build if it (...) (19 years ago, 22-Aug-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(...) I thought I'd add a clarification to the above. A quick look at LDView's (URL) Change History> file will show that I only added support for spaces in submodel filenames in version 3.0. Furthermore, I listed it as an addition, not a bug fix, (...) (19 years ago, 22-Aug-07, to lugnet.cad, FTX)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(...) That's true. However, unless I'm badly mistaken, in addition to the xyz1 being at the end, you also need the other parameters to be in the proper direction in order to get the results that the LDraw library wants. The following two matrices (...) (19 years ago, 22-Aug-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(...) Yes, but look where the x, y, and z are. The example matrix is transposed vs the "standard" one shown in OpenGL text. If you swap the rows and columns in the above matrix, you'll get the OpenGL one. It's an alternate way of expressing a 3D (...) (19 years ago, 22-Aug-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(...) I think we'll just include two examples of how the data would go into a matrix in the two different directions and leave it at that. At this point, I think the best thing would be to add something like the following to the currently proposed (...) (19 years ago, 22-Aug-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(...) The OpenGL 2.1 specification: page 23 Vertex Arrays "Matrices are loaded into these slots in column major order." page 43 Matrices LoadMatrix takes a pointer to a 4 × 4 matrix stored in column-major order as 16 consecutive floating-point (...) (19 years ago, 22-Aug-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(...) You guys are both wrong, OpenGL is NOT column major. This is one of the biggest mistakes I keep hearing people repeat about OpenGL. The API doesn't care if you use column major or row major matrices, it just expects an array of 16 floats with (...) (19 years ago, 21-Aug-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(...) Hi again. What I meant was, I am confused by the (apparent) difference in what the *current* spec says on this issue, and what the new proposed spec says. If you will look at the current spec and scroll down near the end to the Line Format (...) (19 years ago, 22-Aug-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(...) From the standpoint of OpenGL, it uses row-major ordering. There are two ways to draw a transformation matrix. OpenGL uses the following (array offsets shown after): A D G X 0 4 8 12 B E H Y 1 5 9 13 C F I Z 2 6 10 14 0 0 0 1 3 7 11 15 (...) (19 years ago, 22-Aug-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(...) I came across the *current* LDraw file spec here: (URL) the matrix example is using column-major ordering. So now I'm really confused. Does the current spec use column-major, and the new spec is proposing to change it? Or is the current spec (...) (19 years ago, 22-Aug-07, to lugnet.cad)
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| | *** LDView Version 3.2 Released ***
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LDView 3.2 is now available for download from the LDView downloads page here: (URL) Please note that the translations have not yet been updated to work with this release, and translations created for version 3.1 will refuse to load. The 3.2 (...) (19 years ago, 22-Aug-07, to lugnet.announce, lugnet.cad, FTX) !!
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| | Re: Question about LDraw.org Library Header Specification
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(...) Yes. (...) Yes to that too. I've fixed both of these problems. Hopefully I didn't introduce new once (the content system on ldraw.org can be finicky). --Travis (19 years ago, 22-Aug-07, to lugnet.cad)
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| | Question about LDraw.org Library Header Specification
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At this url: (URL) you scroll down to the first Examples header (in bold) there's this line: 0 !CATEGORY Animal 0 !KEYWORDS Sting, Poison, Adventurers, Egypt Is there supposed to be a line break between "Animal" and "0"? Also, a little later in the (...) (19 years ago, 22-Aug-07, to lugnet.cad)
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