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 | | New webmaster at LDraw
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| Hi folks, I'm pleased to announce that Tim Gould has joined the site management team at LDraw.org as website coordinator and will give Orion and myself a helping hand creating and maintaining the pages on the site, manage voting for LDraw.org's (...) (18 years ago, 31-Aug-06, to lugnet.cad, lugnet.cad.dev.org.ldraw)
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ldraw
(score: 0.445)
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| | Re: Parts Releases and the CA
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| (...) With over 50% of the parts by non-CA authors now re-written (see (URL) the list of non-CA authors (with parts still in the library/tracker) is as follows Name (number of parts authored) Chris Alano (5) Eric D'Aragon (1) Fredrik Glöckner (1) (...) (18 years ago, 25-Sep-06, to lugnet.cad.dev.org.ldraw)
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ldraw
(score: 0.445)
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| | Re: Maximum depth of ldraw models?
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| The thread seems to be splitting from the original point, It is a fact that OpenGL generally places a depth of 16 on any transforms. If an LDRAW model in MPD format was presented to OpenGL as a raw data block I suspect that OpenGL would easily hit (...) (18 years ago, 8-Sep-06, to lugnet.cad.dev)
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ldraw
(score: 0.444)
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ldraw
(score: 0.444)
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| | Re: Maximum depth of ldraw models?
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| (...) I found that performance went down somewhat when I copied and pre-translated all the studs too. I could be creating a memory cache penalty. Anyway it is only one matrix multiply per stud (stud is already flattened in itself), which goes onto (...) (18 years ago, 9-Sep-06, to lugnet.cad.dev)
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ldraw
(score: 0.444)
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| | Re: Maximum depth of ldraw models?
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| (...) Actually on modern cards strips are always slower than optmized lists. You can always try adding degenerate triangles to stitch strips together to save the cost of multiple render calls (too bad PC cards don't support a primitive reset index). (...) (18 years ago, 8-Sep-06, to lugnet.cad.dev)
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ldraw
(score: 0.444)
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| | Re: Parts Releases and the CA
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| (...) Here is the list of files in the official library, whose original author has not affirmed the CA. I have not reviewed all of these for comments that indicate they might already have had a complete re-write. Some files are already on the Parts (...) (18 years ago, 11-Sep-06, to lugnet.cad.dev.org.ldraw)
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ldraw
(score: 0.444)
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| | Re: Non-CA parts rewrite
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| Updated to incorporate Guy's post (see (URL) need of re-writing (total 58) Type Number PT? Name p 4-4con0.dat N Cone 0 x 1.0 parts 2336p35.dat Y Space Nose with Black/Silver "V" Pattern parts 2336p36.dat Y Space Nose with Red/Silver "V" Pattern (...) (18 years ago, 16-Sep-06, to lugnet.cad.dev.org.ldraw)
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ldraw
(score: 0.444)
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| | Re: Maximum depth of ldraw models?
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| (...) MPD files don't add that many extra levels... usually only 2, isn't it? Further, the only stacking that generally needs to occur at the mpd level is modification of the modelview matrix, which opengl guarantees a minimum of 32. It's only in (...) (18 years ago, 7-Sep-06, to lugnet.cad.dev)
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ldraw
(score: 0.444)
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| | Non-CA parts rewrite
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| See also (URL) need of re-writing (total 88) Type Number PT? Name p 4-4con0.dat N Cone 0 x 1.0 p connect5.dat N Technic Pin 1.0 with Base Collar and Slots parts 2336p35.dat Y Space Nose with Black/Silver "V" Pattern parts 2336p36.dat Y Space Nose (...) (18 years ago, 15-Sep-06, to lugnet.cad.dev.org.ldraw)
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ldraw
(score: 0.444)
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| | Re: Maximum depth of ldraw models?
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| (...) Okay... 15% speedup is substantial... that means that it's better to pre-transform the subfiles when generating the operations for the current file. I won't worry about the maximum depth any more then. (...) How does a renderer know which (...) (18 years ago, 7-Sep-06, to lugnet.cad.dev)
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ldraw
(score: 0.444)
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| | Re: Maximum depth of ldraw models?
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| (...) Hmm. I use MPD models a lot, there can be several levels of nesting within a single .mpd file, and I have been known to refer to .mpd files from other .mpd files. I'm not sure how deep my nesting of model files goes, but I'd be a little (...) (18 years ago, 6-Sep-06, to lugnet.cad.dev)
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ldraw
(score: 0.444)
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| | Re: Maximum depth of ldraw models?
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| (...) Well, typically the multiplies that occur for different studs have the same rotation and scaling aspects, the only thing different is the position. So instead of repeating the multiplication on the original matrix, if the top left 3x3 values (...) (18 years ago, 7-Sep-06, to lugnet.cad.dev)
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ldraw
(score: 0.444)
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| | Re: Maximum depth of ldraw models?
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| (...) Same here for LDView. LDView always flattens part geometry, and this seems to improve performance enough to be noticed. LDView does use a display list for each part, and a nested display list for each nesting level above that (as long as you (...) (18 years ago, 7-Sep-06, to lugnet.cad.dev)
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ldraw
(score: 0.444)
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| | Re: Maximum depth of ldraw models?
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| (...) I tested the performance of, and saw a decent gain from flattening part geometry. (Perhaps 15% in BrickDraw3D for QuickDraw3D or OpenGL.) What this means is that when a part is prepared into a drawing list, it is not a list of calls to (...) (18 years ago, 7-Sep-06, to lugnet.cad.dev)
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ldraw
(score: 0.444)
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| | Maximum depth of ldraw models?
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| I notice that no maximum depth is given by the standard. How potentially non-compliant would a renderer be if it fails because parts in a model are too deeply nested (a maximum of as little as 16 on some OpenGL implementations). I notice that no (...) (18 years ago, 6-Sep-06, to lugnet.cad.dev)
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ldraw
(score: 0.444)
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ldraw
(score: 0.444)
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ldraw
(score: 0.443)
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| | Re: Maximum depth of ldraw models?
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| (...) As far as building instructions go, LPub only provides for unique background color/backdrop for up to four levels. This is about as much as I've ever seen in LEGO building instructions. The renderers take care of nesting within individual part (...) (18 years ago, 7-Sep-06, to lugnet.cad.dev)
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ldraw
(score: 0.443)
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ldraw
(score: 0.443)
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