 | | Re: high-res sphere primitive with type 5 lines [DAT]
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Well, based on comments in some other threads, I came to the conclusion that the type 5 lines I had around the edge of my original primitive where wrong. I have now updated them accordingly. This version is the same as the last other than that. The (...) (22 years ago, 5-May-02, to lugnet.cad.dat.parts.primitives)
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| | Re: why re-submit x-4disc files?...
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(...) OK, then someone needs to document that in the files... (For ex.: "0 2002-05-05 MK converted triangles to quads to save space") Thanks, Franklin (22 years ago, 5-May-02, to lugnet.cad.dat.parts.primitives)
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| | Re: high-res sphere primitive with type 5 lines
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(...) Looks good to me. Just yesterday I added type 5 lines to your low res version and submitted them to the tracker. The diference in my version though that I moved the type 5 lines from the very edges of the sphere into the higher 2-8, 4-8, and (...) (22 years ago, 5-May-02, to lugnet.cad.dat.parts.primitives)
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| | Re: why re-submit x-4disc files?...
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(...) I combined the triangles into quads so they save a bit of disk space. It may not seam like much of a savings, but I try to cut out every last bit I possibly can. (22 years ago, 5-May-02, to lugnet.cad.dat.parts.primitives)
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| | high-res sphere primitive with type 5 lines [DAT]
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Well, I finally got around to adding the line type 5 lines to my high-res sphere primitive. (This thanks to the fact that Don Heyse incorporated code from LDGLite to draw them in LDView; thanks Don!) My sphere primitive isn't the same layout as the (...) (22 years ago, 5-May-02, to lugnet.cad.dat.parts.primitives)
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| | why re-submit x-4disc files?...
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Steve, According to the header info for these files, they were released in the most recent update. And yet, you've uploaded new versions of them? What's up? (URL) (22 years ago, 4-May-02, to lugnet.cad.dat.parts.primitives)
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| | Re: ring 3 to 5
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(...) Well, it can matter, but isn't likely to in a LDraw renderer. It would matter if the program ever became fill-rate limited, but that usually won't happen, except with very simple models. --Travis Cobbs (tcobbs@REMOVE.halibut.com) (22 years ago, 4-May-02, to lugnet.cad.dat.parts.primitives)
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| | Re: ring 3 to 5
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(...) have (...) Are you suggesting that there is (should be) a command to prevent primitive substitution, or that the primitive should be inlined? (...) Agreed. What I was more thinking of is the situation (in the minifig arm) where one region is (...) (22 years ago, 4-May-02, to lugnet.cad.dat.parts.primitives)
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| | Re: duplicate primitives?
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(...) I think we should move to using the 4-4ringX nomenclature. a) Copy RINGx.DAT (x=1,2,3,4,7) to 4-4RINGx and RING10.DAT to 4-4RIN10.DAT, replacing with ~moved-to files. b) Make the PT reject new submissions that use the old names? c) Automated (...) (22 years ago, 4-May-02, to lugnet.cad.dat.parts.primitives)
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| | Re: duplicate primitives?
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(...) That makes me feel better, becuase I was the one who submitted those two primitves. We should probably come to some sort of FORMAL decision as to wether to use the old ringX name or move them all into 4-4ringX primitives. (22 years ago, 4-May-02, to lugnet.cad.dat.parts.primitives)
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| | Re: duplicate primitives?
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(...) Sorry, it was a false alarm. There are no duplicated primitives. AFAIK. Steve (22 years ago, 4-May-02, to lugnet.cad.dat.parts.primitives)
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| | duplicate primitives?
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(...) ????? Just out of curiousity, what are these two? Thanks, Franklin (22 years ago, 3-May-02, to lugnet.cad.dat.parts.primitives)
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| | Re: ring 3 to 5
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(...) I understand that. But the question specified that the number of triangles (actually polygons, but feel free to assume triangles) is fixed. (...) So size of the polygons doesn't matter. Hmm. I'll have to remember that. Steve (22 years ago, 3-May-02, to lugnet.cad.dat.parts.primitives)
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| | Re: ring 3 to 5
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(...) I don't know about all situations (POV, etc), but for real-time rendering in OpenGL, the fastest rendering generally occurs with the fewest number of triangles (assuming that the triangles specify the same final geometry). The fact is that (...) (22 years ago, 3-May-02, to lugnet.cad.dat.parts.primitives)
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| | Re: ring 3 to 5
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(...) Not necessarily. We usually stick with units of 1 because they're the most easily scaled, and most easily implied (ie, if every ring has a n:(n+1) ratio of radii, we don't need to state both radii in the filename). OTOH, boxes have side length (...) (22 years ago, 3-May-02, to lugnet.cad.dat.parts.primitives)
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| | Re: ring 3 to 5 [DAT]
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(...) Very true. In some cases (like the minifig arms), is it better to go with an all-polygon approach, or to use primitives as much as possible and fill in the rest with polygons? (...) When filling in around a hole in a flat surface, one should (...) (22 years ago, 3-May-02, to lugnet.cad.dat.parts.primitives)
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| | Re: ring 3 to 5
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(...) There are some complex curved parts (e.g. most of the minifig headwear, the minifig arm I'm working on right now, some wheels) where some regions can be represented by the regular cyli, disc, cyls, cyls2 primitives, but there will be regions (...) (22 years ago, 3-May-02, to lugnet.cad.dat.parts.primitives)
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| | Re: ring 3 to 5
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(...) Yes, otherwise you get anomalies like this one: (URL) the outer ring of the tile got high-quality-ified but the fill in (non primitive?) circle didn't, leaving gaps. Also the plate below it, since it has stud cutouts, isn't as "round" as the (...) (22 years ago, 3-May-02, to lugnet.cad.dat.parts.primitives)
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| | Re: ring 3 to 5
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(...) True. But it's more than nothing. (...) LDraw (and LEdit, I assume) don't cache any files in memory. Read it (line by line), process it, and throw it away. (...) Reducing the number of files may not be important to rendering speed, but it is (...) (22 years ago, 3-May-02, to lugnet.cad.dat.parts.primitives)
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| | Re: ring 3 to 5
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(...) Actually, for rounded elements, it's almost always[1] preferable to use primitives. That way, programs that do primitives substitution can replace the polygonal primitive with a true round object. -- Steve 1) 'almost always' meaning, 'I can't (...) (22 years ago, 3-May-02, to lugnet.cad.dat.parts.primitives)
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