 | | Smooth surfaces
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Hi, I think the following is of interest in this newsgroup: L3P generates "meshes" of parts from Ldraw, that are not in LGEO and not covered by other special handling. Meshes consist of triangles and there are creases, if triangles from different (...) (23 years ago, 13-Sep-01, to lugnet.cad.ray)
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| | Re: Smooth surfaces
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Lothar Teichert wrote... (...) Hi and welcome Lothar, Yes, I think it is worth to ask him :-) What a brilliant idea. I had completely forgotten about the smooth_triangle. The one example you provide looks very nice. Do you have more examples? Do you (...) (23 years ago, 20-Sep-01, to lugnet.cad.ray)
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| | Re: Smooth surfaces
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(...) Another idea is to choose different angles depending on how long the edges are next to that angle. For longer edges, a smaller bend is more likely to be a real crease. I used to use this sort of heuristic in edge detection image processing (...) (23 years ago, 21-Sep-01, to lugnet.cad.ray)
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| | Re: Smooth surfaces
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(...) Wow! Yes, I'd say it's definitely of interest! At least it is to me. :) (...) Heck yeah! Would there be any point to discussing possible meta-statements, to turn smoothing on and off for different sections of part files? Steve (23 years ago, 21-Sep-01, to lugnet.cad.ray)
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| | Re: Smooth surfaces
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Instead of shoving all these metastatements into files, maybe a file conversion utility (DAT -> POV) should keep an INI file that records which parts can be processed in this way, and which cannot. I'm basing this suggestion on the assumption that (...) (23 years ago, 22-Sep-01, to lugnet.cad.ray)
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| | Re: Smooth surfaces
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My thought was that the smoothing could be turned on and off, as appropriate. That would require metastatements in the parts files. Extra metastatements will slow down processing, but not by very much. They will also increase file size, but again, (...) (23 years ago, 24-Sep-01, to lugnet.cad.ray)
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| | Re: Smooth surfaces
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(...) I agree with Steve. My program is processing mesh by mesh, try it by using the clipboard-feature. You would give away control facilities if there's no control in the dat-file. I'm not familiar with the dat-fileformat and the processing of L3P, (...) (23 years ago, 28-Sep-01, to lugnet.cad.ray)
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| | Re: Smooth surfaces
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Ok (...) (23 years ago, 28-Sep-01, to lugnet.cad.ray)
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| | Re: Smooth surfaces
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I know this is an old discussion, but I really like Steve's idea of meta-statements to control this. What would be really cool is to have all the primitives and parts in the parts library have the meta-statements that simply turn smooth triangles on (...) (22 years ago, 11-Nov-02, to lugnet.cad.ray)
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| | Re: Smooth surfaces
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(...) Actually the meta-statements are probably unnecessary because all the information already exists in the parts in the form of type 2 and type 5 lines. Type 2 lines indicate a hard edge and type 5 lines (or the absence of type 2 lines) indicate (...) (22 years ago, 11-Nov-02, to lugnet.cad.ray)
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