 | | Sphere tesselation —Travis Cobbs
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| | | Does anyone know how to perform an arbitrary sphere tesselation which ends up with the tesselation used by the LDraw sphere primitives when set to a detail level of 16 (16 being the number of facets around the circumference at the equator). I'll (...) (24 years ago, 9-Sep-00, to lugnet.cad.dev)
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| | | | | Re: Sphere tesselation —Steve Bliss
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| | | | | (...) Nope, sorry. (...) I don't think James used any particular algorithm when he selected points for the sphere p-files. At some point, I'd like to replace the sphere p-files with something better-looking. Something like the 48\1-8sphe.dat I (...) (24 years ago, 11-Sep-00, to lugnet.cad.dev)
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| | | | | | | Re: Sphere tesselation —Travis Cobbs
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| | | | | | "Steve Bliss" <steve.bliss@home.com> wrote in message news:ppnprssksi9anl3...4ax.com... (...) How did you generate this file? It certainly looks like it was algorithmically generated. Don't tell me you figured out all those points BY HAND? I did (...) (24 years ago, 11-Sep-00, to lugnet.cad.dev)
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| | | | | | | | Re: Sphere tesselation —Steve Bliss
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| | | | | | (...) It was a fractal-thingy--it started with a 10-vertex triangular mesh (the three points on the axes, two points along each edge, and the point at the center of the surface of the hemi-demi-semi-sphere). Then it divided each triangle in the mesh (...) (24 years ago, 12-Sep-00, to lugnet.cad.dev)
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| | | | | | | | Re: Sphere tesselation —Travis Cobbs
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| | | | | | "Steve Bliss" <steve.bliss@home.com> wrote in message news:f5csrssq9rkotte...4ax.com... (...) 5 (...) points (...) Thanks for the info. The next thing I'm going to try will be similar, but iterative instead of recursive in order to allow for a set (...) (24 years ago, 12-Sep-00, to lugnet.cad.dev)
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| | | | | | | | Re: Sphere tesselation —Steve Bliss
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| | | | | | (...) I wonder if it's possible to push the (initial?) vertices toward the center. I was playing around with fractaling from a simplest case (1 triangle in the mesh). I noticed the center area was made up of one type of triangle (nearly (...) (24 years ago, 12-Sep-00, to lugnet.cad.dev)
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| | | | | Re: Sphere tesselation —Rui Manuel Silva Martins
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| | | | (...) As far as I know, the sphere is incorrectly tesselated in Ldraw, because it has non-planar quads. So if there is ever going to be a matematical tesselation, which aproaches this form, it won't surelly be a sphere, more like "spheroid", similar (...) (24 years ago, 11-Sep-00, to lugnet.cad.dev)
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| | | | | | Re: Sphere tesselation —Travis Cobbs
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| | | | "Rui Martins" <Rui.Martins@link.pt> wrote in message news:Pine.GSU.4.10.1...0@is-sv... (...) ends (...) a (...) circumference (...) sphere, (...) it has (...) this (...) sphere, (...) Actually, I don't believe the existing one is quite a sphere. I (...) (24 years ago, 11-Sep-00, to lugnet.cad.dev)
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| | | | | | Re: Sphere tesselation —Rui Manuel Silva Martins
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| | | | (...) You got me on that one 8) See ya Rui Martins (24 years ago, 11-Sep-00, to lugnet.cad.dev)
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