 | | Re: Possible replacement for 1-8sphe.dat
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"Manfred Moolhuysen" <moom@nospamchello.nl> wrote in message news:G1AHn2.3Ir@lugnet.com... (...) on (...) opinion, (...) number (...) The even distribution of points means that the polygons involved stay closer to the surface of an actual sphere at (...) (24 years ago, 22-Sep-00, to lugnet.cad.dat.parts.primitives)
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| | Re: Possible replacement for 1-8sphe.dat
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(...) However, if there is a general feeling that a sphere primitive with an even distibution of triangles is a far better option, I'm prepaired to withdraw my submission (made August 22th) in favour for a 4 decimal places version the primitive (...) (24 years ago, 22-Sep-00, to lugnet.cad.dat.parts.primitives)
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| | Re: Possible replacement for 1-8sphe.dat
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(...) Please tell me what the benefit is of your even distribution of triangles over the currend distribution whith 9 quads and 4 triangles? To my opinion, this factor alone doesn't seem to result into any severe deformations in renderings with (...) (24 years ago, 22-Sep-00, to lugnet.cad.dat.parts.primitives)
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| | Re: Possible replacement for 1-8sphe.dat
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(...) Following an initiative by Axel Poqué, I've resubmitted an improved version of the original 1-8sphe.dat primitive for the next update. This version still has 9 quads and 4 triangles, but coplanarity and meeting the surface of the sphere falls (...) (24 years ago, 22-Sep-00, to lugnet.cad.dat.parts.primitives)
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| | Re: Possible replacement for 1-8sphe.dat
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I'm sorry for breaking my reply up intp little pieces, but for an unnown reason I'm not able to post any long message to Lugnet for the past 4 days. (...) Please make that 4 decimal places, for all the other curved primitives that the 1-8sphe.dat (...) (24 years ago, 22-Sep-00, to lugnet.cad.dat.parts.primitives)
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| | Re: Possible replacement for 1-8sphe.dat
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(...) I think these should have 4 decimal places, as with the majority of the circular primitives. The reason for this is that there is often a need to use 3DPs in parts. Where these include circular primitives and scale them up by a factor of 10 (...) (24 years ago, 21-Sep-00, to lugnet.cad.dat.parts.primitives)
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| | Re: Possible replacement for 1-8sphe.dat
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"Steve Bliss" <steve.bliss@home.com> wrote in message news:ni4kssg6gejoaju...4ax.com... (...) on (...) files (...) I actually looked at all of the files that contain the string sphe while checking to see the results of my primitive substitution (...) (24 years ago, 21-Sep-00, to lugnet.cad.dat.parts.primitives)
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| | Re: Possible replacement for 1-8sphe.dat
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(...) I think your both of your files are significant improvements over the existing primitives. My only concern is the possible impact changing the primitive could have on other files, where surfaces intersect spheres, but not at the edges of the (...) (24 years ago, 21-Sep-00, to lugnet.cad.dat.parts.primitives)
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| | Alternative possible hi-res sphere primitive [DAT]
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Please read my previous post regarding a possible replacement for 1-8sphe.dat. This post will make more sense if you do. Once I got my sphere tesselation algorithm to work, it was straightforward to generate a hi-res version of the sphere primitive. (...) (24 years ago, 21-Sep-00, to lugnet.cad.dat.parts.primitives)
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| | Possible replacement for 1-8sphe.dat [DAT]
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I started a discussion on the .dev group regarding sphere tesselation a little while back, and it came out that there is some dissatisfaction with the current sphere primitive. I have finished the code which generates a replacement sphere primitive, (...) (24 years ago, 21-Sep-00, to lugnet.cad.dat.parts.primitives)
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| | [lego/lcad] new primitive 1-8sphc.dat - 1/8 sphere cut off (aka rounded corner) [DAT]
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Doing this "job search" thing must be frying my brain. :-P Steve, I finally realized what you were saying, and that my file wasn't correct, so I've fixed the DAT file. Here's the fixed version. It's been re-centered and re-aligned. Please LMKWYT, (...) (24 years ago, 19-Sep-00, to lugnet.cad.dat.parts.primitives)
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| | 1-8sphc.dat "1/8 Sphere Cut Off" (i.e., "rounded corner") [DAT]
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Here's the new version of this unofficial primitive. (I've added the type-"5" lines.) Thanks, Franklin 0 1/8 Sphere Cut Off 0 0 COMMENT This figure is the intersection of 0 COMMENT a) one octant (1/8th) of a sphere 0 COMMENT whose radius is "the (...) (24 years ago, 16-Sep-00, to lugnet.cad.dat.parts.primitives)
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| | Re: unofficial new primitive -- "Rounded Corner" [DAT]
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(...) To be more specific: could this file be re-oriented, so that figures like (URL) can be constructed as: 1 1 0 1 0 1 0 0 0 1 0 0 0 1 1-4disc.dat 1 2 1 0 0 0 1 0 1 0 0 0 0 1 1-4disc.dat 1 4 0 0 1 1 0 0 0 0 1 0 1 0 1-4disc.dat 1 14 0 0 0 1 0 0 0 1 (...) (24 years ago, 15-Sep-00, to lugnet.cad.dat.parts.primitives)
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| | Re: unofficial new primitive -- "Rounded Corner"
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(...) Yup. (...) Go for it. :-) Also, if needed, please feel free to copy the image(s) for illustrating what this primitive is for. Franklin (24 years ago, 15-Sep-00, to lugnet.cad.dat.parts.primitives)
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| | Re: unofficial new primitive -- "Rounded Corner"
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I forgot to mention that I have another image (...) (24 years ago, 15-Sep-00, to lugnet.cad.dat.parts.primitives)
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| | Re: unofficial new primitive -- "Rounded Corner"
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Ooo, cool. That means each of the colored faces in your image is a 1-4disc.dat, right? That'll work very nicely. I'll forward this to the primitives committee. Do you mind if I use it in the skeleton leg file? Steve (...) (24 years ago, 15-Sep-00, to lugnet.cad.dat.parts.primitives)
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| | Re: unofficial new primitive -- "Rounded Corner"
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(...) UPDATE! It _is_ part of a sphere, I just realized, a sphere having a radius of "the square root of 2"! This primitive is one octant of that sphere with three faces "planed/smoothed off" so that the resulting object will fit inside a cube (...) (24 years ago, 15-Sep-00, to lugnet.cad.dat.parts.primitives)
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| | Re: unofficial new primitive -- "Rounded Corner"
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It is not part of a sphere. It can be thought of as a virtual cube which has had one corner sliced away in a curved fashion. Or to put it another way, it is the grey area in this image: "(URL) radii are "1", and its angles are 90 degrees (i.e., 1/4 (...) (24 years ago, 15-Sep-00, to lugnet.cad.dat.parts.primitives)
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| | Re: unofficial new primitive -- "Rounded Corner"
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[snipped Franklin's post] Some comments/questions: What is the definition of this part? Is it a section of a sphere? What are the angles and radii of the curved edges? Could you reverse the shape, so it is convex? This would make it easier to fit (...) (24 years ago, 15-Sep-00, to lugnet.cad.dat.parts.primitives)
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| | Re: unofficial new primitive -- "Rounded Corner"
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OK, I've finished this primitive, but before I re-submit it, I need to know a couple of things... Just what do I call the DAT file? On my PC's hard drive, I'm calling it "RND-CRNR.DAT". Is that food enough? Also, what extra steps (if any) do I need (...) (24 years ago, 15-Sep-00, to lugnet.cad.dat.parts.primitives, lugnet.cad.dev)
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