 | | Wierd shading in LDView
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I was updating part 3847 to use the 1-4con0 primitve and I notice some wierd shading at the tip. I then open the 1-4con0 primitive directly and there were no shading problems I could see. Download 3847 at the Parts Tracker to see what I mean. (URL) (...) (22 years ago, 24-Jan-03, to lugnet.cad.dev)
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| | Re: Tangent between two circles in 3D space?
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(...) What you really need is to find a way to find just one side of the "rubber band". Say, pulley A to pulley B, "Side one". Then you could use the same function to determine pulley B to C, side one or two, and so on... Right? Paul (22 years ago, 24-Jan-03, to lugnet.cad.dev)
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| | Re: New LDraw.org Books Page
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(...) Cool--talking w/the author. Seen some of yourp osts miguel--i'm familiar with your owrk as well. My 3 star rating was not meant to be bad--i actually have no problems with the book. it is meant ot reflect how useful i find the book. Thats why (...) (22 years ago, 23-Jan-03, to lugnet.cad, lugnet.cad.dev.org.ldraw)
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| | Re: New LDraw.org Books Page
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(...) Hi Lan, Thank you very much for the review. I would also like to hear opinions from experienced users. However, I don't think the book has been out more than a month and I do expect more reviews of this kind to come up in the next few weeks. (...) (22 years ago, 23-Jan-03, to lugnet.cad, lugnet.cad.dev.org.ldraw)
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| | Re: New LDraw.org Books Page
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(...) Hi- I've gotten a copy of this book and posted a review on Amazon. It is a good book for newbies and experienced lego cad modelers will appreciate having all this info in onep lace. I'd be interested to hear anyone elses thoughts on it--esp (...) (22 years ago, 23-Jan-03, to lugnet.cad, lugnet.cad.dev.org.ldraw)
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| | Re: Tangent between two circles in 3D space?
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Kevin, I have been watching this thread with great interest and it is really fun to watch the community pitch in and assist you. Would you do me a favor. When you finally have the solution, could you summarize in a post? I plan on using this as a (...) (22 years ago, 23-Jan-03, to lugnet.cad.dev)
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| | Re: lsynthcp community development project setup on sourceforge
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(...) I couldn't find it anywhere in this thread, so the project page is here: (URL) on the Browse CVS link near the bottom to view the source code. The homepage is here: (URL) just to test things out a bit, I logged into the sourceforge compile (...) (22 years ago, 23-Jan-03, to lugnet.cad.dev, lugnet.cad.dev.mac)
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| | Re: Tangent between two circles in 3D space?
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(...) This looks great! This is what I was trying say the other day during my ah,hah! moment, but not so tersely. Now I just need to know how to calculate the intersection of the line and each circle and I'll be all set I think. I'll do some (...) (22 years ago, 22-Jan-03, to lugnet.cad.dev)
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| | Re: Tangent between two circles in 3D space?
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"Kevin Clague" <kevin_clague@yahoo.com> skrev i meddelandet news:H92o0p.CGB@lugnet.com... (...) a (...) Line = Intersect(C1.Plane, C2.Plane) if (Dist(C1.Center, Line) = C1.Radius) and (Dist(C2.Center, Line) = C2.Radius) ... (Or have I (...) (22 years ago, 21-Jan-03, to lugnet.cad.dev)
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| | Re: lsynthcp community development project setup on sourceforge
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Agreed! -- Steven B. Combs, Publisher Bricks in my Pocket (BimP) (URL) Submission Information: (URL) member #414 "Kevin Clague" <kevin_clague@yahoo.com> wrote in message news:H92o80.D83@lugnet.com... (...) question! (...) (22 years ago, 21-Jan-03, to lugnet.cad.dev)
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| | Re: Tangent between two circles in 3D space?
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(...) More or less... there are 4 tangents to the 2 cylinders that happen to be on the circles. (...) Some thoughts that could perhaps (with [lots of] work) lead to an iterative solution: - Select one of the circles, then choose one radius of this (...) (22 years ago, 22-Jan-03, to lugnet.cad.dev)
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| | Re: Tangent between two circles in 3D space?
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(...) Yes. This *is* the ultimate (and probably universal) solution, although we probably need to be able to find one of four cylinders between any two circles in 3D space. You are thinking in terms of pulleys always on the outside of the band. With (...) (22 years ago, 22-Jan-03, to lugnet.cad.dev)
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| | Re: Tangent between two circles in 3D space?
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Hi Kevin, I think common tangent to circles is too restrictive, since rubber belts tolerate quite a lot of misalignment. ((URL) the problem should be reformulated as: Two circles in 3D space define two cylinders orthogonnally extruded from them. (...) (22 years ago, 22-Jan-03, to lugnet.cad.dev)
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| | Re: Seam width
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(...) Please see (URL) (22 years ago, 22-Jan-03, to lugnet.cad.dev)
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| | Re: Seam width
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(...) In LDView, I do a few things. First, I check to see if the file I just loaded is a part. In order to be a part, it has to satisfy two criteria. First, it can't be the child of a part. Second, it has to either be in the LDraw Parts directory, (...) (22 years ago, 22-Jan-03, to lugnet.cad.dev)
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| | Re: LDraw Infotip Shell Extension DLL
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(...) parts directories, researching parts stuff... :) (...) This version is very nice, just as it is. :) But if you were to figure out to make LDraw files display rendered images in Explorer's "thumbnail" view, that would be awesome... Steve (22 years ago, 22-Jan-03, to lugnet.cad, lugnet.cad.dev)
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| | Re: Tangent between two circles in 3D space?
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(...) Well, I'll start 8?) Step 6 - thats radius Step 7 - should be sin T = L / R ROSCO (22 years ago, 22-Jan-03, to lugnet.cad.dev)
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| | Re: Tangent between two circles in 3D space?
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(...) OK. Here's my rather convoluted analysis: 1. Find the plane of pulley A 2. Find the plane of pulley B 3. If they dont intersect, no tangent so stop here 4. Find the angle between them, call it T 5. Find the normal to plane A that passes (...) (22 years ago, 22-Jan-03, to lugnet.cad.dev)
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| | Re: Tangent between two circles in 3D space?
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I have a child in fourth grade, and like many his age, he is a natural born lawyer looking for loopholes, so 'm well versed in the tactic because it is hard to resist.... If you notice my original post, I didn't even mention pulleys, I just asked (...) (22 years ago, 21-Jan-03, to lugnet.cad.dev)
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| | Re: Tangent between two circles in 3D space?
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(...) Ah Ha! Apparently there were TWO other pulleys you weren't telling us about. (URL) (22 years ago, 21-Jan-03, to lugnet.cad.dev)
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