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Hello, I just finished a first implementation for creating flexable axes and i'm quickly posting it before i go home for the weekend. It's my second program ever and my first object oriented one (so don't expect too much :-) ). If someone wants to (...) (24 years ago, 4-Nov-00, to lugnet.cad.dev)
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| | Re: bend thingie creator.
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well I was a little bit to eager to post it, there still seem to be a few problems with the rotation matrix. I will post it again later when I hope all bugs will be removed. koen (24 years ago, 6-Nov-00, to lugnet.cad.dev)
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| | Re: bend thingie creator.
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(...) This sounds very interesting, I look forward to seeing it! Steve (24 years ago, 6-Nov-00, to lugnet.cad.dev)
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| | Re: bend thingie creator. retry
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Ok , I think I have exterminated the problems with my rotationmatrix and I have rezipped it and again put it online at (URL) also an example jpg now. Please test it and let me know if it gives some strange twists or if it crashes or something like (...) (24 years ago, 7-Nov-00, to lugnet.cad.dev)
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| | Re: bend thingie creator.
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Wow! This thing is incredible. This program doesn't just turn a bunch of subparts, it actually creates the axle out of triangles. The output is beautiful! It was missing the edgelines, though. Any chance you could add support for electric wires? (...) (24 years ago, 21-Nov-00, to lugnet.cad.dev)
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| | Re: bend thingie creator.
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I'm very happy to get such a good reaction. Edgelines are coming later on because this requires some big changes, now i draw the axle and place cilinders over it, so edgelines would be crossing, this isn't good so I will have to change this method. (...) (24 years ago, 22-Nov-00, to lugnet.cad.dev)
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| | Re: bend thingie creator.
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(...) It's very cool indeed, I've been trying to do something like this for LeoCAD but I'm using Hermite curves and the user is able to move the control points and direction vectors interactively. Everything works reasonably well but I'm having (...) (24 years ago, 24-Nov-00, to lugnet.cad.dev)
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| | Re: bend thingie creator.
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(...) I'm using a simplified form of bezier curves, like you see in most drawing software like coreldraw etc.. this is also x = f(t), y = g(t) and z = h(t) with f, g and h being a*t^3 + b*t^2 +c*t + d . a, b , c and d can than simply be calculated (...) (24 years ago, 26-Nov-00, to lugnet.cad.dev)
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| | Re: bend thingie creator.
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(...) I've thought about using bezier curves but I decided to choose another type of curve because it doesn't allow you to make the curve pass by a specific point (except the first and last points). (...) I'm using a different solution: I start with (...) (24 years ago, 26-Nov-00, to lugnet.cad.dev)
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| | Re: bend thingie creator.
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(...) Doesn't this complicate things a lot? It is possible easily draw a hundred beziercurves that make up 1 curve, but how do you make 1 equation that passes through a hundred points? (...) mean (...) segment (...) it (...) with (...) segment in (...) (24 years ago, 26-Nov-00, to lugnet.cad.dev)
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| | Re: bend thingie creator.
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(...) Sorry, I explained myself poorly, I divide the curve in segments with only 2 points each. Bezier and Hermite curves are very similar, but I don't use Bezier curves because the control points are not very user-friendly, I'd rather have tangents (...) (24 years ago, 27-Nov-00, to lugnet.cad.dev)
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| | Re: bend thingie creator.
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I've now used the upvector and your rotation matrix. Makes things a lot simpler. Thanks a lot for the tips. koen (24 years ago, 8-Dec-00, to lugnet.cad.dev)
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| | Re: bend thingie creator.
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(...) Koen, I tried to email you using your address, and I tried to download your bendie thingy creator. It is gone. Does anyone have a copy of this so I can play with it? Kevin (18 years ago, 24-Nov-06, to lugnet.cad.dev)
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(...) Let me check my archive of LDraw related programs and if I have it I'll email it to you. -Orion (18 years ago, 24-Nov-06, to lugnet.cad.dev)
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