 | | Re: Ropes, Flex Tubes, Rubber Bands, et. al.
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Hi Shaun, I have written a program called lsynth, which does many bendable things like: flex-system hoses, pneumatic hoses, flexibe axles, ribbed hose, electric and fiber optic cables. The program is called LSynth and is available (URL) I'm also (...) (22 years ago, 30-Dec-02, to lugnet.cad, lugnet.cad.mlcad)
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| | Ropes, Flex Tubes, Rubber Bands, et. al.
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Hi All, I've been working diligently on LDrawing my Hudson 4-6-4 Steam Engine ((URL) and am finally running up against the seemingly impossible: Is there a way to modify pieces so that they bend and curve? So far, I've replaced bent flex-tubing with (...) (22 years ago, 30-Dec-02, to lugnet.cad, lugnet.cad.mlcad)
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| | Re: *** Start celebrating .... NOW
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(...) This sounds like a shortcut in the algorithm. If the bezier function is f(t), it does not have the property that |f(t) - f(t+d)| = c for all t, d given. I've corrected for this in my algorithm by using some simple optimization to find a (...) (22 years ago, 28-Dec-02, to lugnet.cad.mlcad)
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(...) Some progress - myself and a CAD expert mucked about a bit until we realised the obvious thing I was missing, the fact that the control point coordinates are specified relative to the end points and not in absolute coordinates! Jennifer (22 years ago, 28-Dec-02, to lugnet.cad.mlcad)
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(...) If memory serves me well, in Fredrik's Ldraw mode you specified the endpoints in terms of orientation as well as coordinates, stated the number of joints and it calculated the rest. Certainly a good system for many instances as that (...) (22 years ago, 27-Dec-02, to lugnet.cad.mlcad)
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(...) I think the most confusing aspect of the existing curve program, with the exception of Fredrik's, is the fact that the control points are tricky to position correctly. Fredriik's LDraw mode solves this by dynamically determining the control (...) (22 years ago, 27-Dec-02, to lugnet.cad.mlcad)
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(...) ldraw mode program to create flex hoses in the past with no problems, it's just this new way that is confusing me :-) Jennifer (22 years ago, 27-Dec-02, to lugnet.cad.mlcad)
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(...) If MLCAD uses Bézier curves to model the bent hoses, you may find some information on the internet about this technique: An interactive demo: (URL) is a more mathematical approach: (URL) may also like to see my own description of how I handle (...) (22 years ago, 25-Dec-02, to lugnet.cad.mlcad)
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Hi Michael, The hose generator is a superb contribution to your already excellent program. I dont't remember that I ever thanked you for your continuing effort, while I have been a user since 1.something, so... A big thanks and keep up the good (...) (22 years ago, 23-Dec-02, to lugnet.cad.mlcad)
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| | Re: *** Start celebrating .... NOW
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(...) Is there a doc anywhere describing how to use the MLCAD hose generator? I've been trying understand how all the points contribute to the curve but must be missing something obvious. Jennifer (22 years ago, 22-Dec-02, to lugnet.cad.mlcad)
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