Leonardo Zide wrote: > I've put together a quick test of what I'd like to do with > flexible pieces, if you're interested take a look at <http://gerf.org/ > ~leo/leocad-hose.zip> (but don't use that version for anything else, > it's really unstable and buggy). > Downloading it while writing this. > The idea is to be able to add a flexible piece, select its control > points, move them and preview it in real time. I have no idea how > LSynth works but I guess it would be a good idea to be compatible > with it. > > I'm undecided about what kind of features/curves work better. I'm > thinking about forcing the curves to pass through all control points > and adding small arrows that let the user control the tangent at that > point. I believe this is what most programs do, so it must be what > users prefer. > > Right now I'm using a simple cubic bezier but it doesn't give > users a lot of control over the shape of the curve so it will need to > be changed. > I personally prefer Catmull-Rom splines for ease-of-use. Splines that also have tension and bias are indeed nice to give the user more control. But in a 3D environment i find them to be very hard to use. In that case i much rather go with a basic cardinal spline function and add more points to it to adjust the overall shape. > Leonardo > > > On May 29, 2007, at 1:10 PM, Oliver Salzburg wrote: > > >> Philo wrote: >> >>> Hello Oliver, >>> >>> >>>> i started to build the model 8421 in LeoCAD and i'm wondering how >>>> will get all the flexible parts in there? >>>> >>> As of today, you have no other solution than adding the flexible >>> parts >>> outside LeoCAD. Lsynth (http://kclague.net/LSynth/index.htm) is the >>> tool of choice for that, see also this tutorial: >>> http://www.holly-wood.it/lsynth/tutorial-en.html >>> >> I will look into that, thanks a lot. >> >>> You will have to save your work in LDraw format to use that (do it in >>> the end) >>> >>> See here http://philohome.com/pwheel/pwheel.htm what can be done with >>> LeoCAD+Lsynth+LPub! >>> >>> >> I looked at your page earlier today and at that page in particular. >> Nice >> work :) >> >>>> Any suggestions are welcome. >>>> Further i have difficulty aligning parts correctly. The built in >>>> snapping seems to be helpful, but very often parts just >>>> end up at the wrong position. Then i turn snapping off and move >>>> parts >>>> around which then end up in better positions >>>> but still have to be moved over the Modify panel. All in all a >>>> sometimes frustrating process. >>>> Especially when small alignment errors add up to a total of like >>>> 5mm. >>>> An even bigger problem is when rotation is involved. >>>> >>> Did you have a look to these tutorials about grids and angle grids >>> (http://trac.gerf.org/leocad/wiki/LeoCadDoc)? >>> >>> >> I did not. But i just gave them a quick look and will inspect them >> further tomorrow. Thanks again. >> >>> Cheers, >>> >>> Philo >>> >>> >> PS: My current progress: >> >> http://www.ibw.nl/alien/legovgay.png >> http://www.gkmotu.com/temp/stuff.jpg >> >> Two friends of mine are regularly trying the model out on the >> render of >> their choice :) >> _______________________________________________ >> Leocad mailing list >> [email protected] >> https://list.gerf.org/listinfo/leocad >> >> > > > ______________________________________________________________________ > This email has been scanned by the MessageLabs Email Security System. > For more information please visit http://www.messagelabs.com/email > ______________________________________________________________________ > > _______________________________________________ > Leocad mailing list > [email protected] > https://list.gerf.org/listinfo/leocad > >
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