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hey, im trying to recreate my bike frame in 3d, its the first thing ive tried to make without following a tutorial http://www.talkgraphics.com/images/smilies/smile.gif, i have no idea how to go about making the welds where the tubes meet (i mean mean making the illusion of the metal welds from real life, not welding vertices) please help somebody? thanks...http://members.aol.com/stnkyfnga/bike.jpg
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hey, im trying to recreate my bike frame in 3d, its the first thing ive tried to make without following a tutorial http://www.talkgraphics.com/images/smilies/smile.gif, i have no idea how to go about making the welds where the tubes meet (i mean mean making the illusion of the metal welds from real life, not welding vertices) please help somebody? thanks...http://members.aol.com/stnkyfnga/bike.jpg
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I really don't know why you chose the name 'stinkyfinger' in a slang version <sigh>, but that's your problem. I just wonder about the society in highly developed and so called civilized countries going down the gutter.
Usually a bike frame features thicker tubes at the joints, so the beams will be inserted into the joints and then welded. However, with today's laser technology many manufacturers - at least in Europe - don't use this type of 'connection muff' anymore. The beams will be lasered to the joints as the following pic shows: blending surfaces (if your application offers this feature).
Is this what you have in mind?
jens g.r. benthien
designer
http://www.sacalobra.de
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If you don't know how to dream you'll never be a designer.
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well i really dont know much about the way bicycles are made, i was just trying to make it it look fairly like it does in real life. i used a tape measure and calliper to measure the dimensions and a picture of the bike in the perspective veiwport to roughly get the angles down. it is by no means exact. here is a picture of the actual frame from the manufactures website and also a picture of the way the weld looks at the joints, thanks for the help though...
http://members.aol.com/stnkyfnga/rv.jpg
http://members.aol.com/stnkyfnga/weld.jpg
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to achieve this effect you need to pick the last isoparm of the tube and let an ellipse flow along the isoparm. Then add a texture and it'll have the look you want.
However, I don't know if your app does have the feature to pick isoparms - this is a feature of 'heavy duty' CAD software.
pic 01: extract the isoparm
pic 02: flow an ellipse around the isoparm
pic 03: shaded view in openGL
jens g.r. benthien
designer
http://www.sacalobra.de
----------//--
If you don't know how to dream you'll never be a designer.
----------//--
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thanks that looks good, i just have to find out if i have that feature... im using 3ds max 3.1. thanks for your help
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Another way is I take the tube and cut straight through the sucker and then once more for the join,then you scale out the polys or points in the new section http://www.talkgraphics.com/images/smilies/smile.gif
Is that Rhino jens?
Stu.
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yup, this is Rhino.
Your approach for C4D is great, but it lacks the curvature of the welding part. In Rhino you can modify the ellipse until you achieve the 'bulge' you need ;-}
jens g.r. benthien
designer
http://www.sacalobra.de
----------//--
If you don't know how to dream you'll never be a designer.
----------//--
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Hmmm ok one cut then and agressive use of a hyper nurb http://www.talkgraphics.com/images/smilies/biggrin.gif
Rhino does do a nice easy job of that frame join though I have to admit http://www.talkgraphics.com/images/smilies/smile.gif
Stu.
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geez, just had an idea (as if my brain would be fallen asleep the rest of my life ;-} )
construct two pipes in C4D. One vertical - let's say 10 units diameter, and a horizontal poking into it with a diameter of 8 units.
Now make a boolean horizontal minus vertical - the vertical will remain in the object hierachie, but deactivated.
Now select the horizontal, enable polygon mode, select the poly edges at the cutting end and detach/duplicate them. Create a small ellipse, rotate it let's say 20 degrees to - 20, and sweep it along your detached spline.
Does it work? I didn't test it, because I just returned home from an offroad trip with my 2.8 ton truck ;-}
Thumbs up,
jens
jens g.r. benthien
designer
http://www.sacalobra.de
----------//--
If you don't know how to dream you'll never be a designer.
----------//--
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I've been totally wrong. Just tried it and after a few minutes surrendered -}
This is the way for C4D:
create tubes as above, add a circle direction yz, diameter 8 units, project circle to yz plane and you will have a circle that follows the curvature of the vertical pipe or tube
create a small circle with 1 unit diameter, sweep it along the projected circle.
see pic below and check your mail - I've sent the c4d file to you.
jens
jens g.r. benthien
designer
http://www.sacalobra.de
----------//--
If you don't know how to dream you'll never be a designer.
----------//--
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or you could always start out with a cube and pop things out... the thing with box modeling this way is that you will have loops for selection purposes etc, as well upon several smoothes/divides you will have enough mesh to play around with going for modeled bead here... I have not gone that far here but you can see how it started...and the loops around the weld area... from there you would simply tweak your bead/puddle shapes and or even select this weld region, assign different color then do a map for the weld...
just another box model moment... http://www.talkgraphics.com/images/smilies/biggrin.gif
nice bike btw... what method?
[This message was edited by gidgit on April 26, 2003 at 21:08.]
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we are getting there http://www.talkgraphics.com/images/smilies/biggrin.gif
this was boxed out from the cube, but I blew the math, cutting for the back arms while not cutting and connecting all the way around.... and thus didn't get the loops needed where the bars join the front, though the ones near the seat pipe are ok and have been scaled to reflect a slight weld... also went past twenty moves after the third smooth and thus only have a higher density mesh, to fine to bother trying any further tweaks... ugggg... if'n it isn't one thing it's the other...lol... oh well...
box modeling is very cool for what is possible with relative ease... though I suppose that it really does fit with concept and organic modeling more than anything else http://www.talkgraphics.com/images/smilies/smile.gif
[This message was edited by gidgit on April 27, 2003 at 00:57.]
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great stuff, however your model will be better suited for polycarbonate than steel ;-}
jens g.r. benthien
designer
http://www.sacalobra.de
----------//--
If you don't know how to dream you'll never be a designer.
----------//--
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haha, thanx Jens... uh yea, I tell you, had I not blown the math then the pipes where they come into the front piece, would have/should have looked like they do where connected to the seat stem area... welded like rather than outa shape from smoothes... but yea, I see totaly with what you mean Jens... even up by the seat area it is deformed and I was too lazy to reshape and resize those areas http://www.talkgraphics.com/images/smilies/biggrin.gif...
I think that in more capable box modeling hands than myself, this bike could be box modeled within an hour tops... c/w welds the way they could be... but alas... twenty undo's just wasn't enough for me http://www.talkgraphics.com/images/smilies/biggrin.gif http://www.talkgraphics.com/images/smilies/biggrin.gif
There's a reminder folks... take the time and save your worx along the way in the various stages between divides... Durn http://www.talkgraphics.com/images/smilies/biggrin.gif
I like SF's original frame here, looks very real... still wondering how it was built... primitives, deformers and assembly to group?
Come on SF... how did ya do it? What was your method? Curious minds wish to know http://www.talkgraphics.com/images/smilies/biggrin.gif
[This message was edited by gidgit on April 27, 2003 at 10:02.]
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haha, I figured out why the part by the seat turned out and the front of the pipes srpead as they did... I extruded from the seat area one segment then bridged to the front... should have extruded one segment on the front as well then when bridged al;l turns out ok... follow that all ? http://www.talkgraphics.com/images/smilies/biggrin.gif good, as this little move makes quite a bit of difference when joining things together in this fashion... http://www.talkgraphics.com/images/smilies/smile.gif
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thanks for the comment http://www.talkgraphics.com/images/smilies/smile.gif, all i did was measure everything on my bike and then put in the same measurments with tubes and cylinder primitives, exept for the chain and seat stays. those are cv curves lofted with a circle. then i converted everthing to editable mesh, then i think i made copies of almost everything and did the boolean intersect option, cause everytime i did it with the original peices they disapeared :/