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Old 20th December 2013, 11:52 AM   #1
shortstan
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Talking Cylinder against Sphere

Been trying to make a fuselage thats round and have probably over 6 hours now trying to get the surface nice with out all the rough surface. Have tried everything and still nothing works. BUT if i down load a prim made into a COLLADA file from Inworldz its perfect. So I decided to try a sphere and make it into a cylinder with a little work and see what it looks like. Well it looks good and is better than the cylinder created in AC3D. Also I notice that triangulate works good the first time you use it but if you divide it the triangles go bad and mess the original ones up when it tries to insert the new ones.

Glad I'm retired and got alllllllllllll this free time to play with this software. Now I just need to finish one project. SMILES
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Old 20th December 2013, 05:55 PM   #2
shortstan
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Default Re: Cylinder against Sphere

Here are some photos. First one is just a clyinder and the second is a complete fuselage. There's a difference between them. Sphere to fuselage is about 4 hours work making a cylinder out of a sphere.
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Old 20th December 2013, 10:29 PM   #3
jentron
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Default Re: Cylinder against Sphere

Extrude edges and subdivision are your friends for doing something like this.

But how did you get the cool fade background?

Ron
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Old 20th December 2013, 10:37 PM   #4
jentron
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Default Re: Cylinder against Sphere

First a 12 sided cylinder, in vertex mode select one circle
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Old 20th December 2013, 10:39 PM   #5
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Default Re: Cylinder against Sphere

Extrude the edges, pull the new vertexes forward and shrink them:
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Old 20th December 2013, 10:40 PM   #6
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Default Re: Cylinder against Sphere

Repeat a couple more times. To close, extrude one more time, don't move the edges forward, just snap the vertexes together and weld.
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Old 20th December 2013, 10:41 PM   #7
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Default Re: Cylinder against Sphere

Apply a couple of clicks of subdivision: I'll attach the demo file so you can look at what I did...
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Last edited by jentron; 20th December 2013 at 10:46 PM.
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Old 21st December 2013, 11:12 AM   #8
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Default Re: Cylinder against Sphere

You've caught me on a quiet day, so I'll continue on...

I noticed your fuselage has a hemispherical nose and the one I sketched is more bullet shaped. This is a technique I use when I want to more exactly match a circle or other defined shape.

Step 1, create a new reference shape exactly where you want it on the more complex shape. I could have loaded a background image into the left view but in this case I simply created a circle (use the control key when creating it to keep it round not oval) and moved it to the correct place, then sized it, again with the control key to keep it round.

Step 2, drag the formers on the fuselage back to line up with the vertexes of the circle. Note that I "locked" the circle so I don't accidentally edit it.
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Old 21st December 2013, 11:20 AM   #9
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Default Re: Cylinder against Sphere

Step 3, switch to a view where you can see the front(back in the picture) and side. Using the control key to keep the section round, and working in the front view while watching the side view, drag the section's corner size to match the guide.

Step 4, I kept the tip disk small and nearly flat because triangles do not subdivide like quads and if this disk is large and cone shaped the algorithm will introduce some jagged edges.

Step 5, turn the subdivisions back on and admire your handy-work.

Ron
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Old 21st December 2013, 03:55 PM   #10
Andy
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Default Re: Cylinder against Sphere

A very nice illustrated tutorial !
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