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Old 2nd Nov 2016, 11:27 AM   #1
Melechesh
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Default LightWave - subpatch modeling, problem with edges and circular shape

hi all,
i'm trying to learn supatch modeling...
as you can see in the first image i've create an object, then in subpatch i can see the shape of circle almost "perfect"

but when i add edges for make some "panels" the circled shape become "deformed".... as shown in the second image... in the red circles...

can you help me? i would keep the form of the orange circle, and the shape of circle of the first image ...
i would keep use subpatch
sorry for my eng
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Old 3rd Nov 2016, 07:05 AM   #2
Rigel
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It's because you added extra edges running the length of the tube. That sharpens the edges running the length which results in flattening the sides.

Get rid of those edges so it goes back to being round.

Now, using Bandsaw, run edges along the loop where I put the red arrow. Make sure you add an extra edge on both sides of that loop. The closer they are to the original edge, the sharper the result will be.

Next, do the same with the other loops I marked in red.

If that doesn't quite do it, remove those edges and try adding edges to the loops I marked in green.

However, there are some situations where sub-patch modelling won't produce the results you need. Sometimes you just have to freeze the mesh, clean it up (reduce the polygons) and create the additional detail in polygon mode.

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Old 3rd Nov 2016, 08:23 AM   #3
Melechesh
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ok, thanks for reply! i'm working..!
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Old 3rd Nov 2016, 11:13 AM   #4
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Rigel is exactly correct Melechesh. You can take a look at my SubPatch Modeling Tutorial (Nudity Warning) - http://www.foundation3d.com/forums/s...ead.php?t=3445

In it I discuss edge loops and hardening of edges. Subpatches in Lightwave work along a calculated curve based on a series of points along an edge. If the points are evenly spaced the curve that is calculated is more circular. If some points are closer together they create a sharper curve and so deform the entire shape.
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SubPatch Modeling Tutorial (Nudity Warning)
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Old 3rd Nov 2016, 02:16 PM   #5
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I tried to recreate your object myself. Here's what I ended up with.



How did I get this?

First of all, I started with a tube with 8 sides rather than 6. Then I stencilled in the vertical lines to create the indents.

Before I actually made the indents, I used the knife tool to create a single cut across the upper faces where I wanted the top of the indent to be.

Then I used multi-shift to make the indents.

When I applied sub-patching, there was a slight squashing where I made the cut for the tops of the indents. To fix this:

a) turn off sub-patch
b) go to point mode and select all of the points along that cut
c) switch to polygon mode and turn on sub-patching
d) switch to point mode; the points will still be selected
e) use the stretch tool (make sure your mode is set to Selection rather than Mouse) and spread the points until the tube looks round again.

Then use Bandsaw to add your extra edges. This is what I ended up with.



To help illustrate where I applied extra edges, I coloured them orange.

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