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Old 09-17-2012, 03:04 PM   #1
velarde
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Fernando Velarde
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Boolean Problem

Hello Everybody:

Hope someone can point me in the right direction to fix this.
I'm trying to model a coffee cup with lid and I'm having problem with the lid part.



Bigger version here

I created a revolve object as the main volume for the lid. And just wanted to carve away 2 holes with a boolean operation. But I'm not getting a good result. The Negative/hole part is a loft NURBS and the Main volume is a revolve object.

When I render I'm loosing the vertical walls. I created a simpler version with a cylinder to test my idea and it works ok there.

Any idea why I'm not getting the expected result?

Thanks in advance.
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Old 09-17-2012, 03:12 PM   #2
chi
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Patrick Goski
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Your cup lid is not a closed volume, while the cylinder is.

You would need to perform the boole on a closed volume.
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Old 09-17-2012, 03:31 PM   #3
velarde
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Quote:
Originally Posted by chi
Your cup lid is not a closed volume, while the cylinder is.

You would need to perform the boole on a closed volume.


Hello Patrick.

Thanks for the quick response. I believe it is closed. I have a bottom. Or am I misunderstanding what you mean?



Thanks!
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Old 09-17-2012, 04:11 PM   #4
Mike Abbott
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Just a wild guess - but could it be a reversed normals issue?
 
Old 09-17-2012, 04:23 PM   #5
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When you lathe / revolve the cap you should create an outline so that thickness is built into
the shape. Then, when you boole the cutout there will be thickness and solidity.

OR,

If you want the shelf opening, put the same texture on the boole object so it renders the inner profile.

Edit: Detailed lid
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Last edited by vid2k2 : 09-18-2012 at 03:59 PM.
 
Old 09-17-2012, 04:46 PM   #6
chi
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Couldn't tell from your angle
Post a file then..maybe people seeing the geo will be better than a single image.

I can't recreate your issue on my end when I try.
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Old 09-17-2012, 04:48 PM   #7
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Perhaps the end points on your profile for the cup are not perfectly aligned and set to 0 on the x or z. (which ever axes you are using)
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Old 09-17-2012, 05:11 PM   #8
velarde
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Thanks guys for all the quick ideas , I'll check the suggestions and see where the problem is.

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Old 09-17-2012, 05:11 PM   #9
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