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Vue F.A.Q (Last Updated: 2024 Dec 30 8:14 pm)



Subject: Boolean Trees


bhitney ( ) posted Thu, 26 July 2001 at 6:37 AM ยท edited Thu, 09 January 2025 at 8:34 PM

Anyone have any luck performing boolean operations on trees? -Brian


tesign ( ) posted Thu, 26 July 2001 at 8:14 AM

Love to use one of those "Lumber Jack" chainsaw...let me at it! };->


SAMS3D ( ) posted Thu, 26 July 2001 at 8:38 AM

Tesign, I haven't tried that, must try that tonight. Do you Boolean one tree with another tree or with primative? Sharen:) PS: have you tried it?


Varian ( ) posted Thu, 26 July 2001 at 10:53 AM

Well Brian, the answer is yes and no - lol. Yes it's possible to use Boolean operations on the trees, but it's very unpredictable as to what results you may get. I first tried this when I was creating a window scene, with a tree outside the window. To get the tree looking right, many of its leaves were hanging to the inside of the "house", coming through the wall and ceiling. So, thought I, I'll just Boolean substract those stray leaves from the rest. I performed the operation using a cube, and the leaves remained but the tree trunk vanished! =:o What I ended up doing was "squishing" the tree so that it could retain its height, but no leaves were pushing through the wall any longer. Booleans on SolidGrowth is like Booleans on terrains -- very unpredictable. You may or may not get what you're seeking. :)


Crescent ( ) posted Fri, 27 July 2001 at 12:13 PM

Sounds like the normals are facing the wrong way. This may sound goofy - okay, it is goofy - but try Boolean Intersection or Boolean Union. In Rhino, if one object has the normals going the wrong way, you get strange results with Booleans. Before I figured out how to change the direction of the normals, I discovered that sometimes a different Boolean operation would give me the results I wanted - if not the ones I expected. See if this works. I'm kinda curious if I'm right. :-)


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