Proboolean Subtraction and Union Issue

[Anonymous]

Hi again everyone,

Wouldn't be posting again if I could help it, but it seems I've hit another snag, this time regarding proboolean.

I know it can be clunky and touchy at times, but when it works it is beautiful.

My problems are as follows;

I am trying to punch a window shape through a 3D wall using 'move' and 'subtraction' in proboolean. Problem is, when I click on the window object, both that and the main model disappears. It will not make a hole like I need.

Before this, (before I cut the mesh) it simply said the boolean was 'invalid' and to check for self-intersections, whatever that means. I can't find out how to check for those, is there a way?

Any solutions for getting my window to make a hole? Both objects can be seen in the first image.

Intersections are my issue with the proboolean 'union' tool too. I plan to use my model to 3d print, but I have multiple objects intersecting each other at the moment. When I try and 'union' two boxes however, with one half way inside the other, union will cut off the intersections and merge the objects, thus making them hollow. This is the desired effect.

However, when I try the same with an arch molding and the arch itself on the main mesh, both disappear. This can be seen in the second image. What is the best way to remove intersections with models?

Hopefully these issues aren't too vague, but if anyone needs further details let me know.

Thanks again,,

Ash

[Anonymous]

Sometimes probolean has an error ,

sometimes bolean better than probolean..

Ok. I have the workflow for your model..

try this tutorial for your isues

please visit our website and subscribe our youtube channel, there're a lot tutorials

check this videos for your isues

goodluck !!!!

[don_3259]

hi ashbriers i think for making you can try polgon modeling method by making addition segments on that area then shape the hole moving vertex then delete that polygon face but i not understand your other issue more please tell me that you can using same polygon method to do all things that is best method.

thank you 

[leeminardi]

The short answer may be to push the window opening shape through the wall so that it clearly comes through the opposite side. It is always a good idea to avoid making the two shapes of a Boolean subtract operation have a coplanar condition.  

The long answer. The mathematical theory of Boolean operations for creating solid models is basically a two stage process.  The first step is to determine the shape of the resulting Boolean operation whether the operation is union, subtraction, or intersection. The second stage is to determine if there are results of the operation that form an invalid solid object.  This second stage is referred to a regularization.    For example, consider a box with a cylinder passing through it in such a way that the bottom of the cylinder is flush with the bottom of the box.  A Boolean subtract  of the cylinder from the box without regularization would yield a box with a hole almost all the way through it.  There would be a surface of infinitesimal thickness where the flat bottom of the cylinder was flush with the box.  Regularization would remove the infinitesimal thick surface.

3ds Max usually addresses the need to do regularization but sometimes it fails.  A good strategy to evade this potential problem is to avoid having the planar surfaces of two objects coplanar when doing a Boolean subtract. 

Of course, this may not be the problem with your geometry.

[Anonymous]

I have exactly same problem as AshBriers.

If i do subtraction from the wheel gear, i got a union. 

but if I subtraction from the box beside, it running good. 

it's really tricky. 

 

[leeminardi]

Can you post the file and clearly state your objective?

Lee