SharkD nous illumina en ce 2008-12-11 00:16 -->
> "clipka" <nomail@nomail> wrote:
>> If the mesh is open I'd expect whacky results from CSG operations. For example,
>> if you intersect an open mesh and a solid object, the resulting object will
>> *not* behave like a "cut-out" piece of the mesh; instead, I'd expect certain
>> parts of the other object's surface to be visible as well, namely all those
>> areas where a ray, when shot along the inside vector, would enter through a
>> "hole" into the inside of the mesh. (This is just a guess, but be prepared to
>> get something like this or similar.)
> 
> My mesh is completely flat. If anything lying above the mesh upward until
> infinity is considered "inside", that's OK.
> 
> Also, where do I put the "inside_vector" statement? Inside the triangle, or
> inside the mesh?
> 
> -Mike
> 
> 
A completely flat, 2D mesh will probably don't work in a CSG intersection or 
difference.

In you difference that mesh from a solid, you will remove zero volume, an 
infinitely thin sheet from whatever other objet you may have.
If you difference a solid from your mesh, it will cut a hole in it.

In the case of an intersection, there will be no volume left, and you'll get an 
empty object, or maybe, just a piece of plane.

You can always use that mesh in an union or merge without any problem.



-- 
Alain
-------------------------------------------------
You know you've been raytracing too long when you read each of these quotes.
Mike Weber

Post a reply to this message