I'm just wondering - is this a designed behaviour of PovRay, or is this 
some bug ?

I have model of simple "face" made from few spheres and spheresweep.

I have object that represent smile - objSmile. I'm using it to cut a hole 
in main head shape. But bounding box of objSmile becames bounding box of 
shape in with i'm cutting hole. Problem appears only when i use clipped_by, 
bounded_by itself works correctly.

I will post images to represent problem into .b.i in few minutes. 
Main code is :

union {
  difference { object{objSkull}  object{objSmile} }  
  object { objEyes }
  object { objNose }
  object { objHorns }
}

when objSmile contains :
    clipped_by { box {<-.6,-.5,-1.5> <+.6,.2,-0.7>} }
    bounded_by { clipped_by }

then also objSkull is clipped by same box, with is NOT intended by me.



-- 
#macro g(U,V)(.4*abs(sin(9*sqrt(pow(x-U,2)+pow(y-V,2))))*pow(1-min(1,(sqrt(
pow(x-U,2)+pow(y-V,2))*.3)),2)+.9)#end#macro p(c)#if(c>1)#local l=mod(c,100
);g(2*div(l,10)-8,2*mod(l,10)-8)*p(div(c,100))#else 1#end#end light_source{
y 2}sphere{z*20 9pigment{function{p(26252423)*p(36455644)*p(66656463)}}}//M

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In article <Xns### [at] 204213191226>, "Rafal 'Raf256' Maj"
<raf### [at] raf256com> wrote:

> I'm just wondering - is this a designed behaviour of PovRay, or is this
> some bug ?

Clipped_by is tricky, so make sure to read the documentation very carefully.

> I will post images to represent problem into .b.i in few minutes.
> Main code is :

Main part is not enough.  You should know that a minimal scene is required.

    Thorsten

____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde

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