Oleguer Vilella nous apporta ses lumieres en ce 2005-07-31 08:32:
> Hi all,
> 
> I've done this object:
> ======================================
> merge{
>     sphere { <0, 0, 0>, 1
>       translate -0.5*x
>     }
>     sphere { <0, 0, 0>, 0.5
>       translate 0.5*x
>     scale <1.5, 0, 0>
>     }
>     pigment { rgbf <0.9, 0.9, 0.9, 1> }
>     rotate <0, 0, 0>
> translate <0, 0, 0>
> scale 5
> 
> clipped_by { plane { z, 0 }
> 
> }}
> ======================================
> And I want to cut it, to do it I used a "clipped_by" with a plane, but I 
> think I'm wrong.
> 
> I want to cut the object and then I want to put objects inside. So, I want 
> to have it "empty". I don't know if the method that I'm using will work 
> properly.
> 
> All helps will be welcome.
> 
> Regards,
> Oleguer 
> 
> 
As it is, it "looks" empty, if you put some rotation to the whole object, after the
clipped_by. 
Removing the filter and using interior_texture shows that clearly, but it have NO
thickness.
What I'd do is this:
difference{
	merge{sphere{0,1 translate -0.5*x}//0,1 = <0,0,0>,1
		sphere{0,0.5 translate 0.5*x scale<1.5,1,1>}//get rid of warning about scaling by 0
		}//exterior part
	sphere{0,0.9 translate -0.5*x}//change the 0.9 and 0.4 to set the thickness of the
side
	sphere{0,0.4 translate 0.5*x scale<1.5,1,1>}//iner "hollow"
	box{<-2,2,0>,<2,-2,-2>}//cut away unneded part
	pigment{rgbt 1}// no surface colour
	interior{ior 1.5 //glass, optionaly add some dispersion, but very subtle effect
		fade_color rgb 0.9//make the material coloured in it's mass
		fade_distance 0.1//adjust to your taste
		fade_power 1001//use exponential fading
		}
	}

Alain

Post a reply to this message