Alain <ele### [at] netscapenet> wrote:
> sirhenjo nous apporta ses lumieres en ce 2007/11/16 03:11:
> > "Zeger Knaepen" <zeg### [at] povplacecom> wrote:
> >> "sirhenjo" <sir### [at] hotmailcom> wrote in message
> >> news:web.473cafc7fcd9bf9af721d5e80@news.povray.org...
> >>> Okay, thank you all. It seems that POV-Ray is indeed capable of doing it.
> >>> However, to make it really viable for me, I need some more functionality.
> >>> During
> >>> the raycasting I want to make some extra checks.
> >>>
> >>> For example, I have multiple objects in front of eachother with some space
> >>> between them. Instead of writing a depth map of the scene, letting rays
> >>> end
> >>> whenever they hit any object, I may want to write the depth values of an
> >>> complete second object.
> >>>
> >>> To achieve this I may need to let the ray keep till it hits the 3rd face,
> >>> ignoring the first 2 faces.
> >>>
> >>> Is this possible at all?
> >> uhm, just remove the blocking object?
> >>
> >> I don't get it :)
> >>
> >> cu!
> >> --
> >> #macro G(b,e)b+(e-b)*C/50#end#macro _(b,e,k,l)#local C=0;#while(C<50)
> >> sphere{G(b,e)+3*z.1pigment{rgb G(k,l)}finish{ambient 1}}#local C=C+1;
> >> #end#end _(y-x,y,x,x+y)_(y,-x-y,x+y,y)_(-x-y,-y,y,y+z)_(-y,y,y+z,x+y)
> >> _(0x+y.5+y/2x)_(0x-y.5+y/2x)            // ZK http://www.povplace.com
> >
> >
> > Heheh, should have said "without removing the blocking object".
> > It may seem like something silly to do, but I have my reasons for this question.
> >
> >
> Is it that you wand to see the object in the back trough that in the front?
>
> --
> Alain
> -------------------------------------------------
> You know you have been raytracing for too long when the animation you render
> will be finished after yourself.
> Urs Holzer

What I want to to write several depth levels to one particular texture, using
the RGBa channels for 4 different depth levels.

I want to store 4 depth levels at 0% 33% 66% and 100% to one texture. Removing
objects in the front won't help me for complex scenes.

Some basic algorithm I need during the raycasting is a counter of intersected
faces and the distance between them.
Can I add some logic/algorithm to the raycasting?

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