> Hmmm, then it is very strange because the values my script outputs are 
> bad...  because my OpenGL program reads them in the 
> What-You-Have-Is-What-You-See.
> 
> The problem is probably where the script writes to the disk...

I narrowed the problem and it is around my trace call...


I trace a ray from <X,2,Y> to <X,-2,Y>  and any hit gets written to the 
disk.

Now I checked if the hits I get have the same x and z values as my trace 
line, and about 99% of them dont.

I checked for those that have inconsistent XZ values if the vector was 
<0,0,0> and many of them are not...

So, with my current code as I understand it, the ray is diverted in 
another direction somehow...

Now that I eliminate every inconsistent trace returns (such as <0,0,0> 
and vector.x != X, etc...)  I get only two good surface hit on my 
object...  The two of them are on X = 0 and Z = 0;

Here is my updated code... can someone help me find where the problem is?

BTW, I'm sorry to switch Y for Z, I'll clarify that in future posts...

#macro TraceRay(X, Y)

#if(!defined( myFile))
   #error "Could not open temp.pov-stdout.txt"
#end
#write(myFile,  "  Y ", str(Y,5,2), "    ")

#declare StartRay = <X,2,Y>;
#declare SurfaceTouch = StartRay;
#while(StartRay.y > -1)
   #if(StartRay.x != X | StartRay.z != Y)
     #error "Inconsistent XY"
   #end

   #declare SurfaceTouch = trace(MyObject, StartRay, <X, -2, Y>);

   #if(SurfaceTouch.x = X & SurfaceTouch.z = Y)
     #write(myFile str(SurfaceTouch.y, 0,3), " ")
     // Good!
   #else
     #if(SurfaceTouch.x = 0 & SurfaceTouch.y = 0 & SurfaceTouch.z = 0)
       #debug "Got no hit at all!\n"
     #else
       #debug concat("\nGot hit with inconsistent XZ values: ", 
str(SurfaceTouch.x-X, 0, 10), "\n")
     #end

     // There was no hit, stop tracing...
     #declare SurfaceTouch = <X,-2,Y>;
   #end
   #declare StartRay = SurfaceTouch;
#end

#write(myFile "E\n")



#end



-- 
Dedicated to audio/visual and interactive artwork.
Author of The Primary Colors of CSound:
http://www.geocities.com/simonlemieux/PCCS/index.html

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