EMAIL:osvo@aristia.cz
NAME:Ondrej Svoboda
TOPIC:Physics & Math
COPYRIGHT:I SUBMIT TO THE STANDARD RAYTRACING COMPETITION COPYRIGHT.
TITLE:Erathostenes sieve
COUNTRY:Czech Republic
WEBPAGE:http://www.geocities.com/Paris/LeftBank/5572
RENDERER USED:POV-RAY 3.01 for Win95
TOOLS USED:Win95 TT font Copperplate Gothic Bold, Graphic Workshop version 1.1x for JPEG conversion
RENDER TIME:18h50min02sec
HARDWARE USED:IBM PC 330, Pentium 166, 32MB RAM
IMAGE DESCRIPTION:
My picture is visualisation of Erathostenes sieve. It is a algorithm for calculating of prime numbers.
DESCRIPTION OF HOW THIS IMAGE WAS CREATED:
First i have created both planes. Then i have declared all boxes and balls. I have after them built 
the sieve and placed balls. Last time i added the stone bar with numbers. At the start  i have declared 
the sieve as a union of boxes, later was union replaced with merge keyword. The render time is with 
this operation dramaticaly larger (from 30 min to 19h). I thought that the merge should take out all internal 
bounds, but (you can see it) i am not sure that POV-Ray interpret the adjacent areas right. I can be wrong, 
it is my first attempt to participiate in IRTC and i work with this software only 1 month.

P.S. Sorry if the term sieve is not right for the description of this Erathostens algorithm, i have very 
small dictionary and my English is not good.