TITLE: rjetrump
NAME: Rolf Jentsch
COUNTRY: Germany
EMAIL: rolf.jentsch@online.de
TOPIC: Music
COPYRIGHT: I SUBMIT TO THE STANDARD RAYTRACING COMPETITION COPYRIGHT.
JPGFILE: rjetrump.jpg
ZIPFILE: rjetrump.zip
RENDERER USED: 
    povray 3.6 (unofficial port to linux-x86_64)

RENDER TIME: 
    1 hour 18 minutes 48 seconds

HARDWARE USED: 
    AMD Athlon(tm) 64 Processor 3000+, 512 MB memory


IMAGE DESCRIPTION: 

A trumpet floating in space and surrounded by many stars.
The "sound" of the trumpet is made visible with light emerging 
from the trumpet and a media-effect.

Music is sound, and sound itself is invisible. So the idea was to create an 
image where sound was substituted with light. That led to the concept of a
trumpet emitting a lightbeam.

The first idea was to place the trumpet in the upper pipe of a bigger
trumpet. The lightsources were placed into the lower pipe and the light
reflected through the hollow bow. 

The result of this design was quite "interesting", but produced nothing
that could be recognised simply by viewing at this picture.

Step two was to remove the outer trumpet, and add an additional lightsource.
That looked better, but without a background it was quite dull.

Step three was to fill the void with stars. The stars provide a nice
background, but do not distract from the main theme.

Finally the number and the size of the stars were adjusted, to create the
final image.


DESCRIPTION OF HOW THIS IMAGE WAS CREATED: 


The trumpet is build with povrays CSG. It is build from pipes and toruses a 
cone and a lathe. Due to the initial design it is mostly hollow.

The visible lightbeam ist another lathe object, with a media effect.

The C-program starfield.c generates a list of 2000 calls of the macro star
with random parameters.

The macro places the stars on a cylinder. The stars, that are not directly
visible are made bigger, so that more stars are reflected on
the surface of the trumpet.