Raytracer
Abstract
Raytracing is a technique which generates a three dimensional picture
from a textual description of the spacial arrangement of different kinds
of figures. The textual presentations describes the spacial ordering of
the figures, the number and placement of light sources, as well as the
view point of the observer.
The program calculates each pixel by following the path of the light
starting from the eye of the observer. Each figure which intersects the
beam is considered in its reflection behaviour. Each figure has an individually
definable surface with its own colour, texture, and reflection.
The Raytracer is implemented in Oberon-2 and is extensible. One may
introduce arbitrary additional figures. A new figure has to supply two
procedures. One which calculates the resulting direction of the light beam
after a reflection, and second a procedure which returns the beams hit
position within the figures texture.
An example
SOURCE DEFINITION |
CALCULATED PICTURE |
World.Define
- World.Title "Example1.Bmp"
- World.LookAt <0.0 0.0 50.0>
- World.Observer <0.0 -500.0 170.0>
- World.ViewUp <0.0 0.0 1.0>
- World.Eye 57.0
- World.View 150 150
- World.Background (0.0 0.0 0.3)
- World.Ambient (0.2 0.2 0.2);
- World.Lamp <200.0 -400.0 200.0> (1.0 1.0 1.0) 8000.0
- World.Surface "Metall"
- World.Sphere <0.0 -50.0 120.0> 120.0
- World.Surface "Oberon"
- World.Polygon
- <220.0 220.0 0.0>
- <-220.0 220.0 0.0>
- <-220.0 -220.0 0.0>
- <220.0 -220.0 0.0> ~
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Contact
Programmer: Klaus Mittmannsgruber
Email: klaus.mittmannsgruber@jk.uni-linz.ac.at
Supervisor: Dipl.-Ing. Markus A. Hof
Email: hof@ssw.uni-linz.ac.at
Download
Documentation and sources are available via ftp.
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