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pix/anim/jup48ham.lha

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Short:HAM6 version of jup48ham8.anim7
Author: rknop at cco.caltech.edu
Uploader:rknop cco caltech edu
Type:pix/anim
Architecture:generic
Date:1994-02-14
Download:pix/anim/jup48ham.lha - View contents
Readme:pix/anim/jup48ham.readme
Downloads:227

JUP48HAM.ANIM7

This is the ham version of jup48ham8.anim7.  The animation is a 48 frame
320x200 HAM-6 animation, and as such should be accessible to any Amiga.  Using
ViewTek, I get >=60 frames/second on my A1200 w/40 MHz 68030 and 4 MB
32-bit fast RAM.  Because this animation has the two "looping frames" at the
end, you should use the CONT option or tooltype with ViewTek (if you in fact
use VT to view the animation).

In this animation, the point of view, or "camera," rotates in a Keplerian 
orbit around a ringed gas giant.  Throughout the orbit, the camera remains 
looking towards the center of the planet about which it orbits.  (Note that
there is nothing physically or astronomically correct about the rings; I just
made the "simple but looking kinda cool.")

The ray tracing package I used was the freely distributable POV-Ray 2.1 (which
is most definitely well worth the price!).  I built up one scene that had the
gas giant and its rings in the center, the star well behind the camera, and a
ILBM of stars image mapped onto the inside of a huge sphere around the whole
system.

Next, I wrote a short program in C which solved Kepler's equation for an 
inclined elliptical orbit of eccentricity 0.4 about the gas giant.  This 
program read in the template POV-Ray scene description I had read, and 
replaced the camera position and direction with values gleaned from the 
solving of Kepler's equation.  It wrote out 48 scene description files for 
POV-Ray, which I then rendered one by one.  (Though, here, I have to admit to 
cheating and using a Sparc station to do the heavy duty tracing, which
probably sped things up by an order of magnitude.)

Finally, I used ImageFX (awesome program) to produce the animation from the
individual frames.

-Rob Knop  (rknop@cco.caltech.edu)


Contents of pix/anim/jup48ham.lha
 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]               478585  776112  61.7% -lh5- 3a4c Feb  6  1994 jup48ham.anim7
[generic]                 1012    1913  52.9% -lh5- ef48 Feb  6  1994 jup48ham.readme
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         2 files  479597  778025  61.6%            Feb 14  1994
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