Forum archive

Ray tracing implicit surfaces with evaldraw

Return to forum index

• jnosof at 2008-12-10 22:05
  Hi Ken,
  I have posted to GameDev.net some screen shots of implicit surfaces raytraced with a script I'm developping under evaldraw.
  Here is an example. (meatball revisited  ;D)
  http://i395.photobucket.com/albums/pp36/jnosof/gloup.jpg
  Hope you will be pleased  ;D
  Cheers
  Edited by jnosof at 2008-12-11 06:37
• psychorosti at 2008-12-11 00:21

  Re: Ray tracing implicit surfaces with evaldraw

  Hi,
  
  you should post the link too :)
  
  It looks good. What do you intend when writing this in evaldraw or where do you want to go?
• Awesoken at 2008-12-11 03:03
  I am always 'pleased' to see my work being useful to someone other than myself.

  Perhaps 95% comparing to fully optimised C implementation :)).

  In terms of running speed, EVALDRAW is only comparable to C if you use pure floating point and no SSE instructions. C will win in most other cases.
• jnosof at 2008-12-11 05:54

  you should post the link too :)

  Oh, sorry I was distracted. Thanks
  
  

  I am always 'pleased' to see my work being useful to someone other than myself.

  Pleased seeing you pleased ;D
  
  Edit: My english is impossible. hope it's funny too!
  
  

  In terms of running speed, EVALDRAW is only comparable to C if you use pure floating point and no SSE instructions. C will win in most other cases.

  Excuse my ignorance. :o
  
  

  It looks good. What do you intend when writing this in evaldraw or where do you want to go?

  Well, first that's for fun.
  
  I found recently some articles about raytracing implicits on GPU and I wanted to see it running by own eyes. but I couldn't find runnable demo so I decided to do it myself.
  
  Why using evaldraw? that's obvious: you can get the result instantly. I wanted to do some experiment first before writing it as a shader for GPU.
  
  You can do incredible things with implicits. There is a wide range of possibilities for designers and artists thanks to CSG, Blending, space warps... etc.
  
  Last but not least, Raytracing (= high quality rendering) them at interactive rates is possible today using GPU. This opens new horizons to design and entertainment  (BTW I'm an architect so...)
  
  - That was really a good question ! thanks-
  Edited by jnosof at 2008-12-11 06:08
• jnosof at 2009-01-05 00:57
  Here is the script (partially cleaned and commented):
  IsoRayTrace
  
  Another screen shot:
  
  http://www.geocities.com/nait_merzouk_abdelaziz/architmahbil/prog/QJulia.JPG
  
  It can render correctly quaternion julia. Amazing.
  
  Edited by jnosof at 2009-01-05 00:59
• counting_pine at 2009-01-05 03:10
  Hey jnosof, thanks for the credit : )
  This looks like leagues ahead of anything I've tried... Glad my post inspired you though.