Logo by mclarekin - Contribute your own Logo!

END OF AN ERA, FRACTALFORUMS.COM IS CONTINUED ON FRACTALFORUMS.ORG

it was a great time but no longer maintainable by c.Kleinhuis contact him for any data retrieval,
thanks and see you perhaps in 10 years again

this forum will stay online for reference
News: Visit us on facebook
 
*
Welcome, Guest. Please login or register. February 04, 2023, 04:08:46 AM


Login with username, password and session length


The All New FractalForums is now in Public Beta Testing! Visit FractalForums.org and check it out!


Pages: [1]   Go Down
  Print  
Share this topic on DiggShare this topic on FacebookShare this topic on GoogleShare this topic on RedditShare this topic on StumbleUponShare this topic on Twitter
Author Topic: Suggestions for a renderer to explore a 3D density function (voxels)  (Read 1028 times)
0 Members and 1 Guest are viewing this topic.
snickell
Forums Newbie
*
Posts: 1


« on: May 28, 2016, 05:08:11 AM »

I have a dense 3D IFS that I'd like to explore. It produces a "density" at each point in 3D, essentially opacity voxels.

Here's a really poor 3D rendering using a program designed for 3d medical data (cat scans, etc):
https://dl.dropboxusercontent.com/u/5048927/3d-ifs-osirix-render.png

Here's a movie where the 3rd dimension is mapped to time (panning through one rendering):
https://dl.dropboxusercontent.com/u/5048927/3d-ifs.mp4

I was wondering if somebody could suggest a renderer program/framework for getting a good rendering of this done, to start to understand the properties of this space. I've currently implemented the IFS's density(x,y,z) function in both python and GLSL, but I don't know enough about 3d rendering to write my own raymarcher in GLSL. Ideally I'd really like to explore the IFS in semi-realtime using a GPU rendering, but high quality is important as an option.

I'd be happy outputting 3D data in any sane file format for which a suitable high quality renderer was available.

-Seth

Logged
phtolo
Navigator
*****
Posts: 79



« Reply #1 on: May 28, 2016, 09:06:55 PM »

Fragmentarium would be my suggestion.
I don't know of any programs that lets you explore transparent objects of the bat, instead you could try the following:

Look at Examples - Tutorials - 26 3D fractals without a DE.frag
You need to add a slider for what opacity level and change the bool inside(vec3 pos) function to your density function with a check of the opacity-level.
Logged
Patryk Kizny
Global Moderator
Fractal Fertilizer
******
Posts: 372



kizny
WWW
« Reply #2 on: July 09, 2016, 09:23:01 AM »

What voxel format you currently output to?
If you're on openVDB, you could try using industry VFX tools - like houdini. It has a free apprentice version these days.

If you can save to ASCII pointcloud (XYZ + RGBABC) where ABC are arbitrary properties (color, density, reflectance etc…) the best renderer for that would be Krakatoa.
You can run it as a standalone or plugin to majority of 3D software out there. Krakatoa handles easily massive datasets. I was rendering about 1 000 000 000 points dataset at a regular workstation.
Logged

Visual Artist, Director & Cinematographer specialized in emerging imaging techniques.
3dickulus
Global Moderator
Fractal Senior
******
Posts: 1558



WWW
« Reply #3 on: July 09, 2016, 09:55:38 AM »

http://www.fractalforums.com/fragmentarium/generating-wave-front-obj-files-from-exr-voxel-cube/

just now tinkering with a renderer/converter that takes an EXR slice stack and outputs a .obj (wavefront) file or .pcd (point cloud data) file
Logged

Resistance is fertile...
You will be illuminated!

                            #B^] https://en.wikibooks.org/wiki/Fractals/fragmentarium
Pages: [1]   Go Down
  Print  
 
Jump to:  

Related Topics
Subject Started by Replies Views Last post
Mandelbulb voxel representation @ 2000^3 voxels Mandelbulb Renderings twinbee 3 2349 Last post November 28, 2009, 11:56:27 PM
by twinbee
Point cloud and voxels system - real time unlimited detail General Discussion o0megaZer0o 3 7537 Last post March 01, 2011, 09:23:06 PM
by o0megaZer0o
How to Explore other peoples projects? Mandelbulb 3d Pangaea 7 2327 Last post March 01, 2012, 05:01:21 PM
by Alef
Explore Film Arthur Stammet 0 868 Last post May 04, 2013, 10:46:19 PM
by Arthur Stammet
The best way to explore a Fragmentarium hybrid... Animations Showcase (Rate My short Animation) « 1 2 » 3dickulus 18 2302 Last post August 17, 2013, 10:44:08 PM
by 3dickulus

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines

Valid XHTML 1.0! Valid CSS! Dilber MC Theme by HarzeM
Page created in 0.158 seconds with 24 queries. (Pretty URLs adds 0.006s, 2q)