 |
Author |
Topic: voxels - raymarching demo (Read 1663 times) |
|
toxi
|
voxels - raymarching demo
« on: Sep 12th, 2003, 7:21pm » |
|
below is in addition to my post about my volumetric renderer in this thread.
i just found it more suitable to start a new one instead of hijacking one... 
oki, so i've spent the afternoon cleaning up the code and you can download the sketch folder from here:
http://www.toxi.co.uk/p5/voxels/volumeRenderInt.zip
be warned, it's a 4.3MB file! this is due the size of the data set, which is uncompressed 16MB and is an MRI scan of a human foot...
the code is heavily commented, but in short the controls are:
click and drag mouse to rotate the view
keys - and + are used to zoom in/out
keys 1-9 to change the contrast
the rendering is done progressively, so just wait a moment before the image is rendered in full res. depending on your machine speed, this might take >10 seconds
please feel free to add lighting etc. i'd love to see what people do with it!
some screengrabbed videos are here:
http://www.toxi.co.uk/p5/voxels/foot.avi
http://www.toxi.co.uk/p5/voxels/noise.avi
|
http://toxi.co.uk/
|
|
|
Glen Murphy
|
Re: voxels - raymarching demo
« Reply #1 on: Sep 13th, 2003, 4:27am » |
|
Neat!
The lighting/shading in mine was just a simple loop over the voxel array starting from the top. Each voxel got its lightness based on the opacity and lightness of the voxel at x-1, y-1. In order to cheaply simulate light diffusing through the scene I just added a tiny amount of light at each step, so that in very transparent voxels, the ray of shade would get brighter again.
|
| « Last Edit: Sep 13th, 2003, 4:29am by Glen Murphy » |
|
|
|
|
|
