Hi,
I wrote a glsl quaternion julia fractal program based on the cg shader by Keenan Crane (http://graphics.cs.uiuc.edu/svn/kcrane/web/project_qjulia.html). I ported the code to glsl and modified it a bit.
You need the shader model 3.0. If you decrease epsilon or max step size too much, the program can crash, because the instruction size can exceed 64k. I will solve it using multipass texturing. But for now, it’s for test purposes, only.
You can use the program as written below:
The hot keys work only, if the fractal image is focused with the mouse.
left mouse click: rotation of the fractal
ctrl+left mouse click: zoom
alt+left mouse click: movement of the fractal
Shift+left mouse click: rotation of the light relative to the eye’s position
Shift+Ctrl+left mouse click: move the light from or to the rotation center
Shift+Alt+left mouse click: movement of the light source
l/L: cx
i/I: cy
j/J: cz
k/K: cw
“space”: toggle animation on/off
+/-: iterations
e/E: Epsilon
s: shadow
m/M: maximum step size
The colors can be changed by Fractal->color settings.
A video will be produced shortly.
Here is the link: Julia 3D and here the code: http://www.lichtundliebe.info/projects/3DFractal.zip.
Best,
Andreas
