"Josh" <nomail@nomail> wrote:

> 1) I would love to use the example from Inigo Quilez about rounding. Say I have
> a simple function for a box used in an isosurface. How would I implement his
> idea in povray to make the corners round? I tried changing the threshold of the
> isosurface, but that doesn't do it. A simple example would be super helpful.

http://www.iquilezles.org/www/articles/distfunctions2d/distfunctions2d.htm

float sdBox( in vec2 p, in vec2 b )
{
    vec2 d = abs(p)-b;
    return length(max(d,0.0)) + min(max(d.x,d.y),0.0);
}

It may take some fiddling to get the vectors that ShaderToy allows you to use in
its functions into a POV-Ray function.
#declare PX = VecP.x;
And then you can use PX in the function.

> 2) I also like how you can create df3 files and use them as a function from the
> warp example. Is there any 3d modelers that can export df3? Are there other
> programs/ways to create simple df3 files of simple shapes?

There should be a function to make a df3 from POV-Ray.
http://wiki.povray.org/content/Reference:Arrays.inc

Arrays.incReference
This file contains macros for manipulating arrays.

ARRAYS_WriteDF3(Array, FileName, BitDepth): Write an array to a df3 file.

Parameters:

Array = The array that contains the data.
FileName = The name of the file to be written.
BitDepth = The size of the binary word.
Note: See the #write directive for more information.



I would have gotten to this sooner, and maybe wrote out some more detailed help,
but I spent all day writing and developing Arduino code in cpp proper.
I still have one or two things to do that I don't quite understand.   ;)


But this should get you going if you play with it a bit.


https://www.desmos.com/calculator

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