Re: 3d transform

Hi Erik,

> Does anyone have experience in doing 3d transforms in LispWorks?

I wrote some code for doing 3D transformations a couple of years ago.
I'd be happy to make that open source, but I'd need to spend an hour
or two to isolate the code from the project it is a part of.

> I'm looking for a way of transforming an image in the same way as the
> CSS rotateY does (an example is here:
> http://desandro.github.io/3dtransforms/examples/transforms-01-functions.html)
>
> It seems like the transforms available in CAPI/GP can only handle affine
> transformations, which means that parallel lines in the source will stay
> parallel in the target image. So an external library of some sort would
> probably be needed.

I think that affine 3D transformations are powerful enough to implement the
rotateY from your example.  But the problem with CAPI's transforms is that
they are 2D, not 3D.

Arthur

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