conical anamorphosis

Replies to This Discussion

Permalink Reply by Daniel Piker on March 4, 2014 at 10:13am

Place the original image below the cone,

take a line from the viewing point to each point of this image,

intersect these lines with the surface,

rotate each line 180° about the surface normal at the intersection point,

intersect the rotated line with the XY plane to get the transformed point.

No need to write any equations, and the nice thing about doing it this way is it is then trivial to use a different viewing point, or a different shaped mirror or image surface.

Permalink Reply by paulcoudamy on March 4, 2014 at 10:56am

Thank you Daniel,

have you any idea to do it with Brep and/or Surfaces in order to see the undeformaed image in the miror ?

Paul

Permalink Reply by Daniel Piker on March 4, 2014 at 11:46am

As a check/to see the undeformed reflection, just render it with a reflective material:

This definition works with surfaces - to use a Brep you'll have to explode it first

Attachments:

• anamorphosis.gh, 11 KB

Permalink Reply by paulcoudamy on March 5, 2014 at 2:02am

I'd like to do it with a volume.

for exemple to deforme a 3D shoe in order to get the underformed image of the shoe in the mirror when you look above the cone.

It sound tricky but it seems to be possible with morph tools.

Permalink Reply by paulcoudamy on March 5, 2014 at 3:53am

look at this system but on a cone : http://www.ufunk.net/artistes/jonty-hurwitz-anamorphose/

Permalink Reply by Daniel Piker on March 6, 2014 at 6:14am

Here's the same thing for a 3d mesh:

Just rotate the ray 180° around the normal, that's all there is to it.

Attachments:

• anamorphosis3d.gh, 45 KB

Permalink Reply by paulcoudamy on March 6, 2014 at 9:17am

Thanks a lot Daniel,

I work the deformation in a full 360° circle.

I'll have to find a solution to delete the central faces which appear on the middle of the cone and link the end of the mesh.

Permalink Reply by taz on March 6, 2014 at 4:32pm

Pimp!