Title: Help with Escher and perspective Post by: Devke on November 15, 2010, 03:22:04 PM I am creating some code to create an Escher like effect with perspective but I am a bit stuck, so I was hoping someone here would know. I figured out how to do the Droste effect with a basic 2x3 matrix transformation.
(http://i305.photobucket.com/albums/nn235/titanmedia/forum/transform-normal-steps.png) But now I want to add perspective as well using a 3x3 transformation with x and y divided by z (http://i305.photobucket.com/albums/nn235/titanmedia/forum/transform-perspective-steps.png) How do I determine the transformation that is needed in polar coordinates to align the end and the start of the next iteration? Title: Re: Help with Escher and perspective Post by: jehovajah on January 21, 2011, 06:31:37 AM I have not got a clue yet what you are on about but I am willing to help. Absolutely fascinating pics.
When you move to 3d you have more variations but since you are using matrices I guess you can explore each possibility. Also you may need to go to 4 x 4 matrices and pull out what you want as a special case as Hamilton did with quaternions. Get back to me with some general idea/ explanation of what it is you are playing around with. Title: Re: Help with Escher and perspective Post by: DarkBeam on February 09, 2011, 06:20:44 PM Marvellous stuff. What is the formula? :dink: |