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PureData allowed this experiment to be taken into the 3-D realm (XYZ).
Instead of each shape growing smaller inside itself, each shape is created consecutively farther from the viewer. From one angle it can give the illusion that the shapes are growing smaller. But this illusion is destroyed when the viewer's camera is moved.
To input a shape you must enter the XYZ coordinates of the shapes corners. If you wish the shape to remain flat, then make all of the Z coordinates zero.
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Here is the orginal patch. You will need to download PureData Extended, its free!
myTri.pd and triControl.pd (basic instructions within files)
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After thinking about different shapes that I could input, I decided to create a random shape creator. Its default is a 20 sided shape (called a Icosagon), yet its coodinates are randomized not only in the X and Y, but also its Z coordinates! So the results can be quite strange.
myTri.pd and triControl.pd (basic instructions within files)
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Now for some of the results I have created:
If your interested, here is some of the orginal beta-testing files