The Mary Queen of Scots Channel Anamorphosis: A 3D Simulation

30 warrenm 8 8/13/2025, 1:26:34 PM charlespetzold.com ↗

Comments (8)

bee_rider · 24m ago
Now that he’s got it in a computer, it might be interesting to ask questions like: what’s the geometry that has the sharpest transition, while also preserving some sort of “good view” of the two subjects from a lot of viewing angles. I think this is not even a good phrasing of the problem yet, but phrasing the problem well is part of the fun.

I guess this could be interestingly image-dependent. In particular she’s quite pale, so I wonder how many surfaces could be shared between the two images.

dole · 1h ago
Thought the name seemed familiar; he wrote a number of the early MS .NET 2000's era of C#, VB.Net and other Microsoft Press books. Warms the heart to see an industry mentor bang out goofy stuff for curiosity and fun.
becurious · 1h ago
He wrote Programming Windows 3.1 which was the classic reference for Windows programming in the 90s and just known as ‘Petzold’. All Win16 and C. The managed languages are much later.
kitd · 1h ago
> The artist is unknown but the date of composition is given as 1580, which is several years before Mary was executed, so the transformation into a skull seems a little premature.

Mary Queen of Scots was imprisoned by the English for about 19 years before her execution and was pretty unpopular in Scotland during that period. So it is entirely possible that her morphing into a skull was intentional.

rebuilder · 54m ago
It seems hard to believe it was not intentional!
kitd · 44m ago
Yes, wrong word. I meant it accurately reflected sentiment at the time.
brookst · 1h ago
Interesting and fun read, but I kept waiting for it to come back to logarithms. Seems there might be something there in the prisms?
SiempreViernes · 1h ago
Neat!