I’d made a very simple web app which mimics a Game Boy Camera using the camera from your phone or desktop, and it got picked up by people so much that I’m amazed my web host is still holding. The surprise I had last Monday when I saw my Twitter notifications is maybe only second to the feeling I had when I was invited to become a Hackaday contributor. In an age when there are more megapixels stuffed in the sensor of a smartphone camera than the average computer display can even represent, why would jagged images from a 20-year-old grayscale camera with pixels numbering in the thousands still grab attention? Maybe what’s old is new again, and the coolness factor of novelty is something that can’t be quantified. Never underestimate the power of nostalgia. What are the most interesting designs can you create in a simple formula? Posted in Misc Hacks Tagged bit math, computer graphics, html5, javascript, math, pixel art Now our original formula from the top will draw a black box for every ninth number except that the bitwise XOR throws a wrench into that count, varying how often a number divisible by 9 appears and supplying the complexity necessary for these awesome patterns. When dividing 9 by 5, 5 goes in once with a remainder of 4 so 9 % 5 = 4. This operator divides two numbers and returns the remainder if any. Moving onto the %, which is the Modulo operator has nothing to do with percentages. From this truth table, we can see the most-significant digits are both 1, returning a 0, while only one of the least-significant digits is a 1, so the comparison returns a 1. Converted to binary we have 0b11 and 0b10.
The XOR returns a 1 when only one of the two digits is a 1, otherwise, it returns a zero for that position. Bitwise XOR compares each binary digit of the two inputs.
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