Nyan Cat 1k by Aardbei [web]
Nyan Cat 1k by snq/aardbei Just in time for Aardbei's 13th birthday, here's an oldschool 1k intro! No hardware acceleration or shaders; instead you get sprites, 8 bit sound and a parallax starfield, pretty much like when we first got started. Seemed fitting. As it turns out, stuffing an animated cat into 1024 bytes isn't all that easy. They are known for being hard to generate using code... However, as it usually goes, things have ways of solving themselves, and finally I was absolutely stuck at 1025 bytes. I was about to remove a sprinkle or 2 or 3 in order to hopefully get better compression, but then I found some more usable space in the PE header, so after manually moving 2 pieces of data there, it was now 1019 bytes. It's not like anything magic is going to happen in 5 bytes so I used them for some user friendliness, namely a Sleep(1) in the main loop, and a bit lower audio volume. Still 1 byte left now, but I guess that's okay... The release version has been tested on Windows 7 x64 and Vista x86. It will not run on XP, amongst others because I use GetTickCount64 which XP doesn't have. Saved me 2 cdqs ;) The safe versions should run on XP though. It was made for a 16:10 aspect ratio, run the nowidescreen version for 4:3. Difference between the release and safe version are: - Window class name moved to PE header. - The only float const used in the intro is also stored in the header. - No window message checking. - Use GetTickCount64() to save me from having to cdq before dividing. In true oldschool fashion, the intro uses mostly int math, the fpu is only used to calculate the note frequencies, a total of 3 instructions (fild,fmul,fistp). - Rls doesn't use waveOutPrepareHeader, instead I just set the WHDR_PREPARED flag in the header. This seems to work fine on Vista and win 7 but not on XP. Apparently all this stuff together saved me 48 bytes. The more you know: - Nyan Cat himself consists of 6 sprites, the body/head, feet, and 4 tails, a total of 848 bytes of uncompressed data. - The sprinkles cost ~10 bytes compressed. - The softsynth is 74 bytes of uncompressed code, plus 4 bytes of float data, plus 48 bytes of notes (2 channels). - Adding volume envelopes made it sound a lot better so I decided to keep it even if it cost ~15 bytes compressed. - On top of the softsynth itself, another 71 bytes are needed to actually get the sound to your speakers. Fortunately that bit compressed reasonably well, ~38 bytes with wave headers and all. - The sample rate is 65536 Hz because that compressed better than 44100. - The intro was done in VC++ 2010, but the code consists of 100% inline asm ;) So there you go, enjoy! And happy birthday to us. Ja-rig lalala.
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