Subject: Re: [stella] Meltdown programming tricks From: Thomas Jentzsch <tjentzsch@xxxxxx> Date: Wed, 25 Aug 2004 20:56:12 +0200 |
Ok, I think I understand the trick now. Actually it is quite simple: The size is usually set to two copies wide, and during displaying the player the size is set to double size. Timing is critical, since you must chance the size exactly at the start of the copy being displayed. If you are too early, the copy won't show at all, if you are too late, the first pixel(s) will still have single size. I have experimented a bit and you can also use quad size or three copies here. But since the timing has to be pixel perfect and the CPU clock runs at 1/3rd of the pixel clock the timing for either the 2nd or 3rd copy can't be perfect. I think this trick maybe be useful. E.g. scaled player graphics, with 64 pixel (2x2 player, double sized). Maybe even more copies are possible with some tweaking, but that won't be easy. Have fun! Thomas _______________________________________________________ Thomas Jentzsch | *** Every bit is sacred ! *** tjentzsch at web dot de |
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