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sparticle_0_3_5

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a very simple particle system implementation using pixel brightness from a photograph to determine point size, as the particles move (fall) on the screen their x and y coordinates are mapped to the image and the size changes accordingly. modified daniel shiffman's simple particle system i simplified it a lot so that i could figure out what was going on. i added some boid functionality to it as well, i can't remember where i found it exactly, but i believe it was in the forums, i modified it a little bit as well.
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