Comments on: Integrating Flint particles with the Pushbutton Engine http://blog.makeyourflashgame.com/375/integrating-flint-particles-with-the-pushbutton-engine.html where creative people can create flash games together... Thu, 02 Sep 2010 05:07:18 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: syndrome http://blog.makeyourflashgame.com/375/integrating-flint-particles-with-the-pushbutton-engine.html/comment-page-1#comment-102 syndrome Fri, 30 Apr 2010 19:03:13 +0000 http://blog.makeyourflashgame.com/?p=375#comment-102 instead of nextColor = (Math.random()*0xff)*0x010000+ (Math.random()*0xff)*0x000100+ (Math.random()*0xff)*0x000001; you should use nextColor = (uint(Math.random()*0xff) << 16) | (uint(Math.random()*0xff) << 8) | uint(Math.random()*0xff; bitwise operations are waaay faster also, Math.random() returns Number, not uint, so if you get nextColor = (0.223885652*0xff)*0x010000+ (0.887276236*0xff)*0x000100+ (0.123859423*0xff)*0x000001; it will evaluate to 3741505.37281536 + 57921.39268608 + 31.584152865 = 3799458.349654305 which is then casted to uint 3799458 = 0x39F9A2 this is incorrect, because the random RGB color values should equal to 0x39, 0xE2, and 0x1F, respectively (totalling 0x39E21F). yeah, I'm always like that :) thanks for the tut. instead of

nextColor =
(Math.random()*0xff)*0×010000+
(Math.random()*0xff)*0×000100+
(Math.random()*0xff)*0×000001;

you should use

nextColor = (uint(Math.random()*0xff) << 16) | (uint(Math.random()*0xff) << 8) | uint(Math.random()*0xff;

bitwise operations are waaay faster
also, Math.random() returns Number, not uint, so if you get

nextColor =
(0.223885652*0xff)*0×010000+
(0.887276236*0xff)*0×000100+
(0.123859423*0xff)*0×000001;

it will evaluate to
3741505.37281536 + 57921.39268608 + 31.584152865 = 3799458.349654305

which is then casted to uint
3799458 = 0x39F9A2

this is incorrect, because the random RGB color values should equal to 0×39, 0xE2, and 0x1F, respectively (totalling 0x39E21F).

yeah, I'm always like that :)
thanks for the tut.

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