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[15:29:39] <justinfrontThink> Does anyone know if getBounds code has been broken since release of recent NME?
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[16:41:15] <Caribou|> I'm trying to make a blinking effect playing with alphas, i tried to do something elegant with Actuate but i haven't succeeded, what would be a good way to do that without using timers and adding methods !? :/
[16:41:56] <Caribou|> well you'll have to user timers in some manner but i'd like it to be elegant
[16:45:19] <justinfrontThink> you can use a sine wave or several
[16:47:14] <justinfrontThink> http://code.google.com/p/nekonme/issues/detail?id=268   I have added an issue with width/height
[16:47:59] <justinfrontThink> I think timers would be lighter that Actuate for a repeat.
[16:48:05] <justinfrontThink> than
[16:52:21] <Caribou|> the thing is that i don't need easing, and making the easing time to 0 makes things a bit tricky, i'll stick with timer then thanks :]
[16:57:04] <justinfrontThink> http://www.mathworks.co.uk/products/matlab/examples.html?file=/products/demos/shipping/matlab/xfourier.html
[16:59:03] <Caribou|> interesting
[16:59:48] <justinfrontThink> so something like y = Math.sin(t) + Math.sin(3*t)/3 + Mat.sin(5*t)/5 + Math.sin(7*t)/7; if( y > 0.9 ) y = 1; if( y < -0.9 ) y = -1;
[17:00:27] <justinfrontThink> no.... er.... y = Math.sin(t) + Math.sin(3*t)/3 + Mat.sin(5*t)/5; if( y > 0.9 ) y = 1; if( y < -0.9 ) y = -1;
[17:02:12] <justinfrontThink> you don't need more than one or two sines that will give you some smoothing. If you want different on off times then it's more complex and maybe simplier to use one timer to start another toggling between.
[17:38:45] <justinfrontThink> What you can do is sort of stick equations together.  For instance a cosine starts at 1, Math.PI later it is at -1. So we can move the sine wave up so it's between 0 and 1 by halving it magnitude and adding a half.  Then we can construct an if statement that leaves a gap between turning on and off something like... tOff = 500; tOn = 200;
[17:38:47] <justinfrontThink> if( t++ < 180 ){ mc.alpha = 0.5*Math.cos( Math.PI*(t/180) ) + 0.5; }else if( t > tOff + 180 + 180 ){ t= -tOff; } else if( t > tOff + 180 ){ mc.alpha =  0.5*Math.cos( Math.PI*( (t-( tOff + 180)) /180) ) + 0.5; }
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[18:08:43] <Caribou|> woah i like your mathematical approach but i'm not sure it would be more clear than just a timer + a switch to make it on & off
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[18:17:11] <justinfrontThink> depends if you want a smooth on and off
[18:18:38] <justinfrontThink> sine is easy one to use as it feels natural, but you can slip in a tween equation in a piecewise construction, you don't have to use them with tween engines you can use the equations similar to above.
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[18:47:33] <Caribou|> yes you are right but i actually wanted to avoid smoothing in that very case
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[23:33:08] <lordkryss> anyone using flixel or haxepunk?
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   October 6, 2012  
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