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Index › Programming Questions & Help › Syntax Questions › optimization request: same color, unique alphas
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optimization request: same color, unique alphas (Read 1568 times)
jtarbell
optimization request: same color, unique alphas
Apr 25th, 2005, 2:01am  
If I have a color in 0xRRGGBB format, and I'd like to place pixels with this color each with a different alpha value, I'm currently doing something like this:

// places red pixel with random alpha
color myc = 0xFF0000;
stroke(red(myc),green(myc),blue(myc),random(255));
point(10,10);


Seems like there should be a better way of doing this?    The way I've got it here seems awkward.

Thanks,
jared


Similar to this thread, but not exactly:  http://processing.org/discourse/yabb_beta/YaBB.cgi?board=Syntax;action=display;num=1114289131
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fry
Re: optimization request: same color, unique alpha
Reply #1 - Apr 25th, 2005, 2:30am  
this would be faster:

int alpha = random(256); // non-inclusive of the 256 itself
set(10, 10, (alpha << 24) | myc);
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jtarbell
Re: optimization request: same color, unique alpha
Reply #2 - Apr 25th, 2005, 7:29am  
Thank you Ben, this is exactly what I was looking for.

jared
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