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Index › Programming Questions & Help › Syntax Questions › what means "maskColor >> 16 & 0xFF&
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what means "maskColor >> 16 & 0xFF& (Read 548 times)
mobic
what means "maskColor >> 16 & 0xFF&
Aug 30th, 2007, 4:48pm  
hello,

what means

int maskColor = = 0xFF000000;
dist(maskColor >> 16 & 0xFF, maskColor >> 8 & 0xFF, maskColor & 0xFF,
     this.pixels[i] >> 16 & 0xFF, this.pixels[i] >> 8 & 0xFF, this.pixels[i] & 0xFF);

i know the distance-thing and i know that it find out a color-distance of a pixel to another color. but what means that >>?

thanks
mo
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seltar
Re: what means "maskColor >> 16 & 0
Reply #1 - Aug 30th, 2007, 5:25pm  
the >> is for shifting a value..
A color is really an int in disguise, and to store all those values in one int, they use shifting.
It's basically like writing hex with numbers, and shoving it in to an int.

I think the maskColor >> 16 & 0xFF does the same as the function red(maskColor).. there are also functions for green, blue, and alpha..

Hope this helps!

seltar
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Ira
Re: what means "maskColor >> 16 & 0
Reply #2 - Sep 1st, 2007, 4:09pm  
mobic,
This is covered in detail in the Math reference of Appendix B in Processing:Creative Coding and Computational Art.

Ira
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