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Index › Programming Questions & Help › Syntax Questions › What is ALPHA How does it work
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What is ALPHA ? How does it work ? (Read 595 times)
alphachapmtl
What is ALPHA ? How does it work ?
Oct 16th, 2006, 5:17am  
What is ALPHA ? How does it work ?

I use instructions like the following,
and changing alpha's value gives me weird results I don't understand,
sometimes it changes the background color,
or the background color onscreen is different than the background color of the image I get from saveFrame().

colorMode(RGB,255);
//background(127,127,127);
background(255,255,255);

//stroke(r,g,b,alpha)
//stroke(75,150,225,75);
stroke(75,150,225,50);
point(x,y);
saveFrame(out_file);
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sd
Re: What is ALPHA ? How does it work ?
Reply #1 - Oct 16th, 2006, 1:45pm  
Alpha is the degree of opacity that you get in a colour. Depending on the alpha value you give to a coloured pixel, it becomes that much transparent.
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