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Index › Programming Questions & Help › Programs › boolean color sampling
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boolean color sampling (Read 445 times)
zach_rose
boolean color sampling
Apr 13th, 2007, 8:02pm  
Hello. I'm trying to make a part of my program gather information about the color of certain pixels, and then run an if-then statement to build from that pixel if it matches the background color. My current code is this:

 color probe0 = get(ax, ay);
 if (probe0 = (bg)) {

and Processing tells me "Semantic Error: The type of this expression, "float", is not "boolean"."

I'm very new to Processing and coding in general. Any advice would be most appreciated.
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JohnG
Re: boolean color sampling
Reply #1 - Apr 13th, 2007, 9:03pm  
You need two "="s. "=" means "set to", "==" means "compare to"

So in a test you need to do "if(thing1 == thing2" not "if(thing1 = thing2)"
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fjen
Re: boolean color sampling
Reply #2 - Apr 13th, 2007, 9:05pm  
=
is to assign a value ("set")
==
is to compare values ("equals")

should be:

if (probe0 == bg) { ...

F

( ha, john was faster ... )
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