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Index › Programming Questions & Help › Syntax Questions › Create a rect, put it on top of another
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Create a rect, put it on top of another? (Read 841 times)
08070104
Create a rect, put it on top of another?
Dec 9th, 2009, 1:56pm  
Can I assign a layer number/attribute to a rect or quad so that I can put certain shapes in front of (above) others?
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Cedric
Re: Create a rect, put it on top of another?
Reply #1 - Dec 9th, 2009, 2:20pm  
its just the order you draw them in your draw loop.

if you write

ellipse(x,y,10,10);
rect(x,y,10,10);

the rect is above the circle.

rect(x,y,10,10);
ellipse(x,y,10,10);

or the other way...
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blindfish
Re: Create a rect, put it on top of another?
Reply #2 - Dec 9th, 2009, 2:54pm  
I did find a 'layers' library the other day; though it looked like you had to jump through some hoops to make it work...  Still, might be interesting as I've yet to see a satisfactory way of changing the order of layers on-the-fly.  I suppose you could put things into a container and iterate through that calling the objects' draw methods; and change the order of the objects in the container as necessary...   Undecided
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Where is the what if the what is in why?
 
Cedric
Re: Create a rect, put it on top of another?
Reply #3 - Dec 9th, 2009, 3:16pm  
i remembered the library too but i thought it might be too much in this case. but true, if you want to change the order it might be useful

here it is : http://processing.org/discourse/yabb2/num_1259116487.html#1
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blindfish
Re: Create a rect, put it on top of another?
Reply #4 - Dec 9th, 2009, 3:47pm  
Cedric wrote on Dec 9th, 2009, 3:16pm:
i remembered the library too but i thought it might be too much in this case.


Probably correct, but it's an issue worth discussing.  registerDraw(), which you can use to register a class's draw method with the sketch, apparently puts all registered objects into a simple array.  I've no idea if this array is exposed in any way or what would happen if you tried to change the order of its contents on-the-fly; but I'm curious to find out...
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Where is the what if the what is in why?
 
08070104
Re: Create a rect, put it on top of another?
Reply #5 - Dec 9th, 2009, 4:11pm  
thanks guys, this should be more than adequate for what I want to achieve! Smiley
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