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Index › Programming Questions & Help › Syntax Questions › Saving sections of the screen.
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Saving sections of the screen. (Read 642 times)
Woodlouse
Saving sections of the screen.
Nov 15th, 2009, 10:40am  
I've been looking through get(), copy(), saveFrame etc to find a way of saving the current screen of the sketch, and until now saveFrame worked ok, but i now only want to save an area of the screen to be saved to the data file. Is there a function that 'combines' saveFrame & copy()!?
Cheers, W.
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blindfish
Re: Saving sections of the screen.
Reply #1 - Nov 15th, 2009, 10:52am  
I'm pretty sure you can use createImage() for that...
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Where is the what if the what is in why?
 
Woodlouse
Re: Saving sections of the screen.
Reply #2 - Nov 15th, 2009, 10:57am  
OK i'll just giv it another go:)
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blindfish
Re: Saving sections of the screen.
Reply #3 - Nov 15th, 2009, 11:58am  
Sorry - I'd assumed you'd looked at PImage docs and I should have looked at them more carefully  Embarrassed

Since get() returns a PImage you can simply use PImage.save() to save to a file.  Also note that you can use get() on its own - without attaching it to a PImage object - to get a portion of the sketch window...

So you can do the following:

Code:
int divisions = 10;

void setup() {
  size(400,400);
  int divWidth = width/divisions;
  int divHeight = height/divisions;
  
  for(int i=0; i<width; i+=divWidth) {
    for(int j=0; j<height; j+=divHeight) {
      int r = (int)random(255);
      int g = (int)random(255);
      int b = (int)random(255);
      fill(r,g,b);
      rect(i,j,divWidth,divHeight);
    }
  } 
  // Create a PImage from any portion of the screen:
  PImage outputImage = get(100,100,200,200);
  // And save it...
  outputImage.save("img.jpg");
}
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Where is the what if the what is in why?
 
Woodlouse
Re: Saving sections of the screen.
Reply #4 - Nov 15th, 2009, 12:31pm  
Stunning that's a (horribly obvious solution after so long thinking about it! &) massive help, thanks once again!
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