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Index › Suggestions & Bugs › Software Bugs › PGraphics
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PGraphics (Read 3355 times)
JohnG
PGraphics
Apr 19th, 2005, 4:06pm  
I know from the alpha versions, some people (myself included) discovered, and made use of the BGrpahics object.

Now we have PGraphics, but which requires 3 arguments when creating width,height and "processing.core.PApplet".

However, the only option I could think of to add to the creation call for the third option would be "this" i.e. the parent applet.

Now unfortunately, that doesn't make it work the same as in Alpha versions. Is there a was to create a new PGraphics in the same was as BGraphics? Or is there a new object type that can fill the same role as the old BGraphics?
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fry
Re: PGraphics
Reply #1 - Apr 19th, 2005, 4:24pm  
BGraphics b = new BGraphics(200, 200)
would be done with
PGraphics2 p = new PGraphics2(200, 200, null)

having to include the "2" in there is a temporary thing... i'll add this one to the faq.
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rgovostes
Re: PGraphics
Reply #2 - Apr 24th, 2005, 4:14am  
Code:
java.lang.NullPointerException
      at java.awt.image.BufferedImage.setRGB(Unknown Source)
      at processing.core.PGraphics2.updatePixels(PGraphics2.java:866)


That's what I get when I try to create a PGraphics2 with null as the PApplet (or "this").
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rgovostes
Re: PGraphics
Reply #3 - Apr 24th, 2005, 5:01am  
Calling loadPixels() on the new object seems to stop the error, but it's not drawing anything for me...
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fry
Re: PGraphics
Reply #4 - Apr 24th, 2005, 6:24am  
could you provide a little more code (the minimum, really) that's needed in order to reproduce the error?
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rgovostes
Re: PGraphics
Reply #5 - Apr 24th, 2005, 2:39pm  
Sorry,

Code:
PGraphics2 img = new PGraphics2(220, 176, null);
img.loadPixels();
img.background(0xFF00FF00);
image(img, 0, 0);


I would expect that to draw a 220x176 green box at (0, 0), but it draws nothing.

Using set(0, 0, img); draws a black box at (0, 0), but the color isn't there.
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fry
Re: PGraphics
Reply #6 - Apr 24th, 2005, 3:41pm  
got it, that looks like a bug.

i hadn't tested using new PGraphics objects very thoroughly before beta so i'll look into it and see what's up.
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fry
Re: PGraphics
Reply #7 - Jul 28th, 2005, 3:57am  
k, now filed in the bugs list at:
http://dev.processing.org/bugs/show_bug.cgi?id=92
follow-ups can happen there.
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