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Topic: nullpointer exception on new BImage(w,h) (Read 496 times) |
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elout
 
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nullpointer exception on new BImage(w,h)
« on: Oct 10th, 2003, 6:46pm » |
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this gives a me a nullpointer exception
Code:
// p5 v.0065
BImage a;
void setup()
{
size(200, 200);
BImage a= new BImage(32,32);
}
void loop()
{
for (int i=0;i<32*32;i++)
{
a.pixels[i]=(int) random(255);
}
image(a, 0, 0, width, height);
}
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although this works
Code:
// p5 v.0065
void setup()
{
size(200, 200);
}
void loop()
{
BImage a= new BImage(32,32);
for (int i=0;i<32*32;i++)
{
a.pixels[i]=(int) random(255);
}
image(a, 0, 0, width, height);
}
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arielm
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Re: nullpointer exception on new BImage(w,h)
« Reply #1 on: Oct 11th, 2003, 12:56am » |
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not a bug in processing this time,
it's because you declare "a" as a global variable, but inside setup(), you assign a value to a local variable, also named "a" (but not the same one!)
solution: inside setup(), remove "BImage" before "BImage a =..."
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| « Last Edit: Oct 11th, 2003, 12:57am by arielm » |
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Ariel Malka | www.chronotext.org
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