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Topic: width - from inside an object (Read 306 times) |
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kevin
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width - from inside an object
« on: Sep 10th, 2003, 12:33pm » |
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Hi,
How can an object find out the width? Do I need to specificy the root object for it to work (and if so, how)
Here's what I'm doing.
Code:testClass myClass = new testClass();
// Setup Stuff
void setup() {
size(200,200);
background(255);
fill(255,234,78);
ellipseMode(CENTER_RADIUS);
}
// Main Loop
void draw() {
myClass.display();
}
class testClass {
int x, y;
// constructor class
testClass() {
print (width);
x = (int)random(width);
y = (int)random(height);
}
//move class
void display() {
ellipse(x,y,10,10);
}
} |
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The print statement prints out width as 0, and the ellpise is drawn at 0,0.
thanks a lot
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toxi
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Re: width - from inside an object
« Reply #1 on: Sep 10th, 2003, 1:28pm » |
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if you look closely at your code, you should be able to answer this yourself 
the constructor of your test class is called before the setup() method is executed, hence the "width" variable is still at its default value (0)...
let me point you to another thread (and specifically my 2nd post) about related problems...
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http://toxi.co.uk/
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kevin
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Re: width - from inside an object
« Reply #2 on: Sep 11th, 2003, 11:33am » |
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Ah yes, that makes sense, I'm not thinking very logically. I wish there was a book on processing, so I have a better idea of the overall picture.
Cheers toxi, you're a wealth of information, so I'm getting there slowly.
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