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Index › Programming Questions & Help › Processing Implementations › What must i do in this java-script
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What must i do in this java-script (Read 1369 times)
Kite_Fan
What must i do in this java-script
Mar 7th, 2009, 9:29pm  
What must i do in this java-script to display an egg?

Egg e1;
void setup()
{
 size(400, 400);
 smooth();
}
class Egg {
 float x, y; // X-coordinate, y-coordinate
 float angle; // Used to define the tilt
 float scalar; // Height of the egg
 // Constructor
 Egg(int xpos, int ypos, float s) {
   x = xpos;
   y = ypos;
   scalar = s / 100.0;
 }
 void display() {
   noStroke();
   fill(255);
   translate(x, y);
   scale(scalar);
   beginShape();
   vertex(0, -100);
   bezierVertex(25, -100, 40, -65, 40, -40);
   bezierVertex(40, -15, 25, 0, 0, 0);
   bezierVertex(-25, 0, -40, -15, -40, -40);
   bezierVertex(-40, -65, -25, -100, 0, -100);
   endShape();
 }
}
void draw()
{
 e1.display();
 background(0);
e1 = new Egg(66, 132, 66);
}

there comes an error : "NullPointerExeption"
and a grey window, that i can only close with Taskmamager
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PhiLho 
Re: What must i do in this java-script
Reply #1 - Mar 7th, 2009, 10:24pm  
If that's like in classical Processing, the problem is that you initialize your egg after using it...
You should move the e1 = new Egg() cal in the setup().
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Kite_Fan
Re: What must i do in this java-script
Reply #2 - Mar 10th, 2009, 8:06pm  
PhiLho  wrote on Mar 7th, 2009, 10:24pm:
If that's like in classical Processing, the problem is that you initialize your egg after using it...
You should move the e1 = new Egg() cal in the setup().


Thanks, that´s it!
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