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Index › Programming Questions & Help › Programs › Moving an object to a specified coordinate
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Moving an object to a specified coordinate (Read 613 times)
nx0
Moving an object to a specified coordinate
Dec 31st, 2009, 3:59pm  
In the following program:

Code:
int x,y;
int go = 0;

void setup() {
  size(500,500);
  background(0,0,0);
  ellipseMode(CENTER);
}

void draw() {
  if (go == 1) {
    fill(x/2, y/2, 100);
    background(0,0,0);
    ellipse(x, y, 50, 50);
  }
}

void mousePressed() {
  go = 1;
  x = mouseX;
  y = mouseY;
}


I'm trying to get the ellipse that is created upon clicking the mouse to move to a specified coordinate. Any help on how to do this?

Thanks.
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kostino
Re: Moving an object to a specified coordinate
Reply #1 - Dec 31st, 2009, 10:31pm  
Try this...
Code:

float x,y;
float speed = 1;
PVector vm, ve, vgo; 

void setup() {
  size(500,500);
  frameRate(60);
  background(0,0,0);
  ellipseMode(CENTER);
  vm = new PVector(0,0);
  ve = new PVector(0,0);
  vgo = new PVector(0,0);
}

void draw() {
    vgo = PVector.sub(vm,ve); //calculate the vector between ellipse and mouse
    vgo.normalize();  //sets the vector length to 1
    vgo.mult(speed);  //sets the vector length to "speed"
    ve.add(vgo);      //add the movement vector to the ellipse position
    fill(ve.x/2, ve.y/2, 100);  //draw ellipse
    background(0,0,0);
    ellipse(ve.x, ve.y, 50, 50);
}

void mousePressed() {
  vm = new PVector (mouseX, mouseY);
}  

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