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Index › Programming Questions & Help › Syntax Questions › Storing locations
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Storing locations (Read 2257 times)
katy_lil
Re: Storing locations
Reply #15 - Mar 26th, 2007, 4:43pm  
If I am storing all 4 locations in an array is it possible to then compare them to see if any of the values are the same?

Thanks
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mistergreen
Re: Storing locations
Reply #16 - Mar 26th, 2007, 9:38pm  
use this type of array instead...
http://processing.org/discourse/yabb_beta/YaBB.cgi?board=Syntax;action=display;num=1174932444

it's more flexible than the standard array, and won't give you the out of bounds issue.... Array.length is not supported in JAVA & Processing.
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JohnG
Re: Storing locations
Reply #17 - Mar 26th, 2007, 9:45pm  
What are you talking about Array.length not supported?

Code:
int[] foo;
foo=new int[5];

println(foo.length);
foo=append(foo,3);
println(foo.length);
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katy_lil
Re: Storing locations
Reply #18 - Mar 26th, 2007, 10:10pm  
I thought I just took this code:

 for(int i=0;i<mX.length;i++)
{
 println("mX["+i+"]="+mX[i]);
}


And then do some comparing magic - confused! :S
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katy_lil
Re: Storing locations
Reply #19 - Mar 26th, 2007, 10:59pm  
So I need to create an array that stores the X and Y location and then say that if any other X or Y locations come with -5 or +5 of the pervious couple of X and Y locations it does something else. - if that makes sense?
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mistergreen
Re: Storing locations
Reply #20 - Mar 27th, 2007, 3:08am  
Quote:
What are you talking about Array.length not supported?

Code:
int[] foo;
foo=new int[5];

println(foo.length);
foo=append(foo,3);
println(foo.length);


sorry about that... I haven't used processing in a while. I guess they added new array handlers.

and katty_III...
here's an example of  What I think you're talking about.. I'm getting reacquainted with processing and I whipped this up...
I had to use ArrayList instead of Array.. I found a bug with casting issues in a regular array.

Code:

//ArrayList to store positions of points
ArrayList myPoint;

void setup() {
  size(200, 200);
  background(104);
   myPoint = new ArrayList();
   
  //create 5 random points on stage
  for(int i=0; i < 5; i++) {
    myPoint.add( new Point(random(200), random(200)) );
  }
}

void draw() {
  
}

void mousePressed() {
  //add point 
   myPoint.add(new Point(mouseX, mouseY) );
   //check the distance of the new point to the other points
   boolean tooClose = false;
   for(int i=0; i < myPoint.size()-1; i++) {
     //get the point that just was added
     Point tempCurrent = (Point) myPoint.get(myPoint.size()-1);
     //get all the points
     Point tempPoint =(Point) myPoint.get(i);
     //check the distance between all the points to the one that was just added
     if( dist(tempCurrent.xpos, tempCurrent.ypos, tempPoint.xpos, tempPoint.ypos) <= 15) {
       tooClose = true;
     } else {
       tooClose = false;
     } 
   }
  
  //signal if it's too close or not
  if(tooClose == false) {
    println("cool");
  } else {
    println("WHOA!... too close");
  }
     
}

class Point { 
  float xpos, ypos; 
  
  Point (float x, float y) {
    xpos = x;  
    ypos = y; 
    fill(200);
    ellipseMode(CENTER);
    ellipse(x,y, 5,5);
  } 
}
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katy_lil
Re: Storing locations
Reply #21 - Mar 27th, 2007, 10:19am  
Cheers - another quick question is how would I then say if any of these points are the same value then do something else...
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mistergreen
Re: Storing locations
Reply #22 - Mar 27th, 2007, 3:30pm  
Code:

if( dist(tempCurrent.xpos, tempCurrent.ypos, tempPoint.xpos, tempPoint.ypos) <= 15) { 
	 tooClose = true; 
} else { 
	 tooClose = false; 
}


this is where it check for distance...
you can do another condition to check for distance where the distance is == 0.
Code:

if( dist(tempCurrent.xpos, tempCurrent.ypos, tempPoint.xpos, tempPoint.ypos) == 0) { 
     println("right on");
}
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