Hi!
As the title states, I'm attempting to detect a collision between two objects, ignoring the object that is attempting to detect the collisions itself.

I've pasted the code below:

Code:

// These are actually in three different "tabs", so I'll separate them by comments

int x = 0;
int y = 0;

Vector entities = new Vector();

int numEntities = 0;

void setup() {
  size(800, 640);
  // Init all controller keys to "not pressed"
  for (int i = 0; i < 4; i++) {
    keys[i] = false;
  }
  entities.add(new Entity(mouseX, mouseY));
}

void draw() {
  background(255);
  move();
  drawEntities();
}



void move() {
  if(keys[W] == true) {  //Move the left player up.
    if (( (Entity) entities.get(0) ).getCanJump()) {
	( (Entity) entities.get(0) ).setJumping(true);
    }
  }
  if(keys[A] == true) {  //Move the left player down.
    ( (Entity) entities.get(0) ).setX( ( (Entity)entities.get(0) ).getX()-6 );
  }
  if(keys[S] == true) {  //Move the right player up.
    ( (Entity) entities.get(0) ).setY( ( (Entity)entities.get(0) ).getY()+6 );
  }
  if(keys[D] == true) {  //Move the right player down.
    ( (Entity) entities.get(0) ).setX( ( (Entity)entities.get(0) ).getX()+6 );
  }
}

void mousePressed() {
  entities.add(new Entity(mouseX, mouseY));
}

void drawEntities() {
  for (int i=0; i<entities.size(); i++){
    ((Entity)entities.get(i)).update();
  }
}

// new tab

class Entity {

  int x;
  int y;

  int ewidth;
  int eheight;

  float vspeed;
  float hspeed;


  boolean canJump;
  boolean jumping;

  int jumpStep;

  Entity (int x, int y) {

    this.x = x;
    this.y = y;

    this.vspeed = 9.8;
    this.canJump = true;
    this.jumping = false;
    this.jumpStep = 0;

    this.ewidth = 50;
    this.eheight = 50;
  }
  int getX() {
    return this.x;
  }
  int getY() {
    return this.y;
  }
  int getEWidth() {
    return this.ewidth;
  }
  int getEHeight() {
    return this.eheight;
  }
  void setX(int x) {
    x = max(0, min(800-50, x));
    this.x = x;
  }
  void setY(int y) {
    y = max(0, min(640-50, y));
    this.y = y;
  }  
  void calculateGravity() {
    this.vspeed = this.vspeed += .5;
  }
  boolean getCanJump() {
    return this.canJump;
  }
  void setJumping(boolean jumping) {
    this.vspeed = -10;
    this.canJump = false;
    this.jumping = jumping;
  }
  void update() {
    calculateGravity();

    if ((int)floor(this.y+this.vspeed) >= 590 || collWithAnyEntityY() != -1) {
	this.y = 590;
	this.jumping = false;
	this.canJump = true;
    } 
    else {
	this.y = (int)floor(this.y+this.vspeed);
    }

    this.x = max(0, min(750, (int)ceil(this.x+this.hspeed)));
    rect(this.x, this.y, this.ewidth, this.eheight);
  }
  boolean collWithEntityX(Entity entity) {
    return !(this.x > entity.getX() + entity.getEWidth() || this.x+this.ewidth < entity.getX());
  }
  boolean collWithEntityY(Entity entity) {
    return !(this.y > entity.getY() + entity.getEHeight() || this.y + this.eheight < entity.getY());
  }
  int collWithAnyEntityX() {
    int myID = entities.indexOf(this);
    int collID = -1;
    for (int i=0; i<entities.size(); i++){
	if (i != ) {
	  if (collWithEntityX(((Entity)entities.get(i)))) {
	    collID = i;
	  }
	}
    }
    return collID;
  }
  int collWithAnyEntityY() {
    int myID = entities.indexOf(this);
    int collID = -1;
    for (int i=0; i<entities.size(); i++){
	if (i != this.id) {
	  if (collWithEntityY(((Entity)entities.get(i)))) {
	    collID = i;
	  }
	}
    }
    return collID; 
  }
}

// new tab

boolean[] keys = new boolean[4];
final int W = 0;
final int A = 1;
final int S = 2;
final int D = 3;

void keyPressed() {
  switch(key){
    case('d'):
    keys[D] = true;
    break;
    case('w'):
    keys[W] = true;
    break;
    case('a'):
    keys[A] = true;
    break;
    case('s'):
    keys[S] = true;
    break;    
  }
}

void keyReleased() {
  switch(key){
    case('d'):
    keys[D] = false;
    break;
    case('w'):
    keys[W] = false;
    break;
    case('a'):
    keys[A] = false;
    break;
    case('s'):
    keys[S] = false;
    break;    
  }
} 

as I seem to continuously get the problem of all of the "Entities" sticking to the ground after I add a new one.

Thanks in advice for your help!

EDIT: In fact, I actually wish to detect on which side of the square the collision is taking place - the top, the bottom, the right, or the left. Thanks!

Thanks for replying Quinn!
I must have pasted it wrong, somehow. ?

Anyways, thanks for that tip! I'm still working on the original problem though, so if anyone could lend a hand, I'd be very grateful.

Thanks!