Two Player Snake - OpenProcessing

mySketch
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import java.util.Arrays;
​
//Alex Rosenthal
//test implementation of 2 player snake
//March 22, 2015
​
boolean wrap = true;       //snakes wrap to other edge of screen
ArrayList keyQ = new ArrayList<String>(); //List of pressed keys
ArrayList keyQ2 = new ArrayList<String>();
int direc = 0;             // 0 = East, 1 = South, 2 = West, 3 = North
int direc2 = 2;
int len;
int len2;
int headY = 0;
int headX = 0;
int headY2 = 0;
int headX2 = 0;
int goalX;
int goalY;
boolean game;
Grid grid;
int c = 0;
int l = 0;
int s1 = 0;
int s2 = 0;
boolean s = true;
int bg = 75;
​
​
void setup(){
  c = 0;
  game = true;
  size(500,500);
  background(bg);
  direc = 0;
  direc2 = 2;
  len = 11;
  len2 = -11;
  grid = new Grid(50);
  grid.init();
  headX = 0;
  headY = grid.squares/2;
  headX2 = grid.squares-1;
  headY2 = headY+0;
  s = true;
  while(keyQ.size() != 0)
    keyQ.remove(0);
  while(keyQ2.size() != 0)
    keyQ2.remove(0);
}
​
void draw(){
  textAlign(CENTER,CENTER);
  if(game){
    if(c == 2){
      checkKeyPressed();
      c = 0;
      if(direc == 0)
        grid.step(headX+1,headY,1);
      else if(direc == 1)
        grid.step(headX,headY+1,1);
      else if(direc == 2)
        grid.step(headX-1,headY,1);
      else if(direc == 3)
        grid.step(headX,headY-1,1);
        
      if(direc2 == 0)
        grid.step(headX2+1,headY2,2);
      else if(direc2 == 1)
        grid.step(headX2,headY2+1,2);
      else if(direc2 == 2)
        grid.step(headX2-1,headY2,2);
      else if(direc2 == 3)
        grid.step(headX2,headY2-1,2);
        
      background(bg);
      fill(0);
      rect(0,0,width,height);
      grid.set(headX, headY, len);
      grid.set(headX2, headY2,len2);
      grid.subtract();
      grid.display();
      if(l == 3){
        if(headY != headY2 && headX != headX2)
          l = 1;
        else if(abs(headX-headX2)>1 || abs(headY-headY2)>1)
          l = 1;
      }
    } 
   else c++; 
  }
  else{
    textSize(height/20);
    if(s){
      s = false;
      if(l == 1)
        s2 += 1;
      else if(l == 2)
        s1 += 1;
    }
    if(l == 1){
      fill(150,0,0);
      text("RED WINS",width/2,height/2);
    }
    else if(l == 2){
      fill(0,0,150);
      text("BLUE WINS",width/2,height/2);
      //text("LENGTH: "+(len-1), w/3, 4*h/7);
    }
    else{
      fill(150);
      text("TIE",width/2,height/2);
    }
    fill(0,0,150);
    textAlign(LEFT,TOP);
    text(s1,0,0);
    fill(150,0,0);
    textAlign(RIGHT, TOP);
    text(s2,width,0);
    textAlign(CENTER,CENTER);
  }
}
​
public class Grid{ // Grid class, stores integers that represent snakes and goals
  public int[][] x;
  public int squares;
  public int SQ = 5;
  public int gx;
  public int gy;
  
  public Grid(int sq){
    squares = sq;
    SQ = width/sq;
    
    int[][] x = new int[sq][sq];
  }
  
  public Grid(){
    this(50);
  }
  
  public void init(){
    x = new int[squares][squares];
    for(int i = 0; i<x.length-1; i++){
      for(int j = 0; j < x[i].length-1; j++){
        x[i][j] = 0;
      }
    }
    setGoal();
  }
  
  public void display(){
    fill(255);
    noStroke();
    rect(gx*SQ, gy*SQ, SQ, SQ);
    for(int i = 0; i<x.length; i++){
      for(int j = 0; j < x[i].length; j++){
        fill(0,0,255);
        noStroke();
        if(x[i][j] > 0){
          rect(i*SQ, j*SQ, SQ, SQ);}
        fill(255,0,0);
        noStroke();
        if(x[i][j] < 0){
          rect(i*SQ, j*SQ, SQ, SQ);}
      }
    }
  }
  
  public void subtract(){
    for(int i = 0; i<x.length; i++){
      for(int j = 0; j < x[i].length; j++){
        if(x[i][j] > 0){
          x[i][j] -= 1;}
        else if(x[i][j] <0){
          x[i][j] += 1;}
      }
    }
  }
  
  public void set(int vx, int vy, int val){
    x[vx][vy] = val;
  }
  
  public void setGoal(){
    gx = floor(random(squares-1));
    gy = floor(random(squares-1));
    while(x[gx][gy]!=0){
      gx = floor(random(squares));
      gy = floor(random(squares));
    }
    
  }
  
  public void step(int sx, int sy, int h){
    if(!(sx>squares-1 | sx<0 | sy>squares-1 | sy<0)){
      if(sx == gx && sy == gy){
        if(h == 1)
          len += 5;
        else if(h == 2)
          len2 -= 5;
        grid.setGoal();
        if(h == 1){
          headX = sx;
          headY = sy;
        }
        else if(h == 2){
          headX2 = sx;
          headY2 = sy;
        }
      }
      else if(x[sx][sy] != 0){
        l = h;
        if((sx==headX && sy==headY)||(sx==headX2 && sy==headY2))
          l = 3;
        game = false;
      }
      else{
        if(h == 1){
          headX = sx;
          headY = sy;
        }
        else if(h == 2){
          headX2 = sx;
          headY2 = sy;
        }
      }
    }
    else{
      if(wrap){
        if(sx<0)
          step(squares - 1,sy,h);
        else if(sy<0)
          step(sx,squares - 1,h);
        else if(sx>=squares)
          step(0,sy,h);
        else if(sy>=squares)
          step(sx,0,h);
      }
      else{
        l = h;
        game = false;
      }
    }
  }
}
​
void checkKeyPressed(){
  if(keyQ.size() > 0){
    if(keyQ.get(0).equals("w") && direc!=1)
      direc = 3;
    else if(keyQ.get(0).equals("d") && direc!=2)
      direc = 0;
    else if(keyQ.get(0).equals("s") && direc!=3)
      direc = 1;
    else if(keyQ.get(0).equals("a") && direc!=0)
      direc = 2;
    keyQ.remove(0);
  }
  if(keyQ2.size()>0){
    if(keyQ2.get(0).equals("I") && direc2!=1)
      direc2 = 3;
    else if(keyQ2.get(0).equals("L") && direc2!=2)
      direc2 = 0;
    else if(keyQ2.get(0).equals("K") && direc2!=3)
      direc2 = 1;
    else if(keyQ2.get(0).equals("J") && direc2!=0)
      direc2 = 2;
    keyQ2.remove(0);
    
  }
}
​
void keyPressed(){
  if(key == 'r' || key == ' ')
    setup();
  else if(key!= CODED)
    keyQ.add(str(key));
  else{
    if(keyCode==UP)
      keyQ2.add("I");
    else if(keyCode == LEFT)
      keyQ2.add("J");
    else if(keyCode == RIGHT)
      keyQ2.add("L");
    else if(keyCode == DOWN)
      keyQ2.add("K");
  }
}