Create boundaries for tank

Processing Coding Questions
1

My assignment is to create a program that allows the user to drive a tank around the screen. It needs to have walls on at the edges of the screen and 2 boundaries that are each larger than the tank. When a tank is moved into a boundary that move will be undone, but the tank will keep the direction of the pressed key.

  • Required Method: boolean hitBoundary()
  • Returns true when the tank intersects a wall or boundary and false otherwise.

I can’t figure out how to create the boundaries.

PImage right,up,down,left;

int x=30;
int y=30;

int LEFT = 0;
int RIGHT = 1;
int DOWN = 2;
int UP = 3;
int dir;

int speedx=2;
int speedy=2;

boolean tankright,tankup,tankleft,tankdown;

void setup()
{
  size(400,400);
  rectMode(CORNER);

}

void draw()
{
  //bg
  fill(110,185,96);
  rect(0,0,400,400);
  noStroke();
  fill(0);
  //boundary
  rect(70,250,90,40);
  rect(250,100,60,100);
  rect(0,0,400,20);
  rect(380,0,20,400);
  rect(0,0,20,400);
  rect(0,380,400,20);

//images
  if(tankright){
      PImage right=loadImage("Blue Tank Right.png");
    image(right,x,y);
  }
  if(tankleft){
    PImage left=loadImage("Blue Tank Left.png");
    image(left,x,y);
  }
  if(tankup){
        PImage up=loadImage("Blue Tank Up.png");
    image(up,x,y);
  }
  if(tankdown){
    PImage down=loadImage("BlueTank Down.png");
    image(down,x,y);
  }   
}


void keyPressed()
{
  if(key == 'w'){
    y-=speedy;
    dir=UP;
    tankup=true;
    tankright=false;
    tankleft=false;
    tankdown=false;    
  }
  if(key == 's'){
    y+=speedy;
    dir=DOWN;
    tankdown=true;
    tankup=false;
    tankright=false;
    tankleft=false;
  }
  if(key == 'a'){
    x+=speedx;
    dir=LEFT;
    tankleft=false;
    tankup=false;
    tankright=true;
    tankdown=false; 
  }
  if(key == 'd'){
    dir=RIGHT;
    tankright=false;
    tankup=false;
    tankleft=true;
    tankdown=false; 
  } 
  if(dir == RIGHT){
    x-=speedx;
  }
  
  //speed control x
  if(key == '0'){
    speedx=0;
    speedy=0;
  }
  if(key == '1' && dir == RIGHT){
    speedx=-1;
  }
  if(key == '1' && dir == LEFT){
    speedx=+1;
  }
  if(key == '2' && dir == RIGHT){
    speedx=-2;
  }
  if(key == '2' && dir == LEFT){
    speedx=+2;
  }
  if(key == '3' && dir == RIGHT){
    speedx=-3;
  }
  if(key == '3' && dir == LEFT){
    speedx=+3;
  }
  //speed control y
  if(key == '1' && dir == UP){
    speedy=-1;
  }
   if(key == '1' && dir == DOWN){
     speedy=+1;
  }
   if(key == '2' && dir == UP){
     speedy=-2;
  }
   if(key == '2' && dir == DOWN){
     speedy=+2;
  }
   if(key == '3' && dir == UP){
     speedy=-3;
  }
   if(key == '3' && dir == DOWN){
     speedy=+3;
  }
}
2

Step One:

DO NOT CALL loadImage() FROM INSIDE draw().

You must immediately fix this.
Load your images only once.
Load them in setup().

3

Oops – sorry @TfGuy44 – I accidentally bumped this post up from 2018 while tagging hundreds of posts with “homework”.