Question

I am currently programming in java using proccessing and I am try to make 4 instances of the same class collide with one another, I have used a Boolean function to detect when the images are close to each other but I'm unsure of what to do in the next stage, I need them to bounce off each other and go in different directions.

Here is all my code -

Walker Bob, Fred, John, Eric;

void setup()
{
size(500,500);
Bob = new Walker(0,5, 1, 1);
Fred = new Walker(0,120, 1, 1);
John = new Walker(0,240, 1, 1);
Eric = new Walker(0,360, 1, 1);
}

void draw()
{
background(125);
Bob.update();
Fred.update();
John.update();
Eric.update();
}

Walker Class -

{
float x=0;
float y=0;
PImage img1, img2, img3, img4;
float speedX;
float speedY;

Walker(int y, int x, int speedX, int speedY)
{
this.y = y;
this.x = x;
img1 = loadImage("walk1.gif");
img2 = loadImage("walk2.gif");
img3 = loadImage("walk3.gif");
img4 = loadImage("walk4.gif");
this.speedX = speedX;
this.speedY = speedY;
}

void render()
{
if (speedX > 0)
image(img4, x, y);
if (speedX < 1)
image(img3, x, y);
if (speedY < 1 && speedX > 0)
image(img1, x, y);
if (speedY > 0 && speedX < 1)
image(img2, x, y);
{
x=x+speedX;
if (x>=485 || x<=0)
speedX=-speedX;

y=y+speedY;
if (y>=485 || y<=0)
speedY=-speedY;
}
}
void move()
{
x=x+speedX;
y=y+speedY;
}

void update()
{
render();
move();
}
  
boolean crash(Walker other)
{
return (abs(this.x-other.x) < 10 && abs(this.y-other.y) < 10);
}

}

Answer 1

Create a infinite loop in main class in which you have:

Bob.move();
Fred.move();
John.move();
Eric.move();

After each move check if they crash with all the other classes or not, if they crash:

speedX = -speedX

speedY = -speedY