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edited October 2014

Hey guys I was wondering how to program collisions (I'm new to programming). How do I make it so that when Pac man hits any of the ellipses something will happen. For example if I touch an ellipse I want a "game over" sign to appear. I know how to program the sign but how do I program that interaction between pacman and my shapes when they touch each other. This is what I have so far:

``````PImage face;
PImage apple;

int y = 0;
int x = 0;
int speed = 3;
int positionX=700;
int positionY=500;
int diameter=70;

float y = 0;
float yspeed = 3;

float f = random(100,700);

void setup() {
size(700,500);
smooth();
frameRate(300);
}

void draw() {
background(255);
x = x + speed;

//left to right bounce
if ((x > width) || (x < 0)) {
speed = speed * -1;
}
stroke(0);
fill(175);
ellipse(x,100,70,70);
ellipse(x,300,70,70);
ellipse(x,600,70,70);
//up down bounce

y = y + yspeed;

if ((y > height) || (y < 0)) {
yspeed = yspeed * -1;
}
stroke(0);
fill(175);
ellipse(100,y,70,70);
ellipse(300,y,70,70);
ellipse(500,y,70,70);

//Diagnal bounce below

if(positionX>=width-diameter/2){
Switch=1;
}
if(positionX==diameter/2){
Switch=0;
}
if(Switch==0){
positionX++;

}
else if(Switch==1){;
positionX--;

}
if(positionY>=height-diameter/2){
Switch=1;
}
if(positionY==diameter/2){
Switch=0;
}
if(Switch==0){
positionY++;

}
else if(Switch==1){;
positionY--;
}

ellipse(positionX, positionY, diameter, diameter);

//Player image
imageMode(CENTER);
face.resize(50,50);
image(face, mouseX, mouseY);

//random image
apple.resize(40,40);
image (apple, f, f);

}
``````
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