void setup() {
size(640,
480); //W, H
}
int r_x = 0;
int e_x = 20, e_y = 20;
int e_add_x = 3, e_add_y = 3;
void draw() {
background(200, 200, 200); //R, G, B
noStroke();
fill(255,
0, 0); //R, G, B
rect(r_x, 400, 100, 30); //X, Y, W, H
stroke(0,
0, 0);
fill(0,
255, 0);
ellipse(e_x, e_y, 20, 20); // X, Y, RX, RY
e_x += e_add_x;
e_y += e_add_y;
if(e_x < 10 || e_x >
640-10) e_add_x = -e_add_x;
if(e_y < 10 || e_y >
480-10) e_add_y = -e_add_y;
if(e_x > r_x && e_x <
r_x+100 && e_y > 400 && e_y < 400+30)
e_add_y = -e_add_y;
}
void keyPressed() {
if(keyCode == LEFT) {
r_x -= 10;
if(r_x < 0) r_x = 0;
} else
if(keyCode == RIGHT) {
r_x += 10;
if(r_x > 640-100) r_x = 640-100;
}
}
