Bouncing off the wall

mid2245

I would like to ask you for help with bouncing off the wall.I would like that ball bounce exactly off the wall(not bounce off other parts of screen).

PImage wall1; int wall1X,wall1Y,wall1W,wall1H; int x; float y; boolean collision; void setup() { size(900,300); frameRate(30); background(255);
wall1=loadImage("wall.png"); wall1X=90; wall1Y=10; wall1W=10; wall1H=100; x=width/2+200; y=random(100,200); }

void draw() { background(255); fill(0); ellipse(x,y,25,25); image(wall1,wall1X,wall1Y,wall1W,wall1H); x-=5;

if(wall1Y<11) { collision=true;
} if(collision)

{ wall1Y+=5; }

if(wall1Y>200) {

collision=false;

} if(collision==false) { wall1Y-=5; } }

kfrajer

Please edit your post, select your code and hit ctrl+o to format your code. Make sure there is an empty line above and below your code

Kf

Chrisir

ok, main idea here is to have a variable that you add to the position of wall (and another for ball); now on reflection you change that directional var.

PImage wall1; 
int wall1X, wall1Y, wall1W, wall1H; 
int x; 
float y;
float xAdd = -5;
float wall1Y_ADD = 5;  
boolean collision; 
void setup() { 
  size(900, 300); 
  frameRate(30); 
  background(255);
  wall1=loadImage("wall.png"); 
  wall1X=90; 
  wall1Y=10; 
  wall1W=10; 
  wall1H=100; 
  x=width/2+200; 
  y=random(100, 200);
}

void draw() { 
  background(255); 
  fill(0); 
  ellipse(x, y, 25, 25); 
  text("wall1", wall1X, wall1Y, wall1W, wall1H);

  // ball 
  x+=xAdd;

  // WALL / PADDLE 
  if (wall1Y<11) { 
    wall1Y_ADD = abs(wall1Y_ADD);
  } 
  if (wall1Y>height-30) {
    wall1Y_ADD = -1 * abs(wall1Y_ADD);
  } 

  wall1Y += wall1Y_ADD;

  // interact ball and paddle 
  if (x<=wall1X+5 &&
    x>wall1X-15 &&
    y>wall1Y && 
    y<wall1Y + wall1H)
  {
    background(255, 0, 0);//RED
    xAdd *= -1;
  }
  //
}