C#

Premisoft wrote:

it just steps on to the

if(!(x' in range [-(r + ½w), r + ½w]) || (y' in range [-(r + ½h), r + ½h])) no collision;

if((x' in range [-½w, ½w]) || (y' in range [-½h, h])) collision;

var dx1 = x' - ½w, dx2 = x' + ½w, dy1 = y' - ½h, dy2 = y' + ½h;
var dx_closest = min(dx1, dx2), dy_closest = min(dy1, dy2);
if(r² > (dx² + dy²)) collision;

public class Ball
   {
       Player square;
       public float x, y, yvel, radius;
       public Brush brush;
       public Ball(int gameWidth,int gameHeight,Random r)

       {

           x = r.Next(gameWidth);
           y = r.Next(gameHeight);

           yvel = r.Next(2) + 2;

           radius = r.Next(10) + 5;
           brush = new SolidBrush(Color.Blue);

       }

       public void Move(int gameHeight)
       {
           //Part that moves the circle verticall across the screen
           if (y + radius >= gameHeight - 315)
           {
               y = 0;
           }
           y += yvel;
           //This is where collision function is called
           if ((y + radius) > gameHeight - 315 && collision(square))
           {
               MessageBox.Show("Collision");

           }

       }

       public void Draw(Graphics g)
       {

           g.FillEllipse(brush, new RectangleF(x-radius,y - radius, radius * 2, radius * 2));

       }


       //The part for checking collision between the circle and the square. The square radius and height is 15
       public bool collision(Player player)
       {
           float X = (x - (player.x + 15));

           float Y = y - (player.y + 15);

           return (!(-(radius + 15) < X || X < (radius + 15) || -(radius + 15) < Y || Y < (radius + 15)));


       }

   }