public void Move(Paddle player, Paddle computer)
{
// Balls have more complex movement than paddles. If they hit top or bottom, invert Y velocity.
// If they hit a paddle, change velocity depending upon where on the paddle we hit
// If we the ball misses the paddle and falls off the right or left edge, increase the score of
// the other side, decrease this side's number of lives (if implemented), wait a second or two,
// put the ball back in the center, and give a random direction.
// We might also want (someday) to gradually increase velocity when the player hits the ball back.
// reset collision_occured when we cross centerline
// this avoids the odd case where we collide with the paddle while we are leaving the scene
if ((this.position.X > 350) && (this.position.X < 450))
{
this.collision_occured = false;
}
// check to see if we hit a paddle
if (Player_Collision(player) && this.collision_occured == false)
{
collision_occured = true;
playit = true;
// We hit a paddle; where did we hit?
// If normal, just invert velocity as appropriate, and leave with departure angle equal to attack angle
// If corner, hit a kill shot
if (Corner_Collision(player))
{
// kill shot
velocity = new Vector2((-this.velocity.X * 2), this.velocity.Y + rnd.Next(-1, 2));
}
else
{
// normal ball return; just invert X velocity; play with velocity just a bit
velocity = new Vector2(-this.velocity.X, rnd.Next(((int)this.velocity.Y - 1), ((int)this.velocity.Y + 2)));
}
}
else if (Computer_Collision(computer) && this.collision_occured == false)
{
collision_occured = true;// We hit a paddle; where did we hit?
playit = true;
// If normal, just invert velocity as appropriate, and leave with departure angle equal to attack angle
// If corner, hit a kill shot
if (Corner_Collision(computer))
{
// kill shot
velocity = new Vector2((-this.velocity.X * 2), this.velocity.Y);
}
else
{
// normal ball return; just invert X velocity
velocity = new Vector2(-this.velocity.X, rnd.Next(((int)this.velocity.Y - 1), ((int)this.velocity.Y + 2)));
}
}
//we might be at an edge, do the right thing if needed
// Check right boundary to see if we missed the paddle
else if (this.position.X + this.size.X + this.velocity.X > this.screenSize.X)
{
// Give the other guy a point
scoreComputer += 1;
// Play the paddle miss sound
//TODO
// Go again
Reset();
//
}
// Check left boundary to see if we missed the paddle
else if (this.position.X + this.velocity.X < 0)
{
// Give the other guy a point
scorePlayer += 1;
// Play the paddle miss sound
//TODO
// Go again
Reset();
}
// Check bottom boundary
else if (this.position.Y + this.size.Y + this.velocity.Y > this.screenSize.Y)
{
this.velocity = new Vector2(this.velocity.X, -this.velocity.Y);
}
// Check top boundary
else if (this.position.Y + this.velocity.Y < 0)
{
this.velocity = new Vector2(this.velocity.X, -this.velocity.Y);
}
;