private void movement_Tick(object sender, EventArgs e)
{
// laser movement
for (int i = 0; i < laser_list.Count; i++)
{
Shot s = new Shot();
s.graphic = laser_list[i].graphic;
s.x = laser_list[i].x;
s.y = laser_list[i].y - laser_speed;
laser_list.RemoveAt(i);
laser_list.Insert(i, s);
}
// asteroid movement
for (int i = 0; i < asteroid_list.Count; i++)
{
Asteroid a = new Asteroid();
a.graphic = asteroid_list[i].graphic;
a.x = asteroid_list[i].x;
a.y = asteroid_list[i].y + asteroid_list[i].speed;
a.speed = asteroid_list[i].speed;
a.type = asteroid_list[i].type;
a.hp = asteroid_list[i].hp;
a.size = asteroid_list[i].size;
asteroid_list.RemoveAt(i);
asteroid_list.Insert(i, a);
}
// detect collisions
// asteroid with ground
for (int i = 0; i < asteroid_list.Count; i++)
{
Asteroid cur_asteroid = asteroid_list[i];
// COLLISION WITH SHIP
if ((cur_asteroid.y > (800 - cur_asteroid.size - 100)) && (Math.Abs(cur_asteroid.x - spaceship.Location.X) < 50))
{
// reduce lives
numLives = 0;
Debug.WriteLine("GAME OVER");
// remove all lasers and asteroids
asteroid_list.Clear();
laser_list.Clear();
// disable timers
movement_timer.Stop();
spawn_timer.Stop();
level_timer.Stop();
movement_timer.Enabled = false;
spawn_timer.Enabled = false;
level_timer.Enabled = false;
// display game over message
countdown_label.Text = "Game Over";
countdown_label.Show();
// set boolean
GameOver = true;
lives.Text = "Lives: 0";
}
// COLLISION WITH FLOOR
if (cur_asteroid.y > (800 - cur_asteroid.size))
{
// reduce # lives
Debug.WriteLine("LIFE LOST");
numLives--;
String lives_text = "Lives: " + numLives.ToString();
lives.Text = lives_text;
// remove graphic
asteroid_list.RemoveAt(i);
// end game if # lives == 0
if (numLives == 0)
{
Debug.WriteLine("GAME OVER");
// remove all lasers and asteroids
asteroid_list.Clear();
laser_list.Clear();
// disable timers
movement_timer.Stop();
spawn_timer.Stop();
level_timer.Stop();
movement_timer.Enabled = false;
spawn_timer.Enabled = false;
level_timer.Enabled = false;
// display game over message
countdown_label.Text = "Game Over";
countdown_label.Show();
// set boolean
GameOver = true;
}
}
// COLLISION WITH LASER
for (int j = 0; j < laser_list.Count; j++)
{
Shot cur_laser = laser_list[j];
if ((Math.Abs(cur_asteroid.y - cur_laser.y) < cur_asteroid.size) && (Math.Abs(cur_asteroid.x - cur_laser.x) < cur_asteroid.size))
{
// decrement asteroid HP
cur_asteroid.hp = cur_asteroid.hp - 1;
Debug.WriteLine(cur_asteroid.hp);
// remove laser
laser_list.RemoveAt(j);
// increase points & redo label
points = points + point_increment;
String score_text = "Score: " + points.ToString();
score.Text = score_text;
// reinsert asteroid
if (cur_asteroid.hp != 0)
{
asteroid_list.RemoveAt(i);
asteroid_list.Insert(i, cur_asteroid);
}
else
{
asteroid_list.RemoveAt(i);
}
}
}
}
// redraw objects
this.Invalidate();
}
private void Asteroids_KeyPress(object sender, KeyPressEventArgs e)
{
if (e.KeyChar == ' ' && !Shooting && !GameOver)
{
// shoot
Shooting = true;
System.Drawing.SolidBrush myBrush = new System.Drawing.SolidBrush(System.Drawing.Color.HotPink);
System.Drawing.Graphics laser;
laser = this.CreateGraphics();
laser.FillRectangle(myBrush, new Rectangle(this.spaceship.Location.X + 23, this.spaceship.Location.Y - 15, laser_size, laser_size));
myBrush.Dispose();
Shot shot = new Shot();
shot.graphic = laser;
shot.x = this.spaceship.Location.X + 23;
shot.y = this.spaceship.Location.Y - 15;
laser_list.Add(shot);
}
}