internal Window()
{
game = new SpaceExplorer();
assets = new Assets();
// window settings
Text = "Welcome to Space Explorer!";
Size = new Size(800, 600);
DoubleBuffered = true;
font = new Font("Courier New", 10, FontStyle.Regular);
fontBig = new Font("Courier New", 30, FontStyle.Italic);
// setup a timer to refresh the screen and process game entities
stepTimer = new Timer();
stepTimer.Tick += new EventHandler(Step);
stepTimer.Interval = 16;
stepTimer.Enabled = true;
stepTimer.Start();
// controls
controls.MovementAngle = 0.0f;
controls.LookAngle = 0.0f;
controls.Intensity = 0.0f;
controls.Firing = false;
btnRight = false;
btnLeft = false;
btnDown = false;
btnUp = false;
}
Entity destination; // screen coordinates they are heading to, null if stationary
internal Enemy(float x, float y) : base(x, y, WIDTH, HEIGHT)
{
Rot = SpaceExplorer.RandomInt(0, 360) * ((float)Math.PI / 180.0f);
fireTimer = 0.0f;
aggroTimer = 0.0f;
waitTimer = 0.0f;
destination = null;
health = 100;
}
// process the enemy entities
internal static void Step(List <Enemy> enemyList, List <Bullet> bulletList, Player player)
{
if (enemyList.Count < 5)
{
const int spawnBox = 600;
float newx = SpaceExplorer.RandomInt((int)player.X - spawnBox, (int)player.Y + spawnBox);
float newy = SpaceExplorer.RandomInt((int)player.Y - spawnBox, (int)player.Y + spawnBox);
enemyList.Add(new Enemy(newx, newy));
}
for (int i = 0; i < enemyList.Count;)
{
Enemy enemy = enemyList[i];
// kill the enemy
if (enemy.health < 1)
{
enemyList.RemoveAt(i);
player.Score += Enemy.SCORE;
continue;
}
// update the enemy's position
enemy.X += enemy.Xv * SpaceExplorer.Delta;
enemy.Y += enemy.Yv * SpaceExplorer.Delta;
// reduce timers
if (enemy.fireTimer > 0.0f)
{
enemy.fireTimer -= SpaceExplorer.Delta;
}
if (enemy.aggroTimer > 0.0f)
{
enemy.aggroTimer -= SpaceExplorer.Delta;
}
if (enemy.fireTimer > 0.0f)
{
enemy.fireTimer -= SpaceExplorer.Delta;
}
if (enemy.waitTimer > 0.0f)
{
enemy.waitTimer -= SpaceExplorer.Delta;
}
// shoot at player, or wander around
if (enemy.aggroTimer > 0.0f)
{
// point self at player
enemy.Rot = (float)Math.Atan2((enemy.Y + (HEIGHT / 2)) - (player.Y + (Player.HEIGHT / 2)), (enemy.X + (WIDTH / 2)) - (player.X + (Player.WIDTH / 2)));
// shoot
if (enemy.fireTimer <= 0.0)
{
bulletList.Add(new Bullet(enemy));
enemy.fireTimer = FIRE_TIMER;
}
}
else
{
// wander around
if (enemy.waitTimer <= 0.0 && enemy.destination == null)
{
const int box = 300;
float destx = SpaceExplorer.RandomInt((int)player.X - box, (int)player.X + box);
float desty = SpaceExplorer.RandomInt((int)player.Y - box, (int)player.Y + box);
enemy.destination = new Entity(destx, desty, 90, 90);
}
else if (enemy.destination != null)
{
// point at destination
enemy.Rot = (float)Math.Atan2((enemy.Y + (HEIGHT / 2)) - enemy.destination.Y, (enemy.X + (WIDTH / 2)) - enemy.destination.X);
enemy.Xv = -(float)Math.Cos(enemy.Rot) * SPEED;
enemy.Yv = -(float)Math.Sin(enemy.Rot) * SPEED;
if (enemy.Collide(enemy.destination))
{
enemy.destination = null;
enemy.Xv = 0.0f;
enemy.Yv = 0.0f;
enemy.waitTimer = SpaceExplorer.RandomInt(50, 70);
}
}
}
++i;
}
}
