private void gameTimer_Tick(object sender, EventArgs e)
{
//rotate left
if (leftArrowDown)
{
if (hero.angle > -80)
{
hero.Turn("left");
}
}
//rotate right
if (rightArrowDown)
{
if (hero.angle < 80)
{
hero.Turn("right");
}
}
//spawn missile every 60 ticks
if (counter == Form1.difficulty)
{
//missile object requires float values to draw on screen
Missile m = new Missile(randGen.Next(10, this.Width - 10), 0, missileSize, missileSpeed);
missiles.Add(m);
//reset counter
counter = 0;
}
else
{
counter++;
}
//fire bullet
if (spaceDown && ammo > 0 && firecounter == 0)
{
//theta measure for angle of fire, (float uses less memory)
float thetaAngle = (90 - hero.angle);
// determine the end point for each hand (result must be a double)
double xStep = Math.Cos(thetaAngle * Math.PI / 180.0);
double yStep = Math.Sin(thetaAngle * Math.PI / 180.0);
//bullet object requires float values to draw on screen
Bullet b = new Bullet(hero.x, hero.y, bulletSize, bulletSpeed, (float)xStep, (float)-yStep);
bullets.Add(b);
//remove ammo
ammo--;
ammoLabel.Text = "Ammo: " + ammo.ToString();
//reset firecounter
firecounter = 0;
}
//move bullet
foreach (Bullet b in bullets)
{
b.Move();
}
//move missile
foreach (Missile m in missiles)
{
m.MissileMove();
}
if (bullets.Count > 0)
{
//Use the OffScreen method from the first bullet since we know it exists.
//bullets[0].OffScreen(bullets, this);
}
//remove missile and health when missile hits bottom of screen
foreach (Missile m in missiles)
{
if (m.y > this.Height)
{
lives--;
livesLabel.Text = lives.ToString();
missiles.RemoveAt(missiles.IndexOf(m));
break;
}
}
if (missiles.Count > 0)
{
//Use the OffScreen method from the first bullet since we know it exists.
missiles[0].OffScreen(missiles, this);
}
BulletsMissilesCollision();
//paint the screen
Refresh();
}