public override void Update(GameTime gametime)
{
switch (rocketState)
{
case ROCKETSTATE.STILL:
this.Visible = false;
explosion.Visible = false;
break;
// Using Lerp here could use target - pos and normalise for direction and then apply
// Velocity
case ROCKETSTATE.FIRING:
this.Visible = true;
position = Vector2.SmoothStep(position, Target, 0.02f * RocketVelocity);
if (Vector2.Distance(position, Target) < 20)
rocketState = ROCKETSTATE.EXPOLODING;
break;
case ROCKETSTATE.EXPOLODING:
Visible = false;
explosion.position = Target;
explosion.Visible = true;
break;
}
// if the explosion is visible then just play the animation and count the timer
if (explosion.Visible)
{
explosion.Update(gametime);
ExplosionTimer += gametime.ElapsedGameTime.Milliseconds;
}
// if the timer goes off the explosion is finished
if (ExplosionTimer > ExplosionVisibleLimit)
{
explosion.Visible = false;
ExplosionTimer = 0;
rocketState = ROCKETSTATE.STILL;
}
base.Update(gametime);
}
public void fire(Vector2 SiteTarget)
{
if (rocketState == ROCKETSTATE.STILL)
{
rocketState = ROCKETSTATE.FIRING;
Target = SiteTarget;
Vector2 direction = position - Target;
//direction.Normalize(); // Magnitude does not matter for angle calculation
angleOfRotation = (float)Math.Atan2(direction.Y, direction.X);
}
}