public float GetAimDir()
{
//get the player position so we can aim at that little fucker
System.Diagnostics.Debug.Assert(null != MyBulletManager);
Vector2 shipPos = MyBulletManager.PlayerPosition(this);
//TODO: this function doesn't seem to work... bullets sometimes just spin around in circles?
//get the angle at that dude
float val = Mathf.Atan2((shipPos.x - X), -(shipPos.y - Y));
return val;
}
private float GetDirection(Bullet bullet)
{
//How do we want to change direction?
float delta = 0.0f;
switch (ChangeType)
{
case ENodeType.sequence:
{
//We are going to add this amount to the direction every frame
delta = NodeDirection;
}
break;
case ENodeType.absolute:
{
//We are going to go in the direction we are given, regardless of where we are pointing right now
delta = NodeDirection - bullet.Direction;
}
break;
case ENodeType.relative:
{
//The direction change will be relative to our current direction
delta = NodeDirection;
}
break;
default:
{
//the direction change is to aim at the enemy
delta = ((NodeDirection + bullet.GetAimDir()) - bullet.Direction);
}
break;
}
//keep the direction between -180 and 180
delta = MathHelper.WrapAngle(delta);
//The sequence type of change direction is unaffected by the duration
if (ChangeType == ENodeType.relative)
{
//Divide by the duration so we ease into the direction change
delta /= Duration;
}
//The sequence type of change direction is unaffected by the duration
else if (ChangeType != ENodeType.sequence)
{
//divide by the amount fo time remaining
delta /= Duration - RunDelta;
}
return(delta);
}