public override bool Update(GameTime CurrTime)
{
Vector2 MyCenter, TargetCenter, Speed;
float Distance;
MyCenter.X = TopLeft.X + (Width / 2);
MyCenter.Y = TopLeft.Y + (Height / 2);
TargetCenter = TargetObject.GetCenterCoordinates();
Rotation = MGMath.GetAngleFromPoints(MyCenter, TargetCenter, true);
Distance = MGMath.SquaredDistanceBetweenPoints(MyCenter, TargetCenter);
if ((Distance >= MaxDistanceFromTarget * MaxDistanceFromTarget) && (cStrafeDirection != 0)) //Too far away get closer
{
Speed = MGMath.CalculateXYMagnitude(Rotation, 3);
cStrafeDirection = 0;
}
else if ((Distance >= (MaxDistanceFromTarget * MaxDistanceFromTarget * 0.8f * 0.8f)) && (cStrafeDirection == 0)) //If moving forward overshoot a bit
{
Speed = MGMath.CalculateXYMagnitude(Rotation, 3);
}
else if (Distance <= MinDistanceFromTarget * MinDistanceFromTarget) //Too close back away
{
Speed = MGMath.CalculateXYMagnitude(Rotation + 3.14f, 3);
cStrafeDirection = 0;
}
else if ((Distance <= MinDistanceFromTarget * MinDistanceFromTarget * 1.2f * 1.2f) && (cStrafeDirection == 0)) //If backing away overshoot a bit
{
Speed = MGMath.CalculateXYMagnitude(Rotation + 3.14f, 3);
}
else //Close enough, circle
{
if (cStrafeDirection == 0)
{
if (cRand.Next(1, 3) == 1)
{
cStrafeDirection = -1;
}
else
{
cStrafeDirection = 1;
}
}
Speed = MGMath.CalculateXYMagnitude(Rotation + 1.57f, 2);
Speed.X *= cStrafeDirection;
Speed.Y *= cStrafeDirection;
}
SpeedX = (SpeedX + Speed.X) / 2;
SpeedY = (SpeedY + Speed.Y) / 2;
TopLeft.X += SpeedX;
TopLeft.Y -= SpeedY;
if (cLastShot == 0)
{
cLastShot = CurrTime.TotalGameTime.TotalMilliseconds + 1500 + cRand.Next(1000);
}
if (cLastShot < CurrTime.TotalGameTime.TotalMilliseconds)
{
Vector2 BulletOrigin;
BulletOrigin.Y = TopLeft.Y + (Height / 2);
BulletOrigin.X = TopLeft.X + (Height / 2);
Rotation += (float)(cRand.Next(-10, 10) * (Math.PI / 180.0)); //Randmize the direction so that it's not perfect (+/- 10 degrees)
BulletManager.AddParticle(BulletTexture, BulletOrigin.Y - 10, BulletOrigin.X - 10, 20, 20, Rotation, 8, new Color(255, 75, 75, 255));
cLastShot = CurrTime.TotalGameTime.TotalMilliseconds + 1500 + cRand.Next(1000);
}
return(true);
}
