private void CheckIfCollide()
{
var currentVec = Instance.GetLinearVelocity();
if (currentVec.Length() - m_lastVelocity.Length() <= -6 ||
MathExtension.Diff(Instance.GetAngle(), m_lastAngle) >= MathExtension.OneDeg * 3 ||
TotalDistanceTraveled >= 15 && currentVec.Length() <= 1)
{
TargetedObject = Game.GetObjectsByArea(Instance.GetAABB())
.Where(o => o.UniqueID != Instance.UniqueID && ScriptHelper.IsInteractiveObject(o))
.FirstOrDefault();
if (TargetedObject != null)
{
m_timeElasped = Game.TotalElapsedGameTime;
TargetedPlayer = ScriptHelper.CastPlayer(TargetedObject);
if (TargetedPlayer != null)
{
Instance.SetBodyType(BodyType.Static);
m_relPlayerPosition = TargetedPlayer.GetWorldPosition() - Instance.GetWorldPosition();
}
else
{
m_weldJoint = (IObjectWeldJoint)Game.CreateObject("WeldJoint");
m_weldJoint.SetWorldPosition(Instance.GetWorldPosition());
m_weldJoint.SetTargetObjects(new List <IObject>()
{
Instance, TargetedObject
});
}
}
}
m_lastVelocity = currentVec;
m_lastAngle = Instance.GetAngle();
}
protected override void Update(float elapsed)
{
base.Update(elapsed);
if (TargetedObject == null)
{
CheckIfCollide();
}
if (TargetedObject != null)
{
Game.DrawArea(TargetedObject.GetAABB(), Color.Red);
}
if (TargetedPlayer != null)
{
if (TargetedPlayer.IsOnGround)
{
if (m_weldJoint != null)
{
Instance.SetBodyType(BodyType.Static);
m_weldJoint.Remove();
m_weldJoint = null;
}
if (TargetedPlayer.IsCrouching)
{
Instance.SetWorldPosition(TargetedPlayer.GetWorldPosition() - m_relPlayerPosition - Vector2.UnitY * 5);
}
else if (TargetedPlayer.IsRolling)
{
Instance.SetWorldPosition(TargetedPlayer.GetAABB().Center);
}
else
{
Instance.SetWorldPosition(TargetedPlayer.GetWorldPosition() - m_relPlayerPosition);
}
}
else if (TargetedPlayer.IsInMidAir) // cannot track position accurately when player is in mid air
{
if (m_weldJoint == null)
{
Instance.SetBodyType(BodyType.Dynamic);
m_weldJoint = (IObjectWeldJoint)Game.CreateObject("WeldJoint");
m_weldJoint.SetWorldPosition(Instance.GetWorldPosition());
m_weldJoint.SetTargetObjects(new List <IObject>()
{
Instance, TargetedPlayer
});
}
}
}
if (m_timeElasped != 0 && ScriptHelper.IsElapsed(m_timeElasped, 2000))
{
if (m_weldJoint != null)
{
m_weldJoint.Remove();
}
DealExplosionDamage();
Instance.Destroy();
}
}
