public static Vector2 GetPosition(Vector2 start, Vector2 toGoal, float radius, Entity source)
{
float range = toGoal.Length();
toGoal.Normalize();
if(range == 0)
{
return start;
}
#region Standard method
Vector2 curGoal = start + toGoal * (range + radius);
float standardRange = range;
if (_level.IsPixelAccessible((curGoal)))
{
return curGoal - toGoal * radius;
}
else
{
if (source != null)
{
Entity ent = _level.GetEntityAt(curGoal);
if (ent.Equals(source))
{
return curGoal;
}
ent.OnCollide(source);
if (!start.Equals(source.GetPosition()))
{
return source.GetPosition();
}
if (ent.CanBePickedUp())
{
return curGoal - toGoal * radius;
}
}
}
while (!_level.IsPixelAccessible((curGoal)))
{
if (standardRange > 1)
{
standardRange -= 1;
}
else
{
break;
}
curGoal = start + toGoal * (standardRange + radius);
if (_level.IsPixelAccessible((curGoal)))
{
return curGoal - toGoal * radius;
}
else
{
if (source != null)
{
Entity ent = _level.GetEntityAt(curGoal);
ent.OnCollide(source);
if (!start.Equals(source.GetPosition()))
{
return source.GetPosition();
}
if (ent.CanBePickedUp())
{
return curGoal - toGoal * radius;
}
}
}
}
#endregion
#region "Slide" method
if (Math.Abs(toGoal.X) > Math.Abs(toGoal.Y))
{
toGoal = new Vector2(toGoal.X, 0);
}
else
{
toGoal = new Vector2(0, toGoal.Y);
}
curGoal = start + toGoal * (range + radius);
while (!_level.IsPixelAccessible((curGoal)))
{
if (standardRange > 1)
{
standardRange -= 1;
}
else
{
return start;
}
curGoal = start + toGoal * (standardRange + radius);
}
#endregion
return curGoal - toGoal * radius;
}
public override void Update(GameTime gameTime)
{
_victim = (Game as Game1)._player;
Vector2 toPlayer = this._position - _victim.GetPosition();
#region Check state
if (toPlayer.LengthSquared() < Constants.GruselUte_SightRange * Constants.GruselUte_SightRange)
{
_state = AIstate.AGGRO;
}
else
{
_state = AIstate.IDLE;
}
switch (_state)
{
case AIstate.IDLE:
IdleBehavior(gameTime);
break;
case AIstate.AGGRO:
AggroBehavior(gameTime);
break;
default:
IdleBehavior(gameTime);
break;
}
#endregion
_cm.Update(gameTime);
base.Update(gameTime);
}