/// <summary>
/// Adds a step to the queue internally.
/// </summary>
/// <param name="x">X coordinate of step.</param>
/// <param name="y">Y coordinate of step.</param>
private void AddStepInternal(short x, short y)
{
// Check to see if the current count of queues overflows the capacity limit.
if (this.writePosition >= WalkingQueue.Capacity)
{
/*
* The character most likely is a bot, cause
* normal characters cannot reach this limit.
*/
return;
}
// Get differences.
short diffX = (short)(x - this.points[this.writePosition - 1].X);
short diffY = (short)(y - this.points[this.writePosition - 1].Y);
// Caclulate direction from differences.
sbyte direction = DirectionUtilities.CalculateDirection(diffX, diffY);
// We only need to enqueue the point if the direction is valid.
if (direction > -1)
{
// Enqueue the calculated point.
this.points[this.writePosition++] = new MovementPoint(x, y, direction);
}
}
/// <summary>
/// Gets the next point.
/// </summary>
/// <returns>Returns the point's direction.</returns>
private sbyte GetNextPoint()
{
// Nothing to read.
if (this.readPosition == this.writePosition)
{
return(-1);
}
MovementPoint mp = points[this.readPosition++];
sbyte dir = DirectionUtilities.CalculateDirection(this.npc.Location.X, this.npc.Location.Y, mp.X, mp.Y);
/*
* You cannot search though an array with a negative number,
* so we must check if the direction is higher than -1.
*/
if (dir != -1)
{
dir >>= 1;
this.npc.Location = Location.Create(mp.X, mp.Y, this.npc.Location.Z);
}
return(dir);
}
