public override void Update(FrameTick elapsedTime)
{
Loc movediff = Destination - CurPos;
int movelen = movediff.Length();
//Get the difference between the current position and destination
double x = movediff.X / Math.Sqrt(movediff.DistSquared());
double y = movediff.Y / Math.Sqrt(movediff.DistSquared());
//Ignore translation on a given axis if its already at the correct position on that axis.
// Mainly because we're rounding the values to the nearest integer, and might overshoot otherwise.
if (movediff.X == 0)
{
x = 0;
}
if (movediff.Y == 0)
{
y = 0;
}
//Convert the floating point number to the biggest nearby integer value, and keep its sign
Loc movevec = new Loc();
movevec.X = (int)(Math.Ceiling(Math.Abs(x)) * Math.Sign(x));
movevec.Y = (int)(Math.Ceiling(Math.Abs(y)) * Math.Sign(y));
Loc checkedmove = new Loc();
//Constrain the move vector components to the components of the position difference vector to
// ensure we don't overshoot because of the move rate
checkedmove.X = Math.Min(Math.Abs(movediff.X), Math.Abs(movevec.X * moveRate)) * Math.Sign(movevec.X);
checkedmove.Y = Math.Min(Math.Abs(movediff.Y), Math.Abs(movevec.Y * moveRate)) * Math.Sign(movevec.Y);
//Update facing direction. Ignore none, since it crashes the game.
Dir8 newdir = movevec.ApproximateDir8();
if (newdir != Dir8.None)
{
CharDir = newdir;
}
Move = checkedmove;
CurPos += Move; //Increment our internal current position, since we have no ways of knowing where we are otherwise..
}
