IsPosReachable

    //BUG: Sometimes this function will return true for a position that is over a tall ledge (e.g a bridge).
    //Checks if the straight line between the callers' position and the specified position can be walked up to.
    //TargetPos: The position to check if it's walkable.
    /*DistCutoff: The amount of map units to trim off the distance between the callers' pos and TargetPos. Useful for subtracting the radius of another actor,
    so that if you are checking if a position to another actor can be reached, the check doesn't return false because the actor itself is in the way !*/
    Bool IsPosReachable (Vector3 TargetPos, Double DistCutoff = 0)
    {
        Vector3 OldPos = Pos;
        Bool Interp = bDontInterpolate;
        Vector2 Path = Level.Vec2Diff( Pos.XY, TargetPos.XY );
        Double Distance = Path.Length()-DistCutoff;
        Double Spacing = Radius*2;
        If (Distance <= 1) Return False;
        Path /= Distance;

        bDontInterpolate = True; //No movement interpolation during the test.
        For (Int I = 0; I < Distance; I += Spacing)
        {
            If (Level.Vec2Diff (Pos.XY, OldPos.XY).Length() >= Distance) Break; //The check went further than the distance to the target position. Success
            Else If (Level.Vec2Diff (Pos.XY, TargetPos.XY).Length() <= Radius*2.5) Break; //The caller is with 2.5 radii of the target position. Success
            //Run as many times as it takes between you and your destination.
            FCheckPosition Data;
            If (TryMove (Level.Vec2Offset(OldPos.XY, Path*I), 1, tm:Data))
                {SetZ (GetZAt (Pos.X,Pos.Y,flags:GZF_ABSOLUTEPOS));/* spawn ("candlestick",pos);*/} //Update the actors' Z position. TryMove should do that internally, but it doesn't. GZDoom moment.
            //If one of them fails, then return false.
            Else
            {//a_log ("i can't head here");
                bDontInterpolate = Interp;
                SetOrigin (OldPos,False);
                Return False;
            }
        }//a_log ("valid path");
        bDontInterpolate = Interp;
        SetOrigin (OldPos,False);
        Return True; //No TryMove call returned false.
    }