Unit GetNearestEnemy(Point2 from, Player enemyPlayer, double stage, out Point2 point)
{
Unit ret = null;
point = new Point2();
double minDist = double.MaxValue;
for (int i = 0; i < Const.NumberOfLines; i++)
{
Unit enemyUnit = enemyPlayer.Units[i];
if (enemyUnit == null || enemyUnit.AtBase() || enemyUnit.State == UnitState.Dead)
{
continue;
}
Point2 temp = new Point2(enemyUnit.GetNextCoordinateXWithStage(stage),
Const.FieldOriginY + Const.TileHeight * (i + 0.5));
if (from.DistTo(temp) < minDist)
{
minDist = from.DistTo(temp);
point = temp;
ret = enemyUnit;
}
}
return(ret);
}
double?GetAngleToNearestEnemy(Unit unit, int line, Player enemyPlayer, double stage)
{
Point2 from = new Point2(unit.GetNextCoordinateXWithStage(stage),
Const.FieldOriginY + Const.TileHeight * (line + 0.5));
Point2 to;
Unit enemyUnit = GetNearestEnemy(from, enemyPlayer, stage, out to);
if (enemyUnit == null)
{
return(null);
}
double time = from.DistTo(to) / (Const.ProjectileSpeed * Const.TileWidth);
to.x = enemyUnit.GetNextCoordinateXWithStage(stage + time);
double angle_to = from.angleTo(to);
if ((unit.Owner == OwnerType.Player1 && from.x > to.x) ||
(unit.Owner == OwnerType.Player2 && from.x <= to.x))
{
angle_to -= 180;
}
if (angle_to < -180)
{
angle_to += 360;
}
double ret_angle = (angle_to - unit.CurrAngle);
ret_angle = Utility.LimitAngle(ret_angle);
return(ret_angle);
}
public static Point2 GetShellFinishPoint(Point2 startPoint, Point2 aimCurrentPoint, bool aimGoesToTheLeft)
{
double shellSpeed = Const.ProjectileSpeed * Const.TileWidth;
double d = aimGoesToTheLeft ? -1 : 1;
//подберем время, через которое юнит и снаряд окажутся в одной точке
double l = 0, r = 1000;
Point2 aimPos = new Point2();
while (r - l > 0.0001)
{
double mid = (r + l) / 2;
aimPos = new Point2(
aimCurrentPoint.x + d * mid,
aimCurrentPoint.y
);
double shellDistance = startPoint.DistTo(aimPos);
double timeShellReachesAim = shellDistance / shellSpeed;
if (mid < timeShellReachesAim) // т е цель доедет до места встречи раньше, чем снаряд долетит. Время нужно увеличить
{
l = mid;
}
else
{
r = mid;
}
}
return(aimPos);
}
