//显示一个一开始沿直线运动进入屏幕，然后在屏幕某一点停住的敌人
/* prefab: 构造敌人用到的prefab
** count： 显示的敌人的数量
** birthPosition：敌人出现的位置
** anchorPoint：敌人停驻的位置
*/
private void ShowEnterAnchorEnemies(GameObject prefab, int count, Vector3 birthPosition, Vector3 anchorPoint, float speed = 1f, BulletType type = BulletType.LAZER_BULLET)
{
MovementArg arg = new MovementArg();
arg.positionArg = anchorPoint;
arg.speed = speed;
arg.bulletType = type;
arg.type = MovementType.ENTER_ANCHOR_MOVEMENT;
GenerateEnemyHelpr.GenerateEnterAnchorEnemies(prefab, count, birthPosition, arg, enemyParent, this);
}
//一下三个方法为创建并显示一个特定类型的敌人，包装后可以方便其他组员编写其各自的关卡逻辑
//显示一个运动路线为直线的敌人（水平，垂直或者斜线）
//根据birthPosition和direction可以确定运动的轨迹（两点确定一条直线）
/* prefab: 构造敌人用到的prefab
** count： 显示的敌人的数量
** birthPosition：敌人出现的位置
** direction: 敌人运动的方向，与birthPosition共同确定
*/
private void ShowLineMovementEnemies(GameObject prefab, int count, Vector3 birthPosition, Vector3 direction, float speed = 1f, BulletType type = BulletType.LAZER_BULLET)
{
MovementArg arg = new MovementArg();
arg.positionArg = direction;
arg.speed = speed;
arg.bulletType = type;
arg.type = MovementType.LINE_MOVEMENT;
GenerateEnemyHelpr.GenerateLineEnemies(prefab, count, birthPosition, arg, enemyParent, this);
}
//显示一个按照V字形运动的敌人：先直线进入屏幕，然后停住一段时间，然后再按照另一条直线离开屏幕
/* prefab: 构造敌人用到的prefab
** count： 显示的敌人的数量
** birthPosition：敌人出现的位置
** turningPoint: 敌人停驻的位置
** anchorTime：敌人停驻的时间长短
*/
private void ShowVeeMovementEnemies(GameObject prefab, int count, Vector3 birthPosition, Vector3 turningPoint, float anchorTime, float speed = 1f, BulletType type = BulletType.LAZER_BULLET)
{
MovementArg arg = new MovementArg();
arg.positionArg = turningPoint;
arg.anchorTime = anchorTime;
arg.speed = speed;
arg.bulletType = type;
arg.type = MovementType.VEE_MOVEMENT;
GenerateEnemyHelpr.GenerateVeeEnemies(prefab, count, birthPosition, arg, enemyParent, this);
}
