/// <summary>
/// 随机返回-1或者1
/// </summary>
/// <param name="luaState"></param>
/// <returns></returns>
public static int GetRandomSign(ILuaState luaState)
{
int ret = MTRandom.GetNextInt(0, 1);
luaState.PushNumber(ret == 0 ? -1 : 1);
return(1);
}
public static int GetRandomInt(ILuaState luaState)
{
int begin = luaState.ToInteger(-2);
int end = luaState.ToInteger(-1);
luaState.PushInteger(MTRandom.GetNextInt(begin, end));
return(1);
}
/// <summary>
/// 敌机在duration的持续时间内进行移动
/// <para>移动的目标地点以及方式在之前设置的范围、振幅、模式里面</para>
/// </summary>
/// <param name="duration"></param>
public virtual void DoWander(int duration)
{
// 记录移动方向是否有效的数组
List <int> availableDir = new List <int>();
int dir;
float minX, maxX, minY, maxY, toX, toY;
// 根据dirMode计算重新计算边界
Vector2 playerPos = Global.PlayerPos;
// 向左
if (_curPos.x - _wanderAmplitudeX.x >= _wanderRangeX.x)
{
availableDir.Add(0);
}
if (_curPos.x + _wanderAmplitudeX.x <= _wanderRangeX.y)
{
availableDir.Add(1);
}
if (availableDir.Count == 0)
{
toX = _curPos.x;
}
else
{
dir = MTRandom.GetNextInt(0, 1);
if (_dirMode == DirectionMode.MoveXTowardsPlayer || _dirMode == DirectionMode.MoveTowardsPlayer)
{
//往左移动
if (playerPos.x < _curPos.x)
{
dir = 0;
}
else
{
dir = 1;
}
if (availableDir.IndexOf(dir) == -1)
{
dir = 1 - dir;
}
}
else
{
dir = MTRandom.GetNextInt(0, availableDir.Count - 1);
}
// 左移动，计算左移动的最大值和最小值
if (dir == 0)
{
maxX = _curPos.x - _wanderAmplitudeX.x;
minX = _curPos.x - _wanderAmplitudeX.y < _wanderRangeX.x ? _wanderRangeX.x : _curPos.x - _wanderAmplitudeX.y;
}
else
{
minX = _curPos.x + _wanderAmplitudeX.x;
maxX = _curPos.x + _wanderAmplitudeX.y > _wanderRangeX.y ? _wanderRangeX.y : _curPos.x + _wanderAmplitudeX.y;
}
toX = MTRandom.GetNextFloat(minX, maxX);
}
// 计算Y的范围 0 = 下, 1 = 上
availableDir.Clear();
// 往下
if (_curPos.y - _wanderAmplitudeY.x >= _wanderRangeY.x)
{
availableDir.Add(0);
}
// 往上
if (_curPos.y + _wanderAmplitudeY.x <= _wanderRangeY.y)
{
availableDir.Add(1);
}
if (availableDir.Count == 0)
{
toY = _curPos.y;
}
else
{
if (_dirMode == DirectionMode.MoveYTowardsPlayer || _dirMode == DirectionMode.MoveTowardsPlayer)
{
//往下移动
if (playerPos.y < _curPos.y)
{
dir = 0;
}
else
{
dir = 1;
}
if (availableDir.IndexOf(dir) == -1)
{
dir = 1 - dir;
}
}
else
{
dir = MTRandom.GetNextInt(0, availableDir.Count - 1);
}
// 向下移动
if (dir == 0)
{
maxY = _curPos.y - _wanderAmplitudeY.x;
minY = _curPos.y - _wanderAmplitudeY.y < _wanderRangeY.x ? _wanderRangeY.x : _curPos.y - _wanderAmplitudeY.y;
}
else
{
minY = _curPos.y + _wanderAmplitudeY.x;
maxY = _curPos.y + _wanderAmplitudeY.y > _wanderRangeY.y ? _wanderRangeY.y : _curPos.y + _wanderAmplitudeY.y;
}
toY = MTRandom.GetNextFloat(minY, maxY);
}
MoveTo(toX, toY, duration, _wanderMode);
//Logger.Log("wander from " + _curPos + " to " + new Vector2(toX, toY));
}