/// <summary>
/// 2D扇形与2D点碰撞检测
/// (x－a)²+(y－b)²=r²
/// </summary>
/// <returns><c>true</c>, if d sector2 d was point2ed, <c>false</c> otherwise.</returns>
/// <param name="targetV">目标点坐标</param>
/// <param name="sectorV">扇形中心点坐标</param>
/// <param name="sectorDir">扇形中心线朝向</param>
/// <param name="sectorAngle">扇形张开角度(1/2,比如张开是60度，这里就是30)</param>
/// <param name="sectorR">扇形半径</param>
public static bool Point2D_Sector2D(Vector2 targetV, Vector2 sectorV, Vector2 sectorDir, int sectorAngle, float sectorR)
{
//判定距离,以点targetV.x画一条垂直于x轴的线，如果跟圆方程有两个解就是圆内部，反之圆外部
//根据圆方程，r2-x2如果大于等于0说明y有两个值，反之没值，点不在圆内
float x2 = sectorV.x - targetV.x;
x2 = x2 * x2;
float r2 = sectorR * sectorR;
if (r2 - x2 < 0)
{
return(false);
}
// float dis = Vector2.Distance(targetV,sectorV);
// if (dis > sectorR * sectorR)
// return false;
//判定角度
Vector2 vSector2Target = targetV - sectorV;
vSector2Target.Normalize();
float n = Vector2.Dot(vSector2Target, sectorDir);
if (n > MathsTool.Cos(sectorAngle))
{
return(false);
}
return(true);
}
public float GetCameraEulerY()
{
return(MathsTool.Limit2_360Degree(transform.localEulerAngles.y));
}
