public override List <ActorObj> CalculationHit(SkillData skilldata, GTargetInfo targetInfo)
{
float minDis = skilldata.MSV_AreaParam1 / 10.0f;
float maxDis = skilldata.MSV_AreaParam2 / 10.0f;
int angle = skilldata.MSV_AreaParam3;
Vector3 pos = skilldata.IsAreaUseTarPos() ? targetInfo.m_vTarPos : targetInfo.m_vSrcPos;
Vector3 dir = targetInfo.m_vAimDir;
SSector sSector = new SSector(pos, dir, maxDis, minDis, angle);
List <ActorObj> pActorList = ActorMgr.GetAllActor();
if (pActorList.Count <= 0)
{
return(null);
}
List <ActorObj> list = new List <ActorObj>();
foreach (ActorObj actor in pActorList)
{
if (actor == m_pLocalPlayer)
{
continue;
}
ActorObj obj = (ActorObj)actor;
if (obj.CollisionCom == null)
{
continue;
}
for (int i = 0; i < obj.CollisionCom.GetShapeCount(); i++)
{
SShapeData shp = obj.CollisionCom.GetShape(i);
if (shp != null)
{
SSphere sTarSphere = new SSphere(shp.Pos, shp.r);
if (GCollider.SectorCollideCheck(sSector, sTarSphere, dir))
{
list.Add(actor);
break;
}
}
}
}
return(list);
}
/// <summary>
/// 扇形判定
/// 共有三种分离轴
/// 1、扇形圆心和圆盘圆心的方向（扇形的圆弧部分）
/// 2、扇形两边的法线
/// 3、扇形三个顶点和圆盘圆心的方向
///
/// 1、先判断扇形与圆盘的方向
/// 2、计算圆盘圆心与扇形的最近点的向量 p
/// 3、计算当前圆心是否在扇形内部
/// 4、计算扇形左边半径是否与圆形相交
/// </summary>
/// <returns></returns>
public static bool SectorCollideCheck(SSector sSector, SSphere pTarget, Vector3 vDir)
{
Vector2 sSectorPos = new Vector2(sSector.pos.x, sSector.pos.z);
Vector2 sTargetPos = new Vector2(pTarget.pos.x, pTarget.pos.z);
vDir.Normalize();
Vector2 vAimDir = new Vector2(vDir.x, vDir.z);
Vector2 vOpAimDir = new Vector2(-vDir.z, vDir.x);
float angle = sSector.angle * 0.5f;
// 1. 如果扇形圆心和圆盘圆心的方向
Vector2 vOffest = sTargetPos - sSectorPos;
if (vOffest.sqrMagnitude >= (sSector.r_max + pTarget.r) * (sSector.r_max + pTarget.r))
{
return(false);
}
if (vOffest.sqrMagnitude <= (sSector.r_min - pTarget.r) * (sSector.r_min - pTarget.r))
{
return(false);
}
// 2. 计算出扇形局部空间的 p
float px = Vector2.Dot(vOffest, vAimDir);
float py = Mathf.Abs(Vector2.Dot(vOffest, vOpAimDir)); //取仅为第一\二象限的情况化简难度
// 3. 如果 p_x > ||p|| cos theta，两形状相交 当前圆心在扇形内部
if (px > vOffest.magnitude * Mathf.Cos(angle))
{
return(true);
}
// 4. 求左边线段与圆盘是否相交
Vector2 q = sSector.r_max * new Vector2(Mathf.Cos(angle), Mathf.Sin(angle)); //得到扇形左边坐标
Vector2 p = new Vector2(px, py); //得到扇形与圆形相对坐标
//计算出左边线段与圆盘的分离轴，之后通过长度对比即可
float t = Vector2.Dot(p - Vector2.zero, q) / q.sqrMagnitude;
float length = (p - (Vector2.zero + Mathf.Clamp(t, 0, 1) * q)).sqrMagnitude;
return(length <= pTarget.r * pTarget.r);
}
