Esempio n. 1
0
        /// <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 * Mathf.Deg2Rad;

            // 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);
        }
Esempio n. 2
0
        public override List <Avatar> GetTargetList(DRSkillData pSkillData,
                                                    Avatar pCaster, GTargetInfo sTarInfo, HashSet <int> vExcludeList)
        {
            List <Avatar> vTargetList = new List <Avatar>();

            if (pSkillData == null || !pCaster)
            {
                return(vTargetList);
            }
            Avatar pTarget = GameEntry.Entity.GetGameEntity(sTarInfo.m_nTargetID) as Avatar;

            if (!pTarget)
            {
                pTarget = pCaster;
            }

            int   cnt    = GetTargetCount(pSkillData /*, vExcludeList*/);
            int   filter = pSkillData.MSV_AreaFilter;
            float minDis = pSkillData.MSV_AreaParam1;
            float maxDis = pSkillData.MSV_AreaParam2;
            float angle  = pSkillData.MSV_AreaParam3;

            List <UnityGameFramework.Runtime.Entity> pList = new List <UnityGameFramework.Runtime.Entity>();

            GameEntry.Entity.GetAllLoadedEntities(pList);
            if (pList == null || pList.Count == 0)
            {
                return(vTargetList);
            }
            Vector3 pos = /*pSkillData.IsAreaUseTarPos() ? sTarInfo.m_vTarPos :*/ sTarInfo.m_vSrcPos;
            Vector3 dir = sTarInfo.m_vAimDir;

            SSector sSector = new SSector(pos, dir, maxDis, minDis, angle);

            foreach (var item in pList)
            {
                Avatar actor = item.Logic as Avatar;
                if (actor == null || actor == pCaster)
                {
                    continue;
                }
                SSphere sTarSphere = new SSphere(actor.GetPos(), actor.ModelRadius);
                if (GCollider.SectorCollideCheck(sSector, sTarSphere, dir))
                {
                    TryAddTarget(pSkillData, pCaster, actor, vExcludeList);
                    if (vTargetList.Count >= cnt)
                    {
                        if (filter > 0)
                        {
                            UpdateAreaFilter(filter, cnt, vTargetList);
                        }
                        else
                        {
                            return(vTargetList);
                        }
                    }
                    break;
                }
            }
            return(vTargetList);
        }