/// <summary>
///进行射线追踪
/// </summary>
/// <param name="ter">地形</param>
/// <param name="rxBall">接收球</param>
/// <param name="buildings">建筑物</param>
/// <param name="rayBeamAngle">射线束的夹角</param>
/// <returns>交点</returns>
public List <Node> GetCrossNodes(Terrain ter, ReceiveBall rxBall, City buildings, double rayBeamAngle)
{
//获取左右两条射线的追踪结果
List <Node> leftCrossNodes = new LineRay(this.leftRay, this.leftFatherNode).GetCrossNodes(ter, rxBall, buildings, rayBeamAngle);
List <Node> rightCrossNodes = new LineRay(this.rightRay, this.leftFatherNode).GetCrossNodes(ter, rxBall, buildings, rayBeamAngle);
//把结果放入Dictionary中
if (leftCrossNodes.Count == 0)
{
rayCrossNodes.Add(this.leftRay, null);
}
else
{
rayCrossNodes.Add(this.leftRay, leftCrossNodes[0]);
}
if (rightCrossNodes.Count == 0)
{
rayCrossNodes.Add(this.rightRay, null);
}
else
{
rayCrossNodes.Add(this.rightRay, rightCrossNodes[0]);
}
//
HandleCrossNodes(this.luanchRay, this.rayCrossNodes, ter, rxBall, buildings, rayBeamAngle);
//若射线面打到接收球上，其他交点舍去，不再追踪,同时把空的交点删去
List <Node> crossNodes = this.rayCrossNodes.Values.ToList();
for (int i = crossNodes.Count - 1; i >= 0; i--)
{
if (crossNodes[i] == null)//交点是null，删去
{
crossNodes.RemoveAt(i);
continue;
}
if (crossNodes[i].NodeStyle == NodeStyle.Rx)
{
return(new List <Node> {
crossNodes[i]
});
}
}
return(crossNodes);
}
/// <summary>
///在两条射线中间生成一条新的射线
/// </summary>
/// <param name="outRay">从射线面发出的射线</param>
/// <param name="rayCrossNode">射线与交点的dictionary</param>
/// <param name="ter">地形</param>
/// <param name="rxBall">接收球</param>
/// <param name="buildings">建筑物</param>
/// <param name="rayBeamAngle">射线束的夹角</param>
/// <returns></returns>
private void SetNewMiddleRay(List <RayInfo> outRay, Dictionary <RayInfo, Node> rayCrossNode, Terrain ter, ReceiveBall rxBall, City buildings, double rayBeamAngle, ref int i)
{
Point lineMiddlePoint = rayCrossNode[outRay[i]].Position.GetMiddlePointInTwoPoints(rayCrossNode[outRay[i + 1]].Position);
RayInfo newRay = new RayInfo(this.launchPoint, lineMiddlePoint);
Node lineNode = this.GetLineNode(newRay);
List <Node> newCrossNode = new LineRay(newRay, lineNode).GetCrossNodes(ter, rxBall, buildings, rayBeamAngle);
if (newCrossNode.Count == 0)
{
rayCrossNode.Add(newRay, null);
}
else
{
rayCrossNode.Add(newRay, newCrossNode[0]);
this.lineNodes.Add(newCrossNode[0], lineNode);
}
outRay.Insert(i + 1, newRay);
i--;
}