/// <summary>
/// True if the node has any blocked connections.
/// For 4 and 8 neighbours the 4 axis aligned connections will be checked.
/// For 6 neighbours all 6 neighbours will be checked.
///
/// Internal method used for erosion.
/// </summary>
///
bool HandingErosionOfOfAnyFalseConnections(GridGraphNode node)
{
// Check the 6 hexagonal connections
if (neighbours == NeighboursNumType.Six)
{
for (int i = 0; i < 6; i++)
{
if (!HasConnectionOfNode(node, hexagonNeighbourNodeIndices[i]))
{
return(true);
}
}
}
else
{
// Check the four axis aligned connections
for (int i = 0; i < 4; i++)
{
if (!HasConnectionOfNode(node, i))
{
return(true);
}
}
}
return(false);
}
/// <summary>
/// 处理单个节点的图层冲突信息
/// </summary>
/// <param name="node"></param>
/// <param name="x"></param>
/// <param name="z"></param>
public void HandingCollisonOfSingleNode(GridGraphNode node, int width, int depth)
{
float offestNum = 0.5f;
node.position = (Int3)(Matrix.MultiplyPoint3x4(new Vector3(width + offestNum, 0, depth + offestNum)));
bool walkAble = false;
RaycastHit hitInfo;
//处理高度和坡度检查
Vector3 position = graphicCollision.CheckHeight((Vector3)node.position, out hitInfo, out walkAble);
node.position = (Int3)position;
if (walkAble && graphicCollision.heightCheck)
{
if (hitInfo.normal != Vector3.zero)
{
float angle = Vector3.Dot(hitInfo.normal.normalized, graphicCollision.graphUp);
if (angle < Mathf.Cos(maxSlope * Mathf.Deg2Rad))
{
walkAble = false;
}
}
}
//检查障碍物
bool checkObstacles = graphicCollision.Check((Vector3)node.position);
node.walkAble = checkObstacles && walkAble;
// Debug.Log("ConvertedData::" + ConvertedData + ", x::" + x + ", z::" + z + ",node.walkAble::" + node.walkAble);
}
public override void OnDrawGizmos(bool drawFlag)
{
if (!drawFlag || nodes == null || nodes.Length != nodesInWidth * nodesInDepth)
{
return;
}
//绘制outLineBound
Gizmos.color = Color.white;
Gizmos.matrix = outLineBoundMatrix;
Gizmos.DrawWireCube(Vector3.zero, new Vector3(gridSize.x, 0, gridSize.y));
Gizmos.matrix = Matrix4x4.identity;
//绘制网格走可走区域
// Debug.Log("depth::" + nodesInDepth + ",width::" + nodesInWidth);
Gizmos.color = Color.green;
for (int depth = 0; depth < nodesInDepth; depth++)
{
for (int width = 0; width < nodesInWidth; width++)
{
var node = nodes[depth * nodesInWidth + width];
// Debug.Log("index::" + (depth * nodesInWidth + width) + "node::" + node.nodeIndex + ", depth::" + depth + ", width::" + width + ",node.walkAble::" + node.walkAble);
if (!node.walkAble)
{
continue;
}
Vector3 position = (Vector3)node.position;
for (int i = 0; i < 8; i++)
{
if (node.GetConnectionInternal(i))
{
GridGraphNode other = nodes[node.nodeIndex + neighbourNodeOffsets[i]];
Gizmos.DrawLine(position, (Vector3)other.position);
// Debug.Log("connect::" + other.nodeIndex + ".node::" + node.nodeIndex);
}
}
// Debug.Log("node::" + node.nodeIndex + ", depth::" + depth + ", width::" + width + ",node.walkAble::" + node.walkAble );
}
}
Gizmos.color = Color.blue;
for (int i = 0; i < nodes.Length; i++)
{
if (nodes[i].walkAble)
{
Gizmos.color = Color.red;
}
else
{
Gizmos.color = Color.gray;
}
Gizmos.DrawCube((Vector3)nodes[i].position, Vector3.one * 0.5f);
}
}
/// <summary>
/// 扫描图形内部
/// </summary>
public override void ScanGraphicInternal()
{
if (nodeSize <= 0) //默认设置为最小数值
{
nodeSize = 0.1f;
}
UpdateBaseArgs();
if (nodesInWidth > 1024)
{
Debug.LogError("the grid's sides(nodesInWidth) is longer than 1024 nodes!!");
return;
}
if (nodesInDepth > 1024)
{
Debug.LogError("the grid's sides(nodesInDepth) is longer than 1024 nodes!!");
return;
}
//设置偏移值和代价
SetValuesOfOffsetsAndCosts();
//设置当前当前的网格图层对象
GridGraphNode.SetGridNavGraph(this.graphIndex, this);
if (nodes != null)
{
for (int i = 0; i < nodes.Length; i++)
{
nodes[i].Destory();
}
}
//创建节点
nodes = new GridGraphNode[nodesInWidth * nodesInDepth];
for (int i = 0; i < nodes.Length; i++)
{
nodes[i] = new GridGraphNode();
nodes[i].graphIndex = this.graphIndex;
nodes[i].nodeIndex = i;
}
//处理图形冲突,高度坡度检查、障碍物等
HandingGraphicCollision();
//处理节点间的连接
HandingNodesConnections();
//处理侵蚀的部分
ErosionNodeOfArea(0, 0, nodesInWidth, nodesInDepth);
}
public virtual bool IsValidConnection(GridGraphNode n1, GridGraphNode n2)
{
if (!n1.walkAble || !n2.walkAble)
{
return(false);
}
if (maxDiffPosition > 0 && Mathf.Abs(n1.position[useAxisOfMaxDiffPosition] - n2.position[useAxisOfMaxDiffPosition]) > maxDiffPosition * Int3.Precision)
{
return(false);
}
return(true);
}
/// <summary>
/// 查看节点是否有连接
/// </summary>
/// <param name="node"></param>
/// <param name="dir"></param>
/// <returns></returns>
public bool HasConnectionOfNode(GridGraphNode node, int dir)
{
if (!node.GetConnectionInternal(dir))
{
return(false);
}
if (node.EdgeNode)
{
//算出当前的index的行列
int nodeIndex = node.nodeIndex;
int depth = nodeIndex / nodesInWidth;
int width = nodeIndex - depth * nodesInWidth;
return(HasConnectionOfNode(nodeIndex, width, depth, dir));
}
else
{
return(true);
}
}
bool HandingErosionOfOfAnyFalseConnections(GridGraphNode node)
{
if (neighbours != NeighboursNumType.Six)
{
for (int i = 0; i < 4; i++)
{
if (!HasConnectionOfNode(node, i))
{
return(true);
}
}
}
else
{
for (int i = 0; i < 6; i++)
{
if (!HasConnectionOfNode(node, hexagonNeighbourNodeIndices[i]))
{
return(true);
}
}
}
return(false);
}
public void HandingCollisonOfSingleNode(GridGraphNode[] nodes, int width, int depth, GridGraphNode node)
{
node.ResetConnectionsInternal();
//All connections are disabled if the node is not walkable
if (!node.walkAble)
{
return;
}
int index = node.nodeIndex;
if (neighbours == NeighboursNumType.Four || neighbours == NeighboursNumType.Eight)
{
// Reset the buffer
if (buffers == null)
{
buffers = new int[4];
}
else
{
for (int i = 0; i < 4; i++)
{
buffers[i] = 0;
}
}
for (int i = 0, j = 3; i < 4; j = i, i++)
{
int nx = width + neighbourNodeXOffsets[i];
int nz = depth + neighbourNodeZOffsets[i];
if (nx < 0 || nz < 0 || nx >= nodesInWidth || nz >= nodesInDepth)
{
continue;
}
var other = nodes[index + neighbourNodeOffsets[i]];
if (IsValidConnection(node, other))
{
node.SetConnectionInternal(i, true);
// Mark the diagonal/corner adjacent to this connection as used
buffers[i]++;
buffers[j]++;
}
else
{
node.SetConnectionInternal(i, false);
}
}
// Add in the diagonal connections
if (neighbours == NeighboursNumType.Eight)
{
if (cutCornersOfObstacles)
{
for (int i = 0; i < 4; i++)
{
// If at least one axis aligned connection
// is adjacent to this diagonal, then we can add a connection
if (buffers[i] >= 1)
{
int nx = width + neighbourNodeXOffsets[i + 4];
int nz = depth + neighbourNodeZOffsets[i + 4];
if (nx < 0 || nz < 0 || nx >= width || nz >= depth)
{
continue;
}
GridGraphNode other = nodes[index + neighbourNodeOffsets[i + 4]];
node.SetConnectionInternal(i + 4, IsValidConnection(node, other));
}
}
}
else
{
for (int i = 0; i < 4; i++)
{
// If exactly 2 axis aligned connections is adjacent to this connection
// then we can add the connection
//We don't need to check if it is out of bounds because if both of the other neighbours are inside the bounds this one must be too
if (buffers[i] == 2)
{
GridGraphNode other = nodes[index + neighbourNodeOffsets[i + 4]];
node.SetConnectionInternal(i + 4, IsValidConnection(node, other));
}
}
}
}
}
else
{
// Hexagon layout
// Loop through all possible neighbours and try to connect to them
for (int j = 0; j < hexagonNeighbourNodeIndices.Length; j++)
{
var i = hexagonNeighbourNodeIndices[j];
int nx = width + neighbourNodeXOffsets[i];
int nz = depth + neighbourNodeZOffsets[i];
if (nx < 0 || nz < 0 || nx >= width || nz >= depth)
{
continue;
}
var other = nodes[index + neighbourNodeOffsets[i]];
node.SetConnectionInternal(i, IsValidConnection(node, other));
}
}
}