private void BuildGridMesh()
{
int vertNodesIndex = 0;
int triNodesIndex = 0;
int vertConnectionsIndex = 0;
int triConnectionsIndex = 0;
// get the references to the mesh stuff
Vector3[] nodesVerts = nodesMeshInfo.Vertices;
Color[] nodesCols = nodesMeshInfo.Colors;
int[] nodesTris = nodesMeshInfo.Triangles;
Mesh nodesMesh = nodesMeshInfo.Mesh;
Vector3[] connectionsVerts = connectionsMeshInfo.Vertices;
Color[] connectionsCols = connectionsMeshInfo.Colors;
int[] connectionsTris = connectionsMeshInfo.Triangles;
Mesh connectionsMesh = connectionsMeshInfo.Mesh;
// calculate half the width of the line that represents the neighbor connections
float lineWidthRadius = connectionsWidthFactor * nodeRadius;
for (int i = 0; i < numRows; i++)
{
for (int j = 0; j < numCols; j++)
{
GridNode n = Nodes[i, j];
// first we set up the quads corresponding to the node visual representation
Vector3 v1 = n.Pos + (Vector3.left + Vector3.back) * NodeDebugRadius;
Vector3 v2 = n.Pos + (Vector3.right + Vector3.back) * NodeDebugRadius;
Vector3 v3 = n.Pos + (Vector3.left + Vector3.forward) * NodeDebugRadius;
Vector3 v4 = n.Pos + (Vector3.right + Vector3.forward) * NodeDebugRadius;
Color col = n.Walkable ? walkableNodeColor : unwalkableNodeColor;
nodesVerts[vertNodesIndex] = v1;
nodesVerts[vertNodesIndex + 1] = v2;
nodesVerts[vertNodesIndex + 2] = v3;
nodesVerts[vertNodesIndex + 3] = v4;
nodesCols[vertNodesIndex] = col;
nodesCols[vertNodesIndex + 1] = col;
nodesCols[vertNodesIndex + 2] = col;
nodesCols[vertNodesIndex + 3] = col;
nodesTris[triNodesIndex++] = vertNodesIndex;
nodesTris[triNodesIndex++] = vertNodesIndex + 2;
nodesTris[triNodesIndex++] = vertNodesIndex + 1;
nodesTris[triNodesIndex++] = vertNodesIndex + 2;
nodesTris[triNodesIndex++] = vertNodesIndex + 3;
nodesTris[triNodesIndex++] = vertNodesIndex + 1;
vertNodesIndex += 4;
// now we set up the connections to the neighbors
for (int k = 0; k < n.Neighbors.Length; k++)
{
GridNode neighbor = n.Neighbors[k];
if (neighbor == null)
{
continue;
}
Vector3 offsetToNeighbor = neighbor.Pos - n.Pos;
Vector3 left = Vector3.Cross(offsetToNeighbor, -cam.transform.forward).normalized *lineWidthRadius;
v1 = n.Pos + left + NodeDebugConnectionsUp;
v2 = n.Pos - left + NodeDebugConnectionsUp;
v3 = n.Pos + left + offsetToNeighbor + NodeDebugConnectionsUp;
v4 = n.Pos - left + offsetToNeighbor + NodeDebugConnectionsUp;
connectionsVerts[vertConnectionsIndex] = v1;
connectionsVerts[vertConnectionsIndex + 1] = v2;
connectionsVerts[vertConnectionsIndex + 2] = v3;
connectionsVerts[vertConnectionsIndex + 3] = v4;
connectionsCols[vertConnectionsIndex] = connectionsColor;
connectionsCols[vertConnectionsIndex + 1] = connectionsColor;
connectionsCols[vertConnectionsIndex + 2] = connectionsColor;
connectionsCols[vertConnectionsIndex + 3] = connectionsColor;
connectionsTris[triConnectionsIndex++] = vertConnectionsIndex;
connectionsTris[triConnectionsIndex++] = vertConnectionsIndex + 2;
connectionsTris[triConnectionsIndex++] = vertConnectionsIndex + 1;
connectionsTris[triConnectionsIndex++] = vertConnectionsIndex + 2;
connectionsTris[triConnectionsIndex++] = vertConnectionsIndex + 3;
connectionsTris[triConnectionsIndex++] = vertConnectionsIndex + 1;
vertConnectionsIndex += 4;
}
}
}
nodesMeshInfo.SetMesh();
nodesMeshInfo.Recalculate();
connectionsMeshInfo.SetMesh();
connectionsMeshInfo.Recalculate();
}