private static bool DrawSubGridHandle(SubGrid subGrid, SubGrid activeSubGrid, Color subGridColor)
{
Vector2Int subGridOriginPosition = subGrid.GetOriginCoordinate();
Vector3 subGridWorldPosition = subGrid.GetNavGrid().GetOriginWorldPosition() + new Vector3(subGridOriginPosition.x, 0, subGridOriginPosition.y);
Vector3[] vertexs =
{
subGridWorldPosition, //Bottom-Left
subGridWorldPosition + new Vector3(subGrid.Width, 0, 0), //Bottom-Right
subGridWorldPosition + new Vector3(subGrid.Width, 0, subGrid.Height), //Top-Right
subGridWorldPosition + new Vector3(0, 0, subGrid.Height) //Top-Left
};
Handles.DrawSolidRectangleWithOutline(vertexs, subGridColor, Color.black);
if (subGrid.Equals(activeSubGrid))
{
return(false);
}
float centerX = vertexs[0].x + ((vertexs[1].x - vertexs[0].x) / 2f);
float centerZ = vertexs[0].z + ((vertexs[3].z - vertexs[0].z) / 2f);
Vector3 centerPosition = new Vector3(centerX, vertexs[0].y, centerZ);
float buttonSize = 6f;
if (Handles.Button(centerPosition, Quaternion.LookRotation(Vector3.up), buttonSize, buttonSize, Handles.RectangleHandleCap))
{
return(true);
}
return(false);
}
private static void HandleNodeClick(SubGrid subGrid, Vector2Int nodeCoordinates)
{
//Get the active instance of NavGridTool and send it the NodeClick
NavGridTool navGridTool = (EditorWindow.GetWindow(typeof(NavGridTool)) as NavGridTool);
navGridTool.HandleNodeClick(nodeCoordinates);
}
public void DrawSubGrid(NavGridTool tool)
{
if (currentMode != Mode.EDIT)
{
return;
}
SubGrid selectedSubGrid = tool.SelectedSubGrid;
List <SubGrid> subGrids = selectedSubGrid.GetChildSubGrids();
//If the current SubGrid has child SubGrids
if (subGrids.Count > 0)
{
DrawSubGridHandle(selectedSubGrid, selectedSubGrid, SUBGRID_COLOR);
for (int i = 0; i < subGrids.Count; i++)
{
if (DrawSubGridHandle(subGrids[i], selectedSubGrid, SUBGRID_COLOR))
{
tool.SelectChildSubGrid(i);
return;
}
}
}
else
{
DrawNodeHandles(tool, selectedSubGrid);
}
}
//Splits the NavGrid into SubGrids for display purposes
//This is needed as drawing too many Handles at once slows down the editor
public static SubGrid CreateSubGrids(NavGrid navGrid, int nodeRenderLimit)
{
SubGrid primarySubGrid = new SubGrid(navGrid, null, new Vector2Int(), navGrid.Width, navGrid.Height);
GenerateSubGrids(primarySubGrid, navGrid, nodeRenderLimit);
return(primarySubGrid);
}
public void SelectChildSubGrid(int index)
{
if (index >= 0 && index < _selectedSubGrid.GetChildSubGrids().Count)
{
_selectedSubGrid = _selectedSubGrid.GetChildSubGrids()[index];
}
SceneView.RepaintAll();
}
public void RegenerateSubGrids()
{
if (currentNavGrid)
{
_selectedSubGrid = SubGridGenerator.CreateSubGrids(currentNavGrid, NODE_RENDER_LIMIT);
_selectedNode = NavGrid.NO_NODE;
SceneView.RepaintAll();
}
}
public SubGrid(NavGrid navGrid, SubGrid parent, Vector2Int originCoordinate, int width, int height)
{
this.navGrid = navGrid;
this.parent = parent;
this.originCoordinate = originCoordinate;
this.width = width;
this.height = height;
subGrids = new List <SubGrid>();
}
//Divides the provided subgrid using the provided devisions
private static List <SubGrid> DivideSubGrid(SubGrid currentSubGrid, NavGrid navGrid, Vector2 divisions)
{
int width = currentSubGrid.Width;
int height = currentSubGrid.Height;
List <SubGrid> newSubGrids = new List <SubGrid>();
float widthDivisions = divisions.x;
float heightDivisions = divisions.y;
Vector2Int originCoordinate = currentSubGrid.GetOriginCoordinate();
Vector2Int currentCoordinate = originCoordinate;
int xSize = Mathf.CeilToInt(width / widthDivisions);
int ySize = Mathf.CeilToInt(height / heightDivisions);
for (int y = 0; y < heightDivisions; y++)
{
//Correct ySize on the final row
if (y == heightDivisions - 1)
{
ySize = height - Mathf.RoundToInt(currentCoordinate.y - originCoordinate.y);
}
currentCoordinate.x = originCoordinate.x;
for (int x = 0; x < widthDivisions; x++)
{
SubGrid newSubGrid;
//Correct xSize on the final column
if (x == widthDivisions - 1)
{
newSubGrid = new SubGrid(navGrid, currentSubGrid, currentCoordinate, width - Mathf.RoundToInt(currentCoordinate.x - originCoordinate.x), ySize);
}
else
{
newSubGrid = new SubGrid(navGrid, currentSubGrid, currentCoordinate, xSize, ySize);
}
currentSubGrid.AddChildSubGrid(newSubGrid);
newSubGrids.Add(newSubGrid);
currentCoordinate.x += xSize;
}
currentCoordinate.y += ySize;
}
return(newSubGrids);
}
//Calculates how many times each side of the grid will be divided
private static Vector2 CalculateGridDivisions(SubGrid subGrid, int targetNumberOfSections, int maxHandlesPerFrame)
{
int width = subGrid.Width;
int height = subGrid.Height;
//If we only need 2 sections, divide the longest side
if (targetNumberOfSections == 2)
{
if (width > height)
{
return(new Vector2(2, 1));
}
else
{
return(new Vector2(1, 2));
}
}
else
{
Vector2 gridDivisions = new Vector2();
int divisor = Mathf.CeilToInt(Mathf.Sqrt(targetNumberOfSections));
//Calculate the shortest side first
if (width < height)
{
gridDivisions.x = CalculateSideDivisions(width, divisor, maxHandlesPerFrame);
//Calculate how many divisions are needed for the other side
if (gridDivisions.x != divisor)
{
divisor = Mathf.CeilToInt((targetNumberOfSections / (float)gridDivisions.x));
}
gridDivisions.y = Mathf.CeilToInt(targetNumberOfSections / gridDivisions.x);
}
else
{
gridDivisions.y = CalculateSideDivisions(height, divisor, maxHandlesPerFrame);
//Calculate how many divisions are needed for the other side
if (gridDivisions.y != divisor)
{
divisor = Mathf.CeilToInt((targetNumberOfSections / (float)gridDivisions.y));
}
gridDivisions.x = Mathf.CeilToInt(targetNumberOfSections / gridDivisions.y);
}
return(gridDivisions);
}
}
public void CreateSubGridAtSelection()
{
if (SelectedNode.Equals(NavGrid.NO_NODE))
{
return;
}
Vector2Int point = _selectedNode;
point.x = Mathf.Clamp(point.x - (_selectedSubGrid.Width / 2), 0, currentNavGrid.Width - 1);
point.y = Mathf.Clamp(point.y - (_selectedSubGrid.Height / 2), 0, currentNavGrid.Height - 1);
_selectedSubGrid = SubGridGenerator.CreateSubGridAtPoint(currentNavGrid, _selectedSubGrid, point, _NODE_RENDER_LIMIT);
SceneView.RepaintAll();
}
public void SelectParentSubGrid()
{
if (_selectedSubGrid == null || _selectedSubGrid.GetParentSubGrid() == null)
{
return;
}
SubGrid parentSubGrid = _selectedSubGrid.GetParentSubGrid();
if (parentSubGrid != null)
{
_selectedSubGrid = parentSubGrid;
}
SceneView.RepaintAll();
}
//Fires when the active scene object changes
private void OnSelectionChange()
{
currentNavGrid = FindSelectedNavGrid();
if (currentNavGrid)
{
SceneView.onSceneGUIDelegate -= OnSceneGUI;
SceneView.onSceneGUIDelegate += OnSceneGUI;
_selectedSubGrid = SubGridGenerator.CreateSubGrids(currentNavGrid, NODE_RENDER_LIMIT);
}
else
{
SceneView.onSceneGUIDelegate -= OnSceneGUI;
}
}
public static SubGrid CreateSubGridAtPoint(NavGrid navgrid, SubGrid currentSubgrid, Vector2Int point, int nodeRenderLimit)
{
int width = Mathf.FloorToInt(Mathf.Sqrt(nodeRenderLimit));
int height = width;
if (navgrid.Width < point.x + width)
{
width = navgrid.Width - point.x;
}
if (navgrid.Height < point.y + height)
{
height = navgrid.Height - point.y;
}
SubGrid newSubGrid = new SubGrid(navgrid, currentSubgrid, point, width, height);
return(newSubGrid);
}
//Recursively divides the provided subgrid into smaller subgrids until acceptable sizes are reached
private static void GenerateSubGrids(SubGrid subGrid, NavGrid navGrid, int maxHandlesPerFrame)
{
//Determine how many sections we will be dividing into
int numberOfSections = CalculateTargetNumberOfSections(subGrid, maxHandlesPerFrame);
if (numberOfSections == 1)
{
return;
}
//Calculate how we will be dividing the grid, avoiding creating side lengths that are too small
Vector2 gridDivisors = CalculateGridDivisions(subGrid, numberOfSections, maxHandlesPerFrame);
//Divide the grid into SubGrids
List <SubGrid> newSubGrids = DivideSubGrid(subGrid, navGrid, gridDivisors);
//Divide each newly generated SubGrid
foreach (SubGrid newSubGrid in newSubGrids)
{
GenerateSubGrids(newSubGrid, navGrid, maxHandlesPerFrame);
}
}
//Calculate how many sections the grid should be divided into
private static int CalculateTargetNumberOfSections(SubGrid subGrid, int maxHandlesPerFrame)
{
float targetAmount = (subGrid.Width * subGrid.Height) / (float)maxHandlesPerFrame;
if (targetAmount <= 1f)
{
return(1);
}
if (targetAmount <= 2f)
{
return(2);
}
if (targetAmount <= 4)
{
return(4);
}
if (targetAmount <= 9f)
{
return(9);
}
if (targetAmount <= 16f)
{
return(16);
}
if (targetAmount <= 25f)
{
return(25);
}
return(36);
}
private void DrawNodeHandles(NavGridTool tool, SubGrid subGrid)
{
float NODE_SIZE = 0.45f;
NavGrid navGrid = subGrid.GetNavGrid();
Vector2Int subGridOriginPosition = subGrid.GetOriginCoordinate();
Vector3 subGridWorldPosition = navGrid.GetOriginWorldPosition() + new Vector3(subGridOriginPosition.x, 0, subGridOriginPosition.y);
int width = subGrid.Width;
int height = subGrid.Height;
//Draw each node
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
Vector2Int nodeCoordinates =
new Vector2Int(
subGridOriginPosition.x + x,
subGridOriginPosition.y + y
);
Handles.color = tool.ChooseNodeColor(nodeCoordinates);
if (currentMode == Mode.EDIT)
{
//Draw nodes as buttons and watch for input
if (Handles.Button(subGridWorldPosition + new Vector3(x, 0, y), Quaternion.LookRotation(Vector3.up), NODE_SIZE, NODE_SIZE, Handles.CubeHandleCap))
{
HandleNodeClick(subGrid, nodeCoordinates);
}
}
}
}
}
public void AddChildSubGrid(SubGrid newGrid)
{
subGrids.Add(newGrid);
}
