public void Clear()
{
Width = 0;
Height = 0;
NodeWidth = 0;
NodeHeight = 0;
Nodes = new PathingGridNode[0];
Points.Clear();
IsClosed = false;
}
/// <summary>
/// Creates the grid.
/// </summary>
/// <param name="nodeWidth">Width of each node in the grid.</param>
/// <param name="nodeHeight">Height of each node in the grid.</param>
public void CreateGrid(int nodeWidth, int nodeHeight)
{
var minX = int.MaxValue;
var minY = int.MaxValue;
var maxX = int.MinValue;
var maxY = int.MinValue;
foreach (var point in Points)
{
if (point.X < minX)
{
minX = point.X;
}
if (point.Y < minY)
{
minY = point.Y;
}
if (point.X > maxX)
{
maxX = point.X;
}
if (point.Y > maxY)
{
maxY = point.Y;
}
}
var bounds = new Rectangle(minX, minY, maxX - minX, maxY - minY);
Width = (int)Math.Ceiling((double)bounds.Width / nodeWidth);
Height = (int)Math.Ceiling((double)bounds.Height / nodeHeight);
var output = new PathingGridNode[Width * Height];
var polygonPoints = Points.ToArray();
for (var row = 0; row < Height; ++row)
{
for (var column = 0; column < Width; ++column)
{
var nodeBounds = new Rectangle(bounds.X + column * nodeWidth, bounds.Y + row * nodeHeight, nodeWidth, nodeHeight);
output[row * Width + column] = new PathingGridNode(column, row, nodeBounds, IsRectangleInsidePolygon(polygonPoints, nodeBounds, UseTightTests));
}
}
Nodes = output;
}
