/// <summary>
/// Builds the mesh for a single tile.
/// NOTE: This sets the Terrain's NavMesh property.
/// In order to move between tiles, we need to generate one mesh for the entire map
/// </summary>
public void BuildMesh(TerrainTile tile)
{
// let recast build the navmesh and then call our callback
var inputFile = GetInputMeshFile(tile.Terrain.MapId, tile.TileX, tile.TileY);
var navMeshFile = GetNavMeshFile(tile.Terrain.MapId, tile.TileX, tile.TileY);
var exists = DoesNavMeshExist(tile.Terrain.MapId, tile.TileX, tile.TileY);
if (!exists)
{
var directory = new FileInfo(inputFile).Directory;
if (directory != null)
{
Directory.CreateDirectory(directory.FullName);
}
directory = new FileInfo(navMeshFile).Directory;
if (directory != null)
{
Directory.CreateDirectory(directory.FullName);
}
// export input mesh to file
ExportRecastInputMesh(tile, inputFile);
Console.WriteLine("Building new NavMesh...");
}
var start = DateTime.Now;
var result = RecastAPI.BuildMesh(
GenerateTileId(tile),
inputFile,
navMeshFile,
SmashMeshDlgt);
if (result == 0)
{
throw new Exception("Could not build mesh for tile " + TerrainConstants.GetTileName(tile.TileX, tile.TileY) + " in map " + Terrain.MapId);
}
if (!exists)
{
Console.WriteLine("Done in {0:0.000}s", (DateTime.Now - start).TotalSeconds);
}
//// move all vertices above the surface
//var mesh = tile.Terrain.NavMesh;
//for (var i = 0; i < mesh.Vertices.Length; i++)
//{
// var vert = mesh.Vertices[i];
// vert.Z += 0.001f;
// var ray = new Ray(vert, Vector3.Down); // see if vertex is above surface
// var hit = tile.FindFirstHitTriangle(ray);
// if (hit == -1)
// {
// vert.Z -= 0.001f;
// // vertex is below surface
// ray = new Ray(vert, Vector3.Up); // find surface right above mesh
// hit = tile.FindFirstHitTriangle(ray);
// if (hit != -1)
// {
// // set vertex height equal to terrain
// var tri = tile.GetTriangle(hit);
// var plane = new Plane(tri.Point1, tri.Point2, tri.Point3);
// Intersection.LineSegmentIntersectsPlane(ray.Position, ray.Direction, plane, out mesh.Vertices[i]);
// }
// }
//}
}
public static string GetInputMeshFile(MapId map, int tileX, int tileY)
{
var tileName = TerrainConstants.GetTileName(tileX, tileY);
return(WCellTerrainSettings.RecastInputMeshFolder + (int)map + "/" + tileName + RecastAPI.InputMeshExtension);
}
/// <summary>
/// The filename of extracted heightfields
/// </summary>
public static string GetFileName(MapId map, int tileX, int tileY)
{
var path = GetMapDirectory(map);
return(Path.Combine(path, TerrainConstants.GetTileName(tileX, tileY) + FileExtension));
}
