/// <summary>
/// Creates a mesh by reading the <see cref="Heightmap"/> and
/// caches the result. If a mesh of the same resolution has already
/// been created, it is returned and (optionally) added to the scene.
/// In order to construct a mesh, the <see cref="HeightmapResolution"/>
/// must be greater than or equal to the <see cref="MeshResolution"/>.
/// </summary>
/// <param name="addToScene">Optionally disable adding the Mesh directly to the scene</param>
public MeshData CreateMesh(bool addToScene = true)
{
MeshData computed = FindComputedForResolution((int)MeshResolution);
if (computed != default(MeshData))
{
return(computed);
}
Vector3[] vertices = new Vector3[(int)MeshResolution * (int)MeshResolution];
int increment = HeightmapResolution / (int)MeshResolution;
for (int x = 0; x < (int)MeshResolution; x += increment)
{
for (int z = 0; z < (int)MeshResolution; z += increment)
{
Vector2 localXZ = PositionToLocal(x, z, (int)MeshResolution);
lock (_asyncMeshLock) {
float y = GetHeightAmplifiedAt(x, z);
vertices[x / increment + z / increment * (int)MeshResolution] = new Vector3(localXZ.x, y, localXZ.y);
}
}
}
MeshData md = MeshDataFromVertices(vertices);
ComputedMeshes.Add(new KeyValuePair <int, MeshData>((int)MeshResolution, md));
if (addToScene)
{
var mf = _tile.GetMeshFilter();
_tile.GetMeshRenderer();
mf.sharedMesh = md.Mesh;
}
return(md);
}
/// <summary>
/// Find the <see cref="ComputedMeshes"/> that has the passed
/// resolution as a key.
/// </summary>
/// <param name="resolution">Resolution to search for</param>
/// <returns>MeshData if found, default(MeshData) otherwise</returns>
private MeshData FindComputedForResolution(int resolution)
{
return(ComputedMeshes.Find(kvp => kvp.Key == resolution).Value);
}
/// <summary>
/// Whether this TileMesh has already computed a mesh
/// with the passed resolution.
/// </summary>
/// <param name="res">resolution to check</param>
public bool HasMeshAtResolution(Resolution res)
{
return(ComputedMeshes.Exists(kvp => kvp.Key == (int)res));
}