public static void LoadMeshGenerationData(string filePath, MeshGenerationData output)
{
output.Clear();
var size = new FileInfo(filePath).Length;
var stride = sizeof(int) + 3 * sizeof(float);
var count = (size - 3 * sizeof(int)) / stride;
using (var fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read))
{
using (var mmf = MemoryMappedFile.CreateFromFile(fs, null, size, MemoryMappedFileAccess.Read, HandleInheritability.None, false))
{
using (var accessor = mmf.CreateViewAccessor(0, size, MemoryMappedFileAccess.Read))
{
long pos = 0;
for (var i = 0; i < 3; ++i)
{
accessor.Read(pos, out int tmp);
output.gridSize[i] = tmp;
pos += sizeof(int);
}
for (var i = 0; i < count; ++i)
{
accessor.Read(pos, out int key);
pos += sizeof(int);
var val = TreeUtility.MmvaReadVector3(accessor, ref pos);
output.cells.Add(key, val);
}
}
}
}
}