static Mesh LoadSubmesh(NanoMesh *sdmesh, int index)
{
NanoMeshGroup *g = NanoMeshGetGroup(sdmesh, index);
if (g == null)
{
throw new IndexOutOfRangeException($"Invalid W3D submesh index: {index}");
}
#if UNITY_2018_1_OR_NEWER
var mesh = new Mesh
{
name = g->Name.AsString,
vertices = g->Vertices.AsArray,
normals = g->Normals.AsArray,
uv = g->Coords.AsArray,
triangles = g->Indices.AsArray
};
mesh.RecalculateTangents();
mesh.RecalculateBounds();
#else
var mesh = new Mesh
{
Name = g->Name.AsString,
Vertices = g->Vertices.AsArray,
Normals = g->Normals.AsArray,
Coords = g->Coords.AsArray,
Triangles = g->Indices.AsArray
};
#endif
return(mesh);
}
/// <summary>
/// Attempts to load an .OBJ file.
/// TODO: Currently only 1 meshgroup is supported
/// </summary>
/// <param name="meshPath">.OBJ file to load</param>
/// <param name="options">MeshLoader options control processing steps during loading</param>
/// <returns>Loaded mesh or throws exception</returns>
public static Mesh Load(string meshPath, Options options)
{
if (!File.Exists(meshPath))
{
throw new FileNotFoundException($"Mesh file does not exist: {meshPath}");
}
NanoMesh *nanoMesh = null;
try
{
nanoMesh = NanoMeshOpen(meshPath, options);
if (nanoMesh == null)
{
throw new IOException($"Mesh open failed: {meshPath}\n{NanoGetLastError()}");
}
// @todo We only support 1 meshgroup
return(LoadSubmesh(nanoMesh, 0));
}
finally
{
if (nanoMesh != null)
{
NanoMeshClose(nanoMesh);
}
}
}
NanoMeshGroup *NanoMeshNewGroup(NanoMesh *mesh, [MarshalAs(UnmanagedType.LPStr)] string groupName);
bool NanoMeshSave(NanoMesh *mesh, [MarshalAs(UnmanagedType.LPStr)] string fileName);
NanoMeshGroup *NanoMeshGetGroup(NanoMesh *mesh, int groupId);
void NanoMeshClose(NanoMesh *mesh);
