static int Main(string[] args)
{
if (args.Length < 1)
{
Console.WriteLine("Usage: input_file.obj [options]");
Console.WriteLine(" Options:");
Console.WriteLine(" -verbose");
return(1);
}
var filePath = args[0];
s_verbose = (args.Length >= 2 && string.Compare(args[1], "-verbose") == 0);
// Load object file.
if (!File.Exists(filePath))
{
Console.WriteLine($"Specified file not found: {filePath}");
return(1);
}
Console.WriteLine($"Loading {args[0]}...");
var objLoaderFactory = new ObjLoaderFactory();
var materialProvider = new MaterialNullStreamProvider();
var objLoader = objLoaderFactory.Create(materialProvider);
LoadResult loadResult;
using (var fileStream = File.OpenRead(args[0]))
{
loadResult = objLoader.Load(fileStream);
}
Console.WriteLine($" {loadResult.Groups.Count} shapes");
// Create empty atlas.
XAtlas.SetPrint(PrintCallback, s_verbose);
Atlas atlas = Atlas.Create();
// Set progress callback.
stopwatch = new Stopwatch();
atlas.SetProgressCallback(ProgressCallback, IntPtr.Zero);
var globalStopwatch = Stopwatch.StartNew();
// Add meshes to atlas.
uint totalVertices = 0, totalFaces = 0;
var modelMeshes = ObjParserHelper.GenerateMeshes(loadResult).ToArray();
int meshIndex = 0;
foreach (var mesh in modelMeshes)
{
var indexBuffer = mesh.IndexBuffer;
var vertexBuffer = mesh.VertexBuffer;
var indexBufferHandle = GCHandle.Alloc(indexBuffer, GCHandleType.Pinned);
var vertexBufferHandle = GCHandle.Alloc(vertexBuffer, GCHandleType.Pinned);
var meshDecl = new MeshDecl();
meshDecl.VertexCount = (uint)vertexBuffer.Length;
meshDecl.VertexPositionData = vertexBufferHandle.AddrOfPinnedObject();
meshDecl.VertexPositionStride = VertexPositionNormalTexture.Stride;
//var normalElement = vertexLayout.Elements.FirstOrDefault(x => x.Semantic == ElementSemanticType.Normal);
//if (normalElement != default)
//{
meshDecl.VertexNormalData = IntPtr.Add(meshDecl.VertexPositionData, sizeof(float) * 3);
meshDecl.VertexNormalStride = VertexPositionNormalTexture.Stride;
//}
//var texCoordElement = vertexLayout.Elements.FirstOrDefault(x => x.Semantic == ElementSemanticType.TexCoord);
//if (texCoordElement != default)
//{
meshDecl.VertexUvData = IntPtr.Add(meshDecl.VertexNormalData, sizeof(float) * 3);
meshDecl.VertexUvStride = VertexPositionNormalTexture.Stride;
//}
meshDecl.IndexCount = (uint)indexBuffer.Length;
meshDecl.IndexData = indexBufferHandle.AddrOfPinnedObject();
meshDecl.IndexFormat = IndexFormat.UInt16;
#if !OBJ_TRIANGULATE
//if (objPositions.Length != indices.Length / 3)
{
//meshDecl.FaceVertexCount = objMesh.num_vertices.data();
//meshDecl.FaceCount = (uint32_t)objMesh.num_vertices.size();
}
#endif
var error = atlas.AddMesh(meshDecl, 1);
indexBufferHandle.Free();
vertexBufferHandle.Free();
if (error != AddMeshError.Success)
{
atlas.Destroy();
Console.WriteLine($"Error adding mesh {meshIndex} '{mesh.Name}': {XAtlas.StringForEnum(error)}\n");
return(1);
}
meshIndex++;
totalVertices += meshDecl.VertexCount;
if (meshDecl.FaceCount > 0)
{
totalFaces += meshDecl.FaceCount;
}
else
{
totalFaces += meshDecl.IndexCount / 3; // Assume triangles if MeshDecl.FaceCount not specified.
}
}
atlas.AddMeshJoin(); // Not necessary. Only called here so geometry totals are printed after the AddMesh progress indicator.
Console.WriteLine($" {totalVertices} total vertices");
Console.WriteLine($" {totalFaces} total faces");
// Generate atlas.
Console.WriteLine("Generating atlas");
atlas.Generate();
Console.WriteLine($" {atlas.ChartCount} charts");
Console.WriteLine($" {atlas.AtlasCount} atlases");
int i;
for (i = 0; i < atlas.AtlasCount; i++)
{
Console.WriteLine($" {i}: {atlas.Utilization[i] * 100.0f:0.00}% utilization");
}
Console.WriteLine($" {atlas.Width}x{atlas.Height} resolution");
totalVertices = 0;
i = 0;
foreach (var mesh in atlas.Meshes)
{
totalVertices += mesh.VertexCount;
// Input and output index counts always match.
if (mesh.IndexCount != modelMeshes[i++].IndexBuffer.Length)
{
throw new InvalidOperationException("Input and output index counts does not match");
}
}
globalStopwatch.Stop();
Console.WriteLine($" {totalVertices} total vertices");
Console.WriteLine($"{globalStopwatch.Elapsed.TotalSeconds} seconds ({globalStopwatch.ElapsedMilliseconds} ms) elapsed total");
// Cleanup.
atlas.Destroy();
Console.WriteLine("Done");
return(0);
}