public void ExportAssImp(string fileName, string modelType, ExportSettings settings, Arguments cmdargs)
{
fileName = Path.GetFullPath(fileName); // Get absolute path instead of relative
string outDir = Path.GetDirectoryName(fileName);
string fileNameNoExt = Path.GetFileNameWithoutExtension(fileName);
if (modelType == "obj")
{
fileName = Path.Combine(outDir, fileNameNoExt + ".obj");
}
else
{
fileName = Path.Combine(outDir, fileNameNoExt + ".dae");
}
Scene outScene = new Scene {
RootNode = new Node("RootNode")
};
Console.WriteLine();
Console.WriteLine("Processing Materials ->");
Materials.FillScene(outScene, Textures, outDir);
Console.WriteLine();
Console.WriteLine("Processing Meshes ->");
Shapes.FillScene(outScene, VertexData.Attributes, Joints.FlatSkeleton, SkinningEnvelopes.InverseBindMatrices);
Console.WriteLine();
Console.Write("Processing Skeleton");
Scenegraph.FillScene(outScene, Joints.FlatSkeleton, settings.UseSkeletonRoot);
Scenegraph.CorrectMaterialIndices(outScene, Materials);
Console.WriteLine();
Console.WriteLine();
Console.WriteLine("Processing Textures ->");
Textures.DumpTextures(outDir, fileNameNoExt + "_tex_headers.json", true, cmdargs.readMipmaps);
string infPath = Path.Combine(outDir, fileNameNoExt + "_hierarchy.json");
this.Scenegraph.DumpJson(infPath);
Console.WriteLine();
Console.WriteLine("Removing Duplicate Verticies ->");
foreach (Mesh mesh in outScene.Meshes)
{
Console.Write(mesh.Name.Replace('_', ' ') + ": ");
// Assimp has a JoinIdenticalVertices post process step, but we can't use that or the skinning info we manually add won't take it into account.
RemoveDuplicateVertices(mesh);
Console.Write("✓");
Console.WriteLine();
}
AssimpContext cont = new AssimpContext();
if (modelType == "obj")
{
Console.WriteLine("Writing the OBJ file...");
cont.ExportFile(outScene, fileName, "obj");//, PostProcessSteps.ValidateDataStructure);
using (System.IO.StreamWriter file = new System.IO.StreamWriter(fileName)) {
string mtllibname = fileName.Split(new char[] { '\\', '/' }, StringSplitOptions.RemoveEmptyEntries).Last() + ".mtl";
file.WriteLine(String.Format("mtllib {0}", mtllibname));
foreach (Assimp.Mesh mesh in outScene.Meshes)
{
foreach (Assimp.Vector3D vertex in mesh.Vertices)
{
file.WriteLine(String.Format("v {0} {1} {2}", vertex.X, vertex.Y, vertex.Z));
}
}
foreach (Assimp.Mesh mesh in outScene.Meshes)
{
foreach (Assimp.Vector3D normal in mesh.Normals)
{
file.WriteLine(String.Format("vn {0} {1} {2}", normal.X, normal.Y, normal.Z));
}
}
foreach (Assimp.Mesh mesh in outScene.Meshes)
{
if (mesh.HasTextureCoords(0))
{
foreach (Assimp.Vector3D uv in mesh.TextureCoordinateChannels[0])
{
file.WriteLine(String.Format("vt {0} {1}", uv.X, uv.Y));
}
}
}
int vertex_offset = 1;
foreach (Assimp.Mesh mesh in outScene.Meshes)
{
string material_name = outScene.Materials[mesh.MaterialIndex].Name;
file.WriteLine(String.Format("usemtl {0}", material_name));
foreach (Assimp.Face face in mesh.Faces)
{
file.Write("f ");
foreach (int index in face.Indices)
{
file.Write(index + vertex_offset);
if (mesh.HasTextureCoords(0))
{
file.Write("/");
file.Write(index + vertex_offset);
}
if (!mesh.HasTextureCoords(0) && mesh.HasNormals)
{
file.Write("//");
file.Write(index + vertex_offset);
}
else if (mesh.HasNormals)
{
file.Write("/");
file.Write(index + vertex_offset);
}
file.Write(" ");
}
file.Write("\n");
}
vertex_offset += mesh.VertexCount;
}
}
return;
}
else
{
cont.ExportFile(outScene, fileName, "collada", PostProcessSteps.ValidateDataStructure);
}
//if (SkinningEnvelopes.Weights.Count == 0)
// return; // There's no skinning information, so we can stop here
// Now we need to add some skinning info, since AssImp doesn't do it for some bizarre reason
StreamWriter test = new StreamWriter(fileName + ".tmp");
StreamReader dae = File.OpenText(fileName);
Console.WriteLine();
Console.Write("Finalizing the Mesh");
while (!dae.EndOfStream)
{
string line = dae.ReadLine();
if (line == " <library_visual_scenes>")
{
AddControllerLibrary(outScene, test);
test.WriteLine(line);
test.Flush();
}
else if (line.Contains("<node"))
{
string[] testLn = line.Split('\"');
string name = testLn[3];
if (Joints.FlatSkeleton.Exists(x => x.Name == name))
{
string jointLine = line.Replace(">", $" sid=\"{ name }\" type=\"JOINT\">");
test.WriteLine(jointLine);
test.Flush();
}
else
{
test.WriteLine(line);
test.Flush();
}
}
else if (line.Contains("</visual_scene>"))
{
foreach (Mesh mesh in outScene.Meshes)
{
string matname = "mat";
bool keepmatnames = false;
if (keepmatnames == true)
{
matname = AssimpMatnameSanitize(mesh.MaterialIndex, outScene.Materials[mesh.MaterialIndex].Name);
}
else
{
matname = AssimpMatnameSanitize(mesh.MaterialIndex, Materials.m_Materials[mesh.MaterialIndex].Name);
}
test.WriteLine($" <node id=\"{ mesh.Name }\" name=\"{ mesh.Name }\" type=\"NODE\">");
test.WriteLine($" <instance_controller url=\"#{ mesh.Name }-skin\">");
test.WriteLine(" <skeleton>#skeleton_root</skeleton>");
test.WriteLine(" <bind_material>");
test.WriteLine(" <technique_common>");
test.WriteLine($" <instance_material symbol=\"m{matname}\" target=\"#{matname}\" />");
test.WriteLine(" </technique_common>");
test.WriteLine(" </bind_material>");
test.WriteLine(" </instance_controller>");
test.WriteLine(" </node>");
test.Flush();
}
test.WriteLine(line);
test.Flush();
}
else if (line.Contains("<matrix"))
{
string matLine = line.Replace("<matrix>", "<matrix sid=\"matrix\">");
test.WriteLine(matLine);
test.Flush();
}
else
{
test.WriteLine(line);
test.Flush();
}
Console.Write(".");
}
Console.Write("✓");
Console.WriteLine();
test.Close();
dae.Close();
File.Copy(fileName + ".tmp", fileName, true);
File.Delete(fileName + ".tmp");
}