public void Export_SwitchYZ_False()
{
var originalMesh = new MeshGeometry3D
{
Positions = { new Point3D(0, 1, 0) },
Normals = { new Vector3D(0, 1, 0) },
TriangleIndices = { 0, 0, 0 }
};
byte[] buffer;
using (var memory = new MemoryStream())
using (var writer = new StreamWriter(memory))
{
var exporter = new ObjExporter();
exporter.SwitchYZ = false;
exporter.ExportNormals = true;
exporter.ExportMesh(writer, originalMesh, Transform3D.Identity);
writer.Flush();
buffer = memory.ToArray();
}
Model3DGroup modelGroup;
using (var memory = new MemoryStream(buffer))
{
var reader = new ObjReader();
reader.SwitchYZ = false;
modelGroup = reader.Read(memory);
}
var model3D = (GeometryModel3D)modelGroup.Children[0];
var modelMesh = (MeshGeometry3D)model3D.Geometry;
Assert.AreEqual(originalMesh.Positions[0], modelMesh.Positions[0]);
Assert.AreEqual(originalMesh.Normals[0], modelMesh.Normals[0]);
}
public void Export(MeshGeometryModel3D[] modelList, string filename, string texturePath = "", bool exportTexture = false)
{
var path = Path.GetDirectoryName(filename);
var objFile = filename;
var mtlFile = path + @"\" + Path.GetFileNameWithoutExtension(filename) + ".mtl";
int offset = 0;
var objWriter = new StreamWriter(objFile);
StreamWriter mtlWriter = null;
if (exportTexture)
{
mtlWriter = new StreamWriter(mtlFile);
}
if (exportTexture)
{
objWriter.WriteLine("mtllib " + Path.GetFileName(mtlFile));
objWriter.WriteLine();
}
objWriter.WriteLine("o " + Path.GetFileNameWithoutExtension(filename));
var translate = -findPointOfGravity(modelList);
foreach (var element in modelList)
{
var modelName = IfcViewerWrapper.GetValidPathName(element.Name);
var tmpFile = path + @"\" + modelName + ".obj";
List <string> vList = new List <string>();
List <string> vtList = new List <string>();
List <string> vnList = new List <string>();
List <string> fList = new List <string>();
var exp = new ObjExporter(tmpFile);
exp.ExportNormals = true;
exp.ExportMesh((MeshGeometry3D)element.Geometry, Transform3D.Identity);
exp.Close();
using (StreamReader sr = File.OpenText(tmpFile))
{
string s = "";
while ((s = sr.ReadLine()) != null)
{
switch (s.Split(' ')[0])
{
case "v":
var e = s.Split(' ');
var sl = "v " + (Convert.ToDouble(e[1]) + translate.X) + " " + (-Convert.ToDouble(e[3]) + translate.Y) + " " + (Convert.ToDouble(e[2]) + translate.Z);
vList.Add(sl);
break;
case "vt":
vtList.Add(s);
break;
case "vn":
vnList.Add(s);
break;
case "f":
var split = s.Split(' ');
var st = "f ";
for (int i = 3; i > 0; i--)
{
var ad = split[i].Split('/');
st += (Convert.ToInt32(ad[0]) + offset) + "/" +
(Convert.ToInt32(ad[2]) + offset) +
"/" + (Convert.ToInt32(ad[1]) + offset) + " ";
}
fList.Add(st);
break;
}
}
}
File.Delete(tmpFile);
var tmpMtlFile = Path.GetFileName(tmpFile).Split('.');
tmpMtlFile[tmpMtlFile.Length - 1] = "mtl";
File.Delete(Path.GetDirectoryName(tmpFile) + @"\" + String.Join(".", tmpMtlFile));
offset += vList.Count;
objWriter.WriteLine();
objWriter.WriteLine("g " + modelName);
foreach (var line in vList)
{
objWriter.WriteLine(line);
}
foreach (var line in vtList)
{
objWriter.WriteLine(line);
}
foreach (var line in vnList)
{
objWriter.WriteLine(line);
}
if (exportTexture)
{
objWriter.WriteLine();
objWriter.WriteLine("usemtl material_" + modelName);
}
foreach (var f in fList)
{
objWriter.WriteLine(f);
}
if (exportTexture)
{
mtlWriter.WriteLine("newmtl material_" + modelName + "\n" +
"Ks 0.000 0.000 0.000 # black (off)" + "\n" +
"map_Kd " + modelName + ".jpg" + "\n");
}
var textureFile = texturePath + @"\" + modelName + ".jpg";
if (!texturePath.Equals("") && File.Exists(textureFile))
{
File.Copy(textureFile, path + @"\" + Path.GetFileName(textureFile));
}
}
objWriter.Close();
if (exportTexture)
{
mtlWriter.Close();
}
}
