/// <summary>
/// Create the obj and mtl files with the given data
/// </summary>
/// <param name="wrlData">Data parsed from the wrl file</param>
/// <param name="objFilename">Output file</param>
/// <returns></returns>
public static bool WriteObj(WrlData wrlData, string objFilename)
{
// objFilename has the .obj extension
string directory = System.IO.Path.GetDirectoryName(objFilename);
string noExtension = System.IO.Path.GetFileNameWithoutExtension(objFilename);
string mtlRelative = $"{noExtension}.mtl";
string mtlFilename = System.IO.Path.Combine(directory, mtlRelative);
List <string> mtlLines = new List <string>(); // To store the lines to append to the mtl file
try
{
using (StreamWriter obj = new StreamWriter(objFilename))
{
// mtllib, o, v, vt, g, usemtl, s, f
obj.WriteLine(GenericUtils.GetCreditsFile());
obj.WriteLine(ObjUtils.GetNewMtlLib(mtlRelative));
int i_coordIndex = 0;
int i_texCoordIndex = 0;
int index = 0;
foreach (Transform transform in wrlData.TransformsList)
{
foreach (Shape shape in transform.ShapesList)
{
string groupName = "";
string urlTexture = null;
string diffuseColor = null;
if (shape.Appearance != null)
{
if (shape.Appearance.Material != null)
{
if (shape.Appearance.Material.DiffuseColor != null)
{
diffuseColor = shape.Appearance.Material.DiffuseColor.ToString();
}
}
if (shape.Appearance.Texture != null)
{
urlTexture = shape.Appearance.Texture.Url;
if (urlTexture != null)
{
groupName = ObjUtils.GetGroupName(index, urlTexture);
}
else
{
groupName = ObjUtils.GetGroupName(index);
}
}
else
{
groupName = ObjUtils.GetGroupName(index);
}
}
mtlLines.Add(MtlUtils.GetMtlData(groupName, urlTexture, diffuseColor));
obj.WriteLine(ObjUtils.GetNewObject(groupName)); // o
int sizeCoord = 0; int sizeTexCoord = 0;
if (shape.Geometry != null)
{
if (shape.Geometry.Coord != null)
{
sizeCoord = shape.Geometry.Coord.PointsList.Count;
foreach (Point point in shape.Geometry.Coord.PointsList)
{
obj.WriteLine(ObjUtils.GetNewCoord(point.ToString())); // v
}
}
if (shape.Geometry.TexCoord != null)
{
sizeTexCoord = shape.Geometry.TexCoord.UVList.Count;
foreach (UVCoordinates uv in shape.Geometry.TexCoord.UVList)
{
obj.WriteLine(ObjUtils.GetNewTexCoord(uv.ToString())); // vt
}
}
}
obj.WriteLine(ObjUtils.GetNewGroup(groupName)); // g
obj.WriteLine(ObjUtils.GetNewUseMtl(groupName)); // usemtl
obj.WriteLine(ObjUtils.GetNewSmoothGroup()); // s
if (shape.Geometry != null)
{
CoordIndexesWrl coordIndexes = shape.Geometry.CoordIndexes;
CoordIndexesWrl texCoordIndexes = shape.Geometry.TexCoordIndexes;
if (coordIndexes != null)
{
List <CoordIndexWrl> coordIndexesList = coordIndexes.IndexesList;
if (texCoordIndexes != null)
{
List <CoordIndexWrl> texCoordIndexesList = texCoordIndexes.IndexesList;
for (int i = 0; i < coordIndexesList.Count; i++)
{
string strIndexesF = GetIndexesF(coordIndexesList[i], texCoordIndexesList[i], i_coordIndex, i_texCoordIndex);
obj.WriteLine(ObjUtils.GetNewF(strIndexesF)); // f
}
}
else
{
foreach (CoordIndexWrl coordIndex in coordIndexesList)
{
string strIndexesF = GetIndexesF(coordIndex, i_coordIndex);
obj.WriteLine(ObjUtils.GetNewF(strIndexesF)); // f
}
}
}
}
i_coordIndex += sizeCoord;
i_texCoordIndex += sizeTexCoord;
index++;
}
}
}
}
catch
{
return(false);
}
return(MtlExporter.WriteMtl(mtlLines, mtlFilename)); // Create the mtl file
}