/// <summary>
/// Construct a object
/// </summary>
/// <param name="objecttype">Object type</param>
/// <param name="meshvertices">Mesh vertices</param>
/// <param name="material">Object material</param>
public GLWaveformObject(ObjectTypeEnum objecttype, GLMeshVertices meshvertices, string material)
{
ObjectType = objecttype;
Vertices = meshvertices;
MatLibname = material;
Indices = new GLMeshIndices();
}
/// <summary>
/// Read objects from a string.
/// </summary>
/// <param name="textdescription">Wavefront definition of objects</param>
/// <param name="correctzforopengl">Correct for opengl orientation in z axis (true means invert)</param>
/// <param name="thrownotimplemented">Throw on finding a not implemented descriptor</param>
/// <returns>List of objects, or null if fails</returns>
/// <exception cref="System.NotImplementedException">Descriptor not implemented</exception>
public List <GLWaveformObject> ReadOBJData(string textdescription, bool correctzforopengl = true, bool thrownotimplemented = false) // throws exceptions
{
reader_vertices = new GLMeshVertices();
reader_objects = new List <GLWaveformObject>();
reader_current = null;
reader_matlib = "Not set";
float zcorr = correctzforopengl ? -1 : 1;
using (TextReader reader = new StringReader(textdescription))
{
string line;
while ((line = reader.ReadLine()) != null)
{
line = line.Trim();
if (line.HasChars())
{
List <string> words = new List <string>();
foreach (var w in line.Split(' ', '\t'))
{
if (w.HasChars())
{
words.Add(w);
}
}
string type = words[0].ToLower();
line = line.Substring(words[0].Length).Trim();
words.RemoveAt(0);
//System.Diagnostics.Debug.WriteLine("Read " + line);
if (type.StartsWith("#"))
{
// comment
}
else if (type == "end") //Rob addition!
{
break;
}
else if (type == "v")
{
if (words.Count >= 3)
{
reader_vertices.Vertices.Add(new Vector4(words[0].InvariantParseFloat(0),
words[1].InvariantParseFloat(0),
zcorr * words[2].InvariantParseFloat(0),
words.Count < 4 ? 1 : words[3].InvariantParseFloat(0)));
}
}
else if (type == "vt")
{
if (words.Count >= 2)
{
reader_vertices.TextureVertices.Add(new Vector3(words[0].InvariantParseFloat(0), words[1].InvariantParseFloat(0),
words.Count < 3 ? 0 : words[2].InvariantParseFloat(0)));
}
}
else if (type == "vn")
{
if (words.Count >= 2)
{
reader_vertices.Normals.Add(new Vector3(words[0].InvariantParseFloat(0), words[1].InvariantParseFloat(0), zcorr * words[2].InvariantParseFloat(0)));
}
}
else if (type == "vp")
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "deg")
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "bmat")
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "step")
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "cstype")
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "f")
{
reader_current = Create(reader_current == null || (reader_current.ObjectType != GLWaveformObject.ObjectTypeEnum.Polygon && reader_current.ObjectType != GLWaveformObject.ObjectTypeEnum.Unassigned));
reader_current.ObjectType = GLWaveformObject.ObjectTypeEnum.Polygon;
foreach (string w in words)
{
string[] comps = w.Split('/');
int ti = comps.Length > 1 ? (comps[1].InvariantParseInt(int.MinValue)) : int.MinValue;
if (ti != int.MinValue)
{
if (reader_current.Indices.VertexIndices.Count != reader_current.Indices.TextureIndices.Count)
{
throw new NotImplementedException("New texture index but previous was missing them");
}
if (ti < 0)
{
ti = reader_vertices.TextureVertices.Count + ti;
}
else if (ti >= 1)
{
ti--;
}
ti = Math.Min(Math.Max(ti, 0), reader_vertices.TextureVertices.Count - 1);
reader_current.Indices.TextureIndices.Add((uint)ti);
}
int ni = comps.Length > 2 ? (comps[2].InvariantParseInt(int.MinValue)) : int.MinValue;
if (ni != int.MinValue)
{
if (reader_current.Indices.VertexIndices.Count != reader_current.Indices.NormalIndices.Count)
{
throw new NotImplementedException("New texture index but previous was missing them");
}
if (ni < 0)
{
ni = reader_vertices.Normals.Count + ni;
}
else if (ni >= 1)
{
ni--;
}
ni = Math.Min(Math.Max(ni, 0), reader_vertices.Normals.Count - 1);
reader_current.Indices.NormalIndices.Add((uint)ni);
}
int vi = comps[0].InvariantParseInt(int.MinValue);
if (vi != int.MinValue)
{
if (vi < 0)
{
vi = reader_vertices.Vertices.Count + vi;
}
else if (vi >= 1)
{
vi--;
}
vi = Math.Min(Math.Max(vi, 0), reader_vertices.Vertices.Count - 1);
reader_current.Indices.VertexIndices.Add((uint)vi);
}
}
}
else if (type == "p")
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "l")
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "curv") // curve http://paulbourke.net/dataformats/obj/
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "curv2") // 2d curve
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "surf") // surface
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "parm")
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "trim")
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "hole")
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "scrv")
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "sp")
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "end")
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "con")
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "mtllib")
{
reader_matlib = line;
if (reader_current != null)
{
reader_current.MatLibname = reader_matlib;
}
}
else if (type == "usemtl")
{
reader_current = Create(reader_current == null || reader_current.ObjectType != GLWaveformObject.ObjectTypeEnum.Unassigned);
reader_current.Material = line;
}
else if (type == "g")
{
reader_current = Create(reader_current == null || reader_current.ObjectType != GLWaveformObject.ObjectTypeEnum.Unassigned);
reader_current.GroupName = line;
}
else if (type == "s") // smoothing group
{
// ignore smoothing groups..
//throw new NotImplementedException("Not implemented:" + type);
}
else if (type == "mg") // merging group
{
throw new NotImplementedException("Not implemented:" + type);
}
else if (type == "o") // object name
{
reader_current = Create(reader_current == null || reader_current.ObjectType != GLWaveformObject.ObjectTypeEnum.Unassigned);
reader_current.ObjectName = line;
}
else if (type == "bevel") // Bevel interpolation
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "c_interp") // Color interpolation
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "d_interp") // Dissolve interpolation
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "lod") // Level of detail
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "shadow_obj") // Shadow casting
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "trace_obj") //Ray tracing
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "ctech") // Curve approximation technique
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else if (type == "stech") // Surface approximation technique
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
else
{
if (thrownotimplemented)
{
throw new NotImplementedException("Not implemented:" + type);
}
}
}
}
}
return(reader_objects);
}
