public SceneBrep Clone()
{
SceneBrep tmp = new SceneBrep();
tmp.geometry = new List <Vector3>(geometry);
if (normals != null)
{
tmp.normals = new List <Vector3>(normals);
}
if (colors != null)
{
tmp.colors = new List <Vector3>(colors);
}
if (txtCoords != null)
{
tmp.txtCoords = new List <Vector2>(txtCoords);
}
if (vertexPtr != null)
{
tmp.vertexPtr = new List <int>(vertexPtr);
}
if (oppositePtr != null)
{
tmp.oppositePtr = new List <int>(oppositePtr);
}
tmp.BuildCornerTable();
return(tmp);
}
/// <summary>
/// Reads one 3D scene from a given stream (containing text variant of Wavefront OBJ format).
/// </summary>
/// <param name="reader">Already open text reader</param>
/// <param name="scene">Scene to be modified</param>
/// <returns>Number of faces read</returns>
public int ReadBrep(StreamReader reader, SceneBrep scene)
{
if (reader == null)
{
return(SceneBrep.NULL);
}
Debug.Assert(scene != null);
scene.Reset();
return(ReadBrep(reader, scene, Matrix4.Identity));
}
/// <summary>
/// Writes the whole B-rep scene to a given text stream (uses text variant of Wavefront OBJ format).
/// </summary>
/// <param name="writer">Already open text writer</param>
/// <param name="scene">Scene to write</param>
public void WriteBrep(StreamWriter writer, SceneBrep scene)
{
if (scene == null || scene.Triangles < 1)
{
return;
}
int i;
for (i = 0; i < scene.Vertices; i++)
{
Vector3 v = scene.GetVertex(i);
writer.WriteLine(String.Format(CultureInfo.InvariantCulture, "{0} {1} {2} {3}", new object[] { VERTEX, v.X, v.Y, v.Z }));
}
bool hasNormals = scene.Normals > 0;
if (hasNormals)
{
for (i = 0; i < scene.Vertices; i++)
{
Vector3 n = scene.GetNormal(i);
writer.WriteLine(String.Format(CultureInfo.InvariantCulture, "{0} {1} {2} {3}", new object[] { VERTEX_NORMAL, n.X, n.Y, n.Z }));
}
}
for (i = 0; i < scene.Triangles; i++)
{
int A, B, C;
scene.GetTriangleVertices(i, out A, out B, out C);
A++; B++; C++;
if (hasNormals)
{
writer.WriteLine("{0} {1}//{1} {2}//{2} {3}//{3}", FACE, A, B, C);
}
else
{
writer.WriteLine("{0} {1} {2} {3}", FACE, A, B, C);
}
}
}
/// <summary>
/// Reads one 3D scene from a given file (containing text variant of Wavefront OBJ format).
/// Can read GZipped files.
/// </summary>
/// <param name="fileName">File-name (ending by .gz for gzipped file)</param>
/// <param name="scene">Scene to be modified</param>
/// <returns>Number of faces read</returns>
public int ReadBrep(String fileName, SceneBrep scene)
{
if (fileName == null ||
fileName.Length == 0)
{
return(SceneBrep.NULL);
}
StreamReader reader;
if (fileName.EndsWith(".gz"))
{
reader = new StreamReader(new GZipStream(new FileStream(fileName, FileMode.Open), CompressionMode.Decompress));
}
else
{
reader = new StreamReader(new FileStream(fileName, FileMode.Open));
}
int faces = ReadBrep(reader, scene);
reader.Close();
return(faces);
}
/// <summary>
/// Reads one 3D scene from a given stream (containing text variant of Wavefront OBJ format).
/// </summary>
/// <param name="reader">Already open text reader</param>
/// <param name="scene">Scene to be modified</param>
/// <param name="scene">Matrix for instancing</param>
/// <returns>Number of faces read</returns>
public int ReadBrep(StreamReader reader, SceneBrep scene, Matrix4 m)
{
if (reader == null)
{
return(SceneBrep.NULL);
}
Debug.Assert(scene != null);
int v0 = scene.Vertices;
int lastVertex = v0 - 1;
int faces = 0;
List <Vector2> txtCoords = new List <Vector2>(256);
List <Vector3> normals = new List <Vector3>(256);
int lastTxtCoord = -1;
int lastNormal = -1;
int[] f = new int[3];
do
{
string line = reader.ReadLine();
if (line == null)
{
break;
}
int commentPos = line.IndexOf(COMMENT);
if (commentPos >= 0)
{
line = line.Substring(0, commentPos);
}
string[] tokens = line.Split(DELIMITERS, StringSplitOptions.RemoveEmptyEntries);
if (tokens.Length < 1)
{
continue;
}
switch (tokens[0])
{
case VERTEX:
if (tokens.Length < 4)
{
continue;
}
Vector3 coord;
if (!float.TryParse(tokens[1], NumberStyles.Float, CultureInfo.InvariantCulture, out coord.X) ||
!float.TryParse(tokens[2], NumberStyles.Float, CultureInfo.InvariantCulture, out coord.Y) ||
!float.TryParse(tokens[3], NumberStyles.Float, CultureInfo.InvariantCulture, out coord.Z))
{
continue;
}
if (MirrorConversion)
{
coord.Z = -coord.Z;
}
lastVertex = scene.AddVertex(Vector3.Transform(coord, m));
break;
case VERTEX_TEXTURE:
if (tokens.Length < 3)
{
continue;
}
Vector2 txtCoord;
if (!float.TryParse(tokens[1], NumberStyles.Float, CultureInfo.InvariantCulture, out txtCoord.X) ||
!float.TryParse(tokens[2], NumberStyles.Float, CultureInfo.InvariantCulture, out txtCoord.Y))
{
continue;
}
txtCoords.Add(txtCoord);
lastTxtCoord++;
break;
case VERTEX_NORMAL:
if (tokens.Length < 4)
{
continue;
}
Vector3 norm;
if (!float.TryParse(tokens[1], NumberStyles.Float, CultureInfo.InvariantCulture, out norm.X) ||
!float.TryParse(tokens[2], NumberStyles.Float, CultureInfo.InvariantCulture, out norm.Y) ||
!float.TryParse(tokens[3], NumberStyles.Float, CultureInfo.InvariantCulture, out norm.Z))
{
continue;
}
if (MirrorConversion)
{
norm.Z = -norm.Z;
}
normals.Add(Vector3.TransformNormal(norm, m));
lastNormal++;
break;
case FACE:
if (tokens.Length < 4)
{
continue;
}
int N = tokens.Length - 1;
if (f.Length < N)
{
f = new int[N];
}
int i;
for (i = 0; i < N; i++) // read indices for one vertex
{
string[] vt = tokens[i + 1].Split('/');
int ti, ni;
ti = ni = 0; // 0 => value not present
// 0 .. vertex coord index
if (!int.TryParse(vt[0], out f[i]) ||
f[i] == 0)
{
break;
}
if (f[i] > 0)
{
f[i] = v0 + f[i] - 1;
}
else
{
f[i] = lastVertex + 1 - f[i];
}
if (vt.Length > 1)
{
// 1 .. texture coord index (not yet)
if (!int.TryParse(vt[1], out ti))
{
ti = 0;
}
if (vt.Length > 2)
{
// 2 .. normal vector index
if (!int.TryParse(vt[2], out ni))
{
ni = 0;
}
}
}
// there was a texture coord..
if (ti != 0)
{
if (ti > 0)
{
ti--;
}
else
{
ti = lastTxtCoord + 1 - ti;
}
if (ti >= 0 && ti < txtCoords.Count)
{
scene.SetTxtCoord(f[i], txtCoords[ti]);
}
}
// there was a normal..
if (ni != 0)
{
if (ni > 0)
{
ni--;
}
else
{
ni = lastNormal + 1 - ni;
}
if (ni >= 0 && ni < normals.Count)
{
scene.SetNormal(f[i], normals[ni]);
}
}
}
N = i;
for (i = 1; i < N - 1; i++)
{
scene.AddTriangle(f[0], f[i], f[i + 1]);
faces++;
}
break;
}
}while (!reader.EndOfStream);
return(faces);
}
