/// <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>
/// 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));
}
public int ReadBrep(string fileName, SceneBrep scene)
{
Debug.Assert(scene != null);
this.scene = scene;
scene.Reset();
if (fileName == null || fileName.Length == 0)
{
throw new IOException("Invalid file name");
}
if (fileName.EndsWith(".gz"))
{
headerReader = new StreamReader(new GZipStream(new FileStream(fileName, FileMode.Open), CompressionMode.Decompress));
}
else
{
var fs = new FileStream(fileName, FileMode.Open);
headerReader = new StreamReader(fs);
}
// prepare buffers for data filling
if (!ParseHeader())
{
return(-1);
}
// read vertices
var vertexReader = GetReader("vertex");
var element = vertexReader.ReadElement();
List <Vector2> txtCoords = new List <Vector2>(256);
int[] f = new int[3];
int v0 = scene.Vertices;
int lastVertex = v0 - 1;
while (element != null)
{
lastVertex = scene.AddVertex(Vector3.TransformPosition(element.GetVertex(), matrix));
if (DoNormals)
{
Vector3.TransformNormal(element.GetNormal(), matrix);
scene.SetNormal(lastVertex, element.GetNormal());
}
if (DoTxtCoords)
{
scene.SetTxtCoord(lastVertex, element.GetTextureCoordinate());
}
if (DoColors)
{
scene.SetColor(lastVertex, element.GetVertexColor());
}
element = vertexReader.ReadElement();
}
// read triangles
var faceReader = GetReader("face");
element = faceReader.ReadElement();
while (element != null)
{
int A, B, C;
element.GetTriangleVertices(out A, out B, out C);
scene.AddTriangle(A, B, C);
element = faceReader.ReadElement();
}
headerReader.Close();
vertexReader.Close();
faceReader.Close();
return(scene.Triangles);
}
