public LRBuilder(Point3D[] vertices, Triangle[] triangles)
{
IFLTriangleMesh iflTriangleMesh = new IFLTriangleMesh();
iflTriangleMesh.V = vertices;
iflTriangleMesh.Triangles = triangles;
IConverter<CTTriangleMesh> iflToCt = Converter.Converter.GetSpecificConverter<IFLTriangleMesh, CTTriangleMesh>(iflTriangleMesh);
DateTime startTime = DateTime.Now;
this.ctTriangleMesh = iflToCt.Convert();
DateTime endTime = DateTime.Now;
TimeSpan span = endTime.Subtract(startTime);
Init();
}
/// <summary>
/// Loads the input file.
/// I property values remain unchanged since the last run, then the file is not reloaded, unless the Realod property is set to true.
/// </summary>
public IFLTriangleMesh Execute(string fn)
{
// first pass determines the number of vertices and the number of triangles
StreamReader sr;
try
{
sr = new StreamReader(fn);
}
catch (FileNotFoundException fnfe)
{
throw new Exception(fnfe.Message);
}
int triangleCount = 0;
int vertexCount = 0;
int lineCount = 0;
int textureCoordinateCount = 0;
string line = sr.ReadLine();
bool normalsFound = false;
while (line != null)
{
line = line.Trim();
if (line.StartsWith("v ")) vertexCount++;
if (line.StartsWith("vt ")) textureCoordinateCount++;
if (line.StartsWith("vn ")) normalsFound = true;
if ((line.StartsWith("f ")) || (line.StartsWith("fo ")) || line.StartsWith("f\t"))
{
triangleCount++;
if (line.Split(new char[] { ' ', '\t' }).Length == 5)
triangleCount++;
}
line = sr.ReadLine();
lineCount++;
}
sr.Close();
// second pass performs the actual parsing
sr = new StreamReader(fn);
Point3D[] vertices = new Point3D[vertexCount];
Triangle[] triangles = new Triangle[triangleCount];
int vi = 0;
int ti = 0;
int ni = 0;
int tci = 0;
Point3D point;
Triangle triangle, textureTriangle;
NumberFormatInfo nfi = new NumberFormatInfo();
nfi.NumberDecimalSeparator = ".";
nfi.NumberGroupSeparator = ",";
int linePos = 0;
line = sr.ReadLine();
while (line != null)
{
line = line.Trim();
//parsing of a vertex
if (line.StartsWith("v "))
{
string[] coords = line.Split(new char[] { ' ' }, 4, StringSplitOptions.RemoveEmptyEntries);
double c1 = double.Parse(coords[1], nfi);
double c2 = double.Parse(coords[2], nfi);
double c3 = double.Parse(coords[3], nfi);
point = new Point3D { X = c1, Y = c2, Z = c3 };
vertices[vi] = point;
vi++;
}
// parsing of a triangle
if ((line.StartsWith("f ")) || (line.StartsWith("fo ")) || (line.StartsWith("f\t")))
{
string[] indices = line.Split(new char[] { ' ', '\t' }, 5, StringSplitOptions.RemoveEmptyEntries);
int t1 = 0;
int t2 = 0;
int t3 = 0;
string[] parts = indices[1].Split(new char[] { '/' }, StringSplitOptions.RemoveEmptyEntries);
int v1 = int.Parse(parts[0]) - 1;
if (parts.Length > 1)
t1 = int.Parse(parts[1]) - 1;
parts = indices[2].Split(new char[] { '/' }, StringSplitOptions.RemoveEmptyEntries);
int v2 = int.Parse(parts[0]) - 1;
if (parts.Length > 1)
t2 = int.Parse(parts[1]) - 1;
parts = indices[3].Split(new char[] { '/' }, StringSplitOptions.RemoveEmptyEntries);
int v3 = int.Parse(parts[0]) - 1;
if (parts.Length > 1)
t3 = int.Parse(parts[1]) - 1;
if (flipNormals)
{
triangle = new Triangle { Vertex1 = v1, Vertex2 = v3, Vertex3 = v2 };
textureTriangle = new Triangle { Vertex1 = t1, Vertex2 = t3, Vertex3 = t2 };
}
else
{
triangle = new Triangle { Vertex1 = v1, Vertex2 = v2, Vertex3 = v3 };
textureTriangle = new Triangle { Vertex1 = t1, Vertex2 = t2, Vertex3 = t3 };
}
if (indices.Length == 4)
{
triangles[ti] = triangle;
ti++;
}
if (indices.Length == 5)
{
parts = indices[4].Split(new char[] { '/' }, StringSplitOptions.RemoveEmptyEntries);
v2 = int.Parse(parts[0]) - 1;
if (parts.Length > 1)
t2 = int.Parse(parts[1]) - 1;
if (flipNormals)
{
triangle = new Triangle { Vertex1 = v1, Vertex2 = v3, Vertex3 = v2 };
textureTriangle = new Triangle { Vertex1 = t1, Vertex2 = t2, Vertex3 = t3 };
}
else
{
triangle = new Triangle { Vertex1 = v1, Vertex2 = v3, Vertex3 = v2 };
textureTriangle = new Triangle { Vertex1 = t1, Vertex2 = t2, Vertex3 = t3 };
}
triangles[ti] = triangle;
ti++;
}
}
line = sr.ReadLine();
linePos++;
}
// creating an output Mesh instance
output = new IFLTriangleMesh();
output.V = vertices;
output.Triangles = triangles;
return (output);
}