public IOWriteResult Write(BinaryWriter writer, List <WriteMesh> vMeshes, WriteOptions options)
{
string header = "g3sharp_stl ";
byte[] header_bytes = ASCIIEncoding.ASCII.GetBytes(header);
byte[] stl_header = new byte[80];
Array.Clear(stl_header, 0, stl_header.Length);
Array.Copy(header_bytes, stl_header, header_bytes.Length);
writer.Write(stl_header);
int total_tris = 0;
foreach (WriteMesh mesh in vMeshes)
{
total_tris += mesh.Mesh.TriangleCount;
}
writer.Write(total_tris);
for (int mi = 0; mi < vMeshes.Count; ++mi)
{
IMesh mesh = vMeshes[mi].Mesh;
if (options.ProgressFunc != null)
{
options.ProgressFunc(mi, vMeshes.Count - 1);
}
Func <int, stl_triangle> producerF = (ti) =>
{
var tri = new stl_triangle();
Index3i t = mesh.GetTriangle(ti);
Vector3d a = mesh.GetVertex(t.a), b = mesh.GetVertex(t.b), c = mesh.GetVertex(t.c);
Vector3d n = MathUtil.Normal(a, b, c);
tri.nx = (float)n.x; tri.ny = (float)n.y; tri.nz = (float)n.z;
tri.ax = (float)a.x; tri.ay = (float)a.y; tri.az = (float)a.z;
tri.bx = (float)b.x; tri.by = (float)b.y; tri.bz = (float)b.z;
tri.cx = (float)c.x; tri.cy = (float)c.y; tri.cz = (float)c.z;
tri.attrib = 0;
return(tri);
};
Action <stl_triangle> consumerF = (tri) =>
{
byte[] tri_bytes = Util.StructureToByteArray(tri);
writer.Write(tri_bytes);
};
var stream = new ParallelStream <int, stl_triangle>();
stream.ProducerF = producerF;
stream.ConsumerF = consumerF;
// parallel version is slower =\
//stream.Run_Thread(mesh.TriangleIndices());
stream.Run(mesh.TriangleIndices());
}
return(new IOWriteResult(IOCode.Ok, ""));
}