/// <summary>
/// Writes the model to a binary STL file.
/// </summary>
/// <param name="model">The DMTModel to write.</param>
/// <param name="file">The file to write to.</param>
public void WriteFile(DMTModel model, File file)
{
//Check that we are not going to inadvertantly overwrite a file
file.Delete();
BinaryFileWriter binaryWriter = null;
try
{
binaryWriter = new BinaryFileWriter(file);
//If there are no triangles then return
if (model.TotalNoOfTriangles == 0)
{
throw new DMTFileException(DMTFileError.NoTriangles);
}
// Write header
for (var i = 0; i < 80; i++)
{
byte b = 0;
binaryWriter.WriteByte(b);
}
// write number of triangles
binaryWriter.WriteUInteger(model.TotalNoOfTriangles);
Point vertex1 = null;
Point vertex2 = null;
Point vertex3 = null;
Vector normal = null;
foreach (var block in model.TriangleBlocks)
{
for (var intCounter = 0; intCounter <= block.NoOfTriangles - 1; intCounter++)
{
// STL wants a triangle Normal
vertex1 = block.GetVertex1(intCounter);
vertex2 = block.GetVertex2(intCounter);
vertex3 = block.GetVertex3(intCounter);
normal = DMTTriangle.GetNormal(vertex1, vertex2, vertex3);
binaryWriter.WriteSingle((float)normal.I.Value);
binaryWriter.WriteSingle((float)normal.J.Value);
binaryWriter.WriteSingle((float)normal.K.Value);
// Write vertices
var x = (float)vertex1.X;
var y = (float)vertex1.Y;
var z = (float)vertex1.Z;
binaryWriter.WriteSingle(x);
binaryWriter.WriteSingle(y);
binaryWriter.WriteSingle(z);
x = (float)vertex2.X;
y = (float)vertex2.Y;
z = (float)vertex2.Z;
binaryWriter.WriteSingle(x);
binaryWriter.WriteSingle(y);
binaryWriter.WriteSingle(z);
x = (float)vertex3.X;
y = (float)vertex3.Y;
z = (float)vertex3.Z;
binaryWriter.WriteSingle(x);
binaryWriter.WriteSingle(y);
binaryWriter.WriteSingle(z);
// padding to 50 bytes
ushort code = 0;
binaryWriter.WriteUInt16(code);
}
}
}
finally
{
if (binaryWriter != null)
{
binaryWriter.Close();
}
}
}
/// <summary>
/// Returns the vector normal of the first triangle with that vertex.
/// </summary>
/// <returns>The normal for the first triangle with specified vertex.</returns>
/// <remarks></remarks>
public Vector GetNormal(Point vertex)
{
int triangleIndex = GetTrianglesAtVertex(vertex).First();
return(DMTTriangle.GetNormal(GetVertex1(triangleIndex), GetVertex2(triangleIndex), GetVertex3(triangleIndex)));
}