public static bool Export(IEnumerable <Body> bodies, string fileName, bool binaryFormat)
{
var sumTriangleCount = 0;
var triangulations = new List <TriangulationData>();
foreach (var body in bodies)
{
var shape = body.Shape.GetTransformedBRep();
if (shape == null)
{
continue;
}
var triangulation = TriangulationHelper.GetTriangulation(shape, false);
if (triangulation.TriangleCount == 0)
{
continue;
}
triangulations.Add(triangulation);
sumTriangleCount += triangulation.TriangleCount;
}
if (sumTriangleCount == 0)
{
return(false);
}
IStlWriter writer;
if (binaryFormat)
{
writer = new StlBinaryWriter();
}
else
{
writer = new StlAsciiWriter();
}
writer.Init("Written by Macad3D STL-Export", sumTriangleCount);
foreach (var triangulation in triangulations)
{
var index = 0;
for (int triangle = 0; triangle < triangulation.TriangleCount; triangle++)
{
// Get vertices
var vertex1 = triangulation.Vertices[triangulation.Indices[index]];
var vertex2 = triangulation.Vertices[triangulation.Indices[index + 1]];
var vertex3 = triangulation.Vertices[triangulation.Indices[index + 2]];
index += 3;
// Calculate normal of facet
var vec1 = new Vec(vertex1, vertex2);
var vec2 = new Vec(vertex1, vertex3);
var normal = vec1.Crossed(vec2);
if (normal.SquareMagnitude() > gp.Resolution)
{
normal.Normalize();
}
else
{
normal = default;
}
// Write out facet
writer.AddFacet(normal, vertex1, vertex2, vertex3);
}
}
return(writer.WriteToFile(fileName));
}
public static bool Export(string fileName, IEnumerable <Body> bodies, bool smoothEdges)
{
ObjAsciiWriter writer = new ObjAsciiWriter();
writer.Init("Written by Macad3D OBJ-Export");
var indexOffset = 1; // OBJ list index starts with 1
var vertexMap = new Dictionary <Pnt, int>(); // Written vertex to resulting index
var indexList = new List <int>();
foreach (var body in bodies)
{
var shape = body.Shape.GetTransformedBRep();
if (shape == null)
{
continue;
}
var triangulation = TriangulationHelper.GetTriangulation(shape, false);
if (triangulation.TriangleCount == 0)
{
continue;
}
writer.AddObject(body.Name);
if (smoothEdges) // Export smooth edges
{
for (var vtxIndex = 0; vtxIndex < triangulation.Vertices.Length; vtxIndex++)
{
var vertex = triangulation.Vertices[vtxIndex];
int newIndex;
if (!vertexMap.TryGetValue(vertex, out newIndex))
{
writer.AddVertex(vertex);
newIndex = vertexMap.Count + indexOffset;
vertexMap.Add(vertex, newIndex);
}
indexList.Add(newIndex);
}
for (int i = 0; i < triangulation.Indices.Length; i += 3)
{
writer.AddFace(indexList[triangulation.Indices[i]], indexList[triangulation.Indices[i + 1]], indexList[triangulation.Indices[i + 2]]);
}
}
else // Export face by face
{
foreach (var vertex in triangulation.Vertices)
{
writer.AddVertex(vertex);
}
for (int i = 0; i < triangulation.Indices.Length; i += 3)
{
writer.AddFace(triangulation.Indices[i] + indexOffset, triangulation.Indices[i + 1] + indexOffset, triangulation.Indices[i + 2] + indexOffset);
}
}
indexOffset += smoothEdges ? vertexMap.Count : triangulation.Vertices.Length;
vertexMap.Clear(); // Don't share vertices between objects
indexList.Clear();
}
return(writer.WriteToFile(fileName));
}