/// <summary>
/// For every T Junction add a vertex to the mesh edge that needs one.
/// </summary>
/// <param name="mesh"></param>
public static void RepairTJunctions(this Mesh mesh)
{
var nonManifoldEdges = mesh.GetNonManifoldEdges();
foreach (MeshEdge edge in nonManifoldEdges)
{
IVertex start = edge.VertexOnEnd[0];
IVertex end = edge.VertexOnEnd[1];
Vector3 normal = (end.Position - start.Position).GetNormal();
// Get all the vertices that lay on this edge
foreach (var vertex in mesh.Vertices)
{
// test if it falls on the edge
// split the edge at them
IVertex createdVertex;
MeshEdge createdMeshEdge;
mesh.SplitMeshEdge(edge, out createdVertex, out createdMeshEdge);
createdVertex.Position = vertex.Position;
createdVertex.Normal = vertex.Normal;
mesh.MergeVertices(vertex, createdVertex);
}
}
throw new NotImplementedException();
// and merge the mesh edges that are now manifold
//mesh.MergeMeshEdges(CancellationToken.None);
}
public static bool IsManifold(this Mesh mesh)
{
var nonManifoldEdges = mesh.GetNonManifoldEdges();
if (nonManifoldEdges.Count == 0)
{
return(true);
}
// Every non-manifold edge must have matching non-manifold edge(s) that it lines up with.
// If this is true the model is still functionally manifold.
return(false);
}
private static ImageBuffer BuildImageFromSTL(Mesh loadedMesh, string stlHashCode, Point2D size)
{
if(loadedMesh != null)
{
ImageBuffer tempImage = new ImageBuffer(size.x, size.y, 32, new BlenderBGRA());
Graphics2D partGraphics2D = tempImage.NewGraphics2D();
partGraphics2D.Clear(new RGBA_Bytes());
AxisAlignedBoundingBox aabb = loadedMesh.GetAxisAlignedBoundingBox();
double maxSize = Math.Max(aabb.XSize, aabb.YSize);
double scale = size.x / (maxSize * 1.2);
RectangleDouble bounds2D = new RectangleDouble(aabb.minXYZ.x, aabb.minXYZ.y, aabb.maxXYZ.x, aabb.maxXYZ.y);
PolygonMesh.Rendering.OrthographicZProjection.DrawTo(partGraphics2D, loadedMesh,
new Vector2((size.x / scale - bounds2D.Width) / 2 - bounds2D.Left,
(size.y / scale - bounds2D.Height) / 2 - bounds2D.Bottom),
scale, RGBA_Bytes.White);
List<MeshEdge> nonManifoldEdges = loadedMesh.GetNonManifoldEdges();
if (nonManifoldEdges.Count > 0)
{
if (File.Exists("RunUnitTests.txt"))
{
partGraphics2D.Circle(size.x / 4, size.x / 4, size.x / 8, RGBA_Bytes.Red);
}
}
// and save it to disk
string applicationUserDataPath = ApplicationDataStorage.Instance.ApplicationUserDataPath;
string folderToSavePrintsTo = Path.Combine(applicationUserDataPath, "data", "temp", "thumbnails");
string tgaFileName = Path.Combine(folderToSavePrintsTo, "{0}_{1}x{2}.tga".FormatWith(stlHashCode, size.x, size.y));
if (!Directory.Exists(folderToSavePrintsTo))
{
Directory.CreateDirectory(folderToSavePrintsTo);
}
ImageTgaIO.SaveImageData(tgaFileName, tempImage);
// and give it back
return tempImage;
}
return null;
}