public SubDMeshHandler.MeshGenerationResult GenerateSubDMesh()
{
if (this.list_4 == null)
{
throw new InvalidOperationException("Can not start SubDMesh handler: no triangles defined.");
}
if (this.list_4.Count < 1)
{
return(new SubDMeshHandler.MeshGenerationResult());
}
Database workingDatabase = HostApplicationServices.WorkingDatabase;
Editor arg_3C_0 = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor;
SubDMeshHandler.MeshGenerationResult result;
using (Transaction transaction = workingDatabase.TransactionManager.StartTransaction())
{
this.BuildDataStructure(true);
Point3dCollection point3dCollection = new Point3dCollection();
for (int i = 0; i < this.list_0.Count; i++)
{
point3dCollection.Add(new Point3d(this.list_0[i].X, this.list_0[i].Y, this.list_0[i].Z));
}
Int32Collection int32Collection = new Int32Collection(3 * this.list_4.Count);
for (int j = 0; j < this.list_4.Count; j++)
{
int32Collection.Add(3);
int32Collection.Add(this.list_1[j]);
int32Collection.Add(this.list_2[j]);
int32Collection.Add(this.list_3[j]);
}
SubDMesh subDMesh = new SubDMesh();
subDMesh.SetDatabaseDefaults();
subDMesh.SetSubDMesh(point3dCollection, int32Collection, 0);
subDMesh.SetPropertiesFrom(this.list_4[0].AcDbFace);
BlockTable blockTable = (BlockTable)transaction.GetObject(workingDatabase.BlockTableId, (OpenMode)1);
BlockTableRecord blockTableRecord = (BlockTableRecord)transaction.GetObject(blockTable[BlockTableRecord.ModelSpace], (OpenMode)1);
blockTableRecord.AppendEntity(subDMesh);
transaction.AddNewlyCreatedDBObject(subDMesh, true);
transaction.Commit();
result = new SubDMeshHandler.MeshGenerationResult
{
objectId_0 = subDMesh.ObjectId,
int_0 = this.list_0.Count,
int_1 = this.list_4.Count,
string_0 = DBManager.GetLayerName(subDMesh.LayerId)
};
}
return(result);
}
/// <summary> 将任意实体转换为网格 </summary>
public static void CreateMeshFromSolid()
{
//Select a solid.
Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
PromptEntityOptions opts = new PromptEntityOptions("\r\n" + "Select Solid:");
opts.SetRejectMessage("\r\n" + "That\'s not a solid!");
opts.AddAllowedClass(typeof(Solid3d), false);
PromptEntityResult res = ed.GetEntity(opts);
//Exit sub if user cancelled selection.
if (res.Status != PromptStatus.OK)
{
return;
}
//Usual transaction stuff
Database db = Application.DocumentManager.MdiActiveDocument.Database;
using (Transaction tr = db.TransactionManager.StartTransaction())
{
Solid3d mySolid = tr.GetObject(res.ObjectId, OpenMode.ForRead, false) as Solid3d;
Extents3d ext = mySolid.Bounds.Value;
Vector3d vec = ext.MaxPoint - ext.MinPoint;
// 实体转换为网格的生成算法，即平滑或插值的参数
//Define params governing mesh generation algorithm(See ObjectARX helpfiles for explanation of params you may need to change them depending on the scale of the solid)
MeshFaceterData myFaceterData = new MeshFaceterData(0.01 * vec.Length, 40 * Math.PI / 180, 2, 2, 15, 5, 5, 0);
//Create new mesh from solid (smoothing level 1)
MeshDataCollection meshData = SubDMesh.GetObjectMesh(mySolid, myFaceterData);
SubDMesh myMesh = new SubDMesh();
myMesh.SetSubDMesh(meshData.VertexArray, meshData.FaceArray, 1);
//Add mesh to database. (Don't remove solid).
myMesh.SetDatabaseDefaults();
var btr = tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite) as BlockTableRecord;
btr.AppendEntity(myMesh);
tr.AddNewlyCreatedDBObject(myMesh, true);
//Our work here is done
tr.Commit();
}
}
static public void MeshFromSolid()
{
Utils.Utils.Init();
Document acDoc = acApp.DocumentManager.MdiActiveDocument;
Database acCurDb = acDoc.Database;
Editor ed = acDoc.Editor;
while (true)
{
// Ask the user to select a solid
PromptEntityOptions peo = new PromptEntityOptions("Select a 3D solid");
peo.SetRejectMessage("\nA 3D solid must be selected.");
peo.AddAllowedClass(typeof(Solid3d), true);
PromptEntityResult per = ed.GetEntity(peo);
if (per.Status == PromptStatus.Cancel || per.Status == PromptStatus.Error)
{
Utils.Utils.End(); return;
}
using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction())
{
// Open the Block table for read
BlockTable acBlkTbl;
acBlkTbl = acTrans.GetObject(acCurDb.BlockTableId, OpenMode.ForRead) as BlockTable;
// Open the Block table record Model space for write
BlockTableRecord acBlkTblRec;
acBlkTblRec = acTrans.GetObject(acBlkTbl[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord;
Solid3d sol = acTrans.GetObject(per.ObjectId, OpenMode.ForWrite) as Solid3d;
try
{
// Set mesh/faces properties
MeshFaceterData mfd = new MeshFaceterData();
mfd.FaceterMeshType = 2;
mfd.FaceterDevNormal = 40;
mfd.FaceterDevSurface = 0.05;
mfd.FaceterGridRatio = 0;
mfd.FaceterMaxEdgeLength = 0;
MeshDataCollection md = SubDMesh.GetObjectMesh(sol, mfd);
// Create mesh
SubDMesh mesh = new SubDMesh();
mesh.SetDatabaseDefaults();
mesh.SetSubDMesh(md.VertexArray, md.FaceArray, 0);
mesh.Layer = sol.Layer;
// Add mesh to DB
acBlkTblRec.AppendEntity(mesh);
acTrans.AddNewlyCreatedDBObject(mesh, true);
// Delete solid object
sol.Erase(true);
acTrans.Commit();
}
catch (System.Exception ex)
{
ed.WriteMessage("Exception: {0}", ex.Message);
}
}
}
}
public void ImportUit3ds()
{
// Verkrijg document en database
Document acDoc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
Database acCurDb = acDoc.Database;
acCurDb.Surfu = 0;
acCurDb.Surfv = 0;
using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction())
{
// Open de block-tabel
BlockTable acBlkTbl;
acBlkTbl = acTrans.GetObject(acCurDb.BlockTableId, OpenMode.ForRead) as BlockTable;
// Open de Model space om in te schrijven
BlockTableRecord acBlkTblRec;
acBlkTblRec = acTrans.GetObject(acBlkTbl[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord;
//Bestand openen om binair te lezen
binReader = new BinaryReader(File.Open(@"C:/3DGISBuffer.dat", FileMode.Open));
//Loop door objecten
int aantalobjecten = binReader.ReadInt32();
for (int i = 0; i < aantalobjecten; i++)
{
Point3dCollection vertarray = new Point3dCollection();
Int32Collection facearray = new Int32Collection();
// Maak een subdivision-mesh aan
SubDMesh sdm = new SubDMesh();
sdm.SetDatabaseDefaults();
// Voeg het object toe aan de block-tabel
acBlkTblRec.AppendEntity(sdm);
acTrans.AddNewlyCreatedDBObject(sdm, true);
//objectkleur lezen
byte kleur_r = binReader.ReadByte();
byte kleur_g = binReader.ReadByte();
byte kleur_b = binReader.ReadByte();
//solidvlag lezen
Boolean solidvlag = LeesBoolean();
// Vertexarray vullen met vertices
Point3dCollection acPts3dPFMesh = new Point3dCollection();
Int32 nvts = binReader.ReadInt32();
for (int j = 1; j <= nvts; j++)
{
Single nX = binReader.ReadSingle();
Single nY = binReader.ReadSingle();
Single nZ = binReader.ReadSingle();
vertarray.Add(new Point3d(nX, nY, nZ));
}
//Facearray vullen met faces
int nfcs = binReader.ReadInt32();
for (int j = 1; j <= nfcs; j++)
{
int fc1 = binReader.ReadInt32();
int fc2 = binReader.ReadInt32();
int fc3 = binReader.ReadInt32();
facearray.Add(3);
facearray.Add(fc1 - 1);
facearray.Add(fc2 - 1);
facearray.Add(fc3 - 1);
}
//Vertex- en facearray toevoegen aan mesh, smoothlevel 0
sdm.SetSubDMesh(vertarray, facearray, 0);
Entity pMijnObj = null;
if (solidvlag)
{
Autodesk.AutoCAD.DatabaseServices.Solid3d pSolid = sdm.ConvertToSolid(false, false);
pMijnObj = (Entity)pSolid;
}
else
{
Autodesk.AutoCAD.DatabaseServices.Surface pSurface = sdm.ConvertToSurface(false, false);
pMijnObj = (Entity)pSurface;
}
acBlkTblRec.AppendEntity(pMijnObj);
acTrans.AddNewlyCreatedDBObject(pMijnObj, true);
//Verwijder mesh
sdm.Erase();
// Schrijf objectnaam naar Xrecord in de entity-dictionary van de surface
SaveXRecord(pMijnObj, LeesAttributen(), "GISData", acTrans);
//kleur van het object updaten
pMijnObj.Color = Color.FromRgb(kleur_r, kleur_g, kleur_b);
}//einde for-loop
// Schrijf het object naar de AutoCAD-database en sluit binReader
acTrans.Commit();
binReader.Close();
} //einde using transaction
} //einde method
