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ImportDxf.cs
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ImportDxf.cs
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using System;
using System.Collections.Generic;
using netDxf;
using netDxf.Entities;
using netDxf.Blocks;
using CADability.GeoObject;
using System.Runtime.CompilerServices;
using CADability.Shapes;
using CADability.Curve2D;
using CADability.Attribute;
#if WEBASSEMBLY
using CADability.WebDrawing;
using Point = CADability.WebDrawing.Point;
#else
using System.Drawing;
using Point = System.Drawing.Point;
#endif
using netDxf.Tables;
using System.Text;
using System.IO;
namespace CADability.DXF
{
// ODAFileConverter "C:\Zeichnungen\DxfDwg\Stahl" "C:\Zeichnungen\DxfDwg\StahlConverted" "ACAD2010" "DWG" "0" "0"
// only converts whole directories.
/// <summary>
/// Imports a DXF file, converts it to a project
/// </summary>
public class Import
{
private DxfDocument doc;
private Project project;
private Dictionary<string, GeoObject.Block> blockTable;
private Dictionary<netDxf.Tables.Layer, ColorDef> layerColorTable;
private Dictionary<netDxf.Tables.Layer, Attribute.Layer> layerTable;
/// <summary>
/// Create the Import instance. The document is being read and converted to netDXF objects.
/// </summary>
/// <param name="fileName"></param>
public Import(string fileName)
{
using (Stream stream = File.Open(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
doc = DxfDocument.Load(stream);
}
}
public static bool CanImportVersion(string fileName)
{
netDxf.Header.DxfVersion ver = DxfDocument.CheckDxfFileVersion(fileName, out bool isBinary);
return ver >= netDxf.Header.DxfVersion.AutoCad2000;
}
private void FillModelSpace(Model model)
{
netDxf.Blocks.Block modelSpace = doc.Blocks["*Model_Space"];
foreach (EntityObject item in modelSpace.Entities)
{
IGeoObject geoObject = GeoObjectFromEntity(item);
if (geoObject != null) model.Add(geoObject);
}
model.Name = "*Model_Space";
}
private void FillPaperSpace(Model model)
{
netDxf.Blocks.Block modelSpace = doc.Blocks["*Paper_Space"];
foreach (EntityObject item in modelSpace.Entities)
{
IGeoObject geoObject = GeoObjectFromEntity(item);
if (geoObject != null) model.Add(geoObject);
}
model.Name = "*Paper_Space";
}
/// <summary>
/// creates and returns the project
/// </summary>
public Project Project { get => CreateProject(); }
private Project CreateProject()
{
if (doc == null) return null;
project = Project.CreateSimpleProject();
blockTable = new Dictionary<string, GeoObject.Block>();
layerColorTable = new Dictionary<netDxf.Tables.Layer, ColorDef>();
layerTable = new Dictionary<netDxf.Tables.Layer, Attribute.Layer>();
foreach (var item in doc.Layers)
{
Attribute.Layer layer = project.LayerList.CreateOrFind(item.Name);
layerTable[item] = layer;
Color rgb = item.Color.ToColor();
if (rgb.ToArgb() == Color.White.ToArgb()) rgb = Color.Black;
ColorDef cd = project.ColorList.CreateOrFind(item.Name + ":ByLayer", rgb);
layerColorTable[item] = cd;
}
foreach (var item in doc.Linetypes)
{
List<double> pattern = new List<double>();
for (int i = 0; i < item.Segments.Count; i++)
{
if (item.Segments[i].Type == LinetypeSegmentType.Simple)
{
pattern.Add(Math.Abs(item.Segments[i].Length));
}
}
project.LinePatternList.CreateOrFind(item.Name, pattern.ToArray());
}
FillModelSpace(project.GetModel(0));
Model paperSpace = new Model();
FillPaperSpace(paperSpace);
if (paperSpace.Count > 0)
{
project.AddModel(paperSpace);
Model modelSpace = project.GetModel(0);
if (modelSpace.Count == 0)
{ // if the modelSpace is empty and the paperSpace contains entities, then show the paperSpace
for (int i = 0; i < project.ModelViewCount; ++i)
{
ProjectedModel pm = project.GetProjectedModel(i);
if (pm.Model == modelSpace) pm.Model = paperSpace;
}
}
}
doc = null;
return project;
}
private IGeoObject GeoObjectFromEntity(EntityObject item)
{
IGeoObject res = null;
switch (item)
{
case netDxf.Entities.Line dxfLine: res = CreateLine(dxfLine); break;
case netDxf.Entities.Ray dxfRay: res = CreateRay(dxfRay); break;
case netDxf.Entities.Arc dxfArc: res = CreateArc(dxfArc); break;
case netDxf.Entities.Circle dxfCircle: res = CreateCircle(dxfCircle); break;
case netDxf.Entities.Ellipse dxfEllipse: res = CreateEllipse(dxfEllipse); break;
case netDxf.Entities.Spline dxfSpline: res = CreateSpline(dxfSpline); break;
case netDxf.Entities.Face3D dxfFace: res = CreateFace(dxfFace); break;
case netDxf.Entities.PolyfaceMesh dxfPolyfaceMesh: res = CreatePolyfaceMesh(dxfPolyfaceMesh); break;
case netDxf.Entities.Hatch dxfHatch: res = CreateHatch(dxfHatch); break;
case netDxf.Entities.Solid dxfSolid: res = CreateSolid(dxfSolid); break;
case netDxf.Entities.Insert dxfInsert: res = CreateInsert(dxfInsert); break;
case netDxf.Entities.Polyline2D dxfPolyline2D: res = CreatePolyline2D(dxfPolyline2D); break;
case netDxf.Entities.MLine dxfMLine: res = CreateMLine(dxfMLine); break;
case netDxf.Entities.Text dxfText: res = CreateText(dxfText); break;
case netDxf.Entities.Dimension dxfDimension: res = CreateDimension(dxfDimension); break;
case netDxf.Entities.MText dxfMText: res = CreateMText(dxfMText); break;
case netDxf.Entities.Leader dxfLeader: res = CreateLeader(dxfLeader); break;
case netDxf.Entities.Polyline3D dxfPolyline3D: res = CreatePolyline3D(dxfPolyline3D); break;
case netDxf.Entities.Point dxfPoint: res = CreatePoint(dxfPoint); break;
case netDxf.Entities.Mesh dxfMesh: res = CreateMesh(dxfMesh); break;
default:
System.Diagnostics.Trace.WriteLine("dxf: not imported: " + item.ToString());
break;
}
if (res != null)
{
SetAttributes(res, item);
SetUserData(res, item);
res.IsVisible = item.IsVisible;
}
return res;
}
private static GeoPoint GeoPoint(Vector3 p)
{
return new GeoPoint(p.X, p.Y, p.Z);
}
private static GeoVector GeoVector(Vector3 p)
{
return new GeoVector(p.X, p.Y, p.Z);
}
internal static Plane Plane(Vector3 center, Vector3 normal)
{
// this is AutoCADs arbitrary axis algorithm we must use here to get the correct plane
// because sometimes we need the correct x-axis, y-axis orientation
//Let the world Y axis be called Wy, which is always(0, 1, 0).
//Let the world Z axis be called Wz, which is always(0, 0, 1).
//If(abs(Nx) < 1 / 64) and(abs(Ny) < 1 / 64) then
// Ax = Wy X N(where “X” is the cross - product operator).
//Otherwise,
// Ax = Wz X N.
//Scale Ax to unit length.
GeoVector n = GeoVector(normal);
GeoVector ax = (Math.Abs(normal.X) < 1.0 / 64 && Math.Abs(normal.Y) < 1.0 / 64) ? CADability.GeoVector.YAxis ^ n : CADability.GeoVector.ZAxis ^ n;
GeoVector ay = n ^ ax;
return new Plane(GeoPoint(center), ax, ay);
}
private HatchStyleSolid FindOrCreateSolidHatchStyle(Color clr)
{
for (int i = 0; i < project.HatchStyleList.Count; i++)
{
if (project.HatchStyleList[i] is HatchStyleSolid hss)
{
if (hss.Color.Color.ToArgb() == clr.ToArgb()) return hss;
}
}
HatchStyleSolid nhss = new HatchStyleSolid();
nhss.Name = "Solid_" + clr.ToString();
nhss.Color = project.ColorList.CreateOrFind(clr.ToString(), clr);
project.HatchStyleList.Add(nhss);
return nhss;
}
private HatchStyleLines FindOrCreateHatchStyleLines(netDxf.Entities.EntityObject entity, double lineAngle, double lineDistance, double[] dashes)
{
for (int i = 0; i < project.HatchStyleList.Count; i++)
{
if (project.HatchStyleList[i] is HatchStyleLines hsl)
{
if (hsl.ColorDef.Color.ToArgb() == entity.Layer.Color.ToColor().ToArgb() && hsl.LineAngle == lineAngle && hsl.LineDistance == lineDistance) return hsl;
}
}
HatchStyleLines nhsl = new HatchStyleLines();
string name = NewName(entity.Layer.Name, project.HatchStyleList);
nhsl.Name = name;
nhsl.LineAngle = lineAngle;
nhsl.LineDistance = lineDistance;
nhsl.ColorDef = project.ColorList.CreateOrFind(entity.Layer.Color.ToColor().ToString(), entity.Layer.Color.ToColor());
Lineweight lw = entity.Lineweight;
if (lw == Lineweight.ByLayer) lw = entity.Layer.Lineweight;
if (lw == Lineweight.ByBlock && entity.Owner != null) lw = entity.Owner.Layer.Lineweight; // not sure, but Block doesn't seem to have a lineweight
if (lw < 0) lw = 0;
nhsl.LineWidth = project.LineWidthList.CreateOrFind("DXF_" + lw.ToString(), ((int)lw) / 100.0);
nhsl.LinePattern = FindOrcreateLinePattern(dashes);
project.HatchStyleList.Add(nhsl);
return nhsl;
}
private ColorDef FindOrCreateColor(AciColor color, netDxf.Tables.Layer layer)
{
if (color.IsByLayer && layer != null)
{
ColorDef res = layerColorTable[layer] as ColorDef;
if (res != null) return res;
}
Color rgb = color.ToColor();
if (color.ToColor().ToArgb() == Color.White.ToArgb())
{
rgb = Color.Black;
}
string colorname = rgb.ToString();
return project.ColorList.CreateOrFind(colorname, rgb);
}
private string NewName(string prefix, IAttributeList list)
{
string name = prefix;
while (list.Find(name) != null)
{
string[] parts = name.Split('_');
if (parts.Length >= 2 && int.TryParse(parts[parts.Length - 1], out int nn))
{
parts[parts.Length - 1] = (nn + 1).ToString();
name = parts[0];
for (int j = 1; j < parts.Length; j++) name += parts[j];
}
else
{
name += "_1";
}
}
return name;
}
private LinePattern FindOrcreateLinePattern(double[] dashes, string name = null)
{
// in CADability a line pattern always starts with a stroke (dash) followed by a gap (space). In DXF positiv is stroke, negative is gap
if (dashes.Length == 0)
{
for (int i = 0; i < project.LinePatternList.Count; i++)
{
if (project.LinePatternList[i].Pattern == null || project.LinePatternList[i].Pattern.Length == 0) return project.LinePatternList[i];
}
return new LinePattern(NewName("DXFpattern", project.LinePatternList));
}
if (dashes[0] < 0)
{
List<double> pattern = new List<double>(dashes);
if (pattern[pattern.Count - 1] > 0)
{
pattern.Insert(0, pattern[pattern.Count - 1]);
pattern.RemoveAt(pattern.Count - 1);
}
else
{ // a pattern that starts with a gap and ends with a gap, what does this mean?
pattern.Insert(0, 0.0);
}
if ((pattern.Count & 0x01) != 0) pattern.Add(0.0); // there must be an even number (stroke-gap appear in pairs)
dashes = pattern.ToArray();
}
else if ((dashes.Length & 0x01) != 0)
{
List<double> pattern = new List<double>(dashes);
pattern.Add(0.0);
dashes = pattern.ToArray();
}
return new LinePattern(NewName("DXFpattern", project.LinePatternList), dashes);
}
private void SetAttributes(IGeoObject go, netDxf.Entities.EntityObject entity)
{
if (go is IColorDef cd) cd.ColorDef = FindOrCreateColor(entity.Color, entity.Layer);
go.Layer = layerTable[entity.Layer];
if (go is ILinePattern lp) lp.LinePattern = project.LinePatternList.Find(entity.Linetype.Name);
if (go is ILineWidth ld)
{
Lineweight lw = entity.Lineweight;
if (lw == Lineweight.ByLayer) lw = entity.Layer.Lineweight;
if (lw == Lineweight.ByBlock && entity.Owner != null) lw = entity.Owner.Layer.Lineweight; // not sure, but Block doesn't seem to have a lineweight
if (lw < 0) lw = 0;
ld.LineWidth = project.LineWidthList.CreateOrFind("DXF_" + lw.ToString(), ((int)lw) / 100.0);
}
}
private void SetUserData(IGeoObject go, netDxf.Entities.EntityObject entity)
{
foreach (KeyValuePair<string, XData> item in entity.XData)
{
ExtendedEntityData xdata = new ExtendedEntityData();
xdata.ApplicationName = item.Value.ApplicationRegistry.Name;
string name = item.Value.ApplicationRegistry.Name + ":" + item.Key;
for (int i = 0; i < item.Value.XDataRecord.Count; i++)
{
xdata.Data.Add(new KeyValuePair<XDataCode, object>(item.Value.XDataRecord[i].Code, item.Value.XDataRecord[i].Value));
}
go.UserData.Add(name, xdata);
}
go.UserData["DxfImport.Handle"] = new UserInterface.StringProperty(entity.Handle, "DxfImport.Handle");
}
private GeoObject.Block FindBlock(netDxf.Blocks.Block entity)
{
if (!blockTable.TryGetValue(entity.Handle, out GeoObject.Block found))
{
found = GeoObject.Block.Construct();
found.Name = entity.Name;
found.RefPoint = GeoPoint(entity.Origin);
for (int i = 0; i < entity.Entities.Count; i++)
{
IGeoObject go = GeoObjectFromEntity(entity.Entities[i]);
if (go != null) found.Add(go);
}
blockTable[entity.Handle] = found;
}
return found;
}
private IGeoObject CreateLine(netDxf.Entities.Line line)
{
GeoObject.Line l = GeoObject.Line.Construct();
Vector3 sp = line.StartPoint;
Vector3 ep = line.EndPoint;
{
l.StartPoint = GeoPoint(sp);
l.EndPoint = GeoPoint(ep);
double th = line.Thickness;
GeoVector no = GeoVector(line.Normal);
if (th != 0.0 && !no.IsNullVector())
{
if (l.Length < Precision.eps)
{
l.EndPoint += th * no;
return l;
}
else
{
return Make3D.Extrude(l, th * no, null);
}
}
return l;
}
}
private IGeoObject CreateRay(Ray ray)
{
GeoObject.Line l = GeoObject.Line.Construct();
Vector3 sp = ray.Origin;
Vector3 dir = ray.Direction;
l.StartPoint = GeoPoint(sp);
l.EndPoint = l.StartPoint + GeoVector(dir);
return l;
}
private IGeoObject CreateArc(Arc arc)
{
GeoObject.Ellipse e = GeoObject.Ellipse.Construct();
GeoVector nor = GeoVector(arc.Normal);
GeoPoint cnt = GeoPoint(arc.Center);
Plane plane = Plane(arc.Center, arc.Normal);
double start = Angle.Deg(arc.StartAngle);
double end = Angle.Deg(arc.EndAngle);
double sweep = end - start;
if (sweep < 0.0) sweep += Math.PI * 2.0;
// if (sweep < Precision.epsa) sweep = Math.PI * 2.0;
if (start == end) sweep = 0.0;
if (start == Math.PI * 2.0 && end == 0.0) sweep = 0.0; // see in modena.dxf
// Arcs are always counterclockwise, but maybe the normal is (0,0,-1) in 2D drawings.
e.SetArcPlaneCenterRadiusAngles(plane, GeoPoint(arc.Center), arc.Radius, start, sweep);
if (sweep != 0.0 && Math.Abs(sweep / arc.Radius) < 1e-7)
{ // is there a good example for making a line instead of an arc?
//Line l = Line.Construct();
//l.SetTwoPoints(GeoPoint(arc.StartPoint), GeoPoint(arc.EndPoint));
//return l;
}
double th = arc.Thickness;
if (th != 0.0 && !nor.IsNullVector())
{
return Make3D.Extrude(e, th * nor, null);
}
return e;
}
private IGeoObject CreateCircle(netDxf.Entities.Circle circle)
{
GeoObject.Ellipse e = GeoObject.Ellipse.Construct();
Plane plane = Plane(circle.Center, circle.Normal);
e.SetCirclePlaneCenterRadius(plane, GeoPoint(circle.Center), circle.Radius);
double th = circle.Thickness;
GeoVector no = GeoVector(circle.Normal);
if (th != 0.0 && !no.IsNullVector())
{
return Make3D.Extrude(e, th * no, null);
}
return e;
}
private IGeoObject CreateEllipse(netDxf.Entities.Ellipse ellipse)
{
GeoObject.Ellipse e = GeoObject.Ellipse.Construct();
Plane plane = Plane(ellipse.Center, ellipse.Normal);
ModOp2D rot = ModOp2D.Rotate(Angle.Deg(ellipse.Rotation));
GeoVector2D majorAxis = 0.5 * ellipse.MajorAxis * (rot * GeoVector2D.XAxis);
GeoVector2D minorAxis = 0.5 * ellipse.MinorAxis * (rot * GeoVector2D.YAxis);
e.SetEllipseCenterAxis(GeoPoint(ellipse.Center), plane.ToGlobal(majorAxis), plane.ToGlobal(minorAxis));
Vector2 startPoint = ellipse.PolarCoordinateRelativeToCenter(ellipse.StartAngle);
double sp = CalcStartEndParameter(startPoint, ellipse.MajorAxis, ellipse.MinorAxis);
Vector2 endPoint = ellipse.PolarCoordinateRelativeToCenter(ellipse.EndAngle);
double ep = CalcStartEndParameter(endPoint, ellipse.MajorAxis, ellipse.MinorAxis);
e.StartParameter = sp;
e.SweepParameter = ep - sp;
if (e.SweepParameter == 0.0) e.SweepParameter = Math.PI * 2.0;
if (e.SweepParameter < 0.0) e.SweepParameter += Math.PI * 2.0; // seems it is always counterclockwise
// it looks like clockwise 2d ellipses are defined with normal vector (0, 0, -1)
return e;
}
private double CalcStartEndParameter(Vector2 startEndPoint, double majorAxis, double minorAxis)
{
double a = 1 / (0.5 * majorAxis);
double b = 1 / (0.5 * minorAxis);
double parameter = Math.Atan2(startEndPoint.Y * b, startEndPoint.X * a);
return parameter;
}
private IGeoObject CreateSpline(netDxf.Entities.Spline spline)
{
int degree = spline.Degree;
if (spline.ControlPoints.Length == 0 && spline.FitPoints.Count > 0)
{
BSpline bsp = BSpline.Construct();
GeoPoint[] fp = new GeoPoint[spline.FitPoints.Count];
for (int i = 0; i < fp.Length; i++)
{
fp[i] = GeoPoint(spline.FitPoints[i]);
}
bsp.ThroughPoints(fp, spline.Degree, spline.IsClosed);
return bsp;
}
else
{
GeoPoint[] poles = new GeoPoint[spline.ControlPoints.Length];
double[] weights = new double[spline.ControlPoints.Length];
for (int i = 0; i < poles.Length; i++)
{
poles[i] = GeoPoint(spline.ControlPoints[i]);
weights[i] = spline.Weights[i];
}
double[] kn = new double[spline.Knots.Length];
for (int i = 0; i < kn.Length; ++i)
{
kn[i] = spline.Knots[i];
}
if (poles.Length == 2 && degree > 1)
{ // damit geht kein vernünftiger Spline, höchstens mit degree=1
GeoObject.Line l = GeoObject.Line.Construct();
l.StartPoint = poles[0];
l.EndPoint = poles[1];
return l;
}
BSpline bsp = BSpline.Construct();
//TODO: Can Periodic spline be not closed?
if (bsp.SetData(degree, poles, weights, kn, null, spline.IsClosedPeriodic))
{
// BSplines with inner knots of multiplicity degree+1 make problems, because the spline have no derivative at these points
// so we split these splines
List<int> splitKnots = new List<int>();
for (int i = degree+1; i < kn.Length - degree-1; i++)
{
if (kn[i] == kn[i - 1])
{
bool sameKnot = true;
for (int j = 0; j < degree; j++)
{
if (kn[i - 1] != kn[i + j]) sameKnot = false;
}
if (sameKnot) splitKnots.Add(i - 1);
}
}
if (splitKnots.Count>0)
{
List<ICurve> parts = new List<ICurve>();
BSpline part = bsp.TrimParam(kn[0], kn[splitKnots[0]]);
if (CADability.GeoPoint.Distance(part.Poles) > Precision.eps && (part as ICurve).Length > Precision.eps) parts.Add(part);
for (int i = 1; i < splitKnots.Count; i++)
{
part = bsp.TrimParam(kn[splitKnots[i-1]], kn[splitKnots[i]]);
if (CADability.GeoPoint.Distance(part.Poles) > Precision.eps && (part as ICurve).Length>Precision.eps) parts.Add(part);
}
part = bsp.TrimParam(kn[splitKnots[splitKnots.Count - 1]], kn[kn.Length - 1]);
if (CADability.GeoPoint.Distance(part.Poles)>Precision.eps && (part as ICurve).Length > Precision.eps) parts.Add(part);
GeoObject.Path path = GeoObject.Path.Construct();
path.Set(parts.ToArray());
return path;
}
// if (spline.IsPeriodic) bsp.IsClosed = true; // to remove strange behavior in hünfeld.dxf
return bsp;
}
// strange spline in "bspline-closed-periodic.dxf"
}
return null;
}
private IGeoObject CreateFace(netDxf.Entities.Face3D face)
{
List<GeoPoint> points = new List<GeoPoint>();
GeoPoint p = GeoPoint(face.FirstVertex);
points.Add(p);
p = GeoPoint(face.SecondVertex);
if (points[points.Count - 1] != p) points.Add(p);
p = GeoPoint(face.ThirdVertex);
if (points[points.Count - 1] != p) points.Add(p);
p = GeoPoint(face.FourthVertex);
if (points[points.Count - 1] != p) points.Add(p);
if (points.Count == 3)
{
Plane pln = new Plane(points[0], points[1], points[2]);
PlaneSurface surf = new PlaneSurface(pln);
Border bdr = new Border(new GeoPoint2D[] { new GeoPoint2D(0.0, 0.0), pln.Project(points[1]), pln.Project(points[2]) });
SimpleShape ss = new SimpleShape(bdr);
Face fc = Face.MakeFace(surf, ss);
return fc;
}
else if (points.Count == 4)
{
Plane pln = CADability.Plane.FromPoints(points.ToArray(), out double maxDist, out bool isLinear);
if (!isLinear)
{
if (maxDist > Precision.eps)
{
Face fc1 = Face.MakeFace(points[0], points[1], points[2]);
Face fc2 = Face.MakeFace(points[0], points[2], points[3]);
GeoObject.Block blk = GeoObject.Block.Construct();
blk.Set(new GeoObjectList(fc1, fc2));
return blk;
}
else
{
PlaneSurface surf = new PlaneSurface(pln);
Border bdr = new Border(new GeoPoint2D[] { pln.Project(points[0]), pln.Project(points[1]), pln.Project(points[2]), pln.Project(points[3]) });
double[] sis = bdr.GetSelfIntersection(Precision.eps);
if (sis.Length > 0)
{
// multiple of three values: parameter1, parameter2, crossproduct of intersection direction
// there can only be one intersection
Border[] splitted = bdr.Split(new double[] { sis[0], sis[1] });
for (int i = 0; i < splitted.Length; i++)
{
if (splitted[i].IsClosed) bdr = splitted[i];
}
}
SimpleShape ss = new SimpleShape(bdr);
Face fc = Face.MakeFace(surf, ss);
return fc;
}
}
}
return null;
}
private IGeoObject CreatePolyfaceMesh(netDxf.Entities.PolyfaceMesh polyfacemesh)
{
polyfacemesh.Explode();
GeoPoint[] vertices = new GeoPoint[polyfacemesh.Vertexes.Length];
for (int i = 0; i < vertices.Length; i++)
{
vertices[i] = GeoPoint(polyfacemesh.Vertexes[i]); // there is more information, I would need a good example
}
List<Face> faces = new List<Face>();
for (int i = 0; i < polyfacemesh.Faces.Count; i++)
{
short[] indices = polyfacemesh.Faces[i].VertexIndexes;
for (int j = 0; j < indices.Length; j++)
{
indices[j] = (short)(Math.Abs(indices[j]) - 1); // why? what does it mean?
}
if (indices.Length <= 3 || indices[3] == indices[2])
{
if (indices[0] != indices[1] && indices[1] != indices[2])
{
Plane pln = new Plane(vertices[indices[0]], vertices[indices[1]], vertices[indices[2]]);
PlaneSurface surf = new PlaneSurface(pln);
Border bdr = new Border(new GeoPoint2D[] { new GeoPoint2D(0.0, 0.0), pln.Project(vertices[indices[1]]), pln.Project(vertices[indices[2]]) });
SimpleShape ss = new SimpleShape(bdr);
Face fc = Face.MakeFace(surf, ss);
faces.Add(fc);
}
}
else
{
if (indices[0] != indices[1] && indices[1] != indices[2])
{
Plane pln = new Plane(vertices[indices[0]], vertices[indices[1]], vertices[indices[2]]);
PlaneSurface surf = new PlaneSurface(pln);
Border bdr = new Border(new GeoPoint2D[] { new GeoPoint2D(0.0, 0.0), pln.Project(vertices[indices[1]]), pln.Project(vertices[indices[2]]) });
SimpleShape ss = new SimpleShape(bdr);
Face fc = Face.MakeFace(surf, ss);
faces.Add(fc);
}
if (indices[2] != indices[3] && indices[3] != indices[0])
{
Plane pln = new Plane(vertices[indices[2]], vertices[indices[3]], vertices[indices[0]]);
PlaneSurface surf = new PlaneSurface(pln);
Border bdr = new Border(new GeoPoint2D[] { new GeoPoint2D(0.0, 0.0), pln.Project(vertices[indices[3]]), pln.Project(vertices[indices[0]]) });
SimpleShape ss = new SimpleShape(bdr);
Face fc = Face.MakeFace(surf, ss);
faces.Add(fc);
}
}
}
if (faces.Count > 1)
{
GeoObjectList sewed = Make3D.SewFacesAndShells(new GeoObjectList(faces.ToArray() as IGeoObject[]));
return sewed[0];
}
else if (faces.Count == 1)
{
return faces[0];
}
else return null;
}
private IGeoObject CreateHatch(netDxf.Entities.Hatch hatch)
{
CompoundShape cs = null;
bool ok = true;
List<ICurve2D> allCurves = new List<ICurve2D>();
Plane pln = CADability.Plane.XYPlane;
for (int i = 0; i < hatch.BoundaryPaths.Count; i++)
{
// System.Diagnostics.Trace.WriteLine("Loop: " + i.ToString());
//OdDbHatch.HatchLoopType.kExternal
// hatch.BoundaryPaths[i].PathType
List<ICurve> boundaryEntities = new List<ICurve>();
for (int j = 0; j < hatch.BoundaryPaths[i].Edges.Count; j++)
{
IGeoObject ent = GeoObjectFromEntity(hatch.BoundaryPaths[i].Edges[j].ConvertTo());
if (ent is ICurve crv) boundaryEntities.Add(crv);
}
//for (int j = 0; j < hatch.BoundaryPaths[i].Entities.Count; j++)
//{
// IGeoObject ent = GeoObjectFromEntity(hatch.BoundaryPaths[i].Entities[j]);
// if (ent is ICurve crv) boundaryEntities.Add(crv);
//}
if (i == 0)
{
if (!Curves.GetCommonPlane(boundaryEntities, out pln)) return null; // there must be a common plane
}
ICurve2D[] bdr = new ICurve2D[boundaryEntities.Count];
for (int j = 0; j < bdr.Length; j++)
{
bdr[j] = boundaryEntities[j].GetProjectedCurve(pln);
}
try
{
Border border = Border.FromUnorientedList(bdr, true);
HatchBoundaryPathTypeFlags flag = hatch.BoundaryPaths[i].PathType;
allCurves.AddRange(bdr);
if (border != null)
{
SimpleShape ss = new SimpleShape(border);
if (cs == null)
{
cs = new CompoundShape(ss);
}
else
{
CompoundShape cs1 = new CompoundShape(ss);
double a = cs.Area;
cs = cs - new CompoundShape(ss); // assuming the first border is the outer bound followed by holes
if (cs.Area >= a) ok = false; // don't know how to descriminate between outer bounds and holes
}
}
}
catch (BorderException)
{
}
}
if (cs != null)
{
if (cs.Area == 0.0 || !ok)
{ // try to make something usefull from the curves
cs = CompoundShape.CreateFromList(allCurves.ToArray(), Precision.eps);
if (cs == null || cs.Area == 0.0) return null;
}
GeoObject.Hatch res = GeoObject.Hatch.Construct();
res.CompoundShape = cs;
res.Plane = pln;
if (hatch.Pattern.Fill == HatchFillType.SolidFill)
{
HatchStyleSolid hst = FindOrCreateSolidHatchStyle(hatch.Layer.Color.ToColor());
res.HatchStyle = hst;
return res;
}
else
{
List<GeoObject.Hatch> list = new List<GeoObject.Hatch>();
for (int i = 0; i < hatch.Pattern.LineDefinitions.Count; i++)
{
if (i > 0) res = res.Clone() as GeoObject.Hatch;
double lineAngle = Angle.Deg(hatch.Pattern.LineDefinitions[i].Angle);
double baseX = hatch.Pattern.LineDefinitions[i].Origin.X;
double baseY = hatch.Pattern.LineDefinitions[i].Origin.Y;
double offsetX = hatch.Pattern.LineDefinitions[i].Delta.X;
double offsetY = hatch.Pattern.LineDefinitions[i].Delta.Y;
double[] dashes = hatch.Pattern.LineDefinitions[i].DashPattern.ToArray();
HatchStyleLines hsl = FindOrCreateHatchStyleLines(hatch, lineAngle, Math.Sqrt(offsetX * offsetX + offsetY * offsetY), dashes);
res.HatchStyle = hsl;
list.Add(res);
}
if (list.Count > 1)
{
GeoObject.Block block = GeoObject.Block.Construct();
block.Set(new GeoObjectList(list as ICollection<IGeoObject>));
return block;
}
else return res;
}
}
else
{
return null;
}
}
private IGeoObject CreateSolid(netDxf.Entities.Solid solid)
{
Plane ocs = Plane(new Vector3(solid.Elevation * solid.Normal.X, solid.Elevation * solid.Normal.Y, solid.Elevation * solid.Normal.Z), solid.Normal);
// not sure, whether the ocs is correct, maybe the position is (0,0,solid.Elevation)
HatchStyleSolid hst = FindOrCreateSolidHatchStyle(solid.Color.ToColor());
List<GeoPoint> points = new List<GeoPoint>();
points.Add(ocs.ToGlobal(new GeoPoint2D(solid.FirstVertex.X, solid.FirstVertex.Y)));
points.Add(ocs.ToGlobal(new GeoPoint2D(solid.SecondVertex.X, solid.SecondVertex.Y)));
points.Add(ocs.ToGlobal(new GeoPoint2D(solid.ThirdVertex.X, solid.ThirdVertex.Y)));
points.Add(ocs.ToGlobal(new GeoPoint2D(solid.FourthVertex.X, solid.FourthVertex.Y)));
for (int i = 3; i > 0; --i)
{ // gleiche Punkte wegmachen
for (int j = 0; j < i; ++j)
{
if (Precision.IsEqual(points[j], points[i]))
{
points.RemoveAt(i);
break;
}
}
}
if (points.Count < 3) return null;
Plane pln;
try
{
pln = new Plane(points[0], points[1], points[2]);
}
catch (PlaneException)
{
return null;
}
GeoPoint2D[] vertex = new GeoPoint2D[points.Count + 1];
for (int i = 0; i < points.Count; ++i) vertex[i] = pln.Project(points[i]);
vertex[points.Count] = vertex[0];
Curve2D.Polyline2D poly2d = new Curve2D.Polyline2D(vertex);
Border bdr = new Border(poly2d);
CompoundShape cs = new CompoundShape(new SimpleShape(bdr));
GeoObject.Hatch hatch = GeoObject.Hatch.Construct();
hatch.CompoundShape = cs;
hatch.HatchStyle = hst;
hatch.Plane = pln;
return hatch;
}
private IGeoObject CreateInsert(netDxf.Entities.Insert insert)
{
// could also use insert.Explode()
GeoObject.Block block = FindBlock(insert.Block);
if (block != null)
{
IGeoObject res = block.Clone();
ModOp tranform = ModOp.Translate(GeoVector(insert.Position)) *
//ModOp.Translate(block.RefPoint.ToVector()) *
ModOp.Rotate(CADability.GeoVector.ZAxis, SweepAngle.Deg(insert.Rotation)) *
ModOp.Scale(insert.Scale.X, insert.Scale.Y, insert.Scale.Z) *
ModOp.Translate(CADability.GeoPoint.Origin - block.RefPoint);
res.Modify(tranform);
return res;
}
return null;
}
private IGeoObject CreatePolyline2D(netDxf.Entities.Polyline2D polyline2D)
{
List<EntityObject> exploded = polyline2D.Explode();
List<IGeoObject> path = new List<IGeoObject>();
for (int i = 0; i < exploded.Count; i++)
{
IGeoObject ent = GeoObjectFromEntity(exploded[i]);
if (ent != null) path.Add(ent);
}
GeoObject.Path go = GeoObject.Path.Construct();
go.Set(new GeoObjectList(path), false, 1e-6);
if (go.CurveCount > 0) return go;
return null;
}
private IGeoObject CreateMLine(netDxf.Entities.MLine mLine)
{
List<EntityObject> exploded = mLine.Explode();
List<IGeoObject> path = new List<IGeoObject>();
for (int i = 0; i < exploded.Count; i++)
{
IGeoObject ent = GeoObjectFromEntity(exploded[i]);
if (ent != null) path.Add(ent);
}
GeoObjectList list = new GeoObjectList(path);
GeoObjectList res = new GeoObjectList();
while (list.Count > 0)
{
GeoObject.Path go = GeoObject.Path.Construct();
if (go.Set(list, true, 1e-6))
{
res.Add(go);
}
else
{
break;
}
}
if (res.Count > 1)
{
GeoObject.Block blk = GeoObject.Block.Construct();
blk.Name = "MLINE " + mLine.Handle;
blk.Set(res);
return blk;
}
else if (res.Count == 1) return res[0];
else return null;
return null;
}
private string processAcadString(string acstr)
{
StringBuilder sb = new StringBuilder(acstr);
sb.Replace("%%153", "Ø");
sb.Replace("%%127", "°");
sb.Replace("%%214", "Ö");
sb.Replace("%%220", "Ü");
sb.Replace("%%228", "ä");
sb.Replace("%%246", "ö");
sb.Replace("%%223", "ß");
sb.Replace("%%u", ""); // underline
sb.Replace("%%U", "");
sb.Replace("%%D", "°");
sb.Replace("%%d", "°");
sb.Replace("%%P", "±");
sb.Replace("%%p", "±");
sb.Replace("%%C", "Ø");
sb.Replace("%%c", "Ø");
sb.Replace("%%%", "%");
// and maybe some more, is there a documentation?
return sb.ToString();
}
private IGeoObject CreateText(netDxf.Entities.Text txt)
{
GeoObject.Text text = GeoObject.Text.Construct();
string txtstring = processAcadString(txt.Value);
if (txtstring.Trim().Length == 0) return null;
string filename;
string name;
string typeface;
bool bold;
bool italic;
filename = txt.Style.FontFamilyName;
if (string.IsNullOrEmpty(filename)) filename = txt.Style.FontFile;
name = txt.Style.Name;
typeface = "";
bold = txt.Style.FontStyle.HasFlag(netDxf.Tables.FontStyle.Bold);
italic = txt.Style.FontStyle.HasFlag(netDxf.Tables.FontStyle.Italic);
GeoPoint pos = GeoPoint(txt.Position);
Angle a = Angle.Deg(txt.Rotation);
double h = txt.Height;
Plane plane = Plane(txt.Position, txt.Normal);
bool isShx = false;
if (typeface.Length > 0)
{
text.Font = typeface;
}
else
{
if (filename.EndsWith(".shx") || filename.EndsWith(".SHX"))
{
filename = filename.Substring(0, filename.Length - 4);
isShx = true;
}
if (filename.EndsWith(".ttf") || filename.EndsWith(".TTF"))
{
if (name != null && name.Length > 1) filename = name;
else filename = filename.Substring(0, filename.Length - 4);
}
text.Font = filename;
}
text.Bold = bold;
text.Italic = italic;
text.TextString = txtstring;
text.Location = CADability.GeoPoint.Origin;
text.LineDirection = h * CADability.GeoVector.XAxis; //plane.ToGlobal(new GeoVector2D(a));
text.GlyphDirection = h * CADability.GeoVector.YAxis; // plane.ToGlobal(new GeoVector2D(a + SweepAngle.ToLeft));
text.TextSize = h;
text.Alignment = GeoObject.Text.AlignMode.Bottom;
text.LineAlignment = GeoObject.Text.LineAlignMode.Left;
switch (txt.Alignment)
{
case TextAlignment.Aligned:
case TextAlignment.Fit: // fit in width or height: not implemented
text.LineAlignment = GeoObject.Text.LineAlignMode.Left;
text.Alignment = GeoObject.Text.AlignMode.Baseline;
break;
case TextAlignment.BaselineLeft:
text.LineAlignment = GeoObject.Text.LineAlignMode.Left;
text.Alignment = GeoObject.Text.AlignMode.Baseline;
break;
case TextAlignment.BaselineCenter:
text.LineAlignment = GeoObject.Text.LineAlignMode.Center;
text.Alignment = GeoObject.Text.AlignMode.Baseline;
break;
case TextAlignment.BaselineRight:
text.LineAlignment = GeoObject.Text.LineAlignMode.Right;
text.Alignment = GeoObject.Text.AlignMode.Baseline;
break;
case TextAlignment.BottomLeft:
text.LineAlignment = GeoObject.Text.LineAlignMode.Left;
text.Alignment = GeoObject.Text.AlignMode.Bottom;
break;
case TextAlignment.BottomCenter:
text.LineAlignment = GeoObject.Text.LineAlignMode.Center;
text.Alignment = GeoObject.Text.AlignMode.Bottom;
break;
case TextAlignment.BottomRight:
text.LineAlignment = GeoObject.Text.LineAlignMode.Right;
text.Alignment = GeoObject.Text.AlignMode.Bottom;
break;
case TextAlignment.MiddleLeft:
text.LineAlignment = GeoObject.Text.LineAlignMode.Left;
text.Alignment = GeoObject.Text.AlignMode.Center;
break;
case TextAlignment.Middle:
case TextAlignment.MiddleCenter:
text.LineAlignment = GeoObject.Text.LineAlignMode.Center;
text.Alignment = GeoObject.Text.AlignMode.Center;
break;
case TextAlignment.MiddleRight:
text.LineAlignment = GeoObject.Text.LineAlignMode.Right;
text.Alignment = GeoObject.Text.AlignMode.Center;
break;
case TextAlignment.TopLeft:
text.LineAlignment = GeoObject.Text.LineAlignMode.Left;
text.Alignment = GeoObject.Text.AlignMode.Top;
break;
case TextAlignment.TopCenter:
text.LineAlignment = GeoObject.Text.LineAlignMode.Center;
text.Alignment = GeoObject.Text.AlignMode.Top;
break;
case TextAlignment.TopRight:
text.LineAlignment = GeoObject.Text.LineAlignMode.Right;
text.Alignment = GeoObject.Text.AlignMode.Top;
break;
}
// h /= GetFontScaling(text.Font, fnt);
text.Location = GeoPoint(txt.Position);
GeoVector2D dir2d = new GeoVector2D(a);
GeoVector linedir = plane.ToGlobal(dir2d);
GeoVector glyphdir = plane.ToGlobal(dir2d.ToLeft());
text.LineDirection = linedir;
text.GlyphDirection = glyphdir;
text.TextSize = h;
//if (isShx) h *= AdditionalShxFactor(text.Font);
linedir.Length = h * txt.WidthFactor;
if (!linedir.IsNullVector()) text.LineDirection = linedir;
if (text.TextSize < 1e-5) return null;
return text;
}
private IGeoObject CreateDimension(netDxf.Entities.Dimension dimension)