/// <summary>
/// 三点绘制圆弧
/// </summary>
/// <param name="db">图形数据库</param>
/// <param name="startPoint3d">起点坐标</param>
/// <param name="pointOnArc">圆弧上的点</param>
/// <param name="endPoint3d">重点坐标</param>
/// <returns></returns>
public static ObjectId AddArcToModelSpace(this Database db, Point3d startPoint3d, Point3d pointOnArc, Point3d endPoint3d)
{
//判断三点是否在同一条直线上
if (startPoint3d.IsOnOneLine(pointOnArc, endPoint3d))
{
Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
ed.WriteMessage("3个顶点在同一条直线上，无法绘制圆弧");
return(ObjectId.Null);
}
//创建几何对象
CircularArc3d CArc = new CircularArc3d(startPoint3d, pointOnArc, endPoint3d);
//获取几何对象的属性
double radius = CArc.Radius; //半径
Point3d conter = CArc.Center; //圆心
//Vector3d cs = conter.GetVectorTo(startPoint3d);//圆心与第一个点构成向量
//Vector3d ce = conter.GetVectorTo(endPoint3d);//圆心与第二个点构成向量
//Vector3d xVector = new Vector3d(1, 0, 0);//X正方向的向量
////获取角度
//double startAngle = cs.Y>0 ? xVector.GetAngleTo(cs): -xVector.GetAngleTo(cs);//圆心与第一个点的角度
//double endAngle = ce.Y>0 ? xVector.GetAngleTo(ce): -xVector.GetAngleTo(ce);//圆心与第二个点的角度
//获取角度
double startAngle = conter.GetAngle(startPoint3d);
double endAngle = conter.GetAngle(endPoint3d);
//创建圆弧对象
Arc arc = new Arc(conter, radius, startAngle, endAngle);
return(AddEntityToModelSpace(db, arc));//添加到图形数据库中
}
public static CircularArc3d ConvertToCircularArc(this Arc arc)
{
Vector3d vector = arc.StartPoint - arc.Center;
CircularArc3d arc3d = new CircularArc3d(arc.Center, arc.Normal, vector.Normalize(), arc.Radius, 0d, arc.EndAngle - arc.StartAngle);
return(arc3d);
}
/// <summary>
/// Returns the tangents between the active CircularArc3d instance complete circle and a point.
/// </summary>
/// <remarks>
/// Tangents start points are on the object to which this method applies, end points on the point passed as argument.
/// Tangents are always returned in the same order: the tangent on the left side of the line from the circular arc center
/// to the point before the one on the right side.
/// </remarks>
/// <param name="arc">The instance to which this method applies.</param>
/// <param name="pt">The Point3d to which tangents are searched</param>
/// <returns>An array of LineSegement3d representing the tangents (2) or null if there is none.</returns>
/// <exception cref="Autodesk.AutoCAD.Runtime.Exception">
/// eNonCoplanarGeometry is thrown if the objects do not lies on the same plane.</exception>
public static LineSegment3d[]? GetTangentsTo([NotNull] this CircularArc3d arc, Point3d pt)
{
// check if arc and point lies on the plane
var normal = arc.Normal;
var WCS2OCS = Matrix3d.WorldToPlane(normal);
var elevation = arc.Center.TransformBy(WCS2OCS).Z;
if (Math.Abs(elevation - pt.TransformBy(WCS2OCS).Z) < Tolerance.Global.EqualPoint)
{
throw new Autodesk.AutoCAD.Runtime.Exception(
Autodesk.AutoCAD.Runtime.ErrorStatus.NonCoplanarGeometry);
}
var plane = new Plane(Point3d.Origin, normal);
var ca2d = new CircularArc2d(arc.Center.Convert2d(plane), arc.Radius);
var lines2d = ca2d.GetTangentsTo(pt.Convert2d(plane));
if (lines2d == null)
{
return(null);
}
var result = new LineSegment3d[lines2d.Length];
for (var i = 0; i < lines2d.Length; i++)
{
var ls2d = lines2d[i];
result[i] = new LineSegment3d(ls2d.StartPoint.Convert3d(normal, elevation),
ls2d.EndPoint.Convert3d(normal, elevation));
}
return(result);
}
public static IEnumerable <IntersectionInfo> IntersectArcs(Arc source, ExtendType?coerceSourceExtendType, Arc target, ExtendType?coerceTargetExtendType)
{
var points = new Point3dCollection();
source.IntersectWith(target, Intersect.ExtendBoth, points, IntPtr.Zero, IntPtr.Zero);
if (points.Count <= 0)
{
return(new IntersectionInfo[0]);
}
// NOTE: Use Arc's GetParameterAtPoint will throw exception if the intersect point is
// on the Arc's extension, but CircularArc3d.GetParameterOf is available, so I convert
// the Arc to CircularArc3d here.
var sourceArc = new CircularArc3d(source.Center, source.Normal, source.Normal.GetPerpendicularVector(),
source.Radius, source.StartAngle, source.EndAngle);
var targetArc = new CircularArc3d(target.Center, target.Normal, target.Normal.GetPerpendicularVector(),
target.Radius, target.StartAngle, target.EndAngle);
var result = new List <IntersectionInfo>();
foreach (Point3d point in points)
{
var sourceParam = sourceArc.GetParameterOf(point);
var sourceExtendType = ParamToExtendTypeForArc(sourceArc, sourceParam, coerceSourceExtendType);
var targetParam = targetArc.GetParameterOf(point);
var targetExtendType = ParamToExtendTypeForArc(targetArc, targetParam, coerceTargetExtendType);
}
return(result);
}
/// <summary>
/// Returns the tangents between the active CircularArc3d instance complete circle and another one.
/// </summary>
/// <remarks>
/// Tangents start points are on the object to which this method applies, end points on the one passed as argument.
/// Tangents are always returned in the same order: outer tangents before inner tangents, and for both,
/// the tangent on the left side of the line from this circular arc center to the other one before the one on the right side.
/// </remarks>
/// <param name="arc">The instance to which this method applies.</param>
/// <param name="other">The CircularArc3d to which searched for tangents.</param>
/// <param name="flags">An enum value specifying which type of tangent is returned.</param>
/// <returns>An array of LineSegment3d representing the tangents (maybe 2 or 4) or null if there is none.</returns>
/// <exception cref="Autodesk.AutoCAD.Runtime.Exception">
/// eNonCoplanarGeometry is thrown if the objects do not lies on the same plane.</exception>
public static LineSegment3d[] GetTangentsTo(this CircularArc3d arc, CircularArc3d other, TangentType flags)
{
// check if circles lies on the same plane
Vector3d normal = arc.Normal;
Matrix3d WCS2OCS = Matrix3d.WorldToPlane(normal);
double elevation = arc.Center.TransformBy(WCS2OCS).Z;
if (!(normal.IsParallelTo(other.Normal) &&
Math.Abs(elevation - other.Center.TransformBy(WCS2OCS).Z) < Tolerance.Global.EqualPoint))
{
throw new Autodesk.AutoCAD.Runtime.Exception(
Autodesk.AutoCAD.Runtime.ErrorStatus.NonCoplanarGeometry);
}
Plane plane = new Plane(Point3d.Origin, normal);
Matrix3d OCS2WCS = Matrix3d.PlaneToWorld(plane);
CircularArc2d ca2d1 = new CircularArc2d(arc.Center.Convert2d(plane), arc.Radius);
CircularArc2d ca2d2 = new CircularArc2d(other.Center.Convert2d(plane), other.Radius);
LineSegment2d[] lines2d = ca2d1.GetTangentsTo(ca2d2, flags);
if (lines2d == null)
{
return(null);
}
LineSegment3d[] result = new LineSegment3d[lines2d.Length];
for (int i = 0; i < lines2d.Length; i++)
{
LineSegment2d ls2d = lines2d[i];
result[i] = new LineSegment3d(ls2d.StartPoint.Convert3d(normal, elevation), ls2d.EndPoint.Convert3d(normal, elevation));
}
return(result);
}
/// <summary>
/// Returns the tangents between the active CircularArc3d instance complete circle and a point.
/// </summary>
/// <remarks>
/// Tangents start points are on the object to which this method applies, end points on the point passed as argument.
/// Tangents are always returned in the same order: the tangent on the left side of the line from the circular arc
/// center
/// to the point before the one on the right side.
/// </remarks>
/// <param name="arc">The instance to which this method applies.</param>
/// <param name="pt">The Point3d to which tangents are searched</param>
/// <returns>An array of LineSegement3d representing the tangents (2) or null if there is none.</returns>
/// <exception cref="Autodesk.AutoCAD.Runtime.Exception">
/// eNonCoplanarGeometry is thrown if the objects do not lies on the same plane.
/// </exception>
public static LineSegment3d[] GetTangentsTo(this CircularArc3d arc, Point3d pt)
{
// check if arc and point lies on the plane
var normal = arc.Normal;
var wcs2Ocs = Matrix3d.WorldToPlane(normal);
var elevation = arc.Center.TransformBy(wcs2Ocs).Z;
if (Math.Abs(elevation - pt.TransformBy(wcs2Ocs).Z) < Tolerance.Global.EqualPoint)
{
throw new Exception(
ErrorStatus.NonCoplanarGeometry);
}
var plane = new Plane(Point3d.Origin, normal);
_ = Matrix3d.PlaneToWorld(plane);
var ca2D = new CircularArc2d(arc.Center.Convert2d(plane), arc.Radius);
var lines2D = ca2D.GetTangentsTo(pt.Convert2d(plane));
if (lines2D == null)
{
return(null);
}
var result = new LineSegment3d[lines2D.Length];
for (var i = 0; i < lines2D.Length; i++)
{
var ls2D = lines2D[i];
result[i] = new LineSegment3d(ls2D.StartPoint.Convert3D(normal, elevation),
ls2D.EndPoint.Convert3D(normal, elevation));
}
return(result);
}
/// <summary>Создание дуг</summary>
private void CreateArcs(XElement root, Transaction tr, BlockTableRecord btr)
{
foreach (XElement curveXelement in root.Elements("Arc"))
{
XElement startPointXElement = curveXelement.Element("StartPoint");
Point3d startPoint = startPointXElement.GetAsPoint();
XElement endPointXElement = curveXelement.Element("EndPoint");
Point3d endPoint = endPointXElement.GetAsPoint();
XElement pointOnArcXElement = curveXelement.Element("PointOnArc");
Point3d pointOnArc = pointOnArcXElement.GetAsPoint();
// create a CircularArc3d
CircularArc3d carc = new CircularArc3d(startPoint, pointOnArc, endPoint);
// now convert the CircularArc3d to an Arc
Point3d cpt = carc.Center;
Vector3d normal = carc.Normal;
Vector3d refVec = carc.ReferenceVector;
Plane plan = new Plane(cpt, normal);
double ang = refVec.AngleOnPlane(plan);
using (Arc arc = new Arc(cpt, normal, carc.Radius, carc.StartAngle + ang, carc.EndAngle + ang))
{
btr.AppendEntity(arc);
tr.AddNewlyCreatedDBObject(arc, true);
}
// dispose CircularArc3d
carc.Dispose();
}
}
/// <summary>
/// Returns the tangents between the active CircularArc3d instance complete circle and another one.
/// </summary>
/// <remarks>
/// Tangents start points are on the object to which this method applies, end points on the one passed as argument.
/// Tangents are always returned in the same order: outer tangents before inner tangents, and for both,
/// the tangent on the left side of the line from this circular arc center to the other one before the one on the right side.
/// </remarks>
/// <param name="arc">The instance to which this method applies.</param>
/// <param name="other">The CircularArc3d to which searched for tangents.</param>
/// <param name="flags">An enum value specifying which type of tangent is returned.</param>
/// <returns>An array of LineSegment3d representing the tangents (maybe 2 or 4) or null if there is none.</returns>
/// <exception cref="Autodesk.AutoCAD.Runtime.Exception">
/// eNonCoplanarGeometry is thrown if the objects do not lies on the same plane.</exception>
public static LineSegment3d[] GetTangentsTo(this CircularArc3d arc, CircularArc3d other, TangentType flags)
{
// check if circles lies on the same plane
Vector3d normal = arc.Normal;
Matrix3d WCS2OCS = Matrix3d.WorldToPlane(normal);
double elevation = arc.Center.TransformBy(WCS2OCS).Z;
if (!(normal.IsParallelTo(other.Normal) &&
Math.Abs(elevation - other.Center.TransformBy(WCS2OCS).Z) < Tolerance.Global.EqualPoint))
throw new Autodesk.AutoCAD.Runtime.Exception(
Autodesk.AutoCAD.Runtime.ErrorStatus.NonCoplanarGeometry);
Plane plane = new Plane(Point3d.Origin, normal);
Matrix3d OCS2WCS = Matrix3d.PlaneToWorld(plane);
CircularArc2d ca2d1 = new CircularArc2d(arc.Center.Convert2d(plane), arc.Radius);
CircularArc2d ca2d2 = new CircularArc2d(other.Center.Convert2d(plane), other.Radius);
LineSegment2d[] lines2d = ca2d1.GetTangentsTo(ca2d2, flags);
if (lines2d == null)
return null;
LineSegment3d[] result = new LineSegment3d[lines2d.Length];
for (int i = 0; i < lines2d.Length; i++)
{
LineSegment2d ls2d = lines2d[i];
result[i] = new LineSegment3d(ls2d.StartPoint.Convert3d(normal, elevation), ls2d.EndPoint.Convert3d(normal, elevation));
}
return result;
}
public static IEnumerable <IntersectionInfo> IntersectLineArc(Line line, Arc arc, ExtendType?coerceArcExtendType)
{
var points = new Point3dCollection();
line.IntersectWith(arc, Intersect.ExtendBoth, points, IntPtr.Zero, IntPtr.Zero);
if (points.Count <= 0)
{
return(new IntersectionInfo[0]);
}
// NOTE: Use Line's GetParameterAtPoint will throw exception if the intersect point is
// on the line's extension, but LineSegment3d.GetParameterOf is available, so I convert
// the Line to LineSegment3d here.
var lineSegment = new LineSegment3d(line.StartPoint, line.EndPoint);
var circularArc = new CircularArc3d(arc.Center, arc.Normal, arc.Normal.GetPerpendicularVector(), arc.Radius,
arc.StartAngle, arc.EndAngle);
var result = new List <IntersectionInfo>();
foreach (Point3d point in points)
{
var lineParam = lineSegment.GetParameterOf(point);
var lineExtendType = ParamToExtendTypeForLine(lineParam);
var arcParam = circularArc.GetParameterOf(point);
var arcExtendType = ParamToExtendTypeForArc(circularArc, arcParam, coerceArcExtendType);
result.Add(new IntersectionInfo(lineExtendType, arcExtendType, point));
}
return(result);
}
public static ExtendType ParamToExtendTypeForArc(CircularArc3d arc, double param, ExtendType?coerceExtendType)
{
var startParam = arc.GetParameterOf(arc.StartPoint);
var endParam = arc.GetParameterOf(arc.EndPoint);
var result = ExtendType.None;
// If param is in the middle of startParam and endParam
var val = (param - startParam) * (param - endParam);
if (val.SmallerOrEqual(0.0))
{
result = ExtendType.None;
}
else
{
// If coerce extend type is not null.
if (coerceExtendType != null)
{
result = coerceExtendType.Value;
}
else
{
// Determine which distance is shorter.
if (Math.Abs(param - startParam) >= Math.Abs(param - endParam))
{
result = ExtendType.ExtendEnd;
}
else
{
result = ExtendType.ExtendStart;
}
}
}
return(result);
}
/// <summary>
/// 三点画圆弧
/// </summary>
/// <param name="db">数据库对象</param>
/// <param name="startPoint">起点</param>
/// <param name="pointOnArc">圆弧上一点</param>
/// <param name="endPoint">终点</param>
/// <returns></returns>
public static ObjectId AddArcToModeSpace(this Database db, Point3d startPoint, Point3d pointOnArc, Point3d endPoint)
{
// 先判断是否在同一条直线上
if (startPoint.IsOnOneLine(pointOnArc, endPoint))
{
return(ObjectId.Null);
}
// 创建几何对象
CircularArc3d cArc = new CircularArc3d(startPoint, pointOnArc, endPoint);
// 通过几何对象获取其属性
double radius = cArc.Radius; //半径
/**************************************
* Point3d center = cArc.Center; // 所在圆的圆心
* Vector3d cs = center.GetVectorTo(startPoint); // 圆心到起点的向量
* Vector3d ce = center.GetVectorTo(endPoint); // 圆心到终点的向量
* Vector3d xVector = new Vector3d(1, 0, 0); // x正方向的向量
* // 圆弧起始角度
* double startAngle = cs.Y > 0 ? xVector.GetAngleTo(cs) : -xVector.GetAngleTo(cs);
* // 圆弧终止角度
* double endAngle = ce.Y > 0 ? xVector.GetAngleTo(ce) : -xVector.GetAngleTo(ce);
********************************************/
// 创建圆弧对象
Arc arc = new Arc(cArc.Center, cArc.Radius, cArc.Center.GetAngleToXAxis(startPoint), cArc.Center.GetAngleToXAxis(endPoint));
// 加入到图形数据库
return(db.AddEntityToModeSpace(arc));
}
public void DimRadiusArrowStyle()
{
Document doc = Application.DocumentManager.MdiActiveDocument;
Database db = doc.Database;
Editor ed = doc.Editor;
Arc arc = new Arc(); //初始化圆弧
using (Transaction trans = db.TransactionManager.StartTransaction()) //开始事务处理
{
//1.选择圆弧
PromptEntityOptions arcOpt = new PromptEntityOptions("\n选择圆弧");
arcOpt.SetRejectMessage("请选择圆弧对象！");
arcOpt.AddAllowedClass(typeof(Arc), false);
PromptEntityResult arcRes = ed.GetEntity(arcOpt);
if (arcRes.Status != PromptStatus.OK)
{
return;
}
arc = arcRes.ObjectId.GetObject(OpenMode.ForRead) as Arc;
CircularArc3d arc3d = new CircularArc3d(arc.StartPoint, arc.Center.PolarPoint((arc.StartAngle + arc.EndAngle) / 2, arc.Radius), arc.EndPoint);
//2.设置标注比例
PromptDoubleOptions scaleOpt = new PromptDoubleOptions($"\n设置标注比例<{scale}>");
scaleOpt.AllowNegative = false;
scaleOpt.AllowZero = false;
scaleOpt.AllowNone = true;
PromptDoubleResult scaleRes = ed.GetDouble(scaleOpt);
if (scaleRes.Status == PromptStatus.OK)
{
scale = scaleRes.Value;
}
//3.绘制圆弧半径箭头标注
db.ArrowRadiusDim(arc3d, scale);
trans.Commit();//执行事务处理
}
}
private static Curve CreateEdge(double rad, Edge edge, bool createArc)
{
Curve c = null;
if (createArc)
{
// Calculate a mid-point for our arc
var vec = edge.End - edge.Start;
var len = vec.Length;
var vmid = edge.Start + (vec * 0.5);
vec = vec.RotateBy(Math.PI * 0.5, Vector3d.ZAxis);
vec = -0.1 * vec;
var mid = vmid + vec;
// Create the initial arc between the center points of the
// two nodes, as well as circles around the nodes
var ca = new CircularArc3d(edge.Start, mid, edge.End);
var c1 = new CircularArc3d(edge.Start, Vector3d.ZAxis, rad);
var c2 = new CircularArc3d(edge.End, Vector3d.ZAxis, rad);
// Intersect the arc with the two circles
var pts1 = ca.IntersectWith(c1);
var pts2 = ca.IntersectWith(c2);
// Adjust the start and end of the arc, effectively trimming
// it to the circles
var newStart = edge.Start;
var newEnd = edge.End;
if (pts1 != null && pts1.Length > 0)
{
newStart = pts1[0];
}
if (pts2 != null && pts2.Length > 0)
{
newEnd = pts2[0];
}
// Create our new, trimmed arc, and the database version of it
var ca2 = new CircularArc3d(newStart, mid, newEnd);
c = Arc.CreateFromGeCurve(ca2);
}
else
{
// Create the line - adjusted to go from the node circles)
// and add it to the database
var vec = edge.End - edge.Start;
var unit = vec / vec.Length;
c = new Line(edge.Start + unit * rad, edge.End - unit * rad);
}
return(c);
}
public static Polyline ConvertToPolyline([NotNull] this CircularArc3d arc)
{
var poly = new Polyline();
poly.AddVertexAt(0, new Point2d(arc.StartPoint.X, arc.StartPoint.Y), GetBulge(arc), 0, 0);
poly.AddVertexAt(1, new Point2d(arc.EndPoint.X, arc.EndPoint.Y), 0, 0, 0);
return(poly);
}
public static Arc ConvertToArc(this CircularArc3d arc3d)
{
double angle =
arc3d.ReferenceVector.AngleOnPlane(new Plane(arc3d.Center, arc3d.Normal));
Arc arc = new Arc(arc3d.Center, arc3d.Normal, arc3d.Radius, arc3d.StartAngle + angle, arc3d.EndAngle + angle);
return(arc);
}
public CircularArc3d ArcToNative(Arc arc)
{
var _arc = new CircularArc3d(PointToNative(arc.startPoint), PointToNative(arc.midPoint), PointToNative(arc.endPoint));
_arc.SetAxes(VectorToNative(arc.plane.normal), VectorToNative(arc.plane.xdir));
_arc.SetAngles((double)arc.startAngle, (double)arc.endAngle);
return(_arc);
}
//This function gets the 5 points on the passed arc and adds those points
//to passed point array (pointList)
static public void BreakArc(ref Arc arc, ref Point3dCollection pointList)
{
CircularArc3d arcseg = new CircularArc3d(arc.Center, arc.Normal, arc.Normal.GetPerpendicularVector(),
arc.Radius, arc.StartAngle, arc.EndAngle);
var pointArray = arcseg.GetSamplePoints(5);
bool bReverse = false;
//Whether to bReverse the reading of points from line, this case is valid
//only if this function is called for line segment of polyline.
if (pointList.Count > 0)
{
Point3d currentPoint = pointList[pointList.Count - 1];
if (currentPoint != pointArray[0].Point)
{
bReverse = true;
}
}
int nLength = pointArray.Length;
int nIndex = 0;
if (bReverse == false)
{
while (nIndex < nLength)
{
if (pointList.Contains(pointArray[nIndex].Point) == false)
{
pointList.Add(pointArray[nIndex].Point);
DBPoint point = new DBPoint(pointArray[nIndex].Point);
point.ColorIndex = 1;
point.SetDatabaseDefaults();
TGpoints.Add(point);
}
nIndex++;
}
}
else
{
nIndex = nLength;
while (nIndex > 0)
{
nIndex = nIndex - 1;
if (pointList.Contains(pointArray[nIndex].Point) == false)
{
pointList.Add(pointArray[nIndex].Point);
DBPoint point = new DBPoint(pointArray[nIndex].Point);
point.ColorIndex = 1;
point.SetDatabaseDefaults();
TGpoints.Add(point);
}
}
}
}
public static double GetArcBulge(this CircularArc3d arc)
{
double deltaAng = arc.EndAngle - arc.StartAngle;
if (deltaAng < 0)
{
deltaAng += 2 * Math.PI;
}
return(Math.Tan(deltaAng * 0.25));
}
private static Arc CreateFromCircularArc(CircularArc3d circArc)
{
Point3d center = circArc.Center;
Vector3d normal = circArc.Normal;
Vector3d referenceVector = circArc.ReferenceVector;
Plane plane = new Plane(center, normal);
double num = referenceVector.AngleOnPlane(plane);
return(new Arc(center, normal, circArc.Radius, circArc.StartAngle + num, circArc.EndAngle + num));
}
public static Point3d?GetOrthoNormalPointEx(this Polyline pline, Point3d point)
{
point = point.OrthoProject(pline.GetPlane());
List <Point3d> res = new List <Point3d>();
var segments = pline.GetSegments();
foreach (var s in segments)
{
Vector3d vector = point - s.StartPoint;
Vector3d segmVector = s.EndPoint - s.StartPoint;
double cos = segmVector.GetCos2d(vector);
double length = s.GetLength(s.GetParameterOf(s.StartPoint),
s.GetParameterOf(s.EndPoint), Tolerance.Global.EqualPoint);
if (cos >= 0d && cos * vector.Length <= segmVector.Length)
{
if (s is CircularArc3d)
{
CircularArc3d arc = (CircularArc3d)s;
Vector3d central = point - arc.Center;
PointOnCurve3d pointOn = null;
try
{
pointOn = s.GetNormalPoint(point, Tolerance.Global);
}
catch (InvalidOperationException)
{
continue;
}
if (pointOn != null)
{
res.Add(pointOn.Point);
}
}
else if (s is LineSegment3d)
{
LineSegment3d line = (LineSegment3d)s;
Line buffer = new Line(line.StartPoint, line.EndPoint);
res.Add(buffer.GetPointAtDist(cos * vector.Length));
}
}
}
if (res.Count == 0)
{
return(null);
}
else
{
res.Sort((p1, p2) => Comparer <double> .Default.Compare((point - p1).Length, (point - p2).Length));
return(res[0]);
}
}
// Arc
public Arc ArcToSpeckle(CircularArc3d arc)
{
var _arc = new Arc(PlaneToSpeckle(arc.GetPlane()), arc.Radius, arc.StartAngle, arc.EndAngle, Math.Abs(arc.EndAngle - arc.StartAngle), ModelUnits);
_arc.startPoint = PointToSpeckle(arc.StartPoint);
_arc.endPoint = PointToSpeckle(arc.EndPoint);
_arc.domain = IntervalToSpeckle(arc.GetInterval());
_arc.length = arc.GetLength(arc.GetParameterOf(arc.StartPoint), arc.GetParameterOf(arc.EndPoint), tolerance);
_arc.bbox = BoxToSpeckle(arc.OrthoBoundBlock);
return(_arc);
}
public static DTO.ArcPayload ToArcPayload(this CircularArc3d arc)
{
//Whilst AutoCAD has a number of angle display formats, the actual angle unit is the radian.
//Choose the x-axis such that it lies along the line connecting the center of the arc to it's start point (A).
//This way start angle is always 0 as Speckle connectors expect.
var xAxis = Normalize(arc.Center.GetVectorTo(arc.StartPoint));
//Rotate point A by 90 degrees about z to get a point on the y-axis
var pointB = arc.StartPoint.RotateBy(90 * System.Math.PI / 180, arc.Normal, arc.Center);
var yAxis = Normalize(arc.Center.GetVectorTo(pointB));
var arcNormal = Normalize(arc.Normal);
var normalPayload = new DTO.VectorPayload
{
Value = new List <double> {
arcNormal.X, arcNormal.Y, arcNormal.Z
}
};
var planePayload = new DTO.PlanePayload
{
Normal = normalPayload,
Origin = new DTO.PointPayload
{
Value = new List <double> {
arc.Center.X, arc.Center.Y, arc.Center.Z
}
},
XDir = new DTO.VectorPayload
{
Value = new List <double> {
xAxis.X, xAxis.Y, xAxis.Z
}
},
YDir = new DTO.VectorPayload
{
Value = new List <double> {
yAxis.X, yAxis.Y, yAxis.Z
}
},
};
var sweep = GetSweep(arc.StartAngle, arc.EndAngle);
var arcPayload = new DTO.ArcPayload()
{
Plane = planePayload,
Radius = arc.Radius,
StartAngle = 0,
EndAngle = sweep, //EndAngle is also the sweep because start angle is always 0
AngleRadians = sweep
};
return(arcPayload);
}
private static Entity DrawCircularArc(CircularArc arc, double defaultElevation, Point[] densifiedPoints)
{
PointN pointN = arc.FromPoint as PointN;
PointN pointN2 = arc.ToPoint as PointN;
PointN pointN3 = arc.CenterPoint as PointN;
Point3d point3d = new Point3d(pointN.X, pointN.Y, pointN.Z);
Point3d point3d2 = new Point3d(pointN3.X, pointN3.Y, pointN3.Z);
Point3d point3d3 = new Point3d(pointN2.X, pointN2.Y, pointN2.Z);
Point2d centerPoint = new Point2d(pointN3.X, pointN3.Y);
Point2d point2d = new Point2d(pointN.X, pointN.Y);
Math.Abs(centerPoint.GetDistanceTo(point2d));
CircularArc3d circArc;
if (densifiedPoints != null)
{
int num = densifiedPoints.Length / 2;
PointN pointN4 = (PointN)densifiedPoints[num];
if (arc.IsCounterClockwise)
{
PointN arg_CC_0 = (PointN)densifiedPoints[0];
PointN arg_D9_0 = (PointN)densifiedPoints[densifiedPoints.Length - 1];
}
else
{
PointN arg_E4_0 = (PointN)densifiedPoints[0];
PointN arg_F1_0 = (PointN)densifiedPoints[densifiedPoints.Length - 1];
}
Point3d point3d4 = new Point3d(pointN4.X, pointN4.Y, pointN4.Z);
circArc = new CircularArc3d(point3d, point3d4, point3d3);
}
else
{
Point2d point2d2 = new Point2d(point3d.X, point3d.Y);
Point2d point2d3 = new Point2d(point3d3.X, point3d3.Y);
double num2 = GIS2CAD.CalcThetaFromVectors(point2d2, point2d3, centerPoint, arc.IsCounterClockwise);
double num3 = Math.Tan(num2 / 4.0);
if (!arc.IsCounterClockwise)
{
num3 *= -1.0;
}
CircularArc2d circularArc2d = new CircularArc2d(point2d2, point2d3, num3, false);
Point2d[] samplePoints = circularArc2d.GetSamplePoints(3);
Point3d point3d5 = new Point3d(samplePoints[1].X, samplePoints[1].Y, point3d2.Z);
circArc = new CircularArc3d(point3d, point3d5, point3d3);
}
new Point3d(pointN3.X, pointN3.Y, pointN3.Z);
Arc arc2 = GIS2CAD.CreateFromCircularArc(circArc);
arc2.ColorIndex = (256);
return(arc2);
}
/// <summary>
/// 三点绘制圆
/// </summary>
/// <param name="db"></param>
/// <param name="point1"></param>
/// <param name="point2"></param>
/// <param name="point3"></param>
/// <returns></returns>
public static ObjectId AddCircleModeSpace(this Database db, Point3d point1, Point3d point2, Point3d point3)
{
// 先判断三点是否在同一直线上
if (point1.IsOnOneLine(point2, point3))
{
return(ObjectId.Null);
}
// 声明几何类Circular3d对象
CircularArc3d cArc = new CircularArc3d(point1, point2, point3);
return(db.AddCircleModeSpace(cArc.Center, cArc.Radius));
}
public CircularArc3d GetArcSegmentAt(int index)
{
if (base.isInstanced())
{
CircularArc3d GetArcSegmentAt = BasePolyline.GetArcSegmentAt(index);
tr.Dispose();
return(GetArcSegmentAt);
}
else
{
return(BasePolyline.GetArcSegmentAt(index));
}
}
//根据三点创建圆弧
public static void CreateArc(this Arc arc, Point3d startPoint, Point3d pointOnArc, Point3d endPoint)
{
//创建一个几何类的圆弧对象
CircularArc3d geArc = new CircularArc3d(startPoint, pointOnArc, endPoint);
//将几何类圆弧对象的圆心和半径赋值给圆弧
Point3d centerPoint = geArc.Center;
arc.Center = centerPoint;
arc.Radius = geArc.Radius;
//计算起始和终止角度
arc.StartAngle = startPoint.AngleFromXAxis(centerPoint);
arc.EndAngle = endPoint.AngleFromXAxis(centerPoint);
}
/// <summary>
/// 三点绘制圆
/// </summary>
/// <param name="db">图形数据库</param>
/// <param name="point1">第一个点</param>
/// <param name="point2">第二个点</param>
/// <param name="point3">第三个点</param>
/// <returns>对象Id</returns>
public static ObjectId AddCircleToModelSpace(this Database db, Point3d point1, Point3d point2, Point3d point3)
{
//判断三点是否在同一条直线上
if (point1.IsOnOneLine(point2, point3))
{
Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
ed.WriteMessage("3个顶点在一条直线上，无法绘制圆");
return(ObjectId.Null);
}
//创建几何类CircularArc3d对象
CircularArc3d CArc = new CircularArc3d(point1, point2, point3);
return(AddCircleToModelSpace(db, CArc.Center, CArc.Radius));
}
Coordinate[] GetTessellatedCurveCoordinates(CircularArc3d curve)
{
var coordinateList = new CoordinateList();
if (curve.StartPoint != curve.EndPoint)
{
switch (this.CurveTessellationMethod)
{
case CurveTessellation.None:
coordinateList.Add(this.ReadCoordinate(curve.StartPoint));
coordinateList.Add(this.ReadCoordinate(curve.EndPoint));
break;
case CurveTessellation.Linear:
{
var samplePoints = curve.GetSamplePoints((int)Math.Round(this.CurveTessellationValue));
for (int i = 0; i < samplePoints.Length; i++)
{
Point3d point3D = samplePoints[i].Point;
coordinateList.Add(this.ReadCoordinate(point3D));
}
break;
}
case CurveTessellation.Scaled:
{
double num = curve.GetArea(curve.GetParameterOf(curve.StartPoint), curve.GetParameterOf(curve.EndPoint)) * this.CurveTessellationValue;
double num2 = Math.Acos((curve.Radius - 1.0 / (num / 2.0)) / curve.Radius);
int num3 = (int)Math.Round(6.2831853071795862 / num2);
if (num3 < 8)
{
num3 = 8;
}
if (num3 > 128)
{
num3 = 128;
}
var samplePoints2 = curve.GetSamplePoints(num3);
for (int j = 0; j < samplePoints2.Length; j++)
{
var point3d2 = samplePoints2[j].Point;
coordinateList.Add(this.ReadCoordinate(point3d2));
}
break;
}
}
}
return(coordinateList.ToCoordinateArray());
}
public static Arc CreateArcFromRadius(this Editor acCurEd, Point3d startPoint, Point3d endPoint, double radius)
{
Arc arc = null;
var ucsMat = acCurEd.CurrentUserCoordinateSystem;
var vNormal = ucsMat.CoordinateSystem3d.Zaxis;
var pStart = startPoint.TransformBy(ucsMat); // Start point in WCS
var pEnd = endPoint.TransformBy(ucsMat); // End point in WCS
// Finding center point of arc.
var circ1 = new CircularArc3d(pStart, vNormal, radius);
var circ2 = new CircularArc3d(pEnd, vNormal, radius);
var pts = circ1.IntersectWith(circ2);
circ1.Dispose();
circ2.Dispose();
try
{
if (pts.Length < 1)
{
return(null);
}
}
catch (Exception)
{
return(null);
}
var pCenter = pts[0];
Vector3d v1 = pStart - pCenter, v2 = pEnd - pCenter;
if (v1.CrossProduct(v2).DotProduct(vNormal) < 0)
{
pCenter = pts[1];
}
var cCirc = new CircularArc3d(pCenter, vNormal, radius);
var parStart = cCirc.GetParameterOf(pStart);
var parEnd = cCirc.GetParameterOf(pEnd);
var parMid = (parStart + parEnd) * 0.5;
var pMid = cCirc.EvaluatePoint(parMid);
cCirc.Dispose();
var cArc = new CircularArc3d(pStart, pMid, pEnd);
var angle =
cArc.ReferenceVector.AngleOnPlane(new Plane(cArc.Center, cArc.Normal));
arc = new Arc(cArc.Center, cArc.Normal, cArc.Radius, cArc.StartAngle + angle, cArc.EndAngle + angle);
cArc.Dispose();
return(arc);
}
/// <summary>
/// 由三点(Point3d)创建圆
/// </summary>
/// <param name="pt1">点1</param>
/// <param name="pt2">点2</param>
/// <param name="pt3">点3</param>
/// <returns>过三点的圆</returns>
public static Circle Circle(Point3d pt1, Point3d pt2, Point3d pt3)
{
Vector3d va = pt1.GetVectorTo(pt2);
Vector3d vb = pt1.GetVectorTo(pt3);
if (va.GetAngleTo(vb) == 0 | va.GetAngleTo(vb) == Math.PI)
{
return(new Circle());
}
CircularArc3d geoArc = new CircularArc3d(pt1, pt2, pt3);
Point3d cenPt = new Point3d(geoArc.Center.X, geoArc.Center.Y, 0);
double radius = geoArc.Radius;
return(new Circle(cenPt, Vector3d.ZAxis, radius));
}
public void DimLength()
{
Document doc = Application.DocumentManager.MdiActiveDocument;
Database db = doc.Database;
Editor ed = doc.Editor;
using (Transaction trans = db.TransactionManager.StartTransaction())
{
//1.选择直线或圆弧
PromptEntityOptions curveOpt = new PromptEntityOptions("\n选择直线或圆弧");
curveOpt.SetRejectMessage("请选择直线或圆弧对象！");
curveOpt.AddAllowedClass(typeof(Line), false);
curveOpt.AddAllowedClass(typeof(Arc), false);
PromptEntityResult curveRes = ed.GetEntity(curveOpt);
if (curveRes.Status != PromptStatus.OK)
{
return;
}
Entity ent = curveRes.ObjectId.GetObject(OpenMode.ForRead) as Entity;
//2.设置标注比例
PromptDoubleOptions scaleOpt = new PromptDoubleOptions($"\n设置标注比例<{scale}>");
scaleOpt.AllowNegative = false;
scaleOpt.AllowZero = false;
scaleOpt.AllowNone = true;
PromptDoubleResult scaleRes = ed.GetDouble(scaleOpt);
if (scaleRes.Status == PromptStatus.OK)
{
scale = scaleRes.Value;
}
//3.对直线和圆弧分别进行标注
if (ent is Line)//如果为直线
{
Line line = ent as Line;
LineSegment3d line3d = new LineSegment3d(line.StartPoint, line.EndPoint);
db.LineLengthDim(line3d, scale);
}
else if (ent is Arc)//如果为圆弧
{
Arc arc = ent as Arc;
CircularArc3d arc3d = new CircularArc3d(arc.StartPoint,
arc.Center.PolarPoint((arc.StartAngle + arc.EndAngle) / 2, arc.Radius), arc.EndPoint);
db.ArcLengthDim(arc3d, scale);
}
trans.Commit();
}
}
public static void Create(Grevit.Types.Wall w)
{
Database db = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Database;
Transaction tr = db.TransactionManager.StartTransaction();
Editor ed = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor;
DictionaryWallStyle ws = new DictionaryWallStyle(db);
try
{
Wall wall = new Wall();
LayerTable lt = (LayerTable)tr.GetObject(db.LayerTableId, OpenMode.ForRead);
bool newEnt = false;
if (Command.existing_objects.ContainsKey(w.GID)) wall = (Wall)tr.GetObject(Command.existing_objects[w.GID], OpenMode.ForWrite);
else
{
wall.SetDatabaseDefaults(db);
wall.SetToStandard(db);
newEnt = true;
wall.JustificationType = WallJustificationType.Center;
}
if (w.TypeOrLayer != "") { if (lt.Has(w.TypeOrLayer)) wall.LayerId = lt[w.TypeOrLayer]; }
if (ws.Has(w.FamilyOrStyle, tr)) wall.StyleId = ws.GetAt(w.FamilyOrStyle);
if (w.from != null && w.to != null)
{
wall.Set(GrevitPtoPoint3d(w.from), GrevitPtoPoint3d(w.to), Vector3d.ZAxis);
}
else
{
if (w.curve.GetType() == typeof(Grevit.Types.PLine))
{
Grevit.Types.PLine pline = (Grevit.Types.PLine)w.curve;
for (int i = 0; i < pline.points.Count; i++)
{
if (i == pline.points.Count - 1)
{
if (pline.closed)
{
w.from = pline.points[i];
w.to = pline.points[0];
Create(w);
}
}
else
{
w.from = pline.points[i];
w.to = pline.points[i + 1];
Create(w);
}
}
}
else if (w.curve.GetType() == typeof(Grevit.Types.Line))
{
Grevit.Types.Line baseline = (Grevit.Types.Line)w.curve;
wall.Set(GrevitPtoPoint3d(baseline.from), GrevitPtoPoint3d(baseline.to), Vector3d.ZAxis);
}
else if (w.curve.GetType() == typeof(Grevit.Types.Arc))
{
Grevit.Types.Arc baseline = (Grevit.Types.Arc)w.curve;
CircularArc3d arc = new CircularArc3d(GrevitPtoPoint3d(baseline.center), Vector3d.ZAxis, Vector3d.ZAxis, baseline.radius, baseline.start, baseline.end);
wall.Set(arc, Vector3d.ZAxis);
}
else if (w.curve.GetType() == typeof(Grevit.Types.Curve3Points))
{
Grevit.Types.Curve3Points baseline = (Grevit.Types.Curve3Points)w.curve;
wall.Set(GrevitPtoPoint3d(baseline.a), GrevitPtoPoint3d(baseline.b), GrevitPtoPoint3d(baseline.c), Vector3d.ZAxis);
}
}
wall.BaseHeight = w.height;
if (newEnt)
{
BlockTable bt = (BlockTable)tr.GetObject(db.BlockTableId, OpenMode.ForRead);
BlockTableRecord ms = (BlockTableRecord)tr.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite);
AddXData(w, wall);
ms.AppendEntity(wall);
tr.AddNewlyCreatedDBObject(wall, true);
storeID(w, wall.Id);
}
writeProperties(wall, w.parameters, tr);
tr.Commit();
}
catch (Autodesk.AutoCAD.Runtime.Exception e)
{
ed.WriteMessage(e.Message);
tr.Abort();
}
finally
{
tr.Dispose();
}
}
public static DBObject Create(this Grevit.Types.Wall w, Transaction tr, Grevit.Types.Point from = null, Grevit.Types.Point to = null)
{
DictionaryWallStyle ws = new DictionaryWallStyle(Command.Database);
try
{
if (from == null && to == null && w.curve.GetType() == typeof(Grevit.Types.PLine))
{
Grevit.Types.PLine pline = (Grevit.Types.PLine)w.curve;
for (int i = 0; i < pline.points.Count; i++)
{
if (i == pline.points.Count - 1)
{
if (pline.closed)
{
w.Create(tr, pline.points[i], pline.points[0]);
}
}
else
{
w.Create(tr, pline.points[i], pline.points[i + 1]);
}
}
}
else
{
Wall wall = new Wall();
LayerTable lt = (LayerTable)tr.GetObject(Command.Database.LayerTableId, OpenMode.ForRead);
bool newEnt = false;
if (Command.existing_objects.ContainsKey(w.GID)) wall = (Wall)tr.GetObject(Command.existing_objects[w.GID], OpenMode.ForWrite);
else
{
wall.SetDatabaseDefaults(Command.Database);
wall.SetToStandard(Command.Database);
newEnt = true;
wall.JustificationType = WallJustificationType.Center;
}
if (w.TypeOrLayer != "") { if (lt.Has(w.TypeOrLayer)) wall.LayerId = lt[w.TypeOrLayer]; }
if (ws.Has(w.FamilyOrStyle, tr)) wall.StyleId = ws.GetAt(w.FamilyOrStyle);
if (from != null && to != null)
{
wall.Set(from.ToPoint3d(), to.ToPoint3d(), Vector3d.ZAxis);
}
else
{
if (w.curve.GetType() == typeof(Grevit.Types.Line))
{
Grevit.Types.Line baseline = (Grevit.Types.Line)w.curve;
wall.Set(baseline.from.ToPoint3d(), baseline.to.ToPoint3d(), Vector3d.ZAxis);
}
else if (w.curve.GetType() == typeof(Grevit.Types.Arc))
{
Grevit.Types.Arc baseline = (Grevit.Types.Arc)w.curve;
CircularArc3d arc = new CircularArc3d(baseline.center.ToPoint3d(), Vector3d.ZAxis, Vector3d.ZAxis, baseline.radius, baseline.start, baseline.end);
wall.Set(arc, Vector3d.ZAxis);
}
else if (w.curve.GetType() == typeof(Grevit.Types.Curve3Points))
{
Grevit.Types.Curve3Points baseline = (Grevit.Types.Curve3Points)w.curve;
wall.Set(baseline.a.ToPoint3d(), baseline.b.ToPoint3d(), baseline.c.ToPoint3d(), Vector3d.ZAxis);
}
}
wall.BaseHeight = w.height;
if (newEnt)
{
BlockTable bt = (BlockTable)tr.GetObject(Command.Database.BlockTableId, OpenMode.ForRead);
BlockTableRecord ms = (BlockTableRecord)tr.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite);
ms.AppendEntity(wall);
tr.AddNewlyCreatedDBObject(wall, true);
}
return wall;
}
}
catch (Autodesk.AutoCAD.Runtime.Exception e)
{
}
return null;
}