public static Plane GetPlaneFromCurve(Curve c, bool planarOnly)
{
//find the plane of the curve and generate a sketch plane
double period = c.IsBound ? 0.0 : (c.IsCyclic ? c.Period : 1.0);
var p0 = c.IsBound ? c.Evaluate(0.0, true) : c.Evaluate(0.0, false);
var p1 = c.IsBound ? c.Evaluate(0.5, true) : c.Evaluate(0.25 * period, false);
var p2 = c.IsBound ? c.Evaluate(1.0, true) : c.Evaluate(0.5 * period, false);
if (IsLineLike(c))
{
XYZ norm = null;
//keep old plane computations
if (Math.Abs(p0.Z - p2.Z) < Tolerance)
{
norm = XYZ.BasisZ;
}
else
{
var v1 = p1 - p0;
var v2 = p2 - p0;
var p3 = new XYZ(p2.X, p2.Y, p0.Z);
var v3 = p3 - p0;
norm = v1.CrossProduct(v3);
if (norm.IsZeroLength())
{
norm = v2.CrossProduct(XYZ.BasisY);
}
norm = norm.Normalize();
}
return(Plane.CreateByNormalAndOrigin(norm, p0));
}
var cLoop = new CurveLoop();
cLoop.Append(c.Clone());
if (cLoop.HasPlane())
{
return(cLoop.GetPlane());
}
if (planarOnly)
{
return(null);
}
// Get best fit plane using tesselation
var points = c.Tessellate().Select(x => x.ToPoint(false));
var bestFitPlane =
Autodesk.DesignScript.Geometry.Plane.ByBestFitThroughPoints(points);
return(bestFitPlane.ToPlane(false));
}
public static Plane GetPlaneFromCurve(Curve c, bool planarOnly)
{
//find the plane of the curve and generate a sketch plane
double period = c.IsBound ? 0.0 : (c.IsCyclic ? c.Period : 1.0);
var p0 = c.IsBound ? c.Evaluate(0.0, true) : c.Evaluate(0.0, false);
var p1 = c.IsBound ? c.Evaluate(0.5, true) : c.Evaluate(0.25 * period, false);
var p2 = c.IsBound ? c.Evaluate(1.0, true) : c.Evaluate(0.5 * period, false);
if (IsLineLike(c))
{
XYZ norm = null;
//keep old plane computations
if (System.Math.Abs(p0.Z - p2.Z) < Tolerance)
{
norm = XYZ.BasisZ;
}
else
{
var v1 = p1 - p0;
var v2 = p2 - p0;
var p3 = new XYZ(p2.X, p2.Y, p0.Z);
var v3 = p3 - p0;
norm = v1.CrossProduct(v3);
if (norm.IsZeroLength())
{
norm = v2.CrossProduct(XYZ.BasisY);
}
norm = norm.Normalize();
}
return new Plane(norm, p0);
}
var cLoop = new CurveLoop();
cLoop.Append(c.Clone());
if (cLoop.HasPlane())
{
return cLoop.GetPlane();
}
if (planarOnly)
return null;
// Get best fit plane using tesselation
var points = c.Tessellate().Select(x => x.ToPoint(false));
var bestFitPlane =
Autodesk.DesignScript.Geometry.Plane.ByBestFitThroughPoints(points);
return bestFitPlane.ToPlane(false);
}
/***************************************************/
/**** Public methods ****/
/***************************************************/
public static bool IsVerticalNonLinearCurve(this Curve revitCurve, RevitSettings settings)
{
if (!(revitCurve is Line))
{
CurveLoop curveLoop = CurveLoop.Create(new Curve[] { revitCurve });
if (curveLoop.HasPlane())
{
Plane curvePlane = curveLoop.GetPlane();
//Orientation angles are handled slightly differently for framing elements that have a curve fits in a plane that contains the z-vector
if (Math.Abs(curvePlane.Normal.DotProduct(XYZ.BasisZ)) < settings.AngleTolerance)
{
return(true);
}
}
}
return(false);
}
/// <summary>
/// 获取一组连续封闭的模型线
/// </summary>
/// <returns></returns>
/// <remarks></remarks>
private CurveLoop GetLoopedCurve(out List <ModelCurve> modelCurves)
{
Document Doc = this._uiDoc.Document;
//
IList <Reference> boundaries = Selector.SelectGeneralElements <ModelCurve>(_uiDoc, out modelCurves, "选择一组模型线");
//
if (boundaries == null || !boundaries.Any())
{
return(null);
}
CurveLoop cvLoop = new CurveLoop();
try
{
if (boundaries.Count == 1) // 要么是封闭的圆或圆弧，要么就不封闭
{
Curve c = ((ModelCurve)Doc.GetElement(boundaries[0])).GeometryCurve;
if ((c is Arc || c is Ellipse) && !c.IsBound)
{
cvLoop.Append(c);
}
else
{
throw new InvalidOperationException("选择的一条圆弧线或者椭圆线并不封闭。");
}
}
else
{
// 对于选择了多条曲线的情况
IList <Curve> cs = CurvesFormator.GetContiguousCurvesFromCurves(Doc, boundaries);
if (cs != null)
{
foreach (Curve c in cs)
{
cvLoop.Append(c);
}
}
else
{
throw new InvalidOperationException("所选择的曲线不连续。");
}
if (cvLoop.IsOpen())
{
throw new InvalidOperationException("所选择的曲线不能形成封闭的曲线。");
}
else if (!cvLoop.HasPlane())
{
throw new InvalidOperationException("所选择的曲线不在同一个平面上。");
}
else
{
return(cvLoop);
}
}
}
catch (Exception ex)
{
DialogResult res =
MessageBox.Show(
ex.Message + " 点击是以重新选择，点击否以退出绘制。" + "\r\n" + "当前选择的曲线条数为：" + Convert.ToString(boundaries.Count) +
"条。" +
"\r\n" + ex.StackTrace, "Warnning", MessageBoxButtons.YesNo);
if (res == DialogResult.Yes)
{
cvLoop = GetLoopedCurve(out modelCurves);
}
else
{
cvLoop = new CurveLoop();
return(cvLoop);
}
}
return(cvLoop);
}