private Inventor.Point GetEdgePointAtParam(Inventor.EdgeUse EdgeUse, double Pt)
{
Inventor.TransientGeometry TransientGeometry = mInvApplication.TransientGeometry;
Inventor.CurveEvaluator CurveEvaluator;
double[] Param = new double[0];
double[] Pnt = new double[3];
Param[0] = Pt;
CurveEvaluator = EdgeUse.Edge.Evaluator;
CurveEvaluator.GetPointAtParam(ref Param, ref Pnt);
return(TransientGeometry.CreatePoint(Pnt[0], Pnt[1], Pnt[2]));
}
private Inventor.UnitVector GetTangentAtParam(Inventor.EdgeUse EdgeUse, double Pt)
{
Inventor.TransientGeometry TransientGeometry = mInvApplication.TransientGeometry;
Inventor.CurveEvaluator CurveEvaluator;
double[] Param = new double[0];
double[] v = new double[3];
Param[0] = Pt;
CurveEvaluator = EdgeUse.Edge.Evaluator;
CurveEvaluator.GetPointAtParam(ref Param, ref v);
if (EdgeUse.IsOpposedToEdge)
{
return(TransientGeometry.CreateUnitVector(-v[0], -v[1], -v[2]));
}
else
{
return(TransientGeometry.CreateUnitVector(v[0], v[1], v[2]));
}
}
/// <summary>
/// select an edge a dump its first deriv and tangent
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Button3_Click(object sender, EventArgs e)
{
if (((mApp.ActiveDocument != null)))
{
if ((mApp.ActiveDocument.DocumentType == DocumentTypeEnum.kPartDocumentObject))
{
PartDocument oDoc = mApp.ActiveDocument as PartDocument;
if ((oDoc.SelectSet.Count == 1))
{
if (((oDoc.SelectSet[1]) is Edge))
{
Edge oEdge = oDoc.SelectSet[1] as Edge;
CurveEvaluator oCurveEval = oEdge.Evaluator;
double MinParam = 0;
double MaxParam = 0;
oCurveEval.GetParamExtents(out MinParam, out MaxParam);
double length = 0;
oCurveEval.GetLengthAtParam(MinParam, MaxParam, out length);
double MidParam = 0;
oCurveEval.GetParamAtLength(MinParam, length * 0.5, out MidParam);
double[] Params = { MidParam };
double[] Points = new double[3 * Params.Length];
oCurveEval.GetPointAtParam(ref Params, ref Points);
double[] Directions = new double[3 * Params.Length];
double[] Curvatures = new double[Params.Length];
oCurveEval.GetCurvature(ref Params, ref Directions, ref Curvatures);
double[] Tangents = new double[3 * Params.Length];
oCurveEval.GetTangent(ref Params, ref Tangents);
double[] FirstDeriv = new double[3 * Params.Length];
oCurveEval.GetFirstDerivatives(ref Params, ref FirstDeriv);
string strResult = "Curve Properties: \n\n";
strResult += " - Length: " + length.ToString("F2") + "\n\n";
strResult += " - Middle point: [" + Points[0].ToString("F2") + ", " + Points[1].ToString("F2") + ", " + Points[2].ToString("F2") + "]" + "\n\n";
strResult += " - Curvature: " + Curvatures[0].ToString("F2") + "\n\n";
strResult += " - Tangent: [" + Tangents[0].ToString("F2") + ", " + Tangents[1].ToString("F2") + ", " + Tangents[2].ToString("F2") + "]" + "\n\n";
strResult += " - First derivative: [" + FirstDeriv[0].ToString("F2") + ", " + FirstDeriv[1].ToString("F2") + ", " + FirstDeriv[2].ToString("F2") + "]" + "\n\n";
System.Windows.Forms.MessageBox.Show(strResult, "Curve Evaluator");
return;
}
else
{
System.Windows.Forms.MessageBox.Show("Selected entity must be an Edge", "Curve Evaluator");
return;
}
}
else
{
System.Windows.Forms.MessageBox.Show("A single Edge must be selected first", "Curve Evaluator");
return;
}
}
}
}
