private void CreateNURBSShells()
{
#region Knots
Vector singleKnotValuesKsi = KnotValueVectorKsi.RemoveDuplicatesFindMultiplicity()[0];
Vector singleKnotValuesHeta = KnotValueVectorHeta.RemoveDuplicatesFindMultiplicity()[0];
var knots = CreateShellKnots(singleKnotValuesKsi, singleKnotValuesHeta);
#endregion Knots
#region Elements
CreateShellElements(singleKnotValuesKsi, singleKnotValuesHeta, knots);
#endregion Elements
}
private void CreateElements3D(List <Knot> knots)
{
Vector singlesKnotValuesKsi = KnotValueVectorKsi.RemoveDuplicatesFindMultiplicity()[0];
Vector multiplicityKsi = KnotValueVectorKsi.RemoveDuplicatesFindMultiplicity()[1];
Vector singlesKnotValuesHeta = KnotValueVectorHeta.RemoveDuplicatesFindMultiplicity()[0];
Vector multiplicityHeta = KnotValueVectorHeta.RemoveDuplicatesFindMultiplicity()[1];
Vector singlesKnotValuesZeta = KnotValueVectorZeta.RemoveDuplicatesFindMultiplicity()[0];
Vector multiplicityZeta = KnotValueVectorZeta.RemoveDuplicatesFindMultiplicity()[1];
int numberOfElementsKsi = singlesKnotValuesKsi.Length - 1;
int numberOfElementsHeta = singlesKnotValuesHeta.Length - 1;
int numberOfElementsZeta = singlesKnotValuesZeta.Length - 1;
if (numberOfElementsKsi * numberOfElementsHeta * numberOfElementsZeta == 0)
{
throw new ArgumentException("Number of Elements should be defined before Element Connectivity");
}
for (int i = 0; i < numberOfElementsKsi; i++)
{
for (int j = 0; j < numberOfElementsHeta; j++)
{
for (int k = 0; k < numberOfElementsZeta; k++)
{
IList <Knot> knotsOfElement = new List <Knot>
{
knots[
i * singlesKnotValuesZeta.Length * singlesKnotValuesHeta.Length + j * singlesKnotValuesZeta.Length +
k],
knots[
i * singlesKnotValuesZeta.Length * singlesKnotValuesHeta.Length + j * singlesKnotValuesZeta.Length +
k + 1],
knots[
i * singlesKnotValuesZeta.Length * singlesKnotValuesHeta.Length +
(j + 1) * singlesKnotValuesZeta.Length + k],
knots[
i * singlesKnotValuesZeta.Length * singlesKnotValuesHeta.Length +
(j + 1) * singlesKnotValuesZeta.Length + k + 1],
knots[
(i + 1) * singlesKnotValuesZeta.Length * singlesKnotValuesHeta.Length +
j * singlesKnotValuesZeta.Length + k],
knots[
(i + 1) * singlesKnotValuesZeta.Length * singlesKnotValuesHeta.Length +
j * singlesKnotValuesZeta.Length + k + 1],
knots[
(i + 1) * singlesKnotValuesZeta.Length * singlesKnotValuesHeta.Length +
(j + 1) * singlesKnotValuesZeta.Length + k],
knots[
(i + 1) * singlesKnotValuesZeta.Length * singlesKnotValuesHeta.Length +
(j + 1) * singlesKnotValuesZeta.Length + k + 1]
};
int multiplicityElementKsi = 0;
if (multiplicityKsi[i + 1] - this.DegreeKsi > 0)
{
multiplicityElementKsi = (int)multiplicityKsi[i + 1] - DegreeKsi;
}
int multiplicityElementHeta = 0;
if (multiplicityHeta[j + 1] - this.DegreeHeta > 0)
{
multiplicityElementHeta = (int)multiplicityHeta[j + 1] - this.DegreeHeta;
}
int multiplicityElementZeta = 0;
if (multiplicityZeta[k + 1] - this.DegreeZeta > 0)
{
multiplicityElementZeta = (int)multiplicityZeta[k + 1] - this.DegreeZeta;
}
int nurbsSupportKsi = this.DegreeKsi + 1;
int nurbsSupportHeta = this.DegreeHeta + 1;
int nurbsSupportZeta = this.DegreeZeta + 1;
IList <ControlPoint> elementControlPoints = new List <ControlPoint>();
for (int l = 0; l < nurbsSupportKsi; l++)
{
for (int m = 0; m < nurbsSupportHeta; m++)
{
for (int n = 0; n < nurbsSupportZeta; n++)
{
int controlPointID = (i + multiplicityElementKsi) * NumberOfControlPointsHeta *
NumberOfControlPointsZeta +
(j + multiplicityElementHeta) * NumberOfControlPointsZeta +
(k + multiplicityElementZeta) +
l * NumberOfControlPointsHeta * NumberOfControlPointsZeta +
m * NumberOfControlPointsZeta + n;
elementControlPoints.Add(ControlPoints[controlPointID]);
}
}
}
int elementID = i * numberOfElementsHeta * numberOfElementsZeta + j * numberOfElementsZeta + k;
Element element = new NurbsElement3D()
{
ID = elementID,
Patch = this,
ElementType = new NurbsElement3D()
};
element.AddKnots(knotsOfElement);
element.AddControlPoints(elementControlPoints.ToList());
Elements.Add(element);
}
}
}
}
private void CreateShellElements(Vector singleKnotValuesKsi, Vector singleKnotValuesHeta, List <Knot> knots)
{
Vector multiplicityKsi = KnotValueVectorKsi.RemoveDuplicatesFindMultiplicity()[1];
Vector multiplicityHeta = KnotValueVectorHeta.RemoveDuplicatesFindMultiplicity()[1];
int numberOfElementsKsi = singleKnotValuesKsi.Length - 1;
int numberOfElementsHeta = singleKnotValuesHeta.Length - 1;
if (numberOfElementsKsi * numberOfElementsHeta == 0)
{
throw new ArgumentException("Number of Elements should be defined before Element Connectivity");
}
for (int i = 0; i < numberOfElementsKsi; i++)
{
for (int j = 0; j < numberOfElementsHeta; j++)
{
IList <Knot> knotsOfElement = new List <Knot>
{
knots[i * singleKnotValuesHeta.Length + j],
knots[i * singleKnotValuesHeta.Length + j + 1],
knots[(i + 1) * singleKnotValuesHeta.Length + j],
knots[(i + 1) * singleKnotValuesHeta.Length + j + 1]
};
int multiplicityElementKsi = 0;
if (multiplicityKsi[i + 1] - this.DegreeKsi > 0)
{
multiplicityElementKsi = (int)multiplicityKsi[i + 1] - this.DegreeKsi;
}
int multiplicityElementHeta = 0;
if (multiplicityHeta[j + 1] - this.DegreeHeta > 0)
{
multiplicityElementHeta = (int)multiplicityHeta[j + 1] - this.DegreeHeta;
}
int nurbsSupportKsi = this.DegreeKsi + 1;
int nurbsSupportHeta = this.DegreeHeta + 1;
IList <ControlPoint> elementControlPoints = new List <ControlPoint>();
for (int k = 0; k < nurbsSupportKsi; k++)
{
for (int l = 0; l < nurbsSupportHeta; l++)
{
int controlPointID = (i + multiplicityElementKsi) * this.NumberOfControlPointsHeta +
(j + multiplicityElementHeta) + k * this.NumberOfControlPointsHeta + l;
elementControlPoints.Add(ControlPoints[controlPointID]);
}
}
int elementID = i * numberOfElementsHeta + j;
Element element = new NurbsKirchhoffLoveShellElement()
{
ID = elementID,
Patch = this,
ElementType = new NurbsKirchhoffLoveShellElement()
};
element.AddKnots(knotsOfElement);
element.AddControlPoints(elementControlPoints.ToList <ControlPoint>());
Elements.Add(element);
}
}
}