/// <summary>
/// Calculate interpolation weights for the point (x,y) inside the triangle defined by
/// the nodes in <paramref name="elmtNodes"/>.
///<para>
/// Check
/// <see cref="InterpolationWeights(double,double,double,double,double,double,double,double)"/>
/// for details.
/// </para>
/// </summary>
/// <param name="x">Point X coordinate</param>
/// <param name="y">Point Y coordinate</param>
/// <param name="elmtNodes">Nodes in element</param>
/// <returns>Interpolation weights (w1,w2,w3)</returns>
public static Weights InterpolationWeights(double x, double y, IList <MeshNode> elmtNodes)
{
double x1 = elmtNodes[0].X;
double x2 = elmtNodes[1].X;
double x3 = elmtNodes[2].X;
double y1 = elmtNodes[0].Y;
double y2 = elmtNodes[1].Y;
double y3 = elmtNodes[2].Y;
return(InterpTriangle.InterpolationWeights(x, y, x1, y1, x2, y2, x3, y3));
}
/// <summary>
/// Calculate interpolation weights for the point (x,y) inside the triangle defined by
/// the nodes in <paramref name="elmtNodes"/>.
///<para>
/// Check
/// <see cref="InterpolationWeights(double,double,double,double,double,double,double,double)"/>
/// for details.
/// </para>
/// </summary>
/// <param name="x">Point X coordinate</param>
/// <param name="y">Point Y coordinate</param>
/// <param name="smesh">MeshData object</param>
/// <param name="elmtNodes">Nodes in element</param>
/// <returns>Interpolation weights (w1,w2,w3)</returns>
public static Weights InterpolationWeights(double x, double y, SMeshData smesh, int[] elmtNodes)
{
double x1 = smesh.X[elmtNodes[0]];
double x2 = smesh.X[elmtNodes[1]];
double x3 = smesh.X[elmtNodes[2]];
double y1 = smesh.Y[elmtNodes[0]];
double y2 = smesh.Y[elmtNodes[1]];
double y3 = smesh.Y[elmtNodes[2]];
return(InterpTriangle.InterpolationWeights(x, y, x1, y1, x2, y2, x3, y3));
}
private void Init()
{
_interpQ = new InterpQuadrangle()
{
DelVal = DeleteValue
};
_interpT = new InterpTriangle()
{
DelVal = DeleteValue
};
_interpEN = new InterpElmtNode()
{
DelVal = DeleteValue
};
}
/// <summary>
/// Interpolate node values to the (x,y) coordinate.
/// </summary>
/// <param name="x">X coordinate</param>
/// <param name="y">Y coordinate</param>
/// <param name="nodeValues">Node values</param>
public double InterpolateNodeToXY(double x, double y, double[] nodeValues)
{
// Find element that includes the (x,y) coordinate
int element = _ssearcher.FindElement(x, y);
// Check if element has been found, i.e. includes the (x,y) point
if (element >= 0)
{
int[] nodes = _smesh.ElementTable[element];
if (nodes.Length == 3)
{
var weights = InterpTriangle.InterpolationWeights(x, y, _smesh, nodes);
return(_interpT.GetValue(weights, nodes, _smesh, nodeValues));
}
if (nodes.Length == 4)
{
var weights = InterpQuadrangle.InterpolationWeights(x, y, _smesh, nodes);
return(_interpQ.GetValue(weights, nodes, _smesh, nodeValues));
}
}
return(DeleteValue);
}
/// <summary>
/// Add a target, by specifying its (x,y) coordinate.
/// </summary>
private void AddSTarget(double x, double y)
{
// Find element that includes the (x,y) coordinate
int element = _ssearcher.FindElement(x, y);
// Setup interpolation from node values
if (NodeValueInterpolation)
{
InterpNodeData interp;
if (element >= 0)
{
int[] nodes = _smesh.ElementTable[element];
if (nodes.Length == 3)
{
var weights = InterpTriangle.InterpolationWeights(x, y, _smesh, nodes);
interp = new InterpNodeData(element, weights.w1, weights.w2, weights.w3);
}
else if (nodes.Length == 4)
{
var weights = InterpQuadrangle.InterpolationWeights(x, y, _smesh, nodes);
interp = new InterpNodeData(element, weights.dx, weights.dy);
}
else
{
interp = InterpNodeData.Undefined();
}
}
else
{
interp = InterpNodeData.Undefined();
}
if (_targetsNode == null)
{
_targetsNode = new List <InterpNodeData>();
}
_targetsNode.Add(interp);
}
// Setup interpolation from element+node values
if (ElmtNodeValueInterpolation)
{
InterpElmtNode.Weights weights;
// Check if element has been found, i.e. includes the (x,y) point
if (element >= 0)
{
weights = InterpElmtNode.InterpolationWeights(x, y, element, _smesh);
}
else
{
weights = InterpElmtNode.Undefined();
}
if (_targetsElmtNode == null)
{
_targetsElmtNode = new List <InterpElmtNode.Weights>();
}
_targetsElmtNode.Add(weights);
}
}
/// <summary>
/// Add a target, by specifying its (x,y) coordinate.
/// </summary>
public void AddTarget(double x, double y)
{
if (_mesh == null)
{
AddSTarget(x, y);
return;
}
// Find element that includes the (x,y) coordinate
MeshElement element = _searcher.FindElement(x, y);
// Setup interpolation from node values
if (NodeValueInterpolation)
{
InterpNodeData interp;
// Check if element has been found, i.e. includes the (x,y) point
if (element != null)
{
var nodes = element.Nodes;
if (nodes.Count == 3)
{
var weights = InterpTriangle.InterpolationWeights(x, y, nodes);
interp = new InterpNodeData(element.Index, weights.w1, weights.w2, weights.w3);
}
else if (nodes.Count == 4)
{
var weights = InterpQuadrangle.InterpolationWeights(x, y, nodes);
interp = new InterpNodeData(element.Index, weights.dx, weights.dy);
}
else
{
interp = InterpNodeData.Undefined();
}
}
else
{
interp = InterpNodeData.Undefined();
}
if (_targetsNode == null)
{
_targetsNode = new List <InterpNodeData>();
}
_targetsNode.Add(interp);
}
// Setup interpolation from element+node values
if (ElmtNodeValueInterpolation)
{
InterpElmtNode.Weights weights;
// Check if element has been found, i.e. includes the (x,y) point
if (element != null)
{
weights = InterpElmtNode.InterpolationWeights(x, y, element);
}
else
{
weights = InterpElmtNode.Undefined();
}
if (_targetsElmtNode == null)
{
_targetsElmtNode = new List <InterpElmtNode.Weights>();
}
_targetsElmtNode.Add(weights);
}
}