curvebase::GetRectPoints

GetRectPoints

1 Description
2 Syntax
3 Parameters
4 Return
5 Examples
6 Remark
7 See Also
8 Header to Include

Description

Find all the points in a Curve which fall on or within a specified rectangle.

Syntax

int GetRectPoints( fpoint & fptTopLeft, fpoint & fptBottomRight, vector<double> & vX, vector<double> & vY, vector<int> & vIndex )

Parameters

fptTopLeft: [Input] fpoint identifying the top-left corner of the rectangle
fptBottomRight: [Input] fpoint identifying the bottom-right corner of the rectangle
vX: [Output] vector containing the X coordinates of all points in the rectangele, paired with vY and vIndex
vY: [Output] vector containing the Y coordinates of all points in the rectangele, paired with vX and vIndex
vIndex: [Output] vector containing the row index (0 based) into the Curve's X and Y data sets, paired with vX and vY

Return

Returns the number of data points found within the rectangle (0,1,2,3...) on success and returns a negative integer on failure. Also returns the coordinates and index of all points within the rectangle.

Examples

EX1

int curvebase_GetRectPoints_ex1(string wksName = "Book1")
{
        // Assumes Book1_A(X) and Book1_B(Y) exist with the following data:
        // Book1_B={1,2,3,4,5,6,7,8,9,10}
        // Book1_A={1,2,3,4,5,6,7,8,9,10};
    Worksheet wks(wksName);
    Dataset ds1(wksName,0), ds2(wksName,1), ds3;
    
    Curve crv(ds1, ds2);
    int colnum = wks.AddCol("Index");
    ds1.Attach(wksName,colnum);
    colnum = wks.AddCol("Xval");
    ds2.Attach(wksName,colnum);
    colnum = wks.AddCol("Yval");
    ds3.Attach(wksName,colnum);
    
    fpoint fptTL(3,8);
    fpoint fptBR(7,2);
    vector<double> vX, vY;
    vector<int> vIndex; 
    int num = crv.GetRectPoints( fptTL, fptBR, vX, vY, vIndex );
    vIndex+=1;  //adjust because 0 based
    ds1 = vIndex;
    ds2 = vX;
    ds3 = vY;
    return num;
}

Remark

Find all the points in a Curve which fall on or within a specified rectangle. The rectangle is specified by its top-left and bottom-right corners.

void dd(double x1, double x2, double y1, double y2)
{
        fpoint fptTL(x1,y2);
        fpoint fptBR(x2,y1);
        vector vX, vY;
        GraphLayer gl = Project.ActiveLayer();       
        int ii = 1;
        foreach (DataPlot dp in gl.DataPlots)
        {
                int        nn = dp.GetRectPoints(fptTL, fptBR, vX, vY);
                printf("%d: Found %d\n", ii++, nn);
        }
}