PolyPolylineGraphObject::AddPolyline

Description

Add one polyline object.

Syntax

int AddPolyline( vector & vX, vector & vY )

Parameters

vX

[input] X coordinates in world units (axis units)

vY

[input] Y coordinates

Return

Number of points or -1 for error

Examples

EX1

static void make_circle(vector& vx, vector& vy, int nSize, double x0, double y0, double rr)
{
    vx.SetSize(nSize);
    vy.SetSize(nSize);

    double inc = 2.* pi/nSize;
    double ang=0;
    for(int ii = 0; ii <nSize; ii++, ang+= inc)
    {
        vx[ii] = x0 + rr* sin(ang);
        vy[ii] = y0 + rr* cos(ang);
    }
}

void AddPolyline_ex1(int nRegNum = 10)
{    
    GraphPage gp;
    gp.Create("origin");
    GraphLayer gl = gp.Layers(0);
    
    double x1, x2, y1, y2, x0, y0, rr;
    x1 = gl.X.From, x2 = gl.X.To;
    y1 = gl.Y.From, y2 = gl.Y.To;

    PolyPolylineGraphObject go;
    go = gl.CreateGraphObject(GROT_POLYPOLYGON, "PP");
    go.Attach = ATTACH_TO_SCALE;
    // Set Label for polypolygon
    go.SetDrawOption(POLYPOLYLINE_DRAW_OPTION_NEED_TEXT);

    vector<double> vx, vy; 
    for(int ii = 0; ii < nRegNum ; ii ++)
    {
        x0 = x1 + (x2-x1) * rnd();
        y0 = y1 + (y2-y1) *rnd();
        rr = (x2-x1)/50 + rnd() * (x2-x1)/100;
        make_circle(vx, vy, 40, x0, y0, rr);
        int nn = go.AddPolyline(vx, vy);
    }
    
    Tree tr;
    tr.Root.Fill.Color.nVal = INDEX_COLOR_TRANSPARENT;
    tr.Root.Border.Color.nVal = SYSCOLOR_BLUE;
    tr.Root.Border.Width.dVal = 0.2;    
    
    if(go.UpdateThemeIDs(tr.Root) == 0)
        go.ApplyFormat(tr, true, true);
}

Remark

See Also

PolyPolylineGraphObject::RemovePolyline

header to Included

origin.h