#### How to transform viewport coordinate to polar coordinate ?

Posted By CHANGMIN KIM 3 Months Ago

## How to transform viewport coordinate to polar coordinate ?

 Author Message CHANGMIN KIM Posted 3 Months Ago Forum Newbie Group: Forum Members Last Active: 3 Months Ago Posts: 10, Visits: 25 Hi Team,I want to convert coordinates from the control perspective to coordinates from the chart perspective.I know how to do this with cartesian chart, but I have no idea on how to do this with polar chart.to be more specific,NCartesianChart chart1 = new NCartesianChart();nChartControl.Charts.Add(chart1);NPolarChart chart2 = new NPolarChart();nChartControl.Charts.Add(chart2);...// I know how to do thisNVector2DD ViewToCartesianScale(in MouseEventArgs e){    NViewToScale2DTransformation view2Scale =        new NViewToScale2DTransformation(chart1,        (int)StandardAxis.PrimaryX, (int)StandardAxis.PrimaryY);    NVector2DD cartesianCoord = new NVector2DD();    view2Scale.Transform(new NPointF(e.X, e.Y), ref cartesianCoord);    return cartesianCoord;}// I want to knowvoid ViewToPolarScale(in MouseEventArgs e, out double angle, out double radius){    ??}Thanks,, Nevron Support Posted 3 Months Ago Supreme Being Group: Forum Members Last Active: Last Week Posts: 2,879, Visits: 3,045 Hi Changmin,The following code shows how to transform from view to polar coordinate:   NPolarChart polarChart = (NPolarChart)nChartControl1.Charts[0];    NPointF modelPoint = polarChart.TransformViewToRadialModel(new Nevron.GraphicsCore.NPointF(e.X, e.Y));    double value = polarChart.Axis(StandardAxis.PolarAngle).Scale.Ruler.ScaleToLogical(modelPoint.X);    double angle = polarChart.Axis(StandardAxis.Polar).Scale.Ruler.ScaleToLogical(modelPoint.Y);We hope this helps - let us know if you have any questions. Best Regards,Nevron Support Team