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Group: Forum Members
Last Active: 5 Years Ago
Posts: 10,
Visits: 25
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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 this
NVector2DD 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 know
void ViewToPolarScale(in MouseEventArgs e, out double angle, out double radius)
{
??
}
NCartesianChart chart1 = new NCartesianChart();
nChartControl.Charts.Add(chart1);
NPolarChart chart2 = new NPolarChart();
nChartControl.Charts.Add(chart2);
...
// I know how to do this
NVector2DD 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 know
void ViewToPolarScale(in MouseEventArgs e, out double angle, out double radius)
{
??
}
Thanks,,
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Group: Forum Members
Last Active: Last Month
Posts: 3,055,
Visits: 4,055
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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
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