Data Point Selection

Our example works, so look at the differences between your code and our example. What do you notice?

Something I think you might want to check. The order of modifiers.

When a modifier consumes a mouse event, modifiers further down the list don’t get the mouse event. Try moving the VertexSelectionModifier3D first before FreeLookModifier3D?

Thank Andrew,

I tried to place VertexSelectionModifier3D on the top of modifier group, but it didn’t help.
After testing several cases, I noticed that if you add data to series before application showup (like in the constructor of viewmodel, right-after instaintiate DataSeries) , I can select a point on the surface.
But after application showup, if I add data to series, I can’t do that.
In this example (https://www.scichart.com/example/wpf-chart/wpf-3d-chart-example-simple-select-scatter-point-3d-chart/), the behaviour looks same. Could you do the test like this:

In source code behind, don’t add data to DataSeries in constructor

public SelectScatterPoint3DChart()
{
    InitializeComponent();

    XAx.VisibleRange = new DoubleRange(0, 10);
    YAx.VisibleRange = new DoubleRange(-10, 10);
    ZAx.VisibleRange = new DoubleRange(1000, 10000);

    _xyzDataSeries3D = new XyzDataSeries3D();
    _xyzDataSeries3D.DataSeriesChanged += OnScatterDataChanged;

    renderableSeries3D.DataSeries = _xyzDataSeries3D;
    sciChartSurface.ZoomExtents();
}

In click-event handler, add data

private void ButtonBase_OnClick(object sender, RoutedEventArgs e)
{
    for (int i = 0; i < 300; i++)
    {
        double x = DataManager.Instance.GetGaussianRandomNumber(5, 1.5);
        double y = DataManager.Instance.GetGaussianRandomNumber(0.0, 5.0);
        double z = DataManager.Instance.GetGaussianRandomNumber(5500, 1500);

       PointMetadata3D vertex = new PointMetadata3D(Colors.Coral, 10);

       _xyzDataSeries3D.Append(x, y, z, vertex);
    }
}

After data is rendered, user can’t select a point on the surface.
Please kindly help to check this circumstance! Many thanks.

Thank Andrew,
I tried to place VertexSelectionModifier3D on the top of modifier group, but it didn’t help.
After testing several cases, I noticed that if you add data to series before application showup (like in the constructor of viewmodel, right-after instaintiate DataSeries) , I can select a point on the surface.
But after application showup, if I add data to series, I can’t do that.
In this example (https://www.scichart.com/example/wpf-chart/wpf-3d-chart-example-simple-select-scatter-point-3d-chart/), the behaviour looks same. Could you do the test like:
Replace Toolbar icon by a button

<!—->

In source code behind,
Not add data to DataSeries in constructor

public SelectScatterPoint3DChart()
{
InitializeComponent();

XAx.VisibleRange = new DoubleRange(0, 10);
YAx.VisibleRange = new DoubleRange(-10, 10);
ZAx.VisibleRange = new DoubleRange(1000, 10000);

_xyzDataSeries3D = new XyzDataSeries3D();
_xyzDataSeries3D.DataSeriesChanged += OnScatterDataChanged;

renderableSeries3D.DataSeries = _xyzDataSeries3D;
sciChartSurface.ZoomExtents();
}
In click-event handler, add data

private void ButtonBase_OnClick(object sender, RoutedEventArgs e)
{
for (int i = 0; i < 300; i++)
{
double x = DataManager.Instance.GetGaussianRandomNumber(5, 1.5);
double y = DataManager.Instance.GetGaussianRandomNumber(0.0, 5.0);
double z = DataManager.Instance.GetGaussianRandomNumber(5500, 1500);

PointMetadata3D vertex = new PointMetadata3D(Colors.Coral, 10);

_xyzDataSeries3D.Append(x, y, z, vertex);
}
}

After data is rendered, user can’t select a point on the surface.
Please kindly help to check this circumstance! Many thanks.

Hi Nguyen Bao Trung,

Thanks for your inquiry.
We have logged this in our tracking system for further investigation and will get back to you as soon as we have an update.

With best regards,
Lex,
SciChart Technical Support Engineer

Hi Lex,
Any updates here?

Please notice me when you have information.