XZ Grid with Y displacement

[Anaesthesia]

OpenGL3D.png (315.88 KiB) Viewed 21359 times

I'm attempting to emulate the surface chart entitled "XZ Grid with Y displacement" from your gallery. I can't find it in your samples. I can reproduce the charting behaviour by activating Open GL, but then the axis labels are not shown properly (See above).

Can you help?

[Anaesthesia]

This illustrates the absence of labels with openGL. Also,how do I remove the dashed gray lines from the (invisible) left wall?

[Christopher]

Hello,

To make an image similar to this:



you can use the following code:

Code: Select all

    Surface series;
    private void InitializeChart()
    {
      series = new Surface(tChart1.Chart);
      series.FillSampleValues();

      tChart1.Aspect.Orthogonal = false;
      tChart1.Legend.Visible = false;
      tChart1.Aspect.Zoom = 95;
      tChart1.Aspect.Elevation = 295;
      tChart1.Aspect.Perspective = 20;
      tChart1.Aspect.Chart3DPercent = 35;
    }

[Anaesthesia]

EffectOfOpenGL.jpg (185.75 KiB) Viewed 21256 times

I'm afraid I'm still having problems.

In the image above, the same chart (without series data) has been rendered with and without OpenGL active.

I commented in or out the code below to achieve this effect:

Steema.TeeChart.Drawing.GL.TeeOpenGL openGL = new Steema.TeeChart.Drawing.GL.TeeOpenGL(SurfaceChart.Chart);
openGL.Active = true;
openGL.ShadeQuality = true;

Can you please explain:

1. How I can remove the dashed gray lines which are positioned on the left and bottom axes?
2. How I can make the axis labelling visible in the OpenGL rendering?
3. How I can increase the font size of the axis labels (It seems to be stuck on 'Verdana 8') whatever I set in the property editor?

Many thanks,
Andy

[Christopher]

Hello,

Using this code:

Code: Select all

    Surface series;
    Steema.TeeChart.Drawing.GL.TeeOpenGL openGL;
    private void InitializeChart()
    {
      openGL = new Steema.TeeChart.Drawing.GL.TeeOpenGL(tChart1.Chart);
      openGL.ShadeQuality = true;
      series = new Surface(tChart1.Chart);
      //series.FillSampleValues();

      tChart1.Header.Text = "openGL.Active " + openGL.Active;
      tChart1.Aspect.Orthogonal = false;
      tChart1.Legend.Visible = false;
      tChart1.Aspect.Zoom = 95;
      tChart1.Aspect.Elevation = 295;
      tChart1.Aspect.Perspective = 20;
      tChart1.Aspect.Chart3DPercent = 35;
    }


    private void button4_Click(object sender, EventArgs e)
    {
      tChart1.Draw();
      openGL.Active = !openGL.Active;
      tChart1.Header.Text = "openGL.Active " + openGL.Active;

      tChart1.Aspect.Zoom = openGL.Active ? 60 : 95;
    }

I obtain the following images:

export635774703354528973.png (24.71 KiB) Viewed 21254 times

export635774703395922503.png (9.95 KiB) Viewed 21252 times

Can you please modify the above code so I can reproduce your issue here?

[Anaesthesia]

Dear Christopher,

I've solved questions 1 and 2:

1. The gray lines are the Grid lines of the Depth Axis and are removed by setting Axes.Depth.Grid.Visible to false.
2. In my version of Teechart (Steema TeeChart for .NET Source Code 2015 4.1.2015.08060) changing the font in properties (eg Axes.Bottom.Labels.Font) does not work. By default, it is set to Verdana, 8pt and it reverts to this font whatever one chooses. However, changing it by code (eg Axes.Bottom.Labels.Font.Size = 14) works quite happily.

I still not able to work out how to position axis labels correctly when open GL is active. I suspect that the labels are being printed, but in a different orientation.
I note that in your own example, when OpenGL is active, the left and bottom axis zeroes are not shown either.

Andy

[Christopher]

Hello Andy,

I still not able to work out how to position axis labels correctly when open GL is active. I suspect that the labels are being printed, but in a different orientation.
I note that in your own example, when OpenGL is active, the left and bottom axis zeroes are not shown either.

Unfortunately this is a defect which I have added to our tracking system with id=1302. Every effort will be made to find a fix to this defect before the next maintenance release. Apologies for any inconvenience in the meantime.

[Anaesthesia]

Thank you. - I'm still extremely pleased with the graphs I generate!

Andy

[Christopher]

Thank you. - I'm still extremely pleased with the graphs I generate!

That's excellent, I'm very pleased to hear it.

I've now fixed the issue with the axis labels in OpenGL. It is a very simple fix, and if you have the source code version you may be interested in me passing it to you.

[Anaesthesia]

Dear Christopher,

I have the source code version. Could you let me know what to do?

Andy

[Christopher]

Andy,

I have the source code version. Could you let me know what to do?

Of course. There are two changes, both of them to the unit CanvasGL.cs under:

%Program Files%\Steema Software\Steema TeeChart for .NET Source Code 2015 4.1.2015.08060\Sources\TeeChart.OpenGL

and they are shown in the following two images:

diff1.PNG (58.13 KiB) Viewed 21169 times

diff2.PNG (58.75 KiB) Viewed 21159 times

[Anaesthesia]

When I replace the method (as shown below) and attempt to re-compile, I get:

Error 1 'Steema.TeeChart.Drawing.GL.GraphicsGL.TextOut(int, int, string, bool)': no suitable method found to override

Code Snippet:
//public override void TextOut(int x, int y, string text)
//{
// TextOut(x,y,0,text);
//}

public override void TextOut(int x, int y, string text, bool allowHtml)
{
TextOut(x, y, 0, text, false);
}

[Christopher]

When I replace the method (as shown below) and attempt to re-compile, I get:

Error 1 'Steema.TeeChart.Drawing.GL.GraphicsGL.TextOut(int, int, string, bool)': no suitable method found to override

In the second image I think one can see that the signature to override is slightly different, i.e.

Steema.TeeChart.Drawing.GL.GraphicsGL.TextOut(int, int, int, string, bool)

not

Steema.TeeChart.Drawing.GL.GraphicsGL.TextOut(int, int, string, bool)