CODEWITHSUNDEEP
ilnumerics
christophocles
christophocles

Reputation: 43

opengl renderer not working Intel HD graphics 2500

I have been unsuccessful trying to use the OpenGL driver with ILNumerics visualizations. I am trying to just do a basic visualization following Quick Start guide - every time I launch the application I get the error message "no compatible hardware accelerated driver could be found or activated" with error reported "Attempted to read or write protected memory. This is often an indication that other memory is corrupt". The graphics driver falls back to GDI which is really slow.

I have tried all of the suggested fixes for this problem. I installed the latest Intel HD graphics driver, and I ran OpenGL Extensions viewer which indicates that OpenGL 4.0 is supported. ILNumerics documentation indicates 3.1+ is required, which my system appears to support.

So I am at a loss here. Is there a way to use hardware rendering with this Intel card, or not?

Upvotes: 4

Views: 2073

Answers (2)

Decatf
Decatf

Reputation: 36

I have also been trying to use the ILNumerics OpenGL driver but with an an Intel HD4000. I get the same error and the debug log shows that ILNumerics crashes with at the glDrawElements call.

I found a work around when initializing an ilPlotCube so that the OpenGL driver will not crash. I am using the Window Forms ilPanel control and ilNumerics 3.2.2.0 from NuGet.

  • In the ilPanel_load event create an ilPlotCube and set the x-axis scale to logarithmic. Add the plotcube to the scene.
  • Add an ilPoint element to the plotcube. I fill it with random data.

  • For me this runs and the plot control loads using the OpenGL driver without crashing.

    void ilPanel1_Load(object sender, EventArgs e)
{                     
    var pc = new ILPlotCube(twoDMode: false);
    // Set an axis scale to logarithmic so the GL driver will not crash
    pc.ScaleModes.XAxisScale = AxisScale.Logarithmic;

    // Create a new scene
    var scene = new ILScene();  
    scene.Add(pc);            
    this.ilPanel1.Scene = scene;

    // Add points to the scene so the GL driver will not crash
    this.AddPoints();
}

/// <summary>
/// Add an ILPoints object so GL driver will not crash
/// </summary>
private void AddPoints()
{
    var pc = ilPanel1.Scene.First<ILPlotCube>();

    ILArray<float> A = ILMath.tosingle(ILMath.rand(3, 1000));
    var points = new ILPoints
    {
        Positions = A,
        Colors = A,
        Size = 2,
    };

    pc.Add(points);
    this.points = points;
}

If the control loads successfully with the OpenGL driver then remove the points element from the scene. Set the axis scale as desired. Add another charting element which plots the actual thing you want to plot.

        // Remove the ILPoints shape
        if (this.points != null && ilPanel1.Scene.Contains(points))
        {
            ilPanel1.Scene.Remove(this.points);
            this.points = null;
        }

        // Set the axis scale back to linear
        var pcsm = ilPanel1.Scene.First<ILPlotCube>().ScaleModes;
        pcsm.XAxisScale = AxisScale.Linear;

        // Add actual plots here

Upvotes: 2

Haymo Kutschbach
Haymo Kutschbach

Reputation: 3362

Intel HD graphics often causes problems with OpenGL. You should file a bugreport on the Intel bugtracker and resort to a graphics card which does support OpenGL 3.1 - really.

Upvotes: 1

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