Direct3dX例外和延迟与网格使用Directx

我的directX网格有问题。当我绘制超过4-5个网格(我使用球体)时，Direct3dX异常出现在我初始化网格的地方。在这种情况下，我也有疯狂的滞后。我用c#。

这是我绘制球体的函数:

    public void draw(Device device)
    {
        device.Transform.World =Matrix.Translation(v3CurMeshPos);            
        device.Material = m;
        device.RenderState.Ambient = color;
        mesh = Mesh.Sphere(device, radius, 100, 100); // problem line
        mesh.DrawSubset(0);
    }

这是我的初始化和绘图用directX:

    private void devicePanel1_OnCreateDevice(object sender, DirectxGraph.DeviceEventArgs e)
    {
        device = e.Device;
        device.Transform.Projection = Matrix.PerspectiveFovLH((float)Math.PI / 4, devicePanel1.Width / devicePanel1.Height, 1f, 1000f);
        device.RenderState.Lighting = true;
        device.RenderState.CullMode = Cull.None;
        device.Lights[0].Type = LightType.Directional;
        device.Lights[0].Position = new Vector3(10, 10, 0);
        device.Lights[0].Direction = new Vector3(1, -3, -1);
        device.Lights[0].Enabled = true;
    }
    private void updateCamera()
    {
        v3CamPos = new Vector3(0, 0, Util.distance);
        v3CamLookAt = new Vector3(0, 0, 0);
        device.Transform.View = Matrix.RotationYawPitchRoll(Util.rotX, Util.rotY, Util.rotZ) * Matrix.LookAtLH(v3CamPos, v3CamLookAt, new Vector3(0, 1, 0));
    }
    private void devicePanel1_OnRender(object sender, DirectxGraph.DeviceEventArgs e)
    {
        Draw(device);
    }
    private void Draw(Device device)
    {
        if (rotate_forward)
        {
            if (radioButton1.Checked)
            {
                Util.rotX += 0.005f;
            }
            else if (radioButton2.Checked)
            {
                Util.rotY += 0.005f;
            }
            else if (radioButton3.Checked)
            {
                Util.rotZ += 0.005f;
            }
        }
        else if (rotate_backward)
        {
            if (radioButton1.Checked)
            {
                Util.rotX -= 0.005f;
            }
            else if (radioButton2.Checked)
            {
                Util.rotY -= 0.005f;
            }
            else if (radioButton3.Checked)
            {
                Util.rotZ -= 0.005f;
            }
        }
        updateCamera();
        if (!graph.isEmpty())
        {
            foreach (Node node in graph.nodes)
            {
                node.shape.draw(device);
            }
        }
    }

mesh = Mesh.Sphere(device, radius, 100, 100); // problem line