public void OnRender(OpenTkControlBase.GlRenderEventArgs e)
{
if (Errored)
{
return;
}
try
{
if (!loaded)
{
InitProgram();
loaded = true;
}
if (e.Resized)
{
w = e.Width;
h = e.Height;
}
UpdateFrame();
GL.Viewport(0, 0, w, h);
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
GL.Enable(EnableCap.DepthTest);
foreach (var shader in shaders)
{
RenderShader(shader.Key, shader.Value);
}
GL.Flush();
}
catch (Exception exc)
{
Console.WriteLine(exc);
}
}
private void RenderCallback(object?sender, OpenTkControlBase.GlRenderEventArgs e)
{
if (!initialized)
{
Initialize();
}
if (e.Resized)
{
GL.Viewport(0, 0, (int)control.ActualWidth, (int)control.ActualHeight);
}
deltaTimeStopwatch.Stop();
float deltaTime = deltaTimeStopwatch.ElapsedMilliseconds / 1000f;
deltaTimeStopwatch.Reset();
deltaTimeStopwatch.Start();
Render(deltaTime);
}
private void OpenTkControl_OnGlRender(object sender, OpenTkControlBase.GlRenderEventArgs e)
{
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
GL.MatrixMode(MatrixMode.Projection);
GL.LoadIdentity();
float halfWidth = e.Width / 2f;
float halfHeight = e.Height / 2f;
GL.Ortho(-halfWidth, halfWidth, -halfHeight, halfHeight, 1000, -1000);
GL.Viewport(0, 0, e.Width, e.Height);
//Using the same example as used by https://github.com/freakinpenguin/OpenTK-WPF
//to make it easier to compare different approaches
if (_displayList <= 0 || e.NewContext)
{
_displayList = GL.GenLists(1);
GL.NewList(_displayList, ListMode.Compile);
GL.Color3(Color.Red);
GL.Begin(PrimitiveType.Points);
Random rnd = new Random();
for (int i = 0; i < 1000000; i++)
{
float factor = 0.2f;
Vector3 position = new Vector3(
rnd.Next(-1000, 1000) * factor,
rnd.Next(-1000, 1000) * factor,
rnd.Next(-1000, 1000) * factor);
GL.Vertex3(position);
position.Normalize();
GL.Normal3(position);
}
GL.End();
GL.EndList();
}
GL.Enable(EnableCap.Lighting);
GL.Enable(EnableCap.Light0);
GL.Enable(EnableCap.Blend);
GL.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
GL.Enable(EnableCap.DepthTest);
GL.ClearColor(Color.FromArgb(200, Color.LightBlue));
GL.Clear(ClearBufferMask.DepthBufferBit | ClearBufferMask.ColorBufferBit);
GL.MatrixMode(MatrixMode.Modelview);
GL.LoadIdentity();
_angle += 1f;
GL.Rotate(_angle, Vector3.UnitZ);
GL.Rotate(_angle, Vector3.UnitY);
GL.Rotate(_angle, Vector3.UnitX);
GL.Translate(0.5f, 0, 0);
GL.CallList(_displayList);
GL.MatrixMode(MatrixMode.Modelview);
GL.LoadIdentity();
GL.Begin(PrimitiveType.Triangles);
GL.Color4(Color.Green);
GL.Vertex3(0, 300, 0);
GL.Vertex3(0, 0, 0);
GL.Vertex3(300, 0, 0);
GL.End();
Interlocked.Increment(ref _fps);
}
