public ExampleWindow() : base("Hello Triangle (GTK#)")
{
SetDefaultSize(800, 600);
SetPosition(WindowPosition.Center);
GlWidget glWidget = new GlWidget();
Add(glWidget);
glWidget.SetSizeRequest(100, 100);
DeleteEvent += delegate { Application.Quit(); };
ShowAll();
}
public ExampleWindow() : base("Hello Triangle (GTK# 3)")
{
SetDefaultSize(800, 600);
SetPosition(WindowPosition.Center);
GlWidget glWidget = new GlWidget();
Add(glWidget);
glWidget.Hexpand = true;
glWidget.Vexpand = true;
glWidget.SetSizeRequest(100, 100);
glWidget.ContextCreated += GlWidget_ContextCreated;
glWidget.Render += GlWidget_Render;
DeleteEvent += delegate { Application.Quit(); };
ShowAll();
}
private void GlWidget_Render(object sender, GlWidgetEventArgs e)
{
GlWidget senderControl = (GlWidget)sender;
Gl.Viewport(0, 0, senderControl.WidthRequest, senderControl.HeightRequest);
Gl.Clear(ClearBufferMask.ColorBufferBit);
// Animate triangle
Gl.MatrixMode(MatrixMode.Modelview);
Gl.LoadIdentity();
Gl.Rotate(_Angle, 0.0f, 0.0f, 1.0f);
if (Gl.CurrentVersion >= Gl.Version_110)
{
// Old school OpenGL 1.1
// Setup & enable client states to specify vertex arrays, and use Gl.DrawArrays instead of Gl.Begin/End paradigm
using (MemoryLock vertexArrayLock = new MemoryLock(_ArrayPosition))
using (MemoryLock vertexColorLock = new MemoryLock(_ArrayColor))
{
// Note: the use of MemoryLock objects is necessary to pin vertex arrays since they can be reallocated by GC
// at any time between the Gl.VertexPointer execution and the Gl.DrawArrays execution
Gl.VertexPointer(2, VertexPointerType.Float, 0, vertexArrayLock.Address);
Gl.EnableClientState(EnableCap.VertexArray);
Gl.ColorPointer(3, ColorPointerType.Float, 0, vertexColorLock.Address);
Gl.EnableClientState(EnableCap.ColorArray);
Gl.DrawArrays(PrimitiveType.Triangles, 0, 3);
}
}
else
{
// Old school OpenGL
Gl.Begin(PrimitiveType.Triangles);
Gl.Color3(1.0f, 0.0f, 0.0f); Gl.Vertex2(0.0f, 0.0f);
Gl.Color3(0.0f, 1.0f, 0.0f); Gl.Vertex2(0.5f, 1.0f);
Gl.Color3(0.0f, 0.0f, 1.0f); Gl.Vertex2(1.0f, 0.0f);
Gl.End();
}
}
