// Context control event handlers
protected virtual void GlInitialize(object sender, EventArgs e)
{
// Set up and declare contexts
m_uint_HWND = (uint)this.Handle.ToInt32();
m_uint_DC = WGL.GetDC(m_uint_HWND);
WGL.wglSwapBuffers(m_uint_DC);
// Define pixel format
WGL.PIXELFORMATDESCRIPTOR pfd = new WGL.PIXELFORMATDESCRIPTOR();
WGL.ZeroPixelDescriptor(ref pfd);
pfd.nVersion = 1;
pfd.dwFlags = (WGL.PFD_DRAW_TO_WINDOW | WGL.PFD_SUPPORT_OPENGL | WGL.PFD_DOUBLEBUFFER);
pfd.iPixelType = (byte)(WGL.PFD_TYPE_RGBA);
pfd.cColorBits = 32;
pfd.cDepthBits = 32;
pfd.iLayerType = (byte)(WGL.PFD_MAIN_PLANE);
int pixelFormatIndex = 0;
pixelFormatIndex = WGL.ChoosePixelFormat(m_uint_DC, ref pfd);
// Check and set pixel format
if (pixelFormatIndex == 0)
{
MessageBox.Show("Unable to retrieve pixel format");
return;
}
if (WGL.SetPixelFormat(m_uint_DC, pixelFormatIndex, ref pfd) == 0)
{
MessageBox.Show("Unable to set pixel format");
return;
}
// Initialize rendering context
m_uint_RC = WGL.wglCreateContext(m_uint_DC);
if (m_uint_RC == 0)
{
MessageBox.Show("Unable to get rendering context");
return;
}
if (WGL.wglMakeCurrent(m_uint_DC, m_uint_RC) == 0)
{
MessageBox.Show("Unable to make rendering context current");
return;
}
// Initialize OpenGl view and properties
GlResize(null, null);
GL.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
GL.glEnable(GL.GL_DEPTH_TEST);
GL.glDepthFunc(GL.GL_LEQUAL);
//GL.glEnable(GL.GL_CULL_FACE);
GL.glCullFace(GL.GL_BACK);
}
protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
{
// Check for context handles
if (m_uint_DC == 0 || m_uint_RC == 0)
{
return;
}
// Don't render anything with base context; just clear and flush
GL.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
GL.glLoadIdentity();
GL.glFlush();
WGL.wglSwapBuffers(m_uint_DC);
}
// Overriden control behavior
protected override void Dispose(bool disposing)
{
if (disposing)
{
if (m_uint_RC != 0)
{
WGL.wglDeleteContext(m_uint_RC);
m_uint_RC = 0;
}
if (components != null)
{
components.Dispose();
}
}
base.Dispose(disposing);
}
protected virtual void GlResize(object sender, EventArgs e)
{
// Check for and refresh context handles
if (m_uint_DC == 0 || m_uint_RC == 0)
{
return;
}
if (this.Width == 0 || this.Height == 0)
{
return;
}
WGL.wglMakeCurrent(m_uint_DC, m_uint_RC);
// Reset view and model matrix stacks with new dimensions
GL.glViewport(0, 0, this.Width, this.Height);
GL.glMatrixMode(GL.GL_PROJECTION);
GL.glLoadIdentity();
GLU.gluPerspective(60.0, ((double)(this.Width) / (double)(this.Height)), 1.0, 1000.0);
GL.glMatrixMode(GL.GL_MODELVIEW);
GL.glLoadIdentity();
}
