protected override void OnPaint(PaintEventArgs e)
{
if (_updateCounter > 0)
{
return;
}
if (_ctx == null)
{
base.OnPaint(e);
}
else if (Monitor.TryEnter(_ctx))
{
try
{
//Direct OpenGL calls to this panel
Capture();
OnRender(e);
//Display newly rendered back buffer
_ctx.Swap();
//Check for errors
ErrorCode code = GL.GetError();
if (code != ErrorCode.NoError)
{
this.Reset(); //Stops the red X of death in its tracks
}
}
finally { Monitor.Exit(_ctx); }
}
}
protected override void OnPaint(PaintEventArgs e)
{
if (_updateCounter > 0)
{
return;
}
if (_ctx == null)
{
base.OnPaint(e);
}
else if (Monitor.TryEnter(_ctx))
{
try
{
//Direct OpenGL calls to this panel
Capture();
//Render background image
if (BackgroundImage != null)
{
RenderBackground();
}
else if (_updateImage && _bgImage != null)
{
_bgImage.Delete();
_bgImage = null;
_updateImage = false;
}
if (_bgColorChanged)
{
Vector3 v = (Vector3)BackColor;
GL.ClearColor(v._x, v._y, v._z, 0.0f);
_bgColorChanged = false;
}
//Set projection
if (_projectionChanged)
{
OnResized();
_projectionChanged = false;
}
//Apply camera
if (_camera != null)
fixed(Matrix *p = &_camera._matrix)
{
GL.MatrixMode(MatrixMode.Modelview);
GL.LoadMatrix((float *)p);
}
//Render 3D scene
OnRender(_ctx, e);
//Render selection overlay and/or text overlays
if ((_selecting && !_forceNoSelection) || _text.Count != 0)
{
GL.Color4(Color.White);
GL.PushAttrib(AttribMask.AllAttribBits);
GL.Disable(EnableCap.DepthTest);
GL.Disable(EnableCap.Lighting);
GL.Disable(EnableCap.CullFace);
GL.PolygonMode(MaterialFace.FrontAndBack, PolygonMode.Fill);
GL.MatrixMode(MatrixMode.Projection);
GL.PushMatrix();
GL.LoadIdentity();
Matrix p = Matrix.OrthographicMatrix(0, Width, 0, Height, -1, 1);
GL.LoadMatrix((float *)&p);
GL.MatrixMode(MatrixMode.Modelview);
GL.PushMatrix();
GL.LoadIdentity();
if (_text.Count != 0 && _textEnabled)
{
_text.Draw();
}
if (_selecting && !_forceNoSelection)
{
RenderSelection();
}
GL.PopAttrib();
GL.PopMatrix();
GL.MatrixMode(MatrixMode.Projection);
GL.PopMatrix();
}
GL.Finish();
_ctx.Swap();
ErrorCode code = GL.GetError();
if (code != ErrorCode.NoError)
{
this.Reset(); //Stops the red X of death in its tracks
}
}
finally { Monitor.Exit(_ctx); }
}
//Clear text values
//This will be filled until the next render
_text.Clear();
}