/// <summary>
///
/// </summary>
/// <param name="e"></param>
protected override void OnSizeChanged(EventArgs e)
{
base.OnSizeChanged(e);
int width = this.Width, height = this.Height;
if (width > 0 && height > 0)
{
FBORenderContext renderContext = this.renderContext;
if (renderContext != null)
{
renderContext.MakeCurrent();
renderContext.SetDimensions(width, height);
OpenGL.Viewport(0, 0, width, height);
if (this.designMode)
{
GLCanvasHelper.ResizeGL(width, height);
}
this.Invalidate();
}
}
}
protected override void OnPaint(PaintEventArgs e)
{
RenderContext renderContext = this.renderContext;
if (renderContext == null)
{
base.OnPaint(e);
return;
}
stopWatch.Restart();
// Make sure it's our instance of openSharpGL that's active.
renderContext.MakeCurrent();
if (this.designMode)
{
// 天蓝色背景
OpenGL.ClearColor(0x87 / 255.0f, 0xce / 255.0f, 0xeb / 255.0f, 0xff / 255.0f);
GLCanvasHelper.ResizeGL(this.Width, this.Height);
GLCanvasHelper.DrawPyramid();
}
else
{
// If there is a draw handler, then call it.
DoOpenGLDraw(e);
}
// Blit our offscreen bitmap.
Graphics graphics = e.Graphics;
IntPtr deviceContext = graphics.GetHdc();
renderContext.Blit(deviceContext);
graphics.ReleaseHdc(deviceContext);
stopWatch.Stop();
this.FPS = 1000.0 / stopWatch.Elapsed.TotalMilliseconds;
}
/// <summary>
///
/// </summary>
protected virtual void DesignModeRender()
{
// Sky blue fore background.
//OpenGL.ClearColor(0x87 / 255.0f, 0xce / 255.0f, 0xeb / 255.0f, 0xff / 255.0f);
OpenGL.ClearColor(0, 0, 0, 0);
// Clear the color and depth buffer.
OpenGL.Clear(OpenGL.GL_COLOR_BUFFER_BIT | OpenGL.GL_DEPTH_BUFFER_BIT | OpenGL.GL_STENCIL_BUFFER_BIT);
GLCanvasHelper.DrawClock();
OpenGL.DrawText(10,
10, Color.White, "Courier New",// "Courier New",
25.0f, this.GetType().FullName);
if (this.RenderTrigger == RenderTrigger.TimerBased)
{
OpenGL.DrawText(10,
this.Height - 20 - 1, Color.Red, "Courier New",// "Courier New",
20.0f, string.Format("FPS: {0}", this.FPS.ToShortString()));
}
}
/// <summary>
///
/// </summary>
protected virtual void CreateRenderContext()
{
// Initialises OpenGL.
var renderContext = new FBORenderContext();
// Create the render context.
renderContext.Create(Width, Height, 32, null);
this.renderContext = renderContext;
renderContext.MakeCurrent();
// Set the most basic OpenGL styles.
OpenGL.ShadeModel(OpenGL.GL_SMOOTH);
OpenGL.ClearDepth(1.0f);
OpenGL.Enable(OpenGL.GL_DEPTH_TEST);
OpenGL.DepthFunc(OpenGL.GL_LEQUAL);
OpenGL.Hint(OpenGL.GL_PERSPECTIVE_CORRECTION_HINT, OpenGL.GL_NICEST);
if (this.designMode)
{
GLCanvasHelper.ResizeGL(this.Width, this.Height);
}
}
