// handle 3d view rendering
public void ResetCameraView()
{
m_camera.ResetView(0, -200, 0, 20, 20);
m_axisCam.ResetView(0, -100, 0, 20, 0);
UpdateView();
}
public void ResetCameraView()
{
m_camera.ResetView(0, -200, 0, 20, 20);
}
// handle 3d view rendering
public void ResetCameraView()
{
m_camera.ResetView(0, -200, 0, 20, 20);
// glControl1.Invalidate();
UpdateView();
}
/// <summary>
/// This function will take an object, move the camera a distance away and generate the preview
/// </summary>
/// <param name="xsize"></param>
/// <param name="ysize"></param>
/// <param name="obj"></param>
/// <returns></returns>
public Bitmap GeneratePreview(int xsize, int ysize, List <Object3d> objs)
{
if (ViewAngle == ePreview.None)
{
return(null);
}
try
{
// taken from http://www.opentk.com/doc/graphics/frame-buffer-objects
// more good examples here: http://www.opentk.com/node/1642?page=1
// find scene extents
Point3d minext = new Point3d(999999, 999999, 999999);
Point3d maxext = new Point3d(-999999, -999999, -999999);
foreach (Object3d obj in objs)
{
minext.x = Math.Min(obj.m_min.x, minext.x);
minext.y = Math.Min(obj.m_min.y, minext.y);
minext.z = Math.Min(obj.m_min.z, minext.z);
maxext.x = Math.Max(obj.m_max.x, maxext.x);
maxext.y = Math.Max(obj.m_max.y, maxext.y);
maxext.z = Math.Max(obj.m_max.z, maxext.z);
}
int FboWidth = xsize;
int FboHeight = ysize;
uint FboHandle;
uint ColorTexture;
uint DepthRenderbuffer;
GLCamera previewcamera = new GLCamera();
//OpenTK.Matrix4 projection = OpenTK.Matrix4.CreatePerspectiveFieldOfView(0.55f, (float)xsize / (float)ysize, 1, 2000);
// Create Color Texture
GL.GenTextures(1, out ColorTexture);
GL.BindTexture(TextureTarget.Texture2D, ColorTexture);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.Nearest);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Nearest);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int)TextureWrapMode.Clamp);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)TextureWrapMode.Clamp);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba8, FboWidth, FboHeight, 0, PixelFormat.Rgba, PixelType.UnsignedByte, IntPtr.Zero);
// test for GL Error here (might be unsupported format)
GL.BindTexture(TextureTarget.Texture2D, 0); // prevent feedback, reading and writing to the same image is a bad idea
// Create Depth Renderbuffer
GL.Ext.GenRenderbuffers(1, out DepthRenderbuffer);
GL.Ext.BindRenderbuffer(RenderbufferTarget.RenderbufferExt, DepthRenderbuffer);
GL.Ext.RenderbufferStorage(RenderbufferTarget.RenderbufferExt, (RenderbufferStorage)All.DepthComponent32, FboWidth, FboHeight);
// test for GL Error here (might be unsupported format)
// Create a FBO and attach the textures
GL.Ext.GenFramebuffers(1, out FboHandle);
GL.Ext.BindFramebuffer(FramebufferTarget.FramebufferExt, FboHandle);
GL.Ext.FramebufferTexture2D(FramebufferTarget.FramebufferExt, FramebufferAttachment.ColorAttachment0Ext, TextureTarget.Texture2D, ColorTexture, 0);
GL.Ext.FramebufferRenderbuffer(FramebufferTarget.FramebufferExt, FramebufferAttachment.DepthAttachmentExt, RenderbufferTarget.RenderbufferExt, DepthRenderbuffer);
// now GL.Ext.CheckFramebufferStatus( FramebufferTarget.FramebufferExt ) can be called, check the end of this page for a snippet.
// since there's only 1 Color buffer attached this is not explicitly required
GL.DrawBuffer((DrawBufferMode)FramebufferAttachment.ColorAttachment0Ext);
GL.PushAttrib(AttribMask.ViewportBit); // stores GL.Viewport() parameters
GL.Viewport(0, 0, FboWidth, FboHeight);
// render whatever your heart desires, when done ...
// clear buffer
//GL.ClearColor(Color.White);
// clear the screen, to make it very obvious what the clear affected. only the FBO, not the real framebuffer
GL.ClearColor(BackColor);
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
//set up camera for the specified view
float bmpaspect = (float)xsize / (float)ysize;
switch (ViewAngle)
{
case ePreview.Front:
SetProjection(bmpaspect, minext.x, maxext.x, minext.z, maxext.z);
previewcamera.ResetView(0, -50, 0, 0, 0);
break;
case ePreview.Back:
SetProjection(bmpaspect, -maxext.x, -minext.x, minext.z, maxext.z);
previewcamera.ResetView(0, 50, 0, 0, 0);
break;
case ePreview.Top:
SetProjection(bmpaspect, minext.x, maxext.x, minext.y, maxext.y);
previewcamera.ResetView(0, -50, 0, 90, 0);
break;
case ePreview.Bottom:
SetProjection(bmpaspect, minext.x, maxext.x, -maxext.y, -minext.y);
previewcamera.ResetView(0, -50, 0, -90, 0);
break;
case ePreview.Right:
SetProjection(bmpaspect, minext.y, maxext.y, minext.z, maxext.z);
previewcamera.ResetView(50, 0, 0, 0, 0);
break;
case ePreview.Left:
SetProjection(bmpaspect, -maxext.y, -minext.y, minext.z, maxext.z);
previewcamera.ResetView(-50, 0, 0, 0, 0);
break;
case ePreview.Isometric:
float oldscale = Scale;
Scale = ((Scale + 1f) * 1.4f) - 1f;
SetProjection(bmpaspect, minext.x, maxext.x, minext.z, maxext.z);
Scale = oldscale;
previewcamera.ResetView(50, -50, 0, 30, 0);
break;
}
//previewcamera.ResetView(0, -200, 0, 20, 20);
//previewcamera.ResetView(0, -200, obj.m_radius/2, 0, 00);
// setup projection matrix
GL.MatrixMode(MatrixMode.Projection);
GL.LoadMatrix(ref projection);
GL.MatrixMode(MatrixMode.Modelview);
previewcamera.SetViewGL();
//render scene
foreach (Object3d obj in objs)
{
obj.InvalidateList();
obj.RenderGL(false, false, false, SceneColor);
obj.InvalidateList();
}
//copy the framebuffer to a bitmap
Bitmap bmppreview = GetBitmap(xsize, ysize);
GL.PopAttrib(); // restores GL.Viewport() parameters
GL.Ext.BindFramebuffer(FramebufferTarget.FramebufferExt, 0); // return to visible framebuffer
GL.DrawBuffer(DrawBufferMode.Back);
return(bmppreview);
}
catch (Exception ex)
{
DebugLogger.Instance().LogError(ex);
return(null);
}
}
