OpenGL Entry Program for MFC

I have browsed a lot of OpenGL entry-level programs on the internet, either in the console or in Windows C programming, and I feel very inconvenient. So here I will give you an OpenGL entry-level program :)

Note: I will not talk about the OpenGL programming principles in windows. Refer to related books: D.

I know that those console programs and Windows C programs create very simple windows.

Here we will first describe the creation steps:

1. Create an MFC wizard named glframe, single document, and print support. By default, an OpenGL framework is generated.

2. Get a simple window style.

Add the precreatewindow code to cmianframe:

Bool cmainframe: precreatewindow (createstruct & CS)
{
If (! Cframewnd: precreatewindow (CS ))
Return false;

CS. Cx = 500;
CS. Cy = 400;
CS. lpszname = _ T ("OpenGL Framework Program ");
CS. Style & = ~ Fws_addtotitle; // do not add the title to the title bar
Return true;
}

3. Added OpenGL support:

Add the header file in cglframeview. h as follows:

# Include "Gl/Gl. H"
# Include "Gl/Glu. H"
# Include "Gl/Glaux. H"

In the project-> Settings-> Project Settings dialog box, select the link tab and add Glaux. Lib glu32.lib opengl32.lib to the object module library.

(Tip: Of course, you can also select "project"> "add to project"> "add FILE command". In the "Insert Files into project" dialog box that appears, convert it to the "vc98/lib" directory, select Glaux. lib, glu32.lib, and opengl32.lib files. Press OK to add them to the project file .)

(Write it here first, there is no time today, and I will write it tomorrow)

Today

The following operations are performed in cglframeview:

4. Add an RC handle and a public variable to the view.

Class cglframeview: Public cview

{

Public:

... // Other variables

Hglrc;

... // Other variables

}

5. Add message processing to the View:

Use classwizard to add the processing functions of wm_create, wm_destroy, and wm_size messages.

6. Modify the precreatewindow () function of cgframeview as follows:

Bool cglframeview: precreatewindow (createstruct & CS)
{
// Todo: Modify the window class or styles here by modifying
// The createstruct CS

CS. Style | = ws_clipsiblings | ws_clipchildren;
Return cview: precreatewindow (CS );
}

7. Modify the oncreate () function of cgframeview as follows:

Int cglframeview: oncreate (maid)
{
If (cview: oncreate (lpcreatestruct) =-1)
Return-1;
// ============================================
Pixelformatdescriptor PFD =
{
Sizeof (pixelformatdescriptor ),
1,
Pfd_draw_to_window | pfd_support_opengl |
Pfd_doublebuffer | pfd_support_gdi,
Pfd_type_rgba,
24,
0, 0, 0, 0, 0,
0,
0,
0,
0, 0, 0,
32,
0,
0,
Pfd_main_plane,
0,
0, 0
};

Cclientdc clientdc (this );
Int pF = choosepixelformat (clientdc. m_hdc, & PFD );
Bool RT = setpixelformat (clientdc. m_hdc, PF, & PFD );
Hglrc = wglcreatecontext (clientdc. m_hdc );
// ================================================ ========================
Return 0;
}
8. Modify the ondestroy () function of cgframeview as follows:

Void cglframeview: ondestroy ()
{
Cview: ondestroy ();
 
// Todo: add your message handler code here
If (wglgetcurrentcontext ()! = NULL)
Wglmakecurrent (null, null );
If (hglrc! = NULL)
{
Wgldeletecontext (hglrc );
Hglrc = NULL;
}
}

9. Modify the onsize () function of cgframeview as follows:

Void cglframeview: onsize (uint ntype, int CX, int CY)
{
Cview: onsize (ntype, CX, CY );

Glsizei W = Cx;
Glsizei H = Cy;
If (! H)
Return;
Cclientdc clientdc (this );
Wglmakecurrent (clientdc. m_hdc, hglrc );
Glviewport (0, 0, W, H );
Wglmakecurrent (null, null );
/**/
 
}

The above is the basic work that must be done well in OpenGL programming ^ _*

Add the line and teapot part tomorrow to complete this example.