OpenGL (ii) Using Glut for display window management

1. Create an OpenGL project in VS2013

Select File->new->project, then select Win32 Console Application, select a name, then press OK.

On the left side of the dialog box, click Application Settings, find the empty project and tick on it and select Finish.

Then add a code file to the project named "OPENGL.C" and pay attention to using. C as the end of the file.

Done, it is no different from the usual project.

2. First OpenGL Program

　　

1 //Glut's header file2 //originally OpenGL program will generally include <GL/gl.h> and <gl/glu.h>, but the GLUT header file has automatically included these two files, do not have to contain3#include <glut.h>4 5 voidMydisplay (void)6 7 {8     //indicates clear color9 glclear (gl_color_buffer_bit);Ten  One     //draw a rectangle. The four parameters represent the horizontal and vertical coordinates of two points on the diagonal, respectively. AGLRECTF (-0.5f, -0.5f,0.5f,0.5f); -  -     //ensure that the previous OpenGL commands execute immediately (instead of having them wait in the buffer) the Glflush (); -  - } -  + //main function with command-line arguments - intMainintargcChar*argv[]) +  A { at     //functions that begin with glut are the functions provided by the GLUT Toolkit -  -     //to initialize the glut, this function must be called once before other glut are used. Its format is more rigid, the general copy of this sentence glutinit (&ARGC, argv) can be -Glutinit (&argc, argv); -  -     //sets the display mode, where GLUT_RGB indicates the use of RGB colors, and also Glut_index (which indicates the use of indexed colors).  in     //Glut_single means using a single buffer, corresponding to the glut_double (using double buffering) -Glutinitdisplaymode (Glut_rgb |glut_single); to  +     //set the position of the window in the screen -Glutinitwindowposition ( -, -); the  *     //set the size of the window $Glutinitwindowsize ( -, -);Panax Notoginseng  -     //creates a window based on the information previously set. Parameter will be used as the caption of the window the     //Note: When the window is created, it is not immediately displayed to the screen. You need to call Glutmainloop to see the window +Glutcreatewindow ("First OpenGL program"); A  the     //The callback function registered through GLUTDISPLAYFUNC () is executed whenever glut determines that the contents of a window need to be re-displayed +     //all the code needed to redraw the scene should be placed in the display callback function.  -Glutdisplayfunc (&mydisplay); $  $     //all the windows that have been created will be displayed at this point, and the rendering of these windows is now in effect . -     //The event processing loop starts and the registered display callback function is triggered. Once you enter the loop, it never quits.  - Glutmainloop (); the  -     return 0;Wuyi  the}

The function of the program is to draw a white rectangle in the center of a black window. For details, please see the Note ~ ~

This is the simple first OpenGL program ~ ~

OpenGL (ii) Using Glut for display window management