OpenGL learning journey (I) DEV-C ++ installation glut

Recently, the company has never been able to do anything, so it began to visit the forum to pay attention to some things. I accidentally saw the information about the android game engine, so I started to learn OpenGL with a whim. I personally think this should be a foundation for learning the game engine. Recently I was reading the C programming language, so I plan to start learning OpenGL from the C language.

Maybe Java has been doing for a long time, especially do not like Microsoft's development interface, so I decided to use my favorite DEV-C ++.

DEV-C ++ originated from Bell Labs, but was updated a long time ago to 4.9.9.2. It will not be updated, and two derivative products will be replaced later.

DEV-C ++ comes with examples of OpenGL. File-> New-> Project-> multmedia-> OpenGL, you can build an OpenGL demo, which is a continuously rotating triangle after compilation and running.

I searched some OpenGL entry-level documents on the Internet, and recommended the glut toolkit, which is said to bring a lot of convenience.

So began to install glut for DEC-C ++.

Download the glut-3.7.6-bin of glut, which contains several files

Copy glut. H to the installation directory of DEV-C ++ under .. \ include \ GL.

Copy glut. Def to the Lib folder.

Copy the file to system c: \ windows \ system32.

Create a project

#define GLUT_DISABLE_ATEXIT_HACK#include <windows.h>#include <GL/glut.h>const int   A = 500;  /* length of a side of the monitor window */const float B = 500;  /* length of a side of the clipping rectangle */const float C = 200;  /* length of a side of the square the program draws */void myinit(void){  glClearColor(0.7, 0.7, 0.7, 0.0); /* gray background */   glMatrixMode(GL_PROJECTION);      /* In World coordinates: */  glLoadIdentity();                 /* position the "clipping rectangle" */  gluOrtho2D( -B/2, B/2, -B/2, B/2);/* at -B/2, its right edge at +B/2, its bottom */  glMatrixMode(GL_MODELVIEW);       /* edge at -B/2 and its top edge at +B/2 */}void display( void ){                                      glClear(GL_COLOR_BUFFER_BIT);     /* clear the window */   glMatrixMode(GL_MODELVIEW);       /* The following coordinates are expressed */  glLoadIdentity();                 /* in terms of World coordinates */  glBegin(GL_POLYGON) ;             /* draw a filled polygon */      glColor3f ( 1.0, 0.3, 0.2);       /* draw in light red */      glVertex2f( -C/2, -C/2 );         /* (x,y) */      glVertex2f(  C/2, -C/2 );         /* (x,y) */      glVertex2f(  C/2,  C/2 );         /* (x,y) */      glVertex2f( -C/2,  C/2 );         /* (x,y) */  glEnd();  glFlush();                        /* send all commands */}int main(int argc, char** argv){  glutInit(&argc,argv);  glutInitWindowSize( A, A );       /* A x A pixel screen window  */  glutInitDisplayMode( GLUT_RGB | GLUT_SINGLE);  glutCreateWindow("My Rectangle"); /* window title                   */  glutDisplayFunc(display);         /* tell OpenGL main loop what     */  myinit();                         /* set attributes                 */  glutMainLoop();                   /* pass control to the main loop  */  return 0;}

Please note:

#define GLUT_DISABLE_ATEXIT_HACK#include <windows.h>

These two lines must be included, if not added, will package error during compilation: 50 E: \ Program Files \ DEV-CPP \ include \ GL \ glut. h redeclaration of C ++ built-in type 'shport'

After adding it, it still cannot be compiled. You need to make some settings.

Project-project options-parameters add three files: libglu32.a, libglu32.a, and libopengl32.a

These three files are all in the Lib folder in the installation directory of the DEV-C ++.

Then compile and run

The result is as follows:

Here we end the first step of OpenGL learning.

Split line -------------------------------------------------------------------------

How to install glut, Google gave a lot of available information. But each compilation always appears: 50 E: \ Program Files \ DEV-CPP \ include \ GL \ glut. h redeclaration of C ++ built-in type 'short 'makes me struggle for a long time. Click here to open the link. Code added in the two lines

#define GLUT_DISABLE_ATEXIT_HACK#include <windows.h>

What does it mean? No specific explanation is found. We can infer from the name that some error messages should be ignored ......