fluidfeel

/** Simple OpenGL Program
 *=============================================================================!
 *
 *  Program: simple_OpenGL.cpp
 *
 *  by (BeH)
 *
 *  A simple, introductory OpenGL program.
 *
 *=============================================================================!
 */
#include <stdio.h>
#include <stdlib.h>

#include <gl/glew.h>
#include <gl/glut.h>

// function prototypes
void showOpenGLInfo( void );
void display( void );

/******************************************************************************!
* Main OpenGL program
******************************************************************************!
*/
int main( int argc, char *argv[] )
{
      // init GLUT and create Window
      glutInit( &argc, argv );
      glutInitDisplayMode( GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH );
      glutInitWindowSize( 320, 320 );
      glutInitWindowPosition( 100, 100 );
      glutCreateWindow( "OpenGL: A Simple Window" );
      showOpenGLInfo();

      // register callbacks
      glutDisplayFunc( display );

      // enter GLUT event processing cycle
      glutMainLoop();

      return 0;
}

/******************************************************************************!
 * show OpenGL Info through the Console
 ******************************************************************************!
 */
void  showOpenGLInfo( void )
{
      if (glewInit() != GLEW_OK) {
            fprintf( stderr, "Error: %s\n", glewGetErrorString(glewInit()) );
            exit(0);
      }
      fprintf( stderr, "OpenGL Vender: %s\n", glGetString(GL_VENDOR) );
      fprintf( stderr, "OpenGL Version: %s\n", glGetString(GL_VERSION) );
      fprintf( stderr, "GLU Version: %s\n", gluGetString(GLU_VERSION) );
      fprintf( stderr, "GLEW Version: %s\n", glewGetString(GLEW_VERSION) );

      return;
}

/******************************************************************************!
 * draw graphics
 ******************************************************************************!
 */
void  display( void )
{
      glClearColor( 0.0f, 0.0f, 0.0f, 1.0f );
      glClear( GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT );

      glColor4f( 1.0, 1.0, 0.0, 1.0 );
      glBegin( GL_TRIANGLES );
            glVertex3f( -0.5,-0.5, 0.0 );
            glVertex3f( 0.5,-0.5, 0.0 );
            glVertex3f( 0.0, 0.5, 0.0 );
      glEnd();

      glFlush();
}