logo design using opengl and glut by c++(part-1)

logo design using OpenGL and glut by c++

#include <windows.h>

#ifdef __APPLE__

#include <GLUT/glut.h>

#else

#include <GL/glut.h>

#endif

#include <stdlib.h>

#include <GL/gl.h>

#include <GL/glut.h>

void display(void)

{

/* clear all pixels */

    glClear (GL_COLOR_BUFFER_BIT);

    glColor3f (1,1,1);

    glBegin(GL_POLYGON);

    glVertex3f (0.00, 0.50, 0.0);

    glVertex3f (0.50, 0.0, 0.0);

    glVertex3f (1.0, 0.50, 0.0);

    glVertex3f (0.50, 1.0, 0.0);

    glEnd();

  //1

    glColor3f (0,128,0);

    glBegin(GL_POLYGON);

    glVertex3f (0, 0.50, 0.0);

    glVertex3f (0.40, 0.10, 0.0);

    glVertex3f (0.40, 0.60, 0.0);

    glVertex3f (0.10, 0.60, 0.0);

    glEnd();

//2

  glColor3f (1,0,0);

    glBegin(GL_POLYGON);

    glVertex3f (0.40, 0.10, 0.0);

    glVertex3f (0.50, 0.0, 0.0);

    glVertex3f (0.90, 0.40, 0.0);

    glVertex3f (0.40, 0.40, 0.0);

    glEnd();

    //3

      glColor3f (1,0,1);

    glBegin(GL_POLYGON);

    glVertex3f (0.60, 0.40, 0.0);

    glVertex3f (0.90, 0.40, 0.0);

    glVertex3f (1.0, 0.50, 0.0);

    glVertex3f (0.60, 0.90, 0.0);

    glEnd();

    //4

      glColor3f (1,1,0);

    glBegin(GL_POLYGON);

    glVertex3f (0.10, 0.60, 0.0);

    glVertex3f (0.60, 0.60, 0.0);

    glVertex3f (0.60, 0.90, 0.0);

    glVertex3f (0.50, 1.0, 0.0);

    glEnd();

    glFlush ();

}

void init (void)

{

/* select clearing (background) color */

glClearColor (0.0, 0.0, 0.0, 0.0);

/* initialize viewing values */

glMatrixMode(GL_PROJECTION);

glLoadIdentity();

glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);

}

/*

* Declare initial window size, position, and display mode

* (single buffer and RGBA). Open window with "hello"

* in its title bar. Call initialization routines.

* Register callback function to display graphics.

* Enter main loop and process events.

*/

int main(int argc, char** argv)

{

glutInit(&argc, argv);

glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);

glutInitWindowSize (500, 500);

glutInitWindowPosition (100, 100);

glutCreateWindow ("hello");

init ();

glutDisplayFunc(display);

glutMainLoop();

return 0; /* ISO C requires main to return int. */

}

logo