Star Drawing with OpenGL

Draw 4 stars in screen with OpenGL
Screenshot:
lab3-star drawing

Code:

#include <windows.h>
#include <GL\glut.h>

void myInit (void)

{

    glClearColor(0.0,0.0,0.0,0.0); // sets background color to white

    // sets a point to be 4x4 pixels

    glMatrixMode(GL_PROJECTION);

    glLoadIdentity();

    gluOrtho2D(0.0, 500.0, 0.0, 400.0); // the display area in world coordinates.

}


void myDisplay(void)

{

    glClear(GL_COLOR_BUFFER_BIT); // clears the screen
    ;// setsthe drawing colour

    glPointSize(4.0);

//Axis
    glColor3f(1.0f,0.0f,1.0f) ;
    glBegin(GL_LINES);
    glVertex2i(255,0);
    glVertex2i(255,500);

    glVertex2i(0,200);
    glVertex2i(500,200);

    glEnd();

    glColor3f(1.0f,0.0f,0.0f);
//
    glColor3f(1.0f,1.0f,0.0f) ;
    glBegin(GL_POLYGON);
//bottom

    glVertex2i (40,50);
    glVertex2i (60,50);
//left
    glVertex2i (40,50);
    glVertex2i (40,80);
//top
    glVertex2i (40,80);
    glVertex2i (60,80);
//right
    glVertex2i (60,50);
    glVertex2i (60,80);

    glEnd();
//BOTTOM TRIANGLE
    glColor3f(1.0f,0.0f,0.0f) ;
    glBegin(GL_POLYGON);
//bottom

    glVertex2i (40,50);
    glVertex2i (60,50);
//left
    glVertex2i (40,50);
    glVertex2i (50,30);

//RIGHT
    glVertex2i (60,50);
    glVertex2i (50,30);

    glEnd();

//RIGHT TRIANGLE
    glColor3f(1.0f,0.0f,0.0f) ;
    glBegin(GL_POLYGON);
//bottom

    glVertex2i (60,50);
    glVertex2i (60,80);

    glVertex2i (60,50);
    glVertex2i (70,60);

    glVertex2i (60,80);
    glVertex2i (70,60);

    glEnd();

//left triangle
    glColor3f(1.0f,0.0f,0.0f) ;
    glBegin(GL_POLYGON);

    glVertex2i (40,50);
    glVertex2i (40,80);

    glVertex2i (40,50);
    glVertex2i (30,64);

    glVertex2i (40,80);
    glVertex2i (30,62);

    glEnd();


//Top triangle
    glColor3f(1.0f,0.0f,0.0f) ;
    glBegin(GL_POLYGON);

    glVertex2i (40,80);
    glVertex2i (60,80);

    glVertex2i (40,80);
    glVertex2i (50,90);

    glVertex2i (60,80);
    glVertex2i (50,90);


    glEnd();

    glColor3f(1.0f, 0.0f, 0.0f);
    glRectf(120,120, 100, 100);


    glColor3f(1.0f,1.0f,0.0f) ;
    glBegin(GL_POLYGON);
//RIGHT

    glVertex2i (120,120);
    glVertex2i (120,100);

    glVertex2i (120,120);
    glVertex2i (150,110);

    glVertex2i (120,100);
    glVertex2i (150,110);
    glEnd();

    glBegin(GL_LINES);
    //RIGHT
    glVertex2i (120,120);
    glVertex2i (120,100);

    glVertex2i (120,120);
    glVertex2i (150,110);

    glVertex2i (120,100);
    glVertex2i (150,110);
    glEnd();

    //left
    glBegin(GL_POLYGON);
    glVertex2i (100,120);
    glVertex2i (62,107);

    glVertex2i (100,100);
    glVertex2i (62,107);
    glEnd();


    glColor3f(0.0f,0.0f,1.0f) ;
    glBegin(GL_POLYGON);
    glVertex2i (100,120);
    glVertex2i (110,130);

    glVertex2i(110,130);
    glVertex2i (120,120);
    glEnd();


    glColor3f(0.0f,0.0f,1.0f) ;
    glBegin(GL_POLYGON);
    glVertex2i (100,98);
    glVertex2i(110,70);

    glVertex2i (120,98);
    glVertex2i(110,70);


    glEnd();

glColor3f(1.0f,1.0f,1.0f);
glBegin(GL_POLYGON);
    glVertex2i (350,290);
    glVertex2i (350,315);

     glVertex2i (350,290);
     glVertex2i(370,290);

    glVertex2i (370,290);
    glVertex2i (370,315);

glVertex2i (350,315);
glVertex2i (370,315);


glEnd();

glColor3f(0.0f,0.0f,1.0f) ;
glBegin(GL_POLYGON);
glVertex2i (350,315);
glVertex2i (362,325);

glVertex2i (370,315);
glVertex2i (362,325);

glEnd();

//
glColor3f(0.0f,0.0f,1.0f) ;
glBegin(GL_POLYGON);
glVertex2i (370,290);
glVertex2i (385,305);

glVertex2i (370,315);
glVertex2i (385,305);

glEnd();


glColor3f(0.0f,0.0f,1.0f) ;
glBegin(GL_POLYGON);
 glVertex2i (350,290);
  glVertex2i (320,305);

  glVertex2i (350,315);
  glVertex2i (320,305);

glEnd();


glColor3f(0.0f,0.0f,1.0f) ;
glBegin(GL_POLYGON);
glVertex2i (350,290);
glVertex2i (362,270);

glVertex2i (370,290);
glVertex2i (362,270);

glEnd();

glColor3f(0.0f,0.0f,1.0f) ;
glBegin(GL_POLYGON);

glVertex2i (70,275);
glVertex2i (70,290);

glVertex2i(70,290);
glVertex2i(85,290);

glVertex2i(85,290);
glVertex2i(85,275);

glVertex2i(85,275);
glVertex2i(70,275);

glEnd();

glColor3f(1.0f,1.0f,1.0f);
glBegin(GL_POLYGON);
glVertex2i(70,275);
glVertex2i(76,220);

glVertex2i(85,275);
glVertex2i(76,220);

glEnd();


glColor3f(1.0f,1.0f,1.0f);
glBegin(GL_POLYGON);

glVertex2i(85,275);
glVertex2i(120,280);

glVertex2i(85,290);
glVertex2i(120,280);
glEnd();


glColor3f(1.0f,1.0f,1.0f);
glBegin(GL_POLYGON);

glVertex2i(70,275);
glVertex2i(38,280);

glVertex2i(70,290);
glVertex2i(38,280);
glEnd();


glColor3f(1.0f,1.0f,1.0f);
glBegin(GL_POLYGON);
glVertex2i(70,290);
glVertex2i(76,335);


glVertex2i(85,290);
glVertex2i(76,335);
glEnd();

    glFlush(); // sends all output to display;

}
int main (int argc, char **argv)
{

    glutInit (&argc, argv); // to initialize the toolkit;

    glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB); // sets the display mode

    glutInitWindowSize (640, 480); // sets the window size

    glutInitWindowPosition (10, 10); // sets the starting position for the window

    glutCreateWindow ("My first OpenGL program!"); // creates the window and sets the title

    glutDisplayFunc (myDisplay);
    myInit(); // additional initializations as necessary
    glutMainLoop(); // go into a loop until event occurs
    return 0;
}

 

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Author: zakilive

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