Lab Final (182-15-2164-PC-A)

#include <GL/glut.h>
#include <stdio.h>
#include <GL/gl.h>

void init(void)
{
    glClearColor(1.0,1.0,1.0,1.0);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluOrtho2D(-500, 500, -500, 700);
}

void display()
{
    glClear(GL_COLOR_BUFFER_BIT);

    //middle
    glBegin(GL_POLYGON);
    glColor3f(0.2, 0.5, 0.9) ;
    glVertex2d(-3, 350);
    glVertex2d(3, 350);
    glVertex2d(3, -50);
    glVertex2d(-3, -50);
    glEnd();

    //middle-top
    glBegin(GL_POLYGON);
    glColor3f(0.3,0.5,0.2);
    glVertex2d(-6, 353);
    glVertex2d(6, 353);
    glVertex2d(6, 350);
    glVertex2d(-6, 350);
    glEnd();

     //middle-bottom
    glBegin(GL_POLYGON);
    glColor3f(0.3,0.5,0.2);
    glVertex2d(-7, 10);
    glVertex2d(7, 10);
    glVertex2d(7, -45);
    glVertex2d(-7, -45);
    glEnd();

    //Umbrella Top
    int m=0;
    int n=190;
    int r=150;
    float x=m;
    float y=r;
    float p=1-r;
    while(x<=y)
    {
        glColor3f(0.3,0.5,0.2);
        glBegin(GL_POLYGON);
        if(p<0)
        {
            x++;
            p=p+(2*x)+1;
        }
        else if(p>=0)
        {
            x++;
            y--;
            p=p+(2*x)-(2*y)+1;
        }
        glVertex2d(m+x,n+y);
        glVertex2d(m+y,n+x);
        glVertex2d(m-y,n+x);
        glVertex2d(m-x,n+y);
        glEnd();
    }
    glFlush();
    glutSwapBuffers();
}

int main(int argc,char **argv)
{
    glutInit(&argc,argv);
    glutInitDisplayMode ( GLUT_RGB | GLUT_DOUBLE );
    glutInitWindowPosition(0,0);
    glutInitWindowSize(600,600);
    glutCreateWindow("Sohag Raha - 182-15-2164");
    init();
    glutDisplayFunc(display);
    glutMainLoop();
    return 0;
}