//Lit sphere
//

#include<iostream.h>
#include<GL/glut.h>
#include<math.h>
#include<stdlib.h>



void myinit(void)
{
    GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
    GLfloat mat_shininess[] = { 80.0 };
	GLfloat mat_diffuse[]={1.0, 1.0,0.0, 0.0};
    GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 };

    glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
    glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);
    glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
    glLightfv(GL_LIGHT0, GL_POSITION, light_position);

    glEnable(GL_LIGHTING);
    glEnable(GL_LIGHT0);
    glEnable(GL_DEPTH_TEST);
}

void display(void)
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glutSolidSphere(1.0, 50, 50);
    glFlush();
}

void myReshape(GLsizei w, GLsizei h)
{
    glViewport(0, 0, w, h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    if (w <= h) 
        glOrtho (-1.5, 1.5, -1.5*(GLfloat)h/(GLfloat)w, 
            1.5*(GLfloat)h/(GLfloat)w, -10.0, 10.0);
    else 
        glOrtho (-1.5*(GLfloat)w/(GLfloat)h, 
            1.5*(GLfloat)w/(GLfloat)h, -1.5, 1.5, -10.0, 10.0);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
}


int main(int argc, char** argv)
{
    glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
    glutInitWindowPosition (0, 0);
    glutInitWindowSize(500, 500);
    glutCreateWindow ("sphere");
    myinit();
    glutReshapeFunc (myReshape);
    glutDisplayFunc(display);
    glutMainLoop();

	
}