3D view in computer graphics using c++

/*Faisal Porag
স্বপ্নের প্রতিবিম্ব...*/

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

void initRendering() {
glEnable(GL_DEPTH_TEST);
}

//Called when the window is resized
void handleResize(int w, int h) {
glViewport(0, 0, w, h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0, (double)w / (double)h, 1.0, 200.0);
}

float _angle = 0.0;
float _cameraAngle = 0.0;
float _ang_tri = 0.0;
float _angle_2 = 90;
float i = 0.0f;


void drawScene() {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

// glColor3f(1.0, 0.0, 0.0);

glMatrixMode(GL_MODELVIEW); //Switch to the drawing perspective
glLoadIdentity(); //Reset the drawing perspective
glRotatef(-_cameraAngle, 0.0, 1.0, 0.0); //Rotate the camera
glTranslatef(0.0, 0.0, -3.0); //Move forward 5 units

//
glPushMatrix();

    glPushMatrix();
    glColor3f(0.0,.9,.8);
    glTranslatef(0.6,-0.1,0.0);
    glRotatef(_angle,0.0,1.0,0.0);
    glutWireSphere(.33,40,40);
    glPopMatrix();


    glPushMatrix();
    glColor3f(0.6,0.0,0.6);
    glTranslatef(0.05,-0.1,0.0);
    glRotatef(-71,1.0,0.0,0.0);
    glRotatef(_angle,0.0,0.0,1.0);
    glutWireCone(.30,.68,20,20); //(GLdouble base, GLdouble height,GLint slices, GLint stacks);
    glPopMatrix();



    glPushMatrix();
    glColor3f(0.0,0.0,1.0);
    glTranslatef(0.08,0.25,0.0);
    glScalef(0.85,0.85,0);
    glRotatef(-134,1.7,1.7,1.0);
    glRotatef(_angle,0.0,0.0,1.0);
    glutWireTorus(.11, .31, 45, 45); //(GLdouble innerRadius,GLdouble outerRadius,GLint nsides, GLint rings);
    glPopMatrix();



glPopMatrix();
glutSwapBuffers();
}

void update(int value) {
_angle += 2.0f;
if (_angle > 360) {
_angle -= 360;
}

glutPostRedisplay(); //Tell GLUT that the display has changed

//Tell GLUT to call update again in 25 milliseconds
glutTimerFunc(25, update, 0);
}

int main(int argc, char** argv) {
//Initialize GLUT
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
glutInitWindowSize(900, 600);

//Create the window
glutCreateWindow("Transformations and Timers - videotutorialsrock.com");
initRendering();

//Set handler functions
glutDisplayFunc(drawScene);

glutReshapeFunc(handleResize);

glutTimerFunc(25, update, 0); //Add a timer

glutMainLoop();
return 0;
}

output:

//Just try this ............ :)
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