Drawing 3D Object and Scenes | Computer Graphics Lab Manual | Anna University Chennai | Final Year IT Department

9:PROGRAM:

#include

#include

void drawCube(){

    glBegin(GL_QUADS);

    glColor3f(1,0,0);

    glVertex3f(1,1,1);

    glVertex3f(-1,1,1);

    glVertex3f(-1,-1,1);

    glVertex3f(1,-1,1);

    glColor3f(0,1,1);

    glVertex3f(1,1,-1);

    glVertex3f(-1,1,-1);

    glVertex3f(-1,-1,-1);

    glVertex3f(1,-1,-1);

    glColor3f(0,1,0);

    glVertex3f(1,1,1);

    glVertex3f(1,-1,1);

    glVertex3f(1,-1,-1);

    glVertex3f(1,1,-1);

    glColor3f(1,0,1);

    glVertex3f(-1,1,1);

    glVertex3f(-1,-1,1);

    glVertex3f(-1,-1,-1);

    glVertex3f(-1,1,-1);

    glColor3f(0,0,1);

    glVertex3f(1,1,1);

    glVertex3f(-1,1,1);

    glVertex3f(-1,1,-1);

    glVertex3f(1,1,-1);

    glColor3f(1,1,0);

    glVertex3f(1,-1,1);

    glVertex3f(-1,-1,1);

    glVertex3f(-1,-1,-1);

    glVertex3f(1,-1,-1);

    glEnd();

}

void idle(){

    glutPostRedisplay();}

float deg= 0.0;

void display(){

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glMatrixMode(GL_MODELVIEW);

    glLoadIdentity();

    glTranslatef(0,0,-3);

    deg += 0.01;

    glRotatef(2*deg,0,0,1);

    glRotatef(deg,0,1,0);

    drawCube();

glutSwapBuffers();

}

void reshape(int width,int height){

    glMatrixMode(GL_PROJECTION);

    glLoadIdentity();

    glViewport(0,0,width,height);

    float fovy = 60;

    float aspect_ratio = float(width) / height;

    float near_clip = 0.01;

    float far_clip = 100;

   gluPerspective(fovy, aspect_ratio, near_clip, far_clip );

   glMatrixMode(GL_MODELVIEW);

}

void key(unsigned char key,int x,int y){

    if(key == 27)//esc

        exit(0);}

void init(){

    glutInitWindowSize(800,600);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("Tutorial Basics");

   glutIdleFunc(idle);

    glutDisplayFunc(display);

    glutReshapeFunc(reshape);

    glutKeyboardFunc(key);

   glEnable(GL_DEPTH_TEST);

}

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

    glutInit(&argc, argv);

    init();

    glutMainLoop();

    return 0;

}