how can i build this as problem 2 of my code? #include #include #include #include #include "./freeglut-3.4.0/include/GL/freeglut.h" using namespace std; bool leftDown = false, rightDown = false; int lastPos[2]; float cameraPos[4] = { 0,1,4,1 }; int windowWidth = 640, windowHeight = 480; double xRot = 0; double yRot = 0; int curProblem = 1; // TODO: change this number to try different examples float specular[] = { 1.0, 1.0, 1.0, 1.0 }; float shininess[] = { 50.0 }; void problem1() { // TODO } void problem2() { //FIX HERE } void problem3() { //TO DO } void problem4() { //TO DO } void display() { glClearColor(0, 0, 0, 0); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glDisable(GL_LIGHTING); glEnable(GL_DEPTH_TEST); glBegin(GL_LINES); glColor3f(1, 0, 0); glVertex3f(0, 0, 0); glVertex3f(1, 0, 0); // x axis glColor3f(0, 1, 0); glVertex3f(0, 0, 0); glVertex3f(0, 1, 0); // y axis glColor3f(0, 0, 1); glVertex3f(0, 0, 0); glVertex3f(0, 0, 1); // z axis glEnd(/*GL_LINES*/); glEnable(GL_LIGHTING); glShadeModel(GL_SMOOTH); glMaterialfv(GL_FRONT, GL_SPECULAR, specular); glMaterialfv(GL_FRONT, GL_SHININESS, shininess); glEnable(GL_LIGHT0); glMatrixMode(GL_PROJECTION); glLoadIdentity(); glViewport(0, 0, windowWidth, windowHeight); float ratio = (float)windowWidth / (float)windowHeight; gluPerspective(50, ratio, 1, 1000); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); gluLookAt(cameraPos[0], cameraPos[1], cameraPos[2], 0, 0, 0, 0, 1, 0); glLightfv(GL_LIGHT0, GL_POSITION, cameraPos); glRotatef(xRot, 1, 0, 0); glRotatef(yRot, 0, 1, 0); if (curProblem == 1) problem1(); if (curProblem == 2) problem2(); if (curProblem == 3) problem3(); if (curProblem == 4) problem4(); glutSwapBuffers(); } void mouse(int button, int state, int x, int y) { if (button == GLUT_LEFT_BUTTON) leftDown = (state == GLUT_DOWN); else if (button == GLUT_RIGHT_BUTTON) rightDown = (state == GLUT_DOWN); lastPos[0] = x; lastPos[1] = y; } void mouseMoved(int x, int y) { if (leftDown) { xRot += (y - lastPos[1]) * .1; yRot += (x - lastPos[0]) * .1; } if (rightDown) { for (int i = 0; i < 3; i++) cameraPos[i] *= pow(1.1, (y - lastPos[1]) * .1); } lastPos[0] = x; lastPos[1] = y; glutPostRedisplay(); } void keyboard(unsigned char key, int x, int y) { curProblem = key - '0'; if (key == 'q' || key == 'Q' || key == 27) { exit(0); } glutPostRedisplay(); } void reshape(int width, int height) { windowWidth = width; windowHeight = height; glutPostRedisplay(); } int main(int argc, char** argv) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH); glutInitWindowSize(windowWidth, windowHeight); glutCreateWindow("HW2"); glutDisplayFunc(display); glutMotionFunc(mouseMoved); glutMouseFunc(mouse); glutReshapeFunc(reshape); glutKeyboardFunc(keyboard); glutMainLoop(); return 0; }.

1. how can i build this as problem 2 of my code?
#include
#include
#include
#include
#include "./freeglut-3.4.0/include/GL/freeglut.h"
using namespace std;
bool leftDown = false, rightDown = false;
int lastPos[2];
float cameraPos[4] = { 0,1,4,1 };
int windowWidth = 640, windowHeight = 480;
double xRot = 0;
double yRot = 0;
int curProblem = 1; // TODO: change this number to try different examples
float specular[] = { 1.0, 1.0, 1.0, 1.0 };
float shininess[] = { 50.0 };
void problem1() {
// TODO
}
void problem2() {
//FIX HERE
}
void problem3() {
//TO DO
}
void problem4() {
//TO DO
}
void display()
{
glClearColor(0, 0, 0, 0);

2. glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glDisable(GL_LIGHTING);
glEnable(GL_DEPTH_TEST);
glBegin(GL_LINES);
glColor3f(1, 0, 0); glVertex3f(0, 0, 0); glVertex3f(1, 0, 0); // x axis
glColor3f(0, 1, 0); glVertex3f(0, 0, 0); glVertex3f(0, 1, 0); // y axis
glColor3f(0, 0, 1); glVertex3f(0, 0, 0); glVertex3f(0, 0, 1); // z axis
glEnd(/*GL_LINES*/);
glEnable(GL_LIGHTING);
glShadeModel(GL_SMOOTH);
glMaterialfv(GL_FRONT, GL_SPECULAR, specular);
glMaterialfv(GL_FRONT, GL_SHININESS, shininess);
glEnable(GL_LIGHT0);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glViewport(0, 0, windowWidth, windowHeight);
float ratio = (float)windowWidth / (float)windowHeight;
gluPerspective(50, ratio, 1, 1000);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt(cameraPos[0], cameraPos[1], cameraPos[2], 0, 0, 0, 0, 1, 0);
glLightfv(GL_LIGHT0, GL_POSITION, cameraPos);
glRotatef(xRot, 1, 0, 0);
glRotatef(yRot, 0, 1, 0);
if (curProblem == 1) problem1();
if (curProblem == 2) problem2();
if (curProblem == 3) problem3();
if (curProblem == 4) problem4();
glutSwapBuffers();
}
void mouse(int button, int state, int x, int y)
{
if (button == GLUT_LEFT_BUTTON) leftDown = (state == GLUT_DOWN);
else if (button == GLUT_RIGHT_BUTTON) rightDown = (state == GLUT_DOWN);
lastPos[0] = x;
lastPos[1] = y;

3. }
void mouseMoved(int x, int y)
{
if (leftDown) {
xRot += (y - lastPos[1]) * .1;
yRot += (x - lastPos[0]) * .1;
}
if (rightDown) {
for (int i = 0; i < 3; i++)
cameraPos[i] *= pow(1.1, (y - lastPos[1]) * .1);
}
lastPos[0] = x;
lastPos[1] = y;
glutPostRedisplay();
}
void keyboard(unsigned char key, int x, int y)
{
curProblem = key - '0';
if (key == 'q' || key == 'Q' || key == 27) {
exit(0);
}
glutPostRedisplay();
}
void reshape(int width, int height)
{
windowWidth = width;
windowHeight = height;
glutPostRedisplay();
}
int main(int argc, char** argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
glutInitWindowSize(windowWidth, windowHeight);
glutCreateWindow("HW2");

4. glutDisplayFunc(display);
glutMotionFunc(mouseMoved);
glutMouseFunc(mouse);
glutReshapeFunc(reshape);
glutKeyboardFunc(keyboard);
glutMainLoop();
return 0;
}