OpenGL blank screen? - c++

Question

I am learning OpenGL from book, I did exactly what is in the book, but when I run it (Eclipse C++ IDE) I get just blank screen.
Book is "OpenGL guide for programmers". I think the error is in Reshape(), but code is from book.
#include <iostream>
#include <GL/glew.h>
#include <GL/glut.h>
typedef const char* String;
String TITLE = "OpenGL";
int HEIGHT = 480;
int WIDTH = HEIGHT / 9 * 12;
void Update(int time){
glutPostRedisplay();
glutTimerFunc( 10, Update, 1);
}
void Init(){
glClearColor(1.0, 1.0, 1.0, 0.0);
glShadeModel(GL_FLAT);
}
void Render(){
glClear(GL_COLOR_BUFFER_BIT);
glColor3f(1.0, 1.0, 0.0);
glLoadIdentity();
gluLookAt(0.0, 0.0, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
glScalef(1.0, 2.0, 1.0); // Modeling transformation
glutWireCube(1.0);
glutSwapBuffers();
}
void Reshape(int w, int h){
glViewport(0, 0, (GLsizei) w, (GLsizei) h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
}
int main(int argc, char** argv){
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA);
glutInitWindowSize(WIDTH, HEIGHT);
glutCreateWindow(TITLE);
glewExperimental = true;
GLenum err = glewInit();
if(err!=GLEW_OK){
exit(1);
}
Init();
Update(1);
glutDisplayFunc(Render);
glutReshapeFunc(Reshape);
glutMainLoop();
return 0;
}

Answer 1

Yes reshape function is definitely wrong
use that
void Reshape(GLsizei w,GLsizei h)
{
glViewport(0,0,w,h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
if (h == 0)
h = 1;
GLfloat aspectRatio;
aspectRatio = static_cast<GLfloat>(w) / static_cast<GLfloat>(h);
gluPerspective(45.0,aspectRatio,1.0,4000.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
instead