Rotating object spotlight shadow - c++

Question

I have to rotate an object in front of a background. I have to light it with a spotlight and show the shadow on the object and on the background.
My problem is when I rotate the object the shadow doesn't change.
Here is my code:
#include "stdafx.h"
#include <windows.h>
#include <GL/glut.h>
#include <stdlib.h>
GLfloat qaBlack[] = { 0.0, 0.0, 0.0, 1.0 }; //Black Color
GLfloat qaGreen[] = { 0.0, 1.0, 0.0, 1.0 }; //Green Color
GLfloat qaWhite[] = { 1.0, 1.0, 1.0, 1.0 }; //White Color
GLfloat qaRed[] = { 1.0, 0.0, 0.0, 1.0 }; //White Color
GLfloat angleShape = 0.0f;
void CreateShape()
{
// Set material properties
glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, qaGreen);
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, qaGreen);
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, qaWhite);
glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 20);
glBegin(GL_TRIANGLES); // Begin drawing the pyramid with 4 triangles
// Front
glColor3f(1.0f, 0.0f, 0.0f); // Red
glVertex3f(0.0f, 1.0f, 0.0f);
glColor3f(0.0f, 1.0f, 0.0f); // Green
glVertex3f(-1.0f, -1.0f, 1.0f);
glColor3f(0.0f, 0.0f, 1.0f); // Blue
glVertex3f(1.0f, -1.0f, 1.0f);
// Right
glColor3f(1.0f, 0.0f, 0.0f); // Red
glVertex3f(0.0f, 1.0f, 0.0f);
glColor3f(0.0f, 0.0f, 1.0f); // Blue
glVertex3f(1.0f, -1.0f, 1.0f);
glColor3f(0.0f, 1.0f, 0.0f); // Green
glVertex3f(1.0f, -1.0f, -1.0f);
// Back
glColor3f(1.0f, 0.0f, 0.0f); // Red
glVertex3f(0.0f, 1.0f, 0.0f);
glColor3f(0.0f, 1.0f, 0.0f); // Green
glVertex3f(1.0f, -1.0f, -1.0f);
glColor3f(0.0f, 0.0f, 1.0f); // Blue
glVertex3f(-1.0f, -1.0f, -1.0f);
// Left
glColor3f(1.0f, 0.0f, 0.0f); // Red
glVertex3f(0.0f, 1.0f, 0.0f);
glColor3f(0.0f, 0.0f, 1.0f); // Blue
glVertex3f(-1.0f, -1.0f, -1.0f);
glColor3f(0.0f, 1.0f, 0.0f); // Green
glVertex3f(-1.0f, -1.0f, 1.0f);
glEnd(); // Done drawing the pyramid
}
void Spotlight()
{
glEnable(GL_LIGHTING);
glLightf(GL_LIGHT0, GL_SPOT_CUTOFF, 15.f);
glLightModelf(GL_LIGHT_MODEL_AMBIENT, 0.2f);
GLfloat light0Pos[] = { -3,-3,10,1 };
glLightfv(GL_LIGHT0, GL_POSITION, light0Pos);
GLfloat light0Diffuse[] = { 1,1,1 };
glLightfv(GL_LIGHT0, GL_DIFFUSE, light0Diffuse);
GLfloat light0Specular[] = { 1,1,1 };
glLightfv(GL_LIGHT0, GL_SPECULAR, light0Specular);
glEnable(GL_LIGHT0);
//glDisable(GL_LIGHTING);
}
void display2()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
Spotlight();
glTranslatef(-0.5f, 0.0f, -6.0f);
glRotatef(angleShape, 1.0f, 1.0f, 0.0f);
CreateShape();
angleShape -= 5.f;
glLoadIdentity();
glTranslatef(2.0f, 2.5f, -7.0f);
glBegin(GL_TRIANGLES);
glColor3f(1.0f, 1.0f, 0.5f);
glVertex3f(0.5f, -3.0f, -5.0f);
glVertex3f(-7.0f, -6.0f, -5.0f);
glVertex3f(1.0f, -6.0f, -5.0f);
glEnd();
glBegin(GL_TRIANGLES);
glVertex3f(-6.5f, -3.0f, -5.0f);
glVertex3f(0.5f, -3.0f, -5.0f);
glVertex3f(-7.0f, -6.0f, -5.0f);
glEnd();
glBegin(GL_TRIANGLES);
glVertex3f(-6.5f, -3.0f, -5.0f);
glVertex3f(0.5f, -3.0f, -5.0f);
glVertex3f(0.5f, 2.0f, -5.0f);
glEnd();
glBegin(GL_TRIANGLES);
glVertex3f(-6.5f, -3.0f, -5.0f);
glVertex3f(-6.5f, 2.0f, -5.0f);
glVertex3f(0.5f, 2.0f, -5.0f);
glEnd();
glutSwapBuffers();
}
void initGL() {
glClearColor(0.0, 0.7, 1.0, 1.0);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glShadeModel(GL_SMOOTH);
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
}
void reshape(GLsizei width, GLsizei height) {
if (height == 0) height = 1;
GLfloat aspect = (GLfloat)width / (GLfloat)height;
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0f, aspect, 0.1f, 100.0f);
}
int main(int argc, char** argv) {
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE);
glutInitWindowPosition(50, 50);
glutInitWindowSize(640, 480);
glutCreateWindow("OpenGL #1");
glutDisplayFunc(display2);
glutReshapeFunc(reshape);
initGL();
glutMainLoop();
return 0;
}