Dear Friends
I am using orthographic projection to render my 3d model. As I rotate the geometry the model gets distorted near the edeges at the top. Can u tell me anyone why is it happening. please check my code snippet.

Code:
void CRevolutionProjView::orthogonalStart()
{
	glMatrixMode(GL_PROJECTION);
    glPushMatrix();
    glLoadIdentity();
    glOrtho(left_side*AR, right_side*AR, top_side, bottom_side, near_side, far_side);
	glScalef(zoomFactor,zoomFactor,1);
	glTranslatef(trans[0], trans[1], trans[2]);
	glRotatef(rot[0], 1.0f, 0.0f, 0.0f);
	glRotatef(rot[1], 0.0f, 1.0f, 0.0f);
	glRotatef(rot[2], 0.0f, 0.0f, 1.0f);
    glMatrixMode(GL_MODELVIEW);
}

void CRevolutionProjView::orthogonalEnd()
{
    glMatrixMode(GL_PROJECTION);
    glPopMatrix();
    glMatrixMode(GL_MODELVIEW);
}

void CRevolutionProjView::DrawScene(CDC *pDC)
{
	wglMakeCurrent(pDC->m_hDC, m_hrc);
	//---------------------------------
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	glEnable(GL_DEPTH_TEST);
	orthogonalStart();
	glCallList(axes);
	glCallList(object);
	glPrintX("X");
    glPrintY("Y");
    glPrintZ("Z");
	glFlush();
	orthogonalEnd();
	SwapBuffers(pDC->m_hDC);
	wglMakeCurrent(NULL, NULL);
}

void CRevolutionProjView::Reshape(CDC *pDC, int w, int h)
{
	AR = (double)w/(double)h;
	wd = w;
	ht = h;
	wglMakeCurrent(pDC->m_hDC, m_hrc);
	//---------------------------------
	glViewport (0, 0, (GLsizei) w, (GLsizei) h); 
	glMatrixMode (GL_PROJECTION);
	glLoadIdentity ();
	gluPerspective (45, (GLfloat)w / (GLfloat)h, 0.1, 1000.0);
 	glMatrixMode (GL_MODELVIEW);
	Invalidate();
	wglMakeCurrent(NULL, NULL);
}
Is my projection correct ??