ZBuffer não funciona

//Header
#include "GameSteps.h"

class MainGameSteps : public GameSteps
{
    public:
        explicit MainGameSteps();

        virtual void setup();

        virtual void processEvents(const SDL_Event& event);
        virtual void processLogics();
        virtual void draw() const;

        virtual bool ended();

        virtual void teardown();
    private:
        float degreesToRotateX;
        float degreesToRotateY;
        float degreesToRotateZ;

        float camX, camY, camZ;
        bool exit;
};

//Source

//setup. Eu até checo se o zbuffer tá habilitado e ele sempre passa daqui
void MainGameSteps::setup()
{
    degreesToRotateX = degreesToRotateY = degreesToRotateZ = 0;
    camX = camY = 0;
    camZ = 5;
    glEnable(GL_BLEND);
    glEnable(GL_CULL_FACE);
    glEnable(GL_DEPTH_TEST);
    glEnable(GL_POLYGON_SMOOTH);
//  glDepthFunc(GL_LESS);
    glDepthRange(100,-100);
    glCullFace(GL_BACK);
    if(!glIsEnabled(GL_DEPTH_TEST))
        std::exit(-1);
}

//draw
void MainGameSteps::draw() const
{
    glMatrixMode(GL_PROJECTION);
       glLoadIdentity();  //Resetamos a projeção atual
       gluPerspective(60, GAMEWINDOW.getRatio(), 1, 15000);
    glMatrixMode(GL_MODELVIEW);
    glPushMatrix();
        //Limpa a tela
        gluLookAt(camX, camY, camZ, 0, 0, 0, 0, 1, 0);
        glClearColor(0.0, 0.0, 0.0, 0.0);
//        glClearDepth(1.0); // Tentei com valor de 1, de 0 e sem essa função
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

        //Sun
        glColor3f(1, 1, .8f);
        drawCube();
        glPushMatrix();
            //Planet
//          glRotatef(degreesToRotateY, 0,1,0); // Achei q era aqui mas mesmo desabilitando ela ainda ainda mostra errado
            glColor3f(0, .2, .8f);
            glTranslatef(0, 0, -2);// Tentei tbm com z positivo, Sem sucesso
            glScalef(.4f, .4f, .4f);
            glRotatef(degreesToRotateY*2, 0,1,0);
            drawCube();
        glPopMatrix();
    glPopMatrix();
}