Z-Buffer Quebrado parte 2

#include "MainGameSteps.h"
#include "SDL.h"
#include "SDL_opengl.h"
#include "GameWindow.h"
#include <cmath>
#include <iostream>
#include <cstdlib>
using namespace std;


MainGameSteps::MainGameSteps() : exit(false) {}

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_ALWAYS);
    glDepthRange(100,-100);
    glCullFace(GL_BACK);
    if(!glIsEnabled(GL_DEPTH_TEST))
        std::exit(-1);
}

void MainGameSteps::processEvents(const SDL_Event& event)
{
    switch (event.type)
    {
    case SDL_QUIT:
        exit = true;
        break;
    case SDL_KEYDOWN:
        switch (event.key.keysym.sym)
        {
        case SDLK_F4:
            if (event.key.keysym.sym == SDLK_F4
                    && (event.key.keysym.mod & KMOD_ALT))
                exit = true;
            break;
        case SDLK_SPACE:
            degreesToRotateX = degreesToRotateY = degreesToRotateZ = 0;
            break;
        case SDLK_1:
            glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
            break;
        case SDLK_2:
            glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
            break;
        case SDLK_3:
            glPolygonMode(GL_FRONT_AND_BACK, GL_POINT);
            break;
        default:
            break;
        }
        break;
    }
}

void MainGameSteps::processLogics()
{
    //Distância para girar (em graus) =
    //velocidade (0.180f) * tempo (ticks)
    float distance = 0.180f * GAMEWINDOW.getTicks();
    degreesToRotateY += distance;
}

#define CUBE_SIZE_2 .5

static void drawCube()
{
    glBegin(GL_TRIANGLES);
        //Frente
        glVertex3f(CUBE_SIZE_2, CUBE_SIZE_2, CUBE_SIZE_2);
        glVertex3f(-CUBE_SIZE_2, CUBE_SIZE_2, CUBE_SIZE_2);
        glVertex3f(-CUBE_SIZE_2, -CUBE_SIZE_2, CUBE_SIZE_2);
        glVertex3f(-CUBE_SIZE_2, -CUBE_SIZE_2, CUBE_SIZE_2);
        glVertex3f(CUBE_SIZE_2, -CUBE_SIZE_2, CUBE_SIZE_2);
        glVertex3f(CUBE_SIZE_2, CUBE_SIZE_2, CUBE_SIZE_2);

        //Verso
        glVertex3f(CUBE_SIZE_2, CUBE_SIZE_2, -CUBE_SIZE_2);
        glVertex3f(CUBE_SIZE_2, -CUBE_SIZE_2, -CUBE_SIZE_2);
        glVertex3f(-CUBE_SIZE_2, -CUBE_SIZE_2, -CUBE_SIZE_2);
        glVertex3f(-CUBE_SIZE_2, -CUBE_SIZE_2, -CUBE_SIZE_2);
        glVertex3f(-CUBE_SIZE_2, CUBE_SIZE_2, -CUBE_SIZE_2);
        glVertex3f(CUBE_SIZE_2, CUBE_SIZE_2, -CUBE_SIZE_2);

//          //Direita
        glVertex3f(CUBE_SIZE_2, CUBE_SIZE_2, CUBE_SIZE_2);
        glVertex3f(CUBE_SIZE_2, -CUBE_SIZE_2, CUBE_SIZE_2);
        glVertex3f(CUBE_SIZE_2, -CUBE_SIZE_2, -CUBE_SIZE_2);
        glVertex3f(CUBE_SIZE_2, -CUBE_SIZE_2, -CUBE_SIZE_2);
        glVertex3f(CUBE_SIZE_2, CUBE_SIZE_2, -CUBE_SIZE_2);
        glVertex3f(CUBE_SIZE_2, CUBE_SIZE_2, CUBE_SIZE_2);

//          //Esquerda
        glVertex3f(-CUBE_SIZE_2, -CUBE_SIZE_2, -CUBE_SIZE_2);
        glVertex3f(-CUBE_SIZE_2, -CUBE_SIZE_2, CUBE_SIZE_2);
        glVertex3f(-CUBE_SIZE_2, CUBE_SIZE_2, CUBE_SIZE_2);
        glVertex3f(-CUBE_SIZE_2, CUBE_SIZE_2, CUBE_SIZE_2);
        glVertex3f(-CUBE_SIZE_2, CUBE_SIZE_2, -CUBE_SIZE_2);
        glVertex3f(-CUBE_SIZE_2, -CUBE_SIZE_2, -CUBE_SIZE_2);

//          //Baixo
        glVertex3f(-CUBE_SIZE_2, -CUBE_SIZE_2, -CUBE_SIZE_2);
        glVertex3f(CUBE_SIZE_2, -CUBE_SIZE_2, -CUBE_SIZE_2);
        glVertex3f(CUBE_SIZE_2, -CUBE_SIZE_2, CUBE_SIZE_2);
        glVertex3f(CUBE_SIZE_2, -CUBE_SIZE_2, CUBE_SIZE_2);
        glVertex3f(-CUBE_SIZE_2, -CUBE_SIZE_2, CUBE_SIZE_2);
        glVertex3f(-CUBE_SIZE_2, -CUBE_SIZE_2, -CUBE_SIZE_2);

//          //Abaixo
        glVertex3f(CUBE_SIZE_2, CUBE_SIZE_2, CUBE_SIZE_2);
        glVertex3f(CUBE_SIZE_2, CUBE_SIZE_2, -CUBE_SIZE_2);
        glVertex3f(-CUBE_SIZE_2, CUBE_SIZE_2, -CUBE_SIZE_2);
        glVertex3f(-CUBE_SIZE_2, CUBE_SIZE_2, -CUBE_SIZE_2);
        glVertex3f(-CUBE_SIZE_2, CUBE_SIZE_2, CUBE_SIZE_2);
        glVertex3f(CUBE_SIZE_2, CUBE_SIZE_2, CUBE_SIZE_2);

    glEnd();
}

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);
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
//        glTranslatef(0,0, -250);

//        //Gira o triângulo
//        glRotatef(degreesToRotateZ, 0,0,1);
//        glRotatef(degreesToRotateX, 1,0,0);
//        glRotatef(degreesToRotateY, 0,1,0);

        //Sun
        glColor3f(1, 1, .8f);
        drawCube();
        glPushMatrix();
            //Planet
            glRotatef(degreesToRotateY, 0,1,0);
            glColor3f(0, .2, .8f);
            glTranslatef(0, 0, -4);
            glScalef(.4f, .4f, .4f);
            glRotatef(degreesToRotateY*2, 0,1,0);
            drawCube();
        glPopMatrix();
    glPopMatrix();
}

bool MainGameSteps::ended()
{
    return exit;
}

void MainGameSteps::teardown() {}