opengl : glut - soil, black screen

[Floppy22]

hallo,

i versuche atm mit opengl : glut und soil einige texturen für meine skybox zu laden.
jedoch bekomme i nur einen blackscreen.
das laden der texturen funktioniert schon zu 100%, jedoch wird wie bereits schon gesagt nichts angeziegt ... obwohl i denke das i alles richtig gemacht habe.

vielleicht könnt ihr mir helfen.
hier mein code:

// main.cpp
#include "stdafx.h"

void LoadGLTextures(void);      // load textures
void display_skybox(void);      // display skybox

GLuint      skybox[6];                      // skybox sites

// display for rendering
void display (void) {
    keyOperations();                    // key operations

    glClear(GL_COLOR_BUFFER_BIT);       // clear color buffer
    glLoadIdentity();                   // load identity

    glEnable(GL_TEXTURE_2D);            // enable texturing
    display_skybox();                   // display skybox

    glutSwapBuffers();                  // swap buffer
}

// main
int main (int argc, char **argv) {
    glutInit(&argc, argv);                  // initialise glut
    glutInitDisplayMode (GLUT_DOUBLE);      // double buffering
    glutInitWindowSize (1440, 900);         // set width and height
    glutInitWindowPosition (50, 50);        // set position
    glutCreateWindow ("projekt 10");        // set title

    glutDisplayFunc(display);               // display for rendering
    glutIdleFunc(display);                  // display as idle method

    LoadGLTextures();                       // laod textures

    glutMainLoop();                         // enter main loop
}

// laod textures
void LoadGLTextures(void) {
    skybox[0] = SOIL_load_OGL_texture                                           // skybox front
        (
        "Neuer Ordner/skybox_front.png",
        SOIL_LOAD_AUTO,
        SOIL_CREATE_NEW_ID,
        SOIL_FLAG_INVERT_Y
        );
    glBindTexture(GL_TEXTURE_2D, skybox[0]);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);        // clamp edges
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

    skybox[1] = SOIL_load_OGL_texture                                           // skybox right
        (
        "Neuer Ordner/skybox_right.png",
        SOIL_LOAD_AUTO,
        SOIL_CREATE_NEW_ID,
        SOIL_FLAG_INVERT_Y
        );
    glBindTexture(GL_TEXTURE_2D, skybox[1]);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);        // clamp edges
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

    skybox[2] = SOIL_load_OGL_texture                                           // skybox left
        (
        "Neuer Ordner/skybox_left.png",
        SOIL_LOAD_AUTO,
        SOIL_CREATE_NEW_ID,
        SOIL_FLAG_INVERT_Y
        );
    glBindTexture(GL_TEXTURE_2D, skybox[2]);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);        // clamp edges
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

    skybox[3] = SOIL_load_OGL_texture                                           // skybox back
        (
        "Neuer Ordner/skybox_back.png",
        SOIL_LOAD_AUTO,
        SOIL_CREATE_NEW_ID,
        SOIL_FLAG_INVERT_Y
        );
    glBindTexture(GL_TEXTURE_2D, skybox[3]);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);        // clamp edges
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
}

// display skybox
void display_skybox(void) {
    glDisable(GL_DEPTH_TEST);
    glBindTexture(GL_TEXTURE_2D, skybox[0]);                        // skybox front
    glBegin(GL_QUADS);
        glTexCoord2f(0, 0); glVertex3f( 0.5f, -0.5f, -0.5f);
        glTexCoord2f(1, 0); glVertex3f(-0.5f, -0.5f, -0.5f);
        glTexCoord2f(1, 1); glVertex3f(-0.5f,  0.5f, -0.5f);
        glTexCoord2f(0, 1); glVertex3f( 0.5f,  0.5f, -0.5f);
    glEnd();
    glBindTexture(GL_TEXTURE_2D, skybox[2]);                        // skybox left
    glBegin(GL_QUADS);
        glTexCoord2f(0, 0); glVertex3f( 0.5f, -0.5f,  0.5f);
        glTexCoord2f(1, 0); glVertex3f( 0.5f, -0.5f, -0.5f);
        glTexCoord2f(1, 1); glVertex3f( 0.5f,  0.5f, -0.5f);
        glTexCoord2f(0, 1); glVertex3f( 0.5f,  0.5f,  0.5f);
    glEnd();
    glBindTexture(GL_TEXTURE_2D, skybox[3]);                        // skybox back
    glBegin(GL_QUADS);
        glTexCoord2f(0, 0); glVertex3f(-0.5f, -0.5f,  0.5f);
        glTexCoord2f(1, 0); glVertex3f( 0.5f, -0.5f,  0.5f);
        glTexCoord2f(1, 1); glVertex3f( 0.5f,  0.5f,  0.5f);
        glTexCoord2f(0, 1); glVertex3f(-0.5f,  0.5f,  0.5f);
    glEnd();
    glBindTexture(GL_TEXTURE_2D, skybox[1]);                        // skybox right
    glBegin(GL_QUADS);
        glTexCoord2f(0, 0); glVertex3f(-0.5f, -0.5f, -0.5f);
        glTexCoord2f(1, 0); glVertex3f(-0.5f, -0.5f,  0.5f);
        glTexCoord2f(1, 1); glVertex3f(-0.5f,  0.5f,  0.5f);
        glTexCoord2f(0, 1); glVertex3f(-0.5f,  0.5f, -0.5f);
    glEnd();
                                                                    // skybox top
                                                                    // skybox bottom
    glEnable(GL_DEPTH_TEST);
}

gruß und danke für eure hilfe.

[Floppy22]

i denke, i habe nun den primären fehler gefunden.
für alle die, die es interessiert, i hatte vergessen
den GL_DEPTH_BUFFER_BIT mit zu clearen, siehe void display(void).

edit: + GLUT_DEPTH