纹理绑定不起作用 / C++ / OpenGL

我正试图为我的项目创建一个纹理类，该类初始化并加载图像中的纹理。纹理加载良好，但每当我想通过调用GetTexture()函数从类外获取纹理ID时，glIsTexture(()不再将返回值(纹理ID)视为纹理。而我想要纹理化的脸保持空白。

此外，我尝试使用函数texture:：SetActive()直接从texture类本身使用glBindTexture()绑定纹理，但仍然不起作用。

最后，当我直接从函数返回纹理ID时，纹理会正确显示。

我这里缺什么了吗？我真的不知道在这一点上该找什么。

提前感谢您的帮助！

这是我的纹理类：

// Constructor
Texture::Texture(std::string const& texPath) {
SDL_Surface *texture = nullptr, *newFormatTexture = nullptr, *flippedTexture = nullptr;
SDL_PixelFormat tmpFormat;
Uint32 amask, rmask, gmask, bmask;
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
rmask = 0xFF000000;
gmask = 0x00FF0000;
bmask = 0x0000FF00;
amask = 0x000000FF;
#else
rmask = 0x000000FF;
gmask = 0x0000FF00;
bmask = 0x00FF0000;
amask = 0xFF000000;
#endif
if ((texture = IMG_Load(texPath.c_str())) == nullptr) {
std::cerr << "[ERROR] : Could not load texture " << texPath << ". Skipping..." << std::endl;
}
tmpFormat = *(texture->format);
tmpFormat.BitsPerPixel = 32;
tmpFormat.BytesPerPixel = 4;
tmpFormat.Rmask = rmask;
tmpFormat.Gmask = gmask;
tmpFormat.Bmask = bmask;
tmpFormat.Amask = amask;
if ((newFormatTexture = SDL_ConvertSurface(texture, &tmpFormat, SDL_SWSURFACE)) == nullptr)  {
std::cerr << "[ERROR] : Couldn't convert surface to given format." << std::endl;
}
if ((flippedTexture = this->FlipSurface(newFormatTexture)) == nullptr) {
std::cerr << "[ERROR] : Couldn't flip surface." << std::endl;
}
glGenTextures(1, &(this->_textureID));
glBindTexture(GL_TEXTURE_2D, this->_textureID);
glTexImage2D(GL_TEXTURE_2D, 0, 4, flippedTexture->w, flippedTexture->h, 0, GL_RGBA, GL_UNSIGNED_BYTE, flippedTexture->pixels);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glBindTexture(GL_TEXTURE_2D, 0);
SDL_FreeSurface(flippedTexture);
SDL_FreeSurface(newFormatTexture);
SDL_FreeSurface(texture);
}
Texture::Texture(unsigned char *texData, int width, int height) {
glGenTextures(1, &(this->_textureID));
glBindTexture(GL_TEXTURE_2D, this->_textureID);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, texData);
glBindTexture(GL_TEXTURE_2D, 0);
}
Texture::~Texture() {
glDeleteTextures(1, &(this->_textureID));
}
Texture Texture::CreateTexture(std::string const& texPath) {
Texture tex(texPath);
return (tex);
}
Texture Texture::CreateTexture(unsigned char *texData, int width, int height) {
Texture tex(texData, width, height);
return (tex);
}
unsigned int Texture::GetTexture() const {
return (this->_textureID);
}
void Texture::SetActive() {
glBindTexture(GL_TEXTURE_2D, this->_textureID);
}

我加载和使用纹理的主要类：

int WinMain(void) {
Window window("Hello", 640, 480);
double angleX, angleZ;
Texture tex;
int height;
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(70, (double)640/480, 1, 1000);
glEnable(GL_TEXTURE_2D);
glEnable(GL_DEPTH_TEST);
tex = Texture::CreateTexture("caisse.jpg");
while (!window.Quit()) {
Input::Update();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt(3,4,2,0,0,0,0,0,1);
tex.SetActive();
glBegin(GL_QUADS);
glTexCoord2d(0, 1);
glVertex3d(1, 1, 1);
glTexCoord2d(0, 0);
glVertex3d(1, 1, -1);
glTexCoord2d(1, 0);
glVertex3d(-1, 1, -1);
glTexCoord2d(1, 1);
glVertex3d(-1, 1, 1);
glEnd();
glFlush();
window.RefreshDisplay();
}
return (0);
}

编辑

我解决了我的问题。如本主题所述：OpenGL纹理未显示的常见故障排除步骤是什么，纹理的初始化不能在构造函数中完成。

感谢您的帮助：)