Subclass
AbstractGLScene and implement the constructor to match the one from AbstractGLScene. Add a method to store a QImage object in the scene that will contain texture data for the cube. Add a QOpenGLTexture pointer member as well, which will contain the texture, initialize it to 0 in the constructor, and delete it in the destructor. Let's call the image object m_tex and the texture m_texture. Now add a protected initializeTexture() method and fill it with the following code:
void initializeTexture() {
m_texture = new QOpenGLTexture(m_tex.mirrored());
m_texture->setMinificationFilter(QOpenGLTexture::LinearMipMapLinear);
m_texture->setMagnificationFilter(QOpenGLTexture::Linear);
}The function first mirrors the image vertically. This is because OpenGL expects the texture to be "upside down". Then we create a QOpenGLTexture object, passing it our image. Then we set minification and magnification filters so that the texture looks better...