CODEWITHSUNDEEP
c++glut
user3480594
user3480594

Reputation:

Problems with GLUT callback functions

Hei,

I am trying to create a scene with OpenGL and CUDA using C++ but i receive an error when i try to pass the function for initialization. Here is my header : 

class SimpleScene
{
public:

    SimpleScene();
    ~SimpleScene();
    void computeFPS();
    void render();
    void display();
    void idle();
    void keyboard(unsigned char key, int x, int y);
    void reshape(int x, int y);
    void cleanup();
    void initGLBuffers();
    uchar *loadRawFile(const char *filename, size_t size);
    void initGL(int *argc, char **argv);
    int chooseCudaDevice(int argc, char **argv, bool bUseOpenGL);
    void runAutoTest(const char *ref_file, char *exec_path);
    void loadVolumeData(char *exec_path);
};

And in my .cpp file i have something like this and this generete same errors: 

void SimpleScene::initGL(int * argc, char ** argv)
{
SimpleScene* obj = new SimpleScene;
// initialize GLUT callback functions
glutInit(argc, argv);
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
glutInitWindowSize(width, height);
glutCreateWindow("CUDA 3D texture");
glutDisplayFunc(obj->display);
glutKeyboardFunc(obj->keyboard);
glutReshapeFunc(obj->reshape);
glutIdleFunc(obj->idle);

if (!isGLVersionSupported(2, 0) || !areGLExtensionsSupported("GL_ARB_pixel_buffer_object"))
    {
    fprintf(stderr, "Required OpenGL extensions are missing.");
    exit(EXIT_FAILURE);
    }
}

The problems are in the display,idle,keybord and reshape. The errors reported are like this:

Error   C3867   'SimpleScene::display': non-standard syntax; use '&' to create a pointer to member  
Error   C3867   'SimpleScene::idle': non-standard syntax; use '&' to create a pointer to member     
Error   C3867   'SimpleScene::keyboard': non-standard syntax; use '&' to create a pointer to member 
Error   C3867   'SimpleScene::reshape': non-standard syntax; use '&' to create a pointer to member

Upvotes: 1

Views: 446

Answers (2)

Xiangyang He
Xiangyang He

Reputation: 3

You should program like this:

  • glutDisplayFunc(this->display)

rather than

  • glutDisplayFunc(obj->display)

Upvotes: 0

Ahmed Wael
Ahmed Wael

Reputation: 103

From experience I can tell you glut works really bad with OOP architecture there is an answer on another question that can help about c++ pointers this is the link to it How to make a pointer to a method in class.

Upvotes: 1

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