Question

I have this function that says when I press a I switch between GL_LINE and GL_FILL. when I run the program it starts with GL_FILL and when I press a it switches to GL_LINE. However I want it to keep switching between the both when a is pressed.

can someone tell me where I am going wrong.

void keyPressed (unsigned char key, int x, int y) { 
switch (key){
case 'a':
    bool f = false;
    if(!f){
        glPolygonMode(GL_FRONT,GL_LINE);
        glPolygonMode(GL_BACK, GL_LINE);

    }else{
        //bOutline=false;
        glPolygonMode(GL_FRONT,GL_FILL);
        glPolygonMode(GL_BACK, GL_FILL);
    }
    f=!f;
    break;

}

}

Answer 1

i think you must switch between 2 state that is handled by f , so you need to define f in outer scope or define it as static variable like this

static bool f = false;