Does SFML support transparency? - opengl

Question

Hi I am trying to draw a translucent sphere using OpenGL / glut;
Easiest thing I think is to post the code: This is what I have at the moment;
glutInit(&argc, argv);
sf::ContextSettings settings;
settings.depthBits = 32;
settings.stencilBits = 0;
settings.antialiasingLevel = 0;
sf::Window window(sf::VideoMode(800, 600), "insert title", sf::Style::Default, settings);
window.setVerticalSyncEnabled(true);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
glClearColor(0.0,0.0,0.0,0.0);
bool running = true;
while(running)
{
sf::Event e;
while(window.pollEvent(e))
{
if(e.type == sf::Event::Closed)
{
running = false;
}
if(e.type == sf::Event::Resized)
{
glViewport(0, 0, e.size.width, e.size.height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0, (double)e.size.width / (double)e.size.height, 0.1, 2000.0);
gluLookAt(0,0,0, 1,0,0, 0,1,0);
glMatrixMode(GL_MODELVIEW);
}
}
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
glColor4d(1.0, 0.0, 0.0, 0.5);
glutWireSphere(0.5, 4, 4);
window.display();
}
Ran this thing under optirun and without optirun... No transparency though!
I read somewhere the context must have an alpha buffer... Does SFML support this?

Answer 1

Your code is very confused.
FreeGLUT and SFML do the same thing with regard to OpenGL: they create windows with OpenGL contexts. You should not be using them both in the same application.
Also, you can't call OpenGL functions until you've created the window. And those functions will only affect the current context. Those functions will have no effect on the new context you create with SFML. Your code simply doesn't make sense.