Light Sources

        GLfloat light0_position[] = { 0, 0, 1, 0 };
        GLfloat light0_brightness = { 1, 1, 1, 1 };
        glLightfv(GL_LIGHT0, GL_POSITION, light0_position);
        glLightfv(GL_LIGHT0, GL_DIFFUSE, light0_brightness);
        glLightfv(GL_LIGHT0, GL_SPECULAR, light0_brightness);

• Directional light vs. point light - directional has w = 0
• The light position is transformed by modelview
  • If light position (or direction) is relative to model, specify it after transformations
  • If light position is relative to camera, specify before transformations
• Can set lots of other fancy stuff with glLightfv and glLightModelfv
• Can set up more than 1 light - just repeat with GL_LIGHT1, GL_LIGHT2, etc.