use slightly more light

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@45480 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/opengl/cube/cube.cpp

@@ -165,6 +165,10 @@ TestGLContext::TestGLContext(wxGLCanvas *canvas)
     glEnable(GL_LIGHT0);
     glEnable(GL_TEXTURE_2D);
 
+    // add slightly more light, the default lightning is rather dark
+    GLfloat ambient[] = { 0.5, 0.5, 0.5, 0.5 };
+    glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
+
     // set viewing projection
     glMatrixMode(GL_PROJECTION);
     glLoadIdentity();