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Normally, you'd use something like:
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
glEnable(GL_LINE_SMOOTH);
glLineWidth(2.0f);
glVertexPointer(2, GL_FLOAT, 0, points);
glEnableClientState(GL_VERTEX_ARRAY);
glDrawArrays(GL_LINE_STRIP, 0, num_points);
glDisableClientState(GL_VERTEX_ARRAY);
It looks good in the iPhone simulator, but on the iPhone the lines get extremely thin and w/o any anti aliasing.
How do you get AA on iPhone?