
shader test(float g = 0,
            float f = 1 [[ int interactive = 1 ]],
            float user = 2 [[ int interpolated = 1 ]],
            float third = 3 [[ int interpolated = 1 ]],
            output color Cout = 0
            )
{
    printf("test: f = %g\n", f);
    printf("test: user = %g\n", user);
    printf("test: third = %g\n", third);
    Cout = f + user + third;
}
