def _opdist_low(av, bv, cv, deriv):
a = Vector3(<NUM_LIT:9>, deriv, av, (<NUM_LIT:0>, <NUM_LIT:1>, <NUM_LIT:2>))<EOL>b = Vector3(<NUM_LIT:9>, deriv, bv, (<NUM_LIT:3>, <NUM_LIT:4>, <NUM_LIT:5>))<EOL>c = Vector3(<NUM_LIT:9>, deriv, cv, (<NUM_LIT:6>, <NUM_LIT:7>, <NUM_LIT:8>))<EOL>n  = cross(a, b)<EOL>n /= n.norm()<EOL>dist = dot(c, n)<EOL>return dist.results()<EOL>
Similar to opdist, but with relative vectors