Function annaxscale

test/jasmine/assets/domain_ref_components.js:216–220

(ac, c0)

// This also works with log axes by taking logs of each part of the sum, so that
// the length in pixels is multiplied by the scalar
function annaxscale(ac, c0) {
    var ret;
    ret = c0 + 2 * (ac - c0);
    return ret;
}

// This tests to see that an annotation was drawn correctly.
// Determining the length of the arrow seems complicated due to the