Function transformer

docs/app/js/sanddance-app.js:127512–127549

()

    return target.domain(source.domain()).range(source.range()).interpolate(source.interpolate()).clamp(source.clamp()).unknown(source.unknown());
}
function transformer() {
    var domain = unit, range = unit, interpolate = (0, _d3Interpolate.interpolate), transform, untransform, unknown, clamp = identity, piecewise, output, input;
    function rescale() {
        var n = Math.min(domain.length, range.length);
        if (clamp !== identity) clamp = clamper(domain[0], domain[n - 1]);
        piecewise = n > 2 ? polymap : bimap;
        output = input = null;
        return scale;
    }
    function scale(x) {
        return x == null || isNaN(x = +x) ? unknown : (output || (output = piecewise(domain.map(transform), range, interpolate)))(transform(clamp(x)));
    }
    scale.invert = function(y) {
        return clamp(untransform((input || (input = piecewise(range, domain.map(transform), (0, _d3Interpolate.interpolateNumber))))(y)));
    };
    scale.domain = function(_) {
        return arguments.length ? (domain = Array.from(_, (0, _numberJsDefault.default)), rescale()) : domain.slice();
    };
    scale.range = function(_) {
        return arguments.length ? (range = Array.from(_), rescale()) : range.slice();
    };
    scale.rangeRound = function(_) {
        return range = Array.from(_), interpolate = (0, _d3Interpolate.interpolateRound), rescale();
    };
    scale.clamp = function(_) {
        return arguments.length ? (clamp = _ ? true : identity, rescale()) : clamp !== identity;
    };
    scale.interpolate = function(_) {
        return arguments.length ? (interpolate = _, rescale()) : interpolate;
    };
    scale.unknown = function(_) {
        return arguments.length ? (unknown = _, scale) : unknown;
    };
    return function(t, u) {
        transform = t, untransform = u;
        return rescale();
    };
}
function continuous() {
    return transformer()(identity, identity);
}