Function setCoords

src/traces/funnelarea/plot.js:188–290

(cd)

}

function setCoords(cd) {
    if(!cd.length) return;

    var cd0 = cd[0];
    var trace = cd0.trace;

    var aspectratio = trace.aspectratio;

    var h = trace.baseratio;
    if(h > 0.999) h = 0.999; // TODO: may handle this case separately
    var h2 = Math.pow(h, 2);

    var v1 = cd0.vTotal;
    var v0 = v1 * h2 / (1 - h2);

    var totalValues = v1;
    var sumSteps = v0 / v1;

    function calcPos() {
        var q = Math.sqrt(sumSteps);
        return {
            x: q,
            y: -q
        };
    }

    function getPoint() {
        var pos = calcPos();
        return [pos.x, pos.y];
    }

    var p;
    var allPoints = [];
    allPoints.push(getPoint());

    var i, cdi;
    for(i = cd.length - 1; i > -1; i--) {
        cdi = cd[i];
        if(cdi.hidden) continue;

        var step = cdi.v / totalValues;
        sumSteps += step;

        allPoints.push(getPoint());
    }

    var minY = Infinity;
    var maxY = -Infinity;
    for(i = 0; i < allPoints.length; i++) {
        p = allPoints[i];
        minY = Math.min(minY, p[1]);
        maxY = Math.max(maxY, p[1]);
    }

    // center the shape
    for(i = 0; i < allPoints.length; i++) {
        allPoints[i][1] -= (maxY + minY) / 2;
    }