Function getSymbolSdf

src/traces/scattergl/convert.js:463–498

(d, trace)

var SYMBOL_SVG_CIRCLE = Drawing.symbolFuncs[0](SYMBOL_SIZE * 0.05);

function getSymbolSdf(d, trace) {
    var symbol = d.mx;
    if (symbol === 'circle') return null;

    var symbolPath, symbolSdf;
    var symbolNumber = Drawing.symbolNumber(symbol);
    var symbolFunc = Drawing.symbolFuncs[symbolNumber % 100];
    var symbolNoDot = !!Drawing.symbolNoDot[symbolNumber % 100];
    var symbolNoFill = !!Drawing.symbolNoFill[symbolNumber % 100];

    var isDot = helpers.isDotSymbol(symbol);

    // until we may handle angles in shader?
    if (d.ma) symbol += '_' + d.ma;

    // get symbol sdf from cache or generate it
    if (SYMBOL_SDF[symbol]) return SYMBOL_SDF[symbol];

    var angle = Drawing.getMarkerAngle(d, trace);
    if (isDot && !symbolNoDot) {
        symbolPath = symbolFunc(SYMBOL_SIZE * 1.1, angle) + SYMBOL_SVG_CIRCLE;
    } else {
        symbolPath = symbolFunc(SYMBOL_SIZE, angle);
    }

    symbolSdf = svgSdf(symbolPath, {
        w: SYMBOL_SDF_SIZE,
        h: SYMBOL_SDF_SIZE,
        viewBox: [-SYMBOL_SIZE, -SYMBOL_SIZE, SYMBOL_SIZE, SYMBOL_SIZE],
        stroke: symbolNoFill ? SYMBOL_STROKE : -SYMBOL_STROKE
    });

    SYMBOL_SDF[symbol] = symbolSdf;

    return symbolSdf || null;
}

function convertLinePositions(gd, trace, positions) {
    var len = positions.length;