Function convert

src/traces/cone/convert.js:52–113

(scene, trace)

var anchor2coneSpan = {tip: 1, tail: 1, cm: 0.75, center: 0.5};

function convert(scene, trace) {
    var sceneLayout = scene.fullSceneLayout;
    var dataScale = scene.dataScale;
    var coneOpts = {};

    function toDataCoords(arr, axisName) {
        var ax = sceneLayout[axisName];
        var scale = dataScale[axisName2scaleIndex[axisName]];
        return simpleMap(arr, function(v) { return ax.d2l(v) * scale; });
    }

    coneOpts.vectors = zip3(
        toDataCoords(trace.u, 'xaxis'),
        toDataCoords(trace.v, 'yaxis'),
        toDataCoords(trace.w, 'zaxis'),
        trace._len
    );

    coneOpts.positions = zip3(
        toDataCoords(trace.x, 'xaxis'),
        toDataCoords(trace.y, 'yaxis'),
        toDataCoords(trace.z, 'zaxis'),
        trace._len
    );

    var cOpts = extractOpts(trace);
    coneOpts.colormap = parseColorScale(trace);
    coneOpts.vertexIntensityBounds = [cOpts.min / trace._normMax, cOpts.max / trace._normMax];
    coneOpts.coneOffset = anchor2coneOffset[trace.anchor];


    var sizemode = trace.sizemode;
    if(sizemode === 'scaled') {
        // unitless sizeref
        coneOpts.coneSize = trace.sizeref || 0.5;
    } else if(sizemode === 'absolute') {
        // sizeref here has unit of velocity
        coneOpts.coneSize = trace.sizeref && trace._normMax ?
            trace.sizeref / trace._normMax :
            0.5;
    } else if(sizemode === 'raw') {
        coneOpts.coneSize = trace.sizeref;
    }
    coneOpts.coneSizemode = sizemode;

    var meshData = conePlot(coneOpts);

    // pass gl-mesh3d lighting attributes
    var lp = trace.lightposition;
    meshData.lightPosition = [lp.x, lp.y, lp.z];
    meshData.ambient = trace.lighting.ambient;
    meshData.diffuse = trace.lighting.diffuse;
    meshData.specular = trace.lighting.specular;
    meshData.roughness = trace.lighting.roughness;
    meshData.fresnel = trace.lighting.fresnel;
    meshData.opacity = trace.opacity;

    // stash autorange pad value