Function pointToDensityGridData

docs/tests/v2/es6/js/sanddance.js:61768–61844

(_ref)

var DEFAULT_WEIGHT = [1, 0, 0]; // Takes data and aggregation params and returns aggregated data.

function pointToDensityGridData(_ref) {
  var data = _ref.data,
      getPosition = _ref.getPosition,
      cellSizeMeters = _ref.cellSizeMeters,
      gpuGridAggregator = _ref.gpuGridAggregator,
      gpuAggregation = _ref.gpuAggregation,
      aggregationFlags = _ref.aggregationFlags,
      getWeight = _ref.getWeight,
      _ref$fp = _ref.fp64,
      fp64 = _ref$fp === void 0 ? false : _ref$fp,
      _ref$coordinateSystem = _ref.coordinateSystem,
      coordinateSystem = _ref$coordinateSystem === void 0 ? _constants.COORDINATE_SYSTEM.LNGLAT : _ref$coordinateSystem,
      _ref$viewport = _ref.viewport,
      viewport = _ref$viewport === void 0 ? null : _ref$viewport,
      _ref$boundingBox = _ref.boundingBox,
      boundingBox = _ref$boundingBox === void 0 ? null : _ref$boundingBox;
  var gridData = {};
  (0, _assert.default)(aggregationFlags.dataChanged || aggregationFlags.cellSizeChanged || aggregationFlags.viewportChanged);

  if (aggregationFlags.dataChanged) {
    gridData = parseGridData(data, getPosition, getWeight);
    boundingBox = gridData.boundingBox;
  }

  var cellSize = [cellSizeMeters, cellSizeMeters];
  var worldOrigin = [0, 0];
  (0, _assert.default)(coordinateSystem === _constants.COORDINATE_SYSTEM.LNGLAT || coordinateSystem === _constants.COORDINATE_SYSTEM.IDENTITY);

  switch (coordinateSystem) {
    case _constants.COORDINATE_SYSTEM.LNGLAT:
    case _constants.COORDINATE_SYSTEM.LNGLAT_DEPRECATED:
      var gridOffset = getGridOffset(boundingBox, cellSizeMeters);
      cellSize = [gridOffset.xOffset, gridOffset.yOffset];
      worldOrigin = [-180, -90]; // Origin used to define grid cell boundaries

      break;

    case _constants.COORDINATE_SYSTEM.IDENTITY:
      var width = viewport.width,
          height = viewport.height;
      worldOrigin = [-width / 2, -height / 2]; // Origin used to define grid cell boundaries

      break;

    default:
      // Currently other coodinate systems not supported/verified.
      (0, _assert.default)(false);
  }

  var opts = getGPUAggregationParams({
    boundingBox: boundingBox,
    cellSize: cellSize,
    worldOrigin: worldOrigin
  });
  var aggregatedData = gpuGridAggregator.run({
    positions: gridData.positions,
    positions64xyLow: gridData.positions64xyLow,
    weights: gridData.weights,