Function pickObject

docs/tests/v2/es6/js/sanddance.js:45389–45485

(gl, _ref)

// Pick the closest object at the given (x,y) coordinate

function pickObject(gl, _ref) {
  var layers = _ref.layers,
      viewports = _ref.viewports,
      x = _ref.x,
      y = _ref.y,
      radius = _ref.radius,
      layerFilter = _ref.layerFilter,
      _ref$depth = _ref.depth,
      depth = _ref$depth === void 0 ? 1 : _ref$depth,
      mode = _ref.mode,
      onViewportActive = _ref.onViewportActive,
      pickingFBO = _ref.pickingFBO,
      lastPickedInfo = _ref.lastPickedInfo,
      useDevicePixels = _ref.useDevicePixels; // Convert from canvas top-left to WebGL bottom-left coordinates
  // And compensate for pixelRatio

  var pixelRatio = (0, _drawLayers.getPixelRatio)({
    useDevicePixels: useDevicePixels
  });
  var deviceX = Math.round(x * pixelRatio);
  var deviceY = Math.round(gl.canvas.height - y * pixelRatio);
  var deviceRadius = Math.round(radius * pixelRatio);
  var deviceRect = getPickingRect({
    deviceX: deviceX,
    deviceY: deviceY,
    deviceRadius: deviceRadius,
    deviceWidth: pickingFBO.width,
    deviceHeight: pickingFBO.height
  });
  var result = [];
  var affectedLayers = {};

  for (var i = 0; i < depth; i++) {
    var pickedColors = deviceRect && drawAndSamplePickingBuffer(gl, {
      layers: layers,
      viewports: viewports,
      onViewportActive: onViewportActive,
      useDevicePixels: useDevicePixels,
      pickingFBO: pickingFBO,
      deviceRect: deviceRect,
      layerFilter: layerFilter,
      redrawReason: mode
    });
    var pickInfo = pickedColors && getClosestFromPickingBuffer(gl, {
      pickedColors: pickedColors,
      layers: layers,
      deviceX: deviceX,
      deviceY: deviceY,
      deviceRadius: deviceRadius,
      deviceRect: deviceRect
    }) || NO_PICKED_OBJECT; // Only exclude if we need to run picking again.
    // We need to run picking again if an object is detected AND
    // we have not exhausted the requested depth.

    if (pickInfo.pickedColor && i + 1 < depth) {
      var layerId = pickInfo.pickedColor[3] - 1;

      if (!affectedLayers[layerId]) {