Function getGPUAggregationParams

docs/tests/v2/es6/js/sanddance.js:62005–62033

(_ref2)

function getGPUAggregationParams(_ref2) {
  var boundingBox = _ref2.boundingBox,
      cellSize = _ref2.cellSize,
      worldOrigin = _ref2.worldOrigin;
  var yMin = boundingBox.yMin,
      yMax = boundingBox.yMax,
      xMin = boundingBox.xMin,
      xMax = boundingBox.xMax; // NOTE: this alignment will match grid cell boundaries with existing CPU implementation
  // this gurantees identical aggregation results when switching between CPU and GPU aggregation.
  // Also gurantees same cell boundaries, when overlapping between two different layers (like ScreenGrid and Contour)
  // We first move worldOrigin to [0, 0], align the lower bounding box , then move worldOrigin to its original value.

  var originX = alignToCell(xMin - worldOrigin[0], cellSize[0]) + worldOrigin[0];
  var originY = alignToCell(yMin - worldOrigin[1], cellSize[1]) + worldOrigin[1]; // Setup transformation matrix so that every point is in +ve range

  var gridTransformMatrix = new _math.Matrix4().translate([-1 * originX, -1 * originY, 0]); // const cellSize = [gridOffset.xOffset, gridOffset.yOffset];

  var gridOrigin = [originX, originY];
  var width = xMax - xMin + cellSize[0];
  var height = yMax - yMin + cellSize[1];
  var gridSize = [Math.ceil(width / cellSize[0]), Math.ceil(height / cellSize[1])];
  return {
    gridOrigin: gridOrigin,
    gridSize: gridSize,
    width: width,
    height: height,
    gridTransformMatrix: gridTransformMatrix
  };
}
},{"../../../utils/assert":"R2tg","math.gl":"o5CE","luma.gl":"iiNl","../../../lib/constants":"hXbg","../../../utils/iterable-utils":"ZNUc","../../../utils/count":"frIP","./gpu-grid-aggregator-constants":"ReP4"}],"P3tH":[function(require,module,exports) {
"use strict";