Box.create constructor

Box.create({ required double minX, required double minY, double? minZ, double? minM, required double maxX, required double maxY, double? maxZ, double? maxM, })

A bounding box from parameters compatible with CreateBox function type.

The Box.view constructor is used to create a bounding box from a double array filled by given minX, minY, maxX and maxY coordinate values (and optionally by minZ, minM, maxZ and maxM too).

Examples:

// a 2D box
Box.create(minX: 10.0, minY: 20.0, maxX: 15.0, maxY: 25.0);

// a 3D box
Box.create(
  minX: 10.0, minY: 20.0, minZ: 30.0,
  maxX: 15.0, maxY: 25.0, maxZ: 35.0,
);

// a measured 2D box
Box.create(
  minX: 10.0, minY: 20.0, minM: 40.0,
  maxX: 15.0, maxY: 25.0, maxM: 45.0,
);

// a measured 3D box
Box.create(
  minX: 10.0, minY: 20.0, minZ: 30.0, minM: 40.0,
  maxX: 15.0, maxY: 25.0, maxZ: 35.0, maxM: 45.0,
);

Implementation

factory Box.create({
  required double minX,
  required double minY,
  double? minZ,
  double? minM,
  required double maxX,
  required double maxY,
  double? maxZ,
  double? maxM,
}) {
  final is3D = minZ != null && maxZ != null;
  final isMeasured = minM != null && maxM != null;
  final type = Coords.select(is3D: is3D, isMeasured: isMeasured);
  final list = Float64List(2 * type.coordinateDimension);
  var i = 0;
  list[i++] = minX;
  list[i++] = minY;
  if (is3D) {
    list[i++] = minZ;
  }
  if (isMeasured) {
    list[i++] = minM;
  }
  list[i++] = maxX;
  list[i++] = maxY;
  if (is3D) {
    list[i++] = maxZ;
  }
  if (isMeasured) {
    list[i++] = maxM;
  }
  return Box.view(list, type: type);
}