@nebula.gl/layers
Version:
A suite of 3D-enabled data editing layers, suitable for deck.gl
216 lines (168 loc) • 23.2 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.toDeckColor = toDeckColor;
exports.recursivelyTraverseNestedArrays = recursivelyTraverseNestedArrays;
exports.generatePointsParallelToLinePoints = generatePointsParallelToLinePoints;
exports.distance2d = distance2d;
exports.mix = mix;
exports.nearestPointOnProjectedLine = nearestPointOnProjectedLine;
var _destination = _interopRequireDefault(require("@turf/destination"));
var _bearing = _interopRequireDefault(require("@turf/bearing"));
var _pointToLineDistance = _interopRequireDefault(require("@turf/point-to-line-distance"));
var _helpers = require("@turf/helpers");
var _viewportMercatorProject = _interopRequireDefault(require("viewport-mercator-project"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }
function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _iterableToArrayLimit(arr, i) { if (typeof Symbol === "undefined" || !(Symbol.iterator in Object(arr))) return; var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }
function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
function _toConsumableArray(arr) { return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread(); }
function _nonIterableSpread() { throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(n); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
function _iterableToArray(iter) { if (typeof Symbol !== "undefined" && Symbol.iterator in Object(iter)) return Array.from(iter); }
function _arrayWithoutHoles(arr) { if (Array.isArray(arr)) return _arrayLikeToArray(arr); }
function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }
function toDeckColor(color) {
var defaultColor = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [255, 0, 0, 255];
if (!Array.isArray(color)) {
return defaultColor;
}
return [color[0] * 255, color[1] * 255, color[2] * 255, color[3] * 255];
} //
// a GeoJSON helper function that calls the provided function with
// an argument that is the most deeply-nested array having elements
// that are arrays of primitives as an argument, e.g.
//
// {
// "type": "MultiPolygon",
// "coordinates": [
// [
// [[30, 20], [45, 40], [10, 40], [30, 20]]
// ],
// [
// [[15, 5], [40, 10], [10, 20], [5, 10], [15, 5]]
// ]
// ]
// }
//
// the function would be called on:
//
// [[30, 20], [45, 40], [10, 40], [30, 20]]
//
// and
//
// [[15, 5], [40, 10], [10, 20], [5, 10], [15, 5]]
//
function recursivelyTraverseNestedArrays(array, prefix, fn) {
if (!Array.isArray(array[0])) {
return true;
}
for (var i = 0; i < array.length; i++) {
if (recursivelyTraverseNestedArrays(array[i], [].concat(_toConsumableArray(prefix), [i]), fn)) {
fn(array, prefix);
break;
}
}
return false;
}
function generatePointsParallelToLinePoints(p1, p2, groundCoords) {
var lineString = {
type: 'LineString',
coordinates: [p1, p2]
};
var pt = (0, _helpers.point)(groundCoords);
var ddistance = (0, _pointToLineDistance["default"])(pt, lineString);
var lineBearing = (0, _bearing["default"])(p1, p2); // Check if current point is to the left or right of line
// Line from A=(x1,y1) to B=(x2,y2) a point P=(x,y)
// then (x−x1)(y2−y1)−(y−y1)(x2−x1)
var isPointToLeftOfLine = (groundCoords[0] - p1[0]) * (p2[1] - p1[1]) - (groundCoords[1] - p1[1]) * (p2[0] - p1[0]); // Bearing to draw perpendicular to the line string
var orthogonalBearing = isPointToLeftOfLine < 0 ? lineBearing - 90 : lineBearing - 270; // Get coordinates for the point p3 and p4 which are perpendicular to the lineString
// Add the distance as the current position moves away from the lineString
var p3 = (0, _destination["default"])(p2, ddistance, orthogonalBearing);
var p4 = (0, _destination["default"])(p1, ddistance, orthogonalBearing); //@ts-ignore
return [p3.geometry.coordinates, p4.geometry.coordinates];
}
function distance2d(x1, y1, x2, y2) {
var dx = x1 - x2;
var dy = y1 - y2;
return Math.sqrt(dx * dx + dy * dy);
}
function mix(a, b, ratio) {
return b * ratio + a * (1 - ratio);
}
function nearestPointOnProjectedLine(line, inPoint, viewport) {
var wmViewport = new _viewportMercatorProject["default"](viewport); // Project the line to viewport, then find the nearest point
var coordinates = line.geometry.coordinates;
var projectedCoords = coordinates.map(function (_ref) {
var _ref2 = _slicedToArray(_ref, 3),
x = _ref2[0],
y = _ref2[1],
_ref2$ = _ref2[2],
z = _ref2$ === void 0 ? 0 : _ref2$;
return wmViewport.project([x, y, z]);
}); //@ts-ignore
var _wmViewport$project = wmViewport.project(inPoint.geometry.coordinates),
_wmViewport$project2 = _slicedToArray(_wmViewport$project, 2),
x = _wmViewport$project2[0],
y = _wmViewport$project2[1]; // console.log('projectedCoords', JSON.stringify(projectedCoords));
var minDistance = Infinity;
var minPointInfo = {};
projectedCoords.forEach(function (_ref3, index) {
var _ref4 = _slicedToArray(_ref3, 2),
x2 = _ref4[0],
y2 = _ref4[1];
if (index === 0) {
return;
}
var _projectedCoords = _slicedToArray(projectedCoords[index - 1], 2),
x1 = _projectedCoords[0],
y1 = _projectedCoords[1]; // line from projectedCoords[index - 1] to projectedCoords[index]
// convert to Ax + By + C = 0
var A = y1 - y2;
var B = x2 - x1;
var C = x1 * y2 - x2 * y1; // https://en.wikipedia.org/wiki/Distance_from_a_point_to_a_line
var div = A * A + B * B;
var distance = Math.abs(A * x + B * y + C) / Math.sqrt(div); // TODO: Check if inside bounds
if (distance < minDistance) {
minDistance = distance;
minPointInfo = {
index: index,
x0: (B * (B * x - A * y) - A * C) / div,
y0: (A * (-B * x + A * y) - B * C) / div
};
}
}); //@ts-ignore
var _minPointInfo = minPointInfo,
index = _minPointInfo.index,
x0 = _minPointInfo.x0,
y0 = _minPointInfo.y0;
var _projectedCoords2 = _slicedToArray(projectedCoords[index - 1], 3),
x1 = _projectedCoords2[0],
y1 = _projectedCoords2[1],
_projectedCoords2$ = _projectedCoords2[2],
z1 = _projectedCoords2$ === void 0 ? 0 : _projectedCoords2$;
var _projectedCoords$inde = _slicedToArray(projectedCoords[index], 3),
x2 = _projectedCoords$inde[0],
y2 = _projectedCoords$inde[1],
_projectedCoords$inde2 = _projectedCoords$inde[2],
z2 = _projectedCoords$inde2 === void 0 ? 0 : _projectedCoords$inde2; // calculate what ratio of the line we are on to find the proper z
var lineLength = distance2d(x1, y1, x2, y2);
var startToPointLength = distance2d(x1, y1, x0, y0);
var ratio = startToPointLength / lineLength;
var z0 = mix(z1, z2, ratio);
return {
type: 'Feature',
geometry: {
type: 'Point',
coordinates: wmViewport.unproject([x0, y0, z0])
},
properties: {
// TODO: calculate the distance in proper units
dist: minDistance,
index: index - 1
}
};
}
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destination from '@turf/destination';\nimport bearing from '@turf/bearing';\nimport pointToLineDistance from '@turf/point-to-line-distance';\nimport { point } from '@turf/helpers';\nimport {\n  Position,\n  Point,\n  LineString,\n  FeatureOf,\n  FeatureWithProps,\n  Viewport,\n} from '@nebula.gl/edit-modes';\nimport WebMercatorViewport from 'viewport-mercator-project';\n\n// TODO edit-modes: delete and use edit-modes/utils instead\n\nexport type NearestPointType = FeatureWithProps<Point, { dist: number; index: number }>;\n\nexport function toDeckColor(\n  color?: [number, number, number, number] | number,\n  defaultColor: [number, number, number, number] = [255, 0, 0, 255]\n): [number, number, number, number] {\n  if (!Array.isArray(color)) {\n    return defaultColor;\n  }\n  return [color[0] * 255, color[1] * 255, color[2] * 255, color[3] * 255];\n}\n\n//\n// a GeoJSON helper function that calls the provided function with\n// an argument that is the most deeply-nested array having elements\n// that are arrays of primitives as an argument, e.g.\n//\n// {\n//   \"type\": \"MultiPolygon\",\n//   \"coordinates\": [\n//       [\n//           [[30, 20], [45, 40], [10, 40], [30, 20]]\n//       ],\n//       [\n//           [[15, 5], [40, 10], [10, 20], [5, 10], [15, 5]]\n//       ]\n//   ]\n// }\n//\n// the function would be called on:\n//\n// [[30, 20], [45, 40], [10, 40], [30, 20]]\n//\n// and\n//\n// [[15, 5], [40, 10], [10, 20], [5, 10], [15, 5]]\n//\nexport function recursivelyTraverseNestedArrays(\n  array: Array<any>,\n  prefix: Array<number>,\n  fn: Function\n) {\n  if (!Array.isArray(array[0])) {\n    return true;\n  }\n  for (let i = 0; i < array.length; i++) {\n    if (recursivelyTraverseNestedArrays(array[i], [...prefix, i], fn)) {\n      fn(array, prefix);\n      break;\n    }\n  }\n  return false;\n}\n\nexport function generatePointsParallelToLinePoints(\n  p1: Position,\n  p2: Position,\n  groundCoords: Position\n): Position[] {\n  const lineString: LineString = {\n    type: 'LineString',\n    coordinates: [p1, p2],\n  };\n  const pt = point(groundCoords);\n  const ddistance = pointToLineDistance(pt, lineString);\n  const lineBearing = bearing(p1, p2);\n\n  // Check if current point is to the left or right of line\n  // Line from A=(x1,y1) to B=(x2,y2) a point P=(x,y)\n  // then (x−x1)(y2−y1)−(y−y1)(x2−x1)\n  const isPointToLeftOfLine =\n    (groundCoords[0] - p1[0]) * (p2[1] - p1[1]) - (groundCoords[1] - p1[1]) * (p2[0] - p1[0]);\n\n  // Bearing to draw perpendicular to the line string\n  const orthogonalBearing = isPointToLeftOfLine < 0 ? lineBearing - 90 : lineBearing - 270;\n\n  // Get coordinates for the point p3 and p4 which are perpendicular to the lineString\n  // Add the distance as the current position moves away from the lineString\n  const p3 = destination(p2, ddistance, orthogonalBearing);\n  const p4 = destination(p1, ddistance, orthogonalBearing);\n  //@ts-ignore\n  return [p3.geometry.coordinates, p4.geometry.coordinates];\n}\n\nexport function distance2d(x1: number, y1: number, x2: number, y2: number): number {\n  const dx = x1 - x2;\n  const dy = y1 - y2;\n  return Math.sqrt(dx * dx + dy * dy);\n}\n\nexport function mix(a: number, b: number, ratio: number): number {\n  return b * ratio + a * (1 - ratio);\n}\n\nexport function nearestPointOnProjectedLine(\n  line: FeatureOf<LineString>,\n  inPoint: FeatureOf<Point>,\n  viewport: Viewport\n): NearestPointType {\n  const wmViewport = new WebMercatorViewport(viewport);\n  // Project the line to viewport, then find the nearest point\n  const coordinates: Array<Array<number>> = line.geometry.coordinates as any;\n  const projectedCoords = coordinates.map(([x, y, z = 0]) => wmViewport.project([x, y, z]));\n  //@ts-ignore\n  const [x, y] = wmViewport.project(inPoint.geometry.coordinates);\n  // console.log('projectedCoords', JSON.stringify(projectedCoords));\n\n  let minDistance = Infinity;\n  let minPointInfo = {};\n\n  projectedCoords.forEach(([x2, y2], index) => {\n    if (index === 0) {\n      return;\n    }\n\n    const [x1, y1] = projectedCoords[index - 1];\n\n    // line from projectedCoords[index - 1] to projectedCoords[index]\n    // convert to Ax + By + C = 0\n    const A = y1 - y2;\n    const B = x2 - x1;\n    const C = x1 * y2 - x2 * y1;\n\n    // https://en.wikipedia.org/wiki/Distance_from_a_point_to_a_line\n    const div = A * A + B * B;\n    const distance = Math.abs(A * x + B * y + C) / Math.sqrt(div);\n\n    // TODO: Check if inside bounds\n\n    if (distance < minDistance) {\n      minDistance = distance;\n      minPointInfo = {\n        index,\n        x0: (B * (B * x - A * y) - A * C) / div,\n        y0: (A * (-B * x + A * y) - B * C) / div,\n      };\n    }\n  });\n  //@ts-ignore\n  const { index, x0, y0 } = minPointInfo;\n  const [x1, y1, z1 = 0] = projectedCoords[index - 1];\n  const [x2, y2, z2 = 0] = projectedCoords[index];\n\n  // calculate what ratio of the line we are on to find the proper z\n  const lineLength = distance2d(x1, y1, x2, y2);\n  const startToPointLength = distance2d(x1, y1, x0, y0);\n  const ratio = startToPointLength / lineLength;\n  const z0 = mix(z1, z2, ratio);\n\n  return {\n    type: 'Feature',\n    geometry: {\n      type: 'Point',\n      coordinates: wmViewport.unproject([x0, y0, z0]),\n    },\n    properties: {\n      // TODO: calculate the distance in proper units\n      dist: minDistance,\n      index: index - 1,\n    },\n  };\n}\n"]}