itowns/lib/Converter/textureConverter.js

A JS/WebGL framework for 3D geospatial data visualization

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

var _typeof = require("@babel/runtime/helpers/typeof");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = void 0;

var THREE = _interopRequireWildcard(require("three"));

var _Feature2Texture = _interopRequireDefault(require("./Feature2Texture"));

var _Extent = _interopRequireDefault(require("../Core/Geographic/Extent"));

var _Crs = _interopRequireDefault(require("../Core/Geographic/Crs"));

function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }

function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

var extentTexture = new _Extent["default"]('EPSG:4326', [0, 0, 0, 0]);

var textureLayer = function (texture, layer) {
  texture.generateMipmaps = false;
  texture.magFilter = layer.magFilter || THREE.LinearFilter;
  texture.minFilter = layer.minFilter || THREE.LinearFilter;
  return texture;
};

function textureColorLayer(texture, layer) {
  texture.anisotropy = 16;
  texture.premultiplyAlpha = layer.transparent;
  return textureLayer(texture, layer);
}

var _default = {
  convert: function convert(data, extentDestination, layer) {
    var texture;

    if (data.isFeatureCollection) {
      var backgroundLayer = layer.source.backgroundLayer;
      var backgroundColor = backgroundLayer && backgroundLayer.paint ? new THREE.Color(backgroundLayer.paint['background-color']) : undefined;
      extentDestination.as(_Crs["default"].formatToEPSG(layer.crs), extentTexture);
      texture = _Feature2Texture["default"].createTextureFromFeature(data, extentTexture, 256, layer.style, backgroundColor);
      texture.features = data;
      texture.extent = extentDestination;
    } else if (data.isTexture) {
      texture = data;
    } else {
      throw new Error('Data type is not supported to convert into texture');
    }

    if (layer.isColorLayer) {
      return textureColorLayer(texture, layer);
    } else if (layer.isElevationLayer) {
      if (texture.flipY) {
        // DataTexture default to false, so make sure other Texture types
        // do the same (eg image texture)
        // See UV construction for more details
        texture.flipY = false;
      }

      return textureLayer(texture, layer);
    }
  }
};
exports["default"] = _default;