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Xiaoji Chen
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,40 +1,46 @@ | ||
| import Protobuf from 'pbf'; | ||
| import {VectorTile} from '@mapbox/vector-tile'; | ||
| import {worldToLngLat} from 'viewport-mercator-project'; | ||
| import {vectorTileFeatureToGeoJSON} from './feature'; | ||
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| const TILE_SIZE = 512; | ||
| const PI = Math.PI; | ||
| const PI_4 = PI / 4; | ||
| const RADIANS_TO_DEGREES_2 = 360 / PI; | ||
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| export function decodeTile(x, y, z, arrayBuffer) { | ||
| const tile = new VectorTile(new Protobuf(arrayBuffer)); | ||
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| const result = []; | ||
| const xProj = x * TILE_SIZE; | ||
| const yProj = y * TILE_SIZE; | ||
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| const scale = Math.pow(2, z); | ||
| const projX = x / scale; | ||
| const projY = y / scale; | ||
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| const projectFunc = project.bind(null, xProj, yProj, scale); | ||
| const projectFunc = project.bind(null, projX, projY, scale); | ||
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| for (const layerName in tile.layers) { | ||
| const vectorTileLayer = tile.layers[layerName]; | ||
| for (let i = 0; i < vectorTileLayer.length; i++) { | ||
| const vectorTileFeature = vectorTileLayer.feature(i); | ||
| const features = vectorTileFeatureToGeoJSON(vectorTileFeature, projectFunc); | ||
| features.forEach(f => { | ||
| for (const f of features) { | ||
| f.properties.layer = layerName; | ||
| result.push(f); | ||
| }); | ||
| } | ||
| } | ||
| } | ||
| return result; | ||
| } | ||
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| function project(x, y, scale, line, extent) { | ||
| const sizeToPixel = extent / TILE_SIZE; | ||
| const pixelToCommon = 1 / extent / scale; | ||
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| for (let ii = 0; ii < line.length; ii++) { | ||
| const p = line[ii]; | ||
| for (let i = 0; i < line.length; i++) { | ||
| const p = line[i]; | ||
| // common space | ||
| const cx = x + p[0] * pixelToCommon; | ||
| const cy = y + p[1] * pixelToCommon; | ||
| // LNGLAT | ||
| line[ii] = worldToLngLat([x + p[0] / sizeToPixel, y + p[1] / sizeToPixel], scale); | ||
| p[0] = cx * 360 - 180; | ||
| p[1] = (Math.atan(Math.exp(PI - cy * 2 * PI)) - PI_4) * RADIANS_TO_DEGREES_2; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,42 +1,33 @@ | ||
| // NOTE: To use this example standalone (e.g. outside of deck.gl repo) | ||
| // delete the local development overrides at the bottom of this file | ||
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| // avoid destructuring for older Node version support | ||
| const resolve = require('path').resolve; | ||
| const webpack = require('webpack'); | ||
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| const CONFIG = { | ||
| mode: 'development', | ||
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| entry: { | ||
| app: resolve('./app.js') | ||
| app: './app.js' | ||
| }, | ||
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| devtool: 'source-map', | ||
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| module: { | ||
| rules: [ | ||
| { | ||
| // Compile ES2015 using buble | ||
| // Transpile ES6 to ES5 with babel | ||
| // Remove if your app does not use JSX or you don't need to support old browsers | ||
| test: /\.js$/, | ||
| loader: 'buble-loader', | ||
| include: [resolve('.')], | ||
| loader: 'babel-loader', | ||
| exclude: [/node_modules/], | ||
| options: { | ||
| objectAssign: 'Object.assign' | ||
| presets: ['@babel/preset-react'] | ||
| } | ||
| } | ||
| ] | ||
| }, | ||
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| resolve: { | ||
| alias: { | ||
| // From mapbox-gl-js README. Required for non-browserify bundlers (e.g. webpack): | ||
| 'mapbox-gl$': resolve('./node_modules/mapbox-gl/dist/mapbox-gl.js') | ||
| } | ||
| }, | ||
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| // Optional: Enables reading mapbox token from environment variable | ||
| plugins: [new webpack.EnvironmentPlugin(['MapboxAccessToken'])] | ||
| }; | ||
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| // This line enables bundling against src in this repo rather than installed deck.gl module | ||
| module.exports = env => (env ? require('../webpack.config.local')(CONFIG)(env) : CONFIG); | ||
| // This line enables bundling against src in this repo rather than installed module | ||
| module.exports = env => (env ? require('..//webpack.config.local')(CONFIG)(env) : CONFIG); |