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minimap.js
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import { geoPath } from "d3-geo";
import { geoArea } from "d3-geo";
import { bbox } from "../bbox.js";
import { getproj } from "../projections/projections.js";
const d3 = Object.assign({}, { geoPath, geoArea });
export function minimap({
mainmap = {
selection: null,
projection: null,
width: null,
height: null,
},
id,
x = 5,
y = 5,
geojson = land,
extent = null,
threshold = 0.1,
precision = 10,
projection = "Equirectangular",
width = 200,
background = {
stroke: "black",
strokeWidth: 1,
strokeOpacity: 1,
fill: "white",
fillOpacity: 1,
},
frame = {
stroke: "none",
strokeWidth: 1,
strokeOpacity: 1,
fill: "red",
fillOpacity: 0.25,
},
geometries = {
fill: "#CCC",
stroke: "none",
strokeWidth: 1,
fillOpacity: 1,
strokeOpacity: 1,
},
raise = {
fill: "red",
stroke: "none",
strokeWidth: 1,
fillOpacity: 1,
strokeOpacity: 1,
},
dot = {
fill: "red",
r: 5,
stroke: "none",
strokeWidth: 1,
fillOpacity: 1,
strokeOpacity: 1,
},
} = {}) {
// inique id
const clipid =
Date.now().toString(36) + Math.random().toString(36).substring(2);
// extent
extent =
Array.isArray(extent) &&
Array.isArray(extent[0]) &&
Array.isArray(extent[1])
? bbox(extent)
: extent;
const outline = { type: "Sphere" };
// selection
let selection = mainmap.selection;
let sel = selection
.append("g")
.attr("class", id)
.attr("data-layer", JSON.stringify({ _type: "minimap" }));
// projection
projection = getproj(projection);
projection = projection.fitWidth(width, extent ? extent : outline);
const path = d3.geoPath(projection);
// extent clip
let bb = "";
if (extent != null) {
bb = path.bounds(extent);
sel
.append("clipPath")
.attr("id", `extent_${clipid}`)
.append("rect")
.attr("x", 0)
.attr("y", 0)
.attr("width", bb[1][0])
.attr("height", bb[1][1]);
}
// Outline (fill)
if (extent == null) {
sel
.append("g")
.append("path")
.attr("d", path(outline))
.attr("fill", background.fill)
.attr("fill-opacity", background.fillOpacity)
.attr("stroke", "none")
.attr("transform", `translate(${x} ${y})`);
} else {
sel
.append("g")
.append("rect")
.attr("x", 0)
.attr("y", 0)
.attr("width", bb[1][0])
.attr("height", bb[1][1])
.attr("fill", background.fill)
.attr("fill-opacity", background.fillOpacity)
.attr("stroke", "none")
.attr("transform", `translate(${x} ${y})`);
}
// world
sel
.append("g")
.append("path")
.datum(geojson)
.attr("fill", geometries.fill)
.attr("fill-opacity", geometries.fillOpacity)
.attr("stroke", geometries.stroke)
.attr("stroke-width", geometries.strokeWidth)
.attr("stroke-opacity", geometries.strokeOpacity)
.attr("d", path)
.attr("transform", `translate(${x} ${y})`)
.attr("clip-path", `url(#extent_${clipid})`); // ICI
// Outline (stroke)
if (extent == null) {
sel
.append("g")
.append("path")
.attr("d", path(outline))
.attr("fill", "none")
.attr("stroke", background.stroke)
.attr("stroke-width", background.strokeWidth)
.attr("stroke-opacity", background.strokeOpacity)
.attr("transform", `translate(${x} ${y})`);
} else {
sel
.append("g")
.append("rect")
.attr("x", 0)
.attr("y", 0)
.attr("width", bb[1][0])
.attr("height", bb[1][1])
.attr("fill", "none")
.attr("stroke", background.stroke)
.attr("stroke-width", background.strokeWidth)
.attr("stroke-opacity", background.strokeOpacity)
.attr("transform", `translate(${x} ${y})`);
}
// Map area
let rangx = [];
for (let i = 0; i <= mainmap.width; i += mainmap.width / precision) {
rangx.push(i);
}
let rangy = [];
for (let i = 0; i <= mainmap.height; i += mainmap.width / precision) {
rangy.push(i);
}
let coords = [];
coords.push(rangx.map((d) => mainmap.projection.invert([d, 0])));
coords.push(rangy.map((d) => mainmap.projection.invert([mainmap.width, d])));
coords.push(
rangx.reverse().map((d) => mainmap.projection.invert([d, mainmap.height]))
);
coords.push(rangy.reverse().map((d) => mainmap.projection.invert([0, d])));
const rect = {
type: "Feature",
geometry: {
type: "Polygon",
coordinates: [coords.flat()],
},
};
if (d3.geoArea(rect) > threshold) {
sel
.append("g")
.append("path")
.datum(rect)
.attr("fill", frame.fill)
.attr("fill-opacity", frame.fillOpacity)
.attr("stroke", frame.stroke)
.attr("stroke-width", frame.strokeWidth)
.attr("stroke-opacity", frame.strokeOpacity)
.attr("d", path)
.attr("transform", `translate(${x} ${y})`);
// clip
sel
.append("clipPath")
.attr("id", `clipminimap_${clipid}`)
.append("path")
.datum(rect)
.attr("d", d3.geoPath(projection));
sel
.append("g")
.append("path")
.attr("clip-path", `url(#clipminimap_${clipid})`)
.datum(geojson)
.attr("fill", raise.fill)
.attr("fill-opacity", raise.fillOpacity)
.attr("stroke", raise.stroke)
.attr("stroke-width", raise.strokeWidth)
.attr("stroke-opacity", raise.strokeOpacity)
.attr("d", path)
.attr("transform", `translate(${x} ${y})`);
} else {
const center = mainmap.projection.invert([
mainmap.width / 2,
mainmap.height / 2,
]);
sel
.append("circle")
.attr("cx", projection(center)[0])
.attr("cy", projection(center)[1])
.attr("fill", dot.fill)
.attr("fill-opacity", dot.fillOpacity)
.attr("stroke", dot.stroke)
.attr("stroke-width", dot.strokeWidth)
.attr("stroke-opacity", dot.strokeOpacity)
.attr("r", dot.r)
.attr("transform", `translate(${x} ${y})`);
}
}
// Land ----------------------------------------------------------------
const land = {
type: "FeatureCollection",
features: [
{
type: "Feature",
properties: {},
geometry: {
type: "MultiPolygon",
coordinates: [
[
[
[9.8, 1],
[4.41, 6.36],
[-7.54, 4.35],
[-16.73, 12.33],
[-17.01, 21.2],
[-5.91, 35.81],
[11.31, 37],
[10.33, 33.7],
[19.06, 30.27],
[21.61, 32.93],
[34.48, 31.58],
[36.02, 36.93],
[27.67, 36.66],
[26.74, 40.4],
[41.5, 42.64],
[31.19, 46.63],
[22.57, 40.05],
[13.71, 45.59],
[15.61, 40.07],
[3.94, 43.53],
[-2.13, 36.74],
[-9, 37.02],
[-9.29, 42.92],
[-1.79, 43.39],
[-1.37, 48.66],
[9.44, 54.81],
[21.04, 55.3],
[21.85, 65.54],
[13.28, 55.35],
[7.42, 62.6],
[18.6, 70.1],
[27.77, 71.19],
[41.02, 67.7],
[34.77, 64.56],
[66.93, 71.3],
[102.03, 77.22],
[111.14, 76.75],
[106.36, 73.19],
[124.38, 73.81],
[130.57, 70.96],
[141.55, 72.77],
[160.54, 69.36],
[179.95, 68.97],
[179.61, 62.71],
[163.39, 59.62],
[156.72, 50.89],
[155.55, 55.28],
[164.03, 61.35],
[146.33, 59.71],
[135.22, 54.89],
[141.53, 53.18],
[140.17, 48.45],
[126.67, 37.83],
[117.76, 39.11],
[121.63, 28.54],
[116.49, 22.94],
[106.79, 21.01],
[109.44, 14.1],
[104.89, 9.85],
[91.62, 22.54],
[80.26, 15.67],
[76.54, 8.94],
[70.98, 20.71],
[66.25, 25.47],
[57.33, 25.78],
[47.95, 29.99],
[51.22, 24.63],
[56.08, 26.11],
[57.84, 19.02],
[43.95, 12.6],
[35.22, 28.05],
[39.72, 15.26],
[44.27, 10.46],
[51.29, 11.83],
[47.95, 4.46],
[40.17, -2.76],
[39.86, -16.43],
[27.1, -33.53],
[19.95, -34.81],
[11.85, -18.14],
[13.64, -12.25],
[9.8, 1],
],
[
[27.64, 58],
[27.64, 58],
],
[
[5.07, 52.92],
[5.07, 52.92],
],
[
[133.26, 45.54],
[133.26, 45.54],
],
[
[57.64, 42.15],
[57.64, 42.15],
],
[
[60.06, 44.85],
[60.06, 44.85],
],
[
[34.86, -13.51],
[34.86, -13.51],
],
[
[29.21, -3.33],
[29.21, -3.33],
],
[
[34, 0.25],
[34, 0.25],
],
[
[48.87, 38.43],
[54.01, 36.82],
[50.3, 44.66],
[48.87, 38.43],
],
],
[
[
[8.72, 3.8],
[8.72, 3.8],
],
],
[
[
[179.08, -8.36],
[179.08, -8.36],
],
],
[
[
[179.18, -8],
[179.18, -8],
],
],
[
[
[73.71, 4.23],
[73.71, 4.23],
],
],
[
[
[73.41, 5.19],
[73.41, 5.19],
],
],
[
[
[73.37, 3.53],
[73.37, 3.53],
],
],
[
[
[-61.77, 17.13],
[-61.77, 17.13],
],
],
[
[
[50.42, 26.6],
[50.42, 26.6],
],
],
[
[
[-78.15, 25.26],
[-78.15, 25.26],
],
],
[
[
[-77.25, 25.13],
[-77.25, 25.13],
],
],
[
[
[-59.53, 13.06],
[-59.53, 13.06],
],
],
[
[
[43.87, -12.2],
[43.87, -12.2],
],
],
[
[
[-23.9, 15.8],
[-23.9, 15.8],
],
],
[
[
[-61.45, 15.56],
[-61.45, 15.56],
],
],
[
[
[11.95, 55.99],
[11.95, 55.99],
],
],
[
[
[-16.13, 28.6],
[-16.13, 28.6],
],
],
[
[
[3.2, 39.88],
[3.2, 39.88],
],
],
[
[
[-7.41, 62.14],
[-7.41, 62.14],
],
],
[
[
[158.06, 6.98],
[158.06, 6.98],
],
],
[
[
[-2.51, 49.41],
[-2.51, 49.41],
],
],
[
[
[-61.56, 12.03],
[-61.56, 12.03],
],
],
[
[
[-4.6, 54.09],
[-4.6, 54.09],
],
],
[
[
[15.66, 38.42],
[15.66, 38.42],
],
],
[
[
[9.12, 41.24],
[9.12, 41.24],
],
],
[
[
[-2.12, 49.26],
[-2.12, 49.26],
],
],
[
[
[-158.96, 2.2],
[-158.96, 2.2],
],
],
[
[
[-62.67, 17.34],
[-62.67, 17.34],
],
],
[
[
[-60.95, 13.71],
[-60.95, 13.71],
],
],
[
[
[171.05, 7.14],
[171.05, 7.14],
],
],
[
[
[14.55, 35.76],
[14.55, 35.76],
],
],
[
[
[57.71, -20.1],
[57.71, -20.1],
],
],
[
[
[167.02, -0.55],
[167.02, -0.55],
],
],
[
[
[134.66, 7.59],
[134.66, 7.59],
],
],
[
[
[104.28, 1.37],
[104.28, 1.37],
],
],
[
[
[6.69, 0.07],
[6.69, 0.07],
],
],
[
[
[55.49, -4.52],
[55.49, -4.52],
],
],
[
[
[-175.25, -20.99],
[-175.25, -20.99],
],
],
[
[
[-61.2, 13.1],
[-61.2, 13.1],
],
],
[
[
[-172.27, -13.44],
[-172.27, -13.44],
],
],
[
[
[-53.38, -33.74],
[-64.89, -40.71],
[-65.97, -48.05],
[-71.03, -53.81],
[-75.43, -47.25],
[-72.46, -41.99],
[-70.39, -18.34],
[-81.1, -6.07],
[-77.34, 6.54],
[-94.85, 16.43],
[-103.5, 18.33],
[-123.73, 38.92],
[-122.21, 47.99],
[-134.24, 58.21],
[-151.57, 60.99],
[-156.55, 56.98],
[-166.37, 63.1],
[-166.55, 68.36],
[-156.82, 71.31],
[-135.87, 68.91],
[-127.84, 70.24],
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