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| import Feature from 'ol/Feature.js';
import Map from 'ol/Map.js';
import MousePosition from 'ol/control/MousePosition.js';
import View from 'ol/View.js';
import {
Circle as CircleStyle,
Fill,
Stroke,
Style,
Text,
} from 'ol/style.js';
import {Draw, Snap} from 'ol/interaction.js';
import {LineString, Point, Polygon} from 'ol/geom.js';
import {OSM, Vector as VectorSource} from 'ol/source.js';
import {Tile as TileLayer, Vector as VectorLayer} from 'ol/layer.js';
const raster = new TileLayer({
source: new OSM(),
});
const nodes = new VectorSource({wrapX: false});
const nodesLayer = new VectorLayer({
source: nodes,
style: function (f) {
const style = new Style({
image: new CircleStyle({
radius: 8,
fill: new Fill({color: 'rgba(255, 0, 0, 0.2)'}),
stroke: new Stroke({color: 'red', width: 1}),
}),
text: new Text({
text: f.get('node').id.toString(),
fill: new Fill({color: 'red'}),
stroke: new Stroke({
color: 'white',
width: 3,
}),
}),
});
return [style];
},
});
const edges = new VectorSource({wrapX: false});
const edgesLayer = new VectorLayer({
source: edges,
style: function (f) {
const style = new Style({
stroke: new Stroke({
color: 'blue',
width: 1,
}),
text: new Text({
text: f.get('edge').id.toString(),
fill: new Fill({color: 'blue'}),
stroke: new Stroke({
color: 'white',
width: 2,
}),
}),
});
return [style];
},
});
const faces = new VectorSource({wrapX: false});
const facesLayer = new VectorLayer({
source: faces,
style: function (f) {
const style = new Style({
stroke: new Stroke({
color: 'black',
width: 1,
}),
fill: new Fill({
color: 'rgba(0, 255, 0, 0.2)',
}),
text: new Text({
font: 'bold 12px sans-serif',
text: f.get('face').id.toString(),
fill: new Fill({color: 'green'}),
stroke: new Stroke({
color: 'white',
width: 2,
}),
}),
});
return [style];
},
});
const map = new Map({
layers: [raster, facesLayer, edgesLayer, nodesLayer],
target: 'map',
view: new View({
center: [-11000000, 4600000],
zoom: 16,
}),
});
const topo = topolis.createTopology();
topo.on('addnode', nodeToFeature);
topo.on('removenode', function (e) {
removeElementFeature(nodes, e);
});
topo.on('addedge', edgeToFeature);
topo.on('modedge', function (e) {
const feature = edges.getFeatureById(e.id);
feature.setGeometry(new LineString(e.coordinates));
});
topo.on('removeedge', function (e) {
removeElementFeature(edges, e);
});
topo.on('addface', faceToFeature);
topo.on('removeface', function (e) {
removeElementFeature(faces, e);
});
function removeElementFeature(source, element) {
const feature = source.getFeatureById(element.id);
source.removeFeature(feature);
}
function nodeToFeature(node) {
const feature = new Feature({
geometry: new Point(node.coordinate),
node: node,
});
feature.setId(node.id);
nodes.addFeature(feature);
}
function edgeToFeature(edge) {
const feature = new Feature({
geometry: new LineString(edge.coordinates),
edge: edge,
});
feature.setId(edge.id);
edges.addFeature(feature);
}
function faceToFeature(face) {
const coordinates = topo.getFaceGeometry(face);
const feature = new Feature({
geometry: new Polygon(coordinates),
face: face,
});
feature.setId(face.id);
faces.addFeature(feature);
}
function createNode(topo, coord) {
let node;
const existingEdge = topo.getEdgeByPoint(coord, 5)[0];
if (existingEdge) {
node = topo.modEdgeSplit(existingEdge, coord);
} else {
node = topo.addIsoNode(coord);
}
return node;
}
function onDrawend(e) {
const edgeGeom = e.feature.getGeometry().getCoordinates();
const startCoord = edgeGeom[0];
const endCoord = edgeGeom[edgeGeom.length - 1];
let start, end;
try {
start = topo.getNodeByPoint(startCoord);
end = topo.getNodeByPoint(endCoord);
const edgesAtStart = topo.getEdgeByPoint(startCoord, 5);
const edgesAtEnd = topo.getEdgeByPoint(endCoord, 5);
const crossing = topo.getEdgesByLine(edgeGeom);
if (
crossing.length === 1 &&
!start &&
!end &&
edgesAtStart.length === 0 &&
edgesAtEnd.length === 0
) {
topo.remEdgeNewFace(crossing[0]);
start = crossing[0].start;
if (start.face) {
topo.removeIsoNode(start);
}
end = crossing[0].end;
if (end.face) {
topo.removeIsoNode(end);
}
return;
}
if (!start) {
start = createNode(topo, startCoord);
edgeGeom[0] = start.coordinate;
}
if (!end) {
end = createNode(topo, endCoord);
edgeGeom[edgeGeom.length - 1] = end.coordinate;
}
topo.addEdgeNewFaces(start, end, edgeGeom);
} catch (e) {
toastr.warning(e.toString());
}
}
const draw = new Draw({
type: 'LineString',
});
draw.on('drawend', onDrawend);
map.addInteraction(draw);
const snap = new Snap({
source: edges,
});
map.addInteraction(snap);
map.addControl(new MousePosition());
|
)
