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disable circularize if object is already circular

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This commit is contained in:
Katarzyna Król
2019-10-29 01:56:49 +01:00
parent 0cccff4079
commit 3feb20c764
1 changed files with 41 additions and 1 deletions
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42
modules/actions/circularize.js
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@@ -6,7 +6,7 @@ import {
polygonCentroid as d3_polygonCentroid
} from 'd3-polygon';
import { geoVecInterp, geoVecLength } from '../geo';
import { geoVecInterp, geoVecLength} from '../geo';
import { osmNode } from '../osm/node';
import { utilArrayUniq } from '../util';
@@ -228,6 +228,46 @@ export function actionCircularize(wayId, projection, maxAngle) {
if (!graph.entity(wayId).isClosed()) {
return 'not_closed';
}
var way = graph.entity(wayId);
var nodes = utilArrayUniq(graph.childNodes(way));
var points = nodes.map(function(n) { return projection(n.loc); });
var sign = d3_polygonArea(points) > 0 ? 1 : -1;
var hull = d3_polygonHull(points);
if (hull.length !== points.length || hull.length < 3){
return false;
}
var centroid = d3_polygonCentroid(points);
var radius = d3_median(points, function(p) { return geoVecLength(centroid, p); });
// compare distances between centroid and points
for (var i = 0; i<hull.length; i++){
var actualPoint = hull[i];
var actualDist = geoVecLength(actualPoint, centroid);
if (Math.abs(actualDist - radius > 1)) {
return false;
}
}
var startAngle = Math.atan2(hull[0][1] - centroid[1], hull[0][0] - centroid[0]);
var endAngle = Math.atan2(hull[1][1] - centroid[1], hull[1][0] - centroid[0]);
var eachAngle = (endAngle - startAngle);
//compare central angles
for (i = 0; i<hull.length; i++){
actualPoint = hull[i];
var nextPoint = hull[(i+1)%hull.length];
startAngle = Math.atan2(actualPoint[1] - centroid[1], actualPoint[0] - centroid[0]);
endAngle = Math.atan2(nextPoint[1] - centroid[1], nextPoint[0] - centroid[0]);
var angle = endAngle - startAngle;
if (angle * sign > 0) {
angle = -sign * (2 * Math.PI - Math.abs(angle));
}
if (Math.abs((angle) - eachAngle) > 0.05) {
return false;
}
}
return 'already_circular';
};