2025-summer/team-3
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smooth line drawing

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This commit is contained in:
Laura Klünder 2017-11-28 14:48:46 +01:00
parent 5184206b49
commit 8d657eb34f
1 changed files with 19 additions and 1 deletions
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20
src/c3nav/site/static/site/js/c3nav.js
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@ -276,7 +276,7 @@ c3nav = {
},
_add_line_to_route: function(level, coords, gray, link_to_level) {
if (coords.length < 2) return;
var latlngs = L.GeoJSON.coordsToLatLngs(coords),
var latlngs = L.GeoJSON.coordsToLatLngs(c3nav._smooth_line(coords)),
routeLayer = c3nav._routeLayers[level];
line = L.polyline(latlngs, {
color: gray ? '#888888': $('button.swap').css('color'),
@ -296,6 +296,24 @@ c3nav = {
});
}
},
_smooth_line: function(coords) {
if (coords.length > 2) {
for (var i=0; i<4; i++) {
coords = c3nav._smooth_line_iteration(coords);
}
}
return coords
},
_smooth_line_iteration: function(coords) {
// Chaikin'S Corner Cutting Algorithm
var new_coords = [coords[0]];
for (var i=1; i<coords.length-1; i++) {
new_coords.push([(coords[i][0]*5+coords[i-1][0])/6, (coords[i][1]*5+coords[i-1][1])/6]);
new_coords.push([(coords[i][0]*5+coords[i+1][0])/6, (coords[i][1]*5+coords[i+1][1])/6]);
}
new_coords.push(coords[coords.length-1]);
return new_coords
},
_equal_states: function (a, b) {
if (a.routing !== b.routing || a.details !== b.details) return false;
if ((a.origin && a.origin.id) !== (b.origin && b.origin.id)) return false;