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app.js
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app.js
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function initialize() {
// 位置情報データ取得
sendQuery(endpoint, query)
.fail(
function (xhr, textStatus, thrownError) {
//$('body').modalmanager('removeLoading');
alert("Error: A '" + textStatus+ "' occurred.");
}
)
.done(
function (json) {
// 位置情報データから母点の座標情報に
var sitePointsCoordinates = [];
json.results.bindings.forEach(function(point){
sitePointsCoordinates.push([point.longitude.value, point.latitude.value]);
});
drawMap(sitePointsCoordinates);
}
);
}
function drawMap(sitePointsCoordinates) {
var mapOptions = {
center : new google.maps.LatLng(
initial_latitude,
initial_longitude),
zoom : initial_zoom,
};
var map = new google.maps.Map(document.getElementById("map_canvas"),mapOptions);
var overlay = new google.maps.OverlayView();
overlay.onAdd = function () {
var layer = d3.select(this.getPanes().overlayLayer).append("div")
.classed("svg_container", true);
var svg = layer.append("svg");
var voronoiVertexContainer = svg.append("g")
.classed("voronoi_vertex_container", true)
.attr("opacity", "0.6");
overlay.draw = function () {
// 緯度・経度データをピクセル情報に変換
var projection = this.getProjection();
var googleMapProjection = function (coordinates) {
var googleCoordinates = new google.maps.LatLng(coordinates[1], coordinates[0]);
var coordinatesPx = projection.fromLatLngToDivPixel(googleCoordinates);
return [coordinatesPx.x + 4000, coordinatesPx.y + 4000];
};
var sitePointsCoordinatesPx = [];
sitePointsCoordinates.forEach(function(coordinates) {
sitePointsCoordinatesPx.push(googleMapProjection(coordinates));
});
// 母点が存在する座標の範囲を求める
var maxXPx, maxYPx, minXPx, minYPx;
sitePointsCoordinatesPx.forEach(function(sp){
if(sp[0]>maxXPx || maxXPx == null) {
maxXPx = sp[0];
} else if(sp[0]<minXPx || minXPx == null) {
minXPx = sp[0];
}
if(sp[1]>maxYPx || maxYPx == null) {
maxYPx = sp[1];
} else if(sp[1]<minYPx || minYPx == null) {
minYPx = sp[1];
}
});
// 母点の座標(px)からボロノイ点の座標(px)と各ボロノイ点について最も近い母点との距離(px)を求める
var getDistance = function (point1, point2) {
xDiff = point1[0]-point2[0];
yDiff = point1[1]-point2[1];
return Math.sqrt(Math.pow(xDiff,2) + Math.pow(yDiff,2));
};
var polygons = d3.geom.voronoi(sitePointsCoordinatesPx);
var voronoiPoints = [];
for (var polyKey = 0; polyKey < polygons.length; polyKey++) {
// エラー処理
if (!(polyKey in polygons)) continue;
polygons[polyKey].forEach(function(polygon){
var voronoiPoint = {
coordinatesPx : [ polygon[0],
polygon[1] ],
distancePx : getDistance(polygon,sitePointsCoordinatesPx[polyKey])
};
// 同座標の点は、最も近い母点との距離を採用する
var isValid = true;
if(voronoiPoint.coordinatesPx[0]<=maxXPx && voronoiPoint.coordinatesPx[0]>=minXPx &&
voronoiPoint.coordinatesPx[1]<=maxYPx && voronoiPoint.coordinatesPx[1]>=minYPx){
for(var vorKey = 0; vorKey < voronoiPoints.length; vorKey++){
if(voronoiPoints[vorKey].coordinatesPx.toString() == voronoiPoint.coordinatesPx.toString()){
if(voronoiPoints[vorKey].distance <= voronoiPoint.distance) {
isValid = false;
} else {
voronoiPoints.splice(vorKey,1);
break;
}
}
}
} else {
isValid = false;
}
if(isValid) voronoiPoints.push(voronoiPoint);
});
}
// 母点との距離の平均を求める
var sumDistancePx = 0;
voronoiPoints.forEach(function(vp){
sumDistancePx += vp.distancePx;
});
var aveDistancePx = sumDistancePx/voronoiPoints.length;
// 母点描画
var toiletMarkSize = map.getZoom()*4;
var sitePointsAttributes = {
"x" : function(d, i) { return sitePointsCoordinatesPx[i][0]-toiletMarkSize/2; },
"y" : function(d, i) { return sitePointsCoordinatesPx[i][1]-toiletMarkSize/2; },
"xlink:href" : icon_name,
"height" : toiletMarkSize+"px",
"width" : toiletMarkSize+"px"
};
svg.selectAll("image.site_points")
.data(sitePointsCoordinatesPx)
.classed("site_points", true)
.attr(sitePointsAttributes)
.enter()
.append("svg:image")
.classed("site_points", true)
.attr(sitePointsAttributes);
// ボロノイ点描画
var voronoiPointsAttributes = {
"cx":function(d, i) { return voronoiPoints[i].coordinatesPx[0]; },
"cy":function(d, i) { return voronoiPoints[i].coordinatesPx[1]; },
"r" :function(d, i) {
var radius = voronoiPoints[i].distancePx - aveDistancePx/2;
if(radius>0){
return radius;
} else {
return 0;
}
},
"fill":"#e74c3c"
}
voronoiVertexContainer.selectAll("circle.voronoi_points")
.data(voronoiPoints)
.classed("voronoi_points", true)
.attr(voronoiPointsAttributes)
.enter()
.append("svg:circle")
.classed("voronoi_points", true)
.attr(voronoiPointsAttributes);
};
};
overlay.setMap(map);
}
google.maps.event.addDomListener(window, 'load', initialize);