FGMap学习之--三维地图
你是否想让自己的地图以三维的形式展示出来呢？在三维下查看QQ地图、Bing地图、MapABC地图或者自己的地图是否有不一样的感觉呢？今天我们就来看看如果使用FGMap API来实现这个功能。
上次我们做了一个天气预报的示例，今天我们在三维地图上查看，运行界面如下：
看起来好像还不错，当然我们也可以飞行来查看这些天气变化的情况，请点击“飞行浏览”按钮。
再来看看我们的代码：
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="800" minHeight="600"
xmlns:maps="com.fgmap.maps.*">
<fx:Declarations>
</fx:Declarations>
<fx:Style>
TitleWindow
{
roundedBottomCorners: false;
borderAlpha: 0.7;
backgroundAlpha: 0.7;
dropShadowEnabled: true;
borderColor: #9CA299;
}
</fx:Style>
<fx:Script>
<![CDATA[
import com.fgmap.demo.CityData;
import com.fgmap.maps.InfoWindowOptions;
import com.fgmap.maps.LatLng;
import com.fgmap.maps.LatLngBounds;
import com.fgmap.maps.Map;
import com.fgmap.maps.MapEvent;
import com.fgmap.maps.MapMouseEvent;
import com.fgmap.maps.MapMoveEvent;
import com.fgmap.maps.MapOptions;
import com.fgmap.maps.MapType;
import com.fgmap.maps.View;
import com.fgmap.maps.controls.MapTypeControl;
import com.fgmap.maps.controls.NavigationControl;
import com.fgmap.maps.geom.Attitude;
import com.fgmap.maps.interfaces.ICamera;
import com.fgmap.maps.interfaces.IMapType;
import com.fgmap.maps.overlays.Marker;
import com.fgmap.maps.overlays.MarkerOptions;
import com.fgmap.maps.styles.FillStyle;
import com.fgmap.model.CityDataVo;
import local.wx.*;
import mx.collections.ArrayCollection;
import mx.containers.Canvas;
import mx.events.FlexEvent;
import mx.printing.*;
[Bindable]
private var mapTypes:Array;
private var currentMapType:Number;
private var myICamera : ICamera;
private var marker : Marker;
[Bindable]
private var MapColours:ArrayCollection = new ArrayCollection([{label:"Grayscale"},{label:"Colour"}]);
private function map_onMapPreInitialize() : void
{
map.setInitOptions(new MapOptions({
viewMode : View.VIEWMODE_PERSPECTIVE,
attitude : new Attitude(0, 0, 0)
}));
}
private function map_onMapReady() : void
{
intMapType();
map.addEventListener(MapEvent.TILES_LOADED_PENDING, tilesLoading);
map.addEventListener(MapEvent.TILES_LOADED, tilesLoaded);
map.enableScrollWheelZoom();
map.enableContinuousZoom();
doBWMap(map, false);
map.setCenter(new LatLng(30.35,114.17), 5);
map.addControl(new NavigationControl());
map.addControl(new MapTypeControl());
for each(var cityVo:CityDataVo in CityData.Capital) {
var weatherType:String = CityData.WeatherType[int(Math.random() * 11)]
createWXMarker(cityVo.latlng,weatherType);
}
map.flyTo(new LatLng(30.35,114.17), 5, new Attitude(35, 45, 0), 3);
}
private function tilesLoading(event:MapEvent):void
{
lblLoading.setStyle("color", "0xFF0000");
lblLoading.text = "Mapping tiles are loading...";
lblLoading.validateNow();
}
private function tilesLoaded(event:MapEvent):void
{
lblLoading.setStyle("color", "0x00FF00");
lblLoading.text = "Mapping tiles are loaded";
lblLoading.validateNow();
}
public function createWXMarker(latlng:LatLng, type:String): void
{
var options:MarkerOptions;
if (type == "Cloudy")
{
options = new MarkerOptions({icon: new local.wx.Cloudy(),
draggable: false,
clickable: false,
gravity: 2,
distanceScaling: true,
iconAlignment:MarkerOptions.ALIGN_HORIZONTAL_CENTER + MarkerOptions.ALIGN_VERTICAL_CENTER});
}
else if (type == "Partly Cloudy")
{
options = new MarkerOptions({icon: new local.wx.PartlyCloudy(),
draggable: false,
clickable: false,
gravity: 2,
distanceScaling: true,
iconAlignment:MarkerOptions.ALIGN_HORIZONTAL_CENTER + MarkerOptions.ALIGN_VERTICAL_CENTER});
}
else if (type == "Fog Black")
{
options = new MarkerOptions({icon: new local.wx.FogBlack(),
draggable: false,
clickable: false,
gravity: 2,
distanceScaling: true,
iconAlignment:MarkerOptions.ALIGN_HORIZONTAL_CENTER + MarkerOptions.ALIGN_VERTICAL_CENTER});
}
else if (type == "Fog White")
{
options = new MarkerOptions({icon: new local.wx.FogWhite(),
draggable: false,
clickable: false,
gravity: 2,
distanceScaling: true,
iconAlignment:MarkerOptions.ALIGN_HORIZONTAL_CENTER + MarkerOptions.ALIGN_VERTICAL_CENTER});
}
else if (type == "Hail")
{
options = new MarkerOptions({icon: new local.wx.Hail(),
draggable: false,
clickable: false,
gravity: 2,
distanceScaling: true,
iconAlignment:MarkerOptions.ALIGN_HORIZONTAL_CENTER + MarkerOptions.ALIGN_VERTICAL_CENTER});
}
else if (type == "Heavy Rain")
{
options = new MarkerOptions({icon: new local.wx.HeavyRain(),
draggable: false,
clickable: false,
gravity: 2,
distanceScaling: true,
iconAlignment:MarkerOptions.ALIGN_HORIZONTAL_CENTER + MarkerOptions.ALIGN_VERTICAL_CENTER});
}
else if (type == "Light Rain")
{
options = new MarkerOptions({icon: new local.wx.LightRain(),
draggable: false,
clickable: false,
gravity: 2,
distanceScaling: true,
iconAlignment:MarkerOptions.ALIGN_HORIZONTAL_CENTER + MarkerOptions.ALIGN_VERTICAL_CENTER});
}
else if (type == "Lightning")
{
options = new MarkerOptions({icon: new local.wx.Lightning(),
draggable: false,
clickable: false,
gravity: 2,
distanceScaling: true,
iconAlignment:MarkerOptions.ALIGN_HORIZONTAL_CENTER + MarkerOptions.ALIGN_VERTICAL_CENTER});
}
else if (type == "Sleet")
{
options = new MarkerOptions({icon: new local.wx.Sleet(),
draggable: false,
clickable: false,
gravity: 2,
distanceScaling: true,
iconAlignment:MarkerOptions.ALIGN_HORIZONTAL_CENTER + MarkerOptions.ALIGN_VERTICAL_CENTER});
}
else if (type == "Snow")
{
options = new MarkerOptions({icon: new local.wx.Snow(),
draggable: false,
clickable: false,
gravity: 2,
distanceScaling: true,
iconAlignment:MarkerOptions.ALIGN_HORIZONTAL_CENTER + MarkerOptions.ALIGN_VERTICAL_CENTER});
}
else if (type == "Sunny")
{
options = new MarkerOptions({icon: new local.wx.Sunny(),
draggable: false,
clickable: false,
gravity: 2,
distanceScaling: true,
iconAlignment:MarkerOptions.ALIGN_HORIZONTAL_CENTER + MarkerOptions.ALIGN_VERTICAL_CENTER});
}
var markerLocal:Marker = new Marker(latlng, options);
map.addOverlay(markerLocal);
}
private function doBWMap(myMap:Map, doBW:Boolean):void
{
var s1:Sprite = map.getChildAt(1) as Sprite;
var targetObject:Sprite = s1.getChildAt(0) as Sprite;
var matrix:Array = new Array();
if (doBW)
{
// Black & White Object
matrix = matrix.concat([0.36577734829179775,0.6012741339631636,0.14454173149981608,0,0]); // red
matrix = matrix.concat([0.34975509588844284,0.6103753117891721,0.1424311139968783,0,0]); // green
matrix = matrix.concat([0.3484091095395311,0.6023337490798816,0.16297410831863204,0,0]); // blue
matrix = matrix.concat([0,0,0,0.9,0]); // alpha
//targetObject.filters = [new ColorMatrixFilter(matrix)];
}
else
{
// Reset to colour
matrix = matrix.concat([1, 0, 0, 0, 0]); // red
matrix = matrix.concat([0, 1, 0, 0, 0]); // green
matrix = matrix.concat([0, 0, 1, 0, 0]); // blue
matrix = matrix.concat([0, 0, 0, 1, 0]); // alpha
//targetObject.filters = [new ColorMatrixFilter(matrix)];
}
}
private function intMapType():void
{
mapTypes = new Array(MapType.NORMAL_MAP_TYPE, MapType.SATELLITE_MAP_TYPE, MapType.HYBRID_MAP_TYPE, MapType.PHYSICAL_MAP_TYPE);
if (!currentMapType)
currentMapType = 1;
}
private function mapTypeChangeHandler():void
{
//currentMapType = mapType.selectedIndex;
//map.setMapType(IMapType(mapTypes[currentMapType]));
}
private function getMapTypeLabels(item:Object):String
{
return IMapType(item).getName();
}
private function doCanvasPrint(myMap:Map3D, myCanvas:Canvas, printBitmap:Boolean):void
{
var myWidth : Number;
var myHeight : Number;
var myScaleX : Number;
var myScaleY : Number;
// Record current dimensions
myWidth = myCanvas.width;
myHeight = myCanvas.height;
myScaleX = myCanvas.scaleX;
myScaleY = myCanvas.scaleY;
var pj:PrintJob = new PrintJob();
var po:PrintJobOptions = new PrintJobOptions();
po.printAsBitmap = printBitmap;
if (pj.start() == true)
{
// Scale it
myCanvas.scaleX = 0.6;
myCanvas.scaleY = 0.6;
myCanvas.validateNow();
// Resize it
myCanvas.height = pj.pageHeight;
myCanvas.width = pj.pageWidth;
myCanvas.validateNow();
// Print it (do the -1 on rectangle to ensure you don't get background of canvas container, usually shown as a thin blue line)
pj.addPage(myCanvas as Sprite, new Rectangle(1, 1, (myCanvas.width * (1 / myCanvas.scaleX)) - 1, (myCanvas.height * (1 / myCanvas.scaleY)) - 1), po);
pj.send();
// Scale it back again
myCanvas.scaleX = myScaleX;
myCanvas.scaleY = myScaleY;
myCanvas.validateNow();
// Resize it back again
myCanvas.height = myHeight;
myCanvas.width = myWidth;
myCanvas.validateNow();
}
}
private function doTour():void
{
for each(var cityVo:CityDataVo in CityData.Capital) {
map.flyTo(cityVo.latlng, 7, new Attitude(35, 45, 0), 3);
}
}
]]>
</fx:Script>
<mx:Label x="10" y="10" text="Weather Map" fontSize="12" fontWeight="bold" color="#FFFFFF"/>
<mx:Button label="Print..." click="doCanvasPrint(map, mapCanvas, true)" right="456" top="10" height="22" width="100"/>
<mx:Canvas id="mapCanvas" borderStyle="solid" borderColor="#FFFFFF" left="10" right="10" top="38" bottom="10">
<maps:Map3D id="map"
mapevent_mappreinitialize="map_onMapPreInitialize()"
mapevent_mapready="map_onMapReady()" top="0" bottom="0" left="0" right="0"/>
</mx:Canvas>
<mx:Label color="#FF0606" id="lblLoading" right="10" textAlign="right" top="12" width="196"/>
<mx:Button id="btnTour" label="飞行浏览" click="doTour()" right="564" top="10" height="22" width="100"/>
<s:Label x="15" y="15" text="三维天气预报" fontSize="16" fontWeight="bold"/>
</s:Application>
需要代码的朋友可以这里下载：http://files.cnblogs.com/liongis/3DWeatherMap.rar
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