利用SVG图片的路径生成的湖北省地图

ゞ浴缸里的玫瑰 2022-08-24 04:27 512阅读 0赞

先来看看效果图：

1.全省图

![SouthEast][]

2.鼠标悬浮在咸宁图

![SouthEast 1][]

3.点击咸宁后显示咸宁区县图

![SouthEast 2][]

说明：

这里的地图数据存放在一个json文件中，如：

"-1":{
    		"areaids":["0719","0710","0722","0718","0717","0712","0724","0716","0728","0027","0715","0714","0711","0713"],
    		"childNums":[9,10,3,8,10,7,4,7,3,20,6,6,4,10],
    		"areanames":["十堰","襄阳","随州","恩施","宜昌","孝感","荆门","荆州","江汉","武汉","咸宁","黄石","鄂州","黄冈"],
    		"attrs":["#D4E7E7","#C3CEBD","#C3BFBA","#E5EAE3","#ABB0A9","#FFFEEB","#F4F4F4","#D4E7E7","#C3CEBD","#E5EAE3","#ABD4D5","#C3BFBA","#C3CEBD","#D4E7E7"],
    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    	}

这是全省地图的数据。

其中最重要的数据当属pathdata了。它是生成地图的关键。pathdata的是一个路径数组。数据在.svg图片文件中提取。如：

![SouthEast 3][]

用浏览器打开一个.svg图片文件，找到里面的<path>里的路径信息，复制出来。一个path对应地图的一个区域哦。（注：不能把.png.jpg等非路径图片转成.svg文件，这样的.svg文件中是不存在<path>的，只有<image>。）

另外您也可能发现了，地图貌似有些不对？如江汉。其实江汉是由三个市组成的。因为地图是我画的，不要见怪。

回到pathdata的生成问题，流程是这样的，先自己画图，懂PS的人应该知道，用钢笔或多边形工具可以画出“路径”。这些路径组成地图的区域块，最后合成一个整体地图。可以不填充颜色。画完后保存。最后转成.svg文件。用UE打开（或直接用浏览器打开，查看原源文件），就可以看到<path>啦，复制出来放到pathdata数组中就OK啦。

最后说一下，代码写的可能有些粗糙，见谅哈。(有需要画图的可以留言，当然我不一定经常上来看。)

下载地址：[http://download.csdn.net/detail/yunsyz/7551269][http_download.csdn.net_detail_yunsyz_7551269]

[SouthEast]: /images/20220823/241468964c0642e98682d58645ea3292.png
[SouthEast 1]: /images/20220823/2b9351de254a47bfb2ba455082616559.png
[SouthEast 2]: /images/20220823/9098520301144807809c55c481f0f695.png
[SouthEast 3]: /images/20220823/add520bc382e43ba85fb7b4174dfa7b0.png
[http_download.csdn.net_detail_yunsyz_7551269]: http://download.csdn.net/detail/yunsyz/7551269