如何仅基于两个点绘制两条平行多边形线（类似于谷歌地图流量）(How do I draw two parallel poly lines based on only two points (simila

如何仅基于两个点绘制两条平行多边形线（类似于谷歌地图流量）(How do I draw two parallel poly lines based on only two points (similar to google maps traffic))

我有一条从A点到B点的折线，我试图弄清楚如何绘制两条恒定宽度的线，看起来就像这张图像。

我只有两点，而不是四点，我想也许有一种方法可以创建四个点，基于两个然后绘制相应的线，但我似乎无法绕过它。

有什么建议么

I have a Polyline that is drawn from point A to point B, I'm trying to figure out how to draw two lines of a constant width that appear something like this image.

I only have two points, rather than four, I thought maybe there was a way to create four points, based on the two and then draw the corresponding lines, but I cant seem to get my head around it.

Any suggestions

最满意答案

我目前正在努力实现同样的目标，有两条平行的折线，但颜色不同。

你见过这个吗：

http://wtp2.appspot.com/ParallelLines.htm

它使用Google Maps v2 API，但将其转换为API v3似乎非常简单。

I am currently trying to achieve the same thing, have two parallel polylines, but with different colors.

Have you seen this:

http://wtp2.appspot.com/ParallelLines.htm

It uses Google Maps v2 API, but it seems quite simple to convert it to API v3.