如何在Google Map中绘制弧形折线?
我已经使用此代码创建了弯曲的折线.
以下是绘制弯曲折线的方法:
private void showCurvedPolyline (LatLng p1, LatLng p2, double k) {
//Calculate distance and heading between two points
double d = SphericalUtil.computeDistanceBetween(p1,p2);
double h = SphericalUtil.computeHeading(p1, p2);
//Midpoint position
LatLng p = SphericalUtil.computeOffset(p1, d*0.5, h);
//Apply some mathematics to calculate position of the circle center
double x = (1-k*k)*d*0.5/(2*k);
double r = (1+k*k)*d*0.5/(2*k);
LatLng c = SphericalUtil.computeOffset(p, x, h + 90.0);
//Polyline options
PolylineOptions options = new PolylineOptions();
List<PatternItem> pattern = …Run Code Online (Sandbox Code Playgroud) android google-maps polyline android-custom-view google-maps-android-api-2
如何在Google Maps中的两个坐标点之间绘制圆弧(如此图像)和iOS中的facebook post相同?
优步应用程序有一条弯曲的折线,甚至还包括一个阴影.阴影可能只是一个黑色,透明折线连接两个点.这很容易.但第二条折线有曲线,如何实现呢?这是Bezier曲线,还是像setGeodesic(true)这样的内置函数?
我查看了谷歌地图示例,我看到了有关圆形折线的部分.这可以适应创建半圆吗?来自demo的代码片段.
PolylineOptions options = new PolylineOptions();
int radius = 5; //What is that?
int numPoints = 100;
double phase = 2 * Math.PI / numPoints;
for (int i = 0; i <= numPoints; i++) {
options.add(new LatLng(SYDNEY.latitude + radius * Math.sin(i * phase),
SYDNEY.longitude + radius * Math.cos(i * phase)));
}
int color = Color.RED;
mMap.addPolyline(options
.color(color)
.width(2));
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