javascript – GMap轴承旋转运动平稳(更改轴承值时避免抖动效应)

我想通过改变轴承角度值来旋转GMap,因此相机围绕中心点旋转(360度一整圈).
当我们更换轴承时,相机的起点和终点会产生缓和效果.如何更改轴承值(为了360度旋转地图,平滑动画),我如何控制/改变它以使旋转平滑？

对于所有语言都需要这样,因为它看起来在不同语言库中的缓动效果是不同的.例如Swift,Android,PHP,JS,Node.js,React.

Swift示例(在线性动画中运行OK)：

请注意,最初动画确实在iOS中也有混蛋,但是当我们使用CAMediaTimingFunction(名称：kCAMediaTimingFunctionLinear沿着它的CATransaction属性,然后GMap动画变成平滑动画.所以现在如果你看到下面的代码,轴承的变化value不会产生生涩效果(由于GMap动画中的缓动效果).我也在寻找适合Android和Web的解决方案.

//Move the map around current location, first loop
let timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionLinear)
CATransaction.begin()
CATransaction.setValue(3.0, forKey: kCATransactionAnimationDuration)
CATransaction.setAnimationTimingFunction(timingFunction)
CATransaction.setCompletionBlock({
    //Move the map around current location, second loop
    let timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionLinear)
    CATransaction.begin()
    CATransaction.setValue(3.0, forKey: kCATransactionAnimationDuration)
    CATransaction.setAnimationTimingFunction(timingFunction)
    CATransaction.setCompletionBlock({
        //Move the map around current location, third loop
        let timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionLinear)
        CATransaction.begin()
        CATransaction.setValue(3.0, forKey: kCATransactionAnimationDuration)
        CATransaction.setAnimationTimingFunction(timingFunction)
        CATransaction.setCompletionBlock({
            UIView.animate(withDuration: 0.5, animations: {
                self.findingYourLocation.alpha = 0.0
            })
            //TODO: Set nearest branch
            // Zoom in one zoom level
            let zoomCamera = GMSCameraUpdate.zoomIn()
            self.mapView.animate(with: zoomCamera)

            // Center the camera on UBL Branch when animation finished
            //let nearestBranch = CLLocationCoordinate2D(latitude: 24.850751, longitude: 67.016589)
            let nearestBranch = CLLocationCoordinate2D.init(latitude: 24.806849, longitude: 67.038734)
            let nearestBranchCam = GMSCameraUpdate.setTarget(nearestBranch)



            CATransaction.begin()

            let timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
            CATransaction.setValue(3.0, forKey: kCATransactionAnimationDuration)
            CATransaction.setAnimationTimingFunction(timingFunction)
            CATransaction.setCompletionBlock({
                self.nextButton.alpha = 1.0
            })
            self.mapView.animate(with: nearestBranchCam)
            self.mapView.animate(toZoom: 15)
            self.mapView.animate(toBearing: 0)
            self.mapView.animate(toViewingAngle: 0)

            CATransaction.commit()

        })
        self.mapView.animate(toBearing: self.mapView.camera.bearing + 120)
        CATransaction.commit()

    })
    self.mapView.animate(toBearing: self.mapView.camera.bearing + 120)
    CATransaction.commit()

})
self.mapView.animate(toBearing: self.mapView.camera.bearing + 120)
CATransaction.commit()

Android示例代码(有问题)：

可以在此处找到Android示例/示例代码：https://issuetracker.google.com/issues/71738889

其中还包括.apk文件,示例应用输出的.mp4视频.当360度旋转地图时,当轴承值发生变化时,这清楚地显示出不稳定的效果.

解决方法:

将此作为答案作为评论将难以阅读;这取自google documentation.

考虑以下代码：

CameraPosition cameraPosition = new CameraPosition.Builder()
    .target(MOUNTAIN_VIEW)      // Sets the center of the map to Mountain View
    .zoom(17)                   // Sets the zoom
    .bearing(90)                // Sets the orientation of the camera to east
    .tilt(30)                   // Sets the tilt of the camera to 30 degrees
    .build();                   // Creates a CameraPosition from the builder
map.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));

这段代码创建了一个新的摄像机位置,这正是你想要改变的东西：摄像机的方位.因此,如果您创建一个新的相机位置,如下所示：

CameraPosition cameraPosition = new CameraPosition.Builder()
    .bearing(50)
    .build();

然后将相机设置为该位置的动画：

map.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));

这应该够了吧.提供有关您需要用作轴承的更多信息：

a bearing of 90 degrees results in a map where the upwards direction points due east.

祝好运.

标签：android,javascript,swift,google-maps,bearing
来源： https://codeday.me/bug/20191006/1859499.html