Android Question Google Map waypoints

[prajinpraveen]

Hello all. I have a set of way points (eg: 10 waypoints) which i use to create a route from point A (a moving object - car) to Point B. i use google api to find the distance and time from moving object point A to Point B.

Issue : how would i know if point A has passed a way point 1,2 & 3 on the route and i should omit these way points when i calculate my new distance and time.

Thank you,

 

[Erel]

Calculate the distance between the car location and the next marker and once it is smaller than x meters you should move to the next waypoint. You can use Location from the GPS library to calculate the distance.

 

[prajinpraveen]

Thanks Erel. Do i have to keep a map/list of waypoints and compare it to the new/current location of the car. Car should follow the waypoint in an order.
Problem is , there could be situations where waypoint 9 is closer to the car than waypoint 2. but the car should go to waypoint 2 first.

what i am trying to achieve is to calculate time and distance to reach point 9 (going through the way points)

 

[Erel]

Store the points in a List and only check the distance to the next point.

 

[maleche]

Just what I am looking for!
I too have a list of waypoints which mark various hazards. While moving, I scan through the list and check DistanceTo(). However, I only want to check for (waypoints)hazards within 90 degrees of my heading. I also have the Text To Speech (TTS) speak the hazard and distance. I don't want the speech to continue after passing the point.
also, I've noticed that the speech tends to lag my display during voice I've tried buffering but i'll have to keep experimenting.
thanks in advance!