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BangleApps
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getting reading for detecting stops

master
frederic wagner 2022-08-26 14:25:35 +02:00
parent 81118092f0
commit 37379720d2
1 changed files with 24 additions and 27 deletions
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51
apps/gipy/app.js
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@ -45,38 +45,38 @@ class Status {
}
this.remaining_distances = r; // how much distance remains at start of each segment
this.starting_time = getTime();
this.stopped_at = this.starting_time; // we need to now how long we stop in order to compute real avg speed
this.old_points = [];
this.old_times = [];
}
new_position_reached(position) {
let now = getTime();
// we try to figure out direction by looking at previous points
// instead of the gps course which is not very nice.
if (this.old_points.length == 0) {
this.old_points.push(position);
this.old_times.push(now);
} else {
let last_point = this.old_points[this.old_points.length - 1];
if (last_point.lon != position.lon || last_point.lat != position.lat) {
if (this.old_points.length == 4) {
this.old_points.shift();
this.old_times.shift();
}
this.old_points.push(position);
this.old_times.push(now);
} else {
return null;
}
}
let now = getTime();
this.old_points.push(position);
this.old_times.push(now);
if (this.old_points.length == 1) {
return null;
} else {
// let's just take angle of segment between oldest and newest point
let oldest = this.old_points[0];
let diff = position.minus(oldest);
let angle = Math.atan2(diff.lat, diff.lon);
return angle;
}
let last_point = this.old_points[this.old_points.length - 1];
let oldest = this.old_points[0];
this.instant_speed =
oldest_point.distance(last_point) / (now - this.old_times[0]);
if (this.old_points.length == 8) {
this.old_points.shift();
this.old_times.shift();
}
// let's just take angle of segment between newest point and a point a bit before
let previous_index = this.old_points.length - 3;
if (previous_index < 0) {
previous_index = 0;
}
let diff = position.minus(this.old_points[previous_index]);
let angle = Math.atan2(diff.lat, diff.lon);
return angle;
}
update_position(new_position, maybe_direction) {
let direction = this.new_position_reached(new_position);
@ -241,10 +241,7 @@ class Status {
g.getHeight() - 49
);
let instant_speed =
this.old_points[0].distance(this.old_points[this.old_points.length - 1]) /
(point_time - this.old_times[0]);
let approximate_instant_speed = Math.round(instant_speed * 3.6);
let approximate_instant_speed = Math.round(this.instant_speed * 3.6);
g.setFont("6x8:2")
.setFontAlign(-1, -1, 0)