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BangleApps/apps/dedreckon/dedreckon.app.js

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JavaScript
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/* Ded Reckon */
/* eslint-disable no-unused-vars */
/* fmt library v0.1.3 */
let fmt = {
icon_alt : "\0\x08\x1a\1\x00\x00\x00\x20\x30\x78\x7C\xFE\xFF\x00\xC3\xE7\xFF\xDB\xC3\xC3\xC3\xC3\x00\x00\x00\x00\x00\x00\x00\x00",
icon_m : "\0\x08\x1a\1\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xC3\xE7\xFF\xDB\xC3\xC3\xC3\xC3\x00\x00\x00\x00\x00\x00\x00\x00",
icon_km : "\0\x08\x1a\1\xC3\xC6\xCC\xD8\xF0\xD8\xCC\xC6\xC3\x00\xC3\xE7\xFF\xDB\xC3\xC3\xC3\xC3\x00\x00\x00\x00\x00\x00\x00\x00",
icon_kph : "\0\x08\x1a\1\xC3\xC6\xCC\xD8\xF0\xD8\xCC\xC6\xC3\x00\xC3\xE7\xFF\xDB\xC3\xC3\xC3\xC3\x00\xFF\x00\xC3\xC3\xFF\xC3\xC3",
icon_c : "\0\x08\x1a\1\x00\x00\x60\x90\x90\x60\x00\x7F\xFF\xC0\xC0\xC0\xC0\xC0\xFF\x7F\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
/* 0 .. DD.ddddd
1 .. DD MM.mmm'
2 .. DD MM'ss"
*/
geo_mode : 1,
init: function() {},
fmtDist: function(km) {
if (km >= 1.0) return km.toFixed(1) + this.icon_km;
return (km*1000).toFixed(0) + this.icon_m;
},
fmtSteps: function(n) { return this.fmtDist(0.001 * 0.719 * n); },
fmtAlt: function(m) { return m.toFixed(0) + this.icon_alt; },
draw_dot : 1,
add0: function(i) {
if (i > 9) {
return ""+i;
} else {
return "0"+i;
}
},
fmtTOD: function(now) {
this.draw_dot = !this.draw_dot;
let dot = ":";
if (!this.draw_dot)
dot = ".";
return now.getHours() + dot + this.add0(now.getMinutes());
},
fmtNow: function() { return this.fmtTOD(new Date()); },
fmtTimeDiff: function(d) {
if (d < 180)
return ""+d.toFixed(0);
d = d/60;
return ""+d.toFixed(0)+"m";
},
fmtAngle: function(x) {
switch (this.geo_mode) {
case 0:
return "" + x;
case 1: {
let d = Math.floor(x);
let m = x - d;
m = m*60;
return "" + d + " " + m.toFixed(3) + "'";
}
case 2: {
let d = Math.floor(x);
let m = x - d;
m = m*60;
let mf = Math.floor(m);
let s = m - mf;
s = s*60;
return "" + d + " " + mf + "'" + s.toFixed(0) + '"';
}
}
return "bad mode?";
},
fmtPos: function(pos) {
let x = pos.lat;
let c = "N";
if (x<0) {
c = "S";
x = -x;
}
let s = c+this.fmtAngle(x) + "\n";
c = "E";
if (x<0) {
c = "W";
x = -x;
}
return s + c + this.fmtAngle(x);
},
fmtFix: function(fix, t) {
if (fix && fix.fix && fix.lat) {
return this.fmtSpeed(fix.speed) + " " +
this.fmtAlt(fix.alt);
} else {
return "N/FIX " + this.fmtTimeDiff(t);
}
},
fmtSpeed: function(kph) {
return kph.toFixed(1) + this.icon_kph;
},
};
/* gps library v0.1.1 */
let gps = {
emulator: -1,
init: function(x) {
this.emulator = (process.env.BOARD=="EMSCRIPTEN"
|| process.env.BOARD=="EMSCRIPTEN2")?1:0;
},
state: {},
on_gps: function(f) {
let fix = this.getGPSFix();
f(fix);
/*
"lat": number, // Latitude in degrees
"lon": number, // Longitude in degrees
"alt": number, // altitude in M
"speed": number, // Speed in kph
"course": number, // Course in degrees
"time": Date, // Current Time (or undefined if not known)
"satellites": 7, // Number of satellites
"fix": 1 // NMEA Fix state - 0 is no fix
"hdop": number, // Horizontal Dilution of Precision
*/
this.state.timeout = setTimeout(this.on_gps, 1000, f);
},
off_gps: function() {
clearTimeout(this.state.timeout);
},
getGPSFix: function() {
if (!this.emulator)
return Bangle.getGPSFix();
let fix = {};
fix.fix = 1;
fix.lat = 50;
fix.lon = 14-(getTime()-this.gps_start) / 1000; /* Go West! */
fix.alt = 200;
fix.speed = 5;
fix.course = 30;
fix.time = Date();
fix.satellites = 5;
fix.hdop = 12;
return fix;
},
gps_start : -1,
start_gps: function() {
Bangle.setGPSPower(1, "libgps");
this.gps_start = getTime();
},
stop_gps: function() {
Bangle.setGPSPower(0, "libgps");
},
};
/* ui library 0.1 */
let ui = {
display: 0,
numScreens: 2,
drawMsg: function(msg) {
g.reset().setFont("Vector", 35)
.setColor(1,1,1)
.fillRect(0, this.wi, 176, 176)
.setColor(0,0,0)
.drawString(msg, 5, 30);
},
drawBusy: function() {
this.drawMsg("\n.oO busy");
},
nextScreen: function() {
print("nextS");
this.display = this.display + 1;
if (this.display == this.numScreens)
this.display = 0;
this.drawBusy();
},
prevScreen: function() {
print("prevS");
this.display = this.display - 1;
if (this.display < 0)
this.display = this.numScreens - 1;
this.drawBusy();
},
onSwipe: function(dir) {
this.nextScreen();
},
h: 176,
w: 176,
wi: 32,
last_b: 0,
touchHandler: function(d) {
let x = Math.floor(d.x);
let y = Math.floor(d.y);
if (d.b != 1 || this.last_b != 0) {
this.last_b = d.b;
return;
}
print("touch", x, y, this.h, this.w);
/*
if ((x<this.h/2) && (y<this.w/2)) {
}
if ((x>this.h/2) && (y<this.w/2)) {
}
*/
if ((x<this.h/2) && (y>this.w/2)) {
print("prev");
this.prevScreen();
}
if ((x>this.h/2) && (y>this.w/2)) {
print("next");
this.nextScreen();
}
},
init: function() {
}
};
var last_steps = Bangle.getStepCount(), last_time = getTime(), speed = 0, step_phase = 0;
var mpstep = 0.719 * 1.15;
function updateSteps() {
if (step_phase ++ > 9) {
step_phase =0;
let steps = Bangle.getStepCount();
let time = getTime();
speed = 3.6 * mpstep * ((steps-last_steps) / (time-last_time));
last_steps = steps;
last_time = time;
}
return "" + fmt.fmtSpeed(speed) + " " + step_phase + "\n" + fmt.fmtDist(log_dist/1000) + " " + fmt.fmtDist(log_last/1000);
}
/* compensated compass */
var CALIBDATA = require("Storage").readJSON("magnav.json",1)||null;
const tiltfixread = require("magnav").tiltfixread;
var heading;
var cancel_gps = false;
function drawStats() {
let fix = gps.getGPSFix();
let msg = fmt.fmtFix(fix, getTime() - gps.gps_start);
msg += "\n" + fmt.fmtDist(gps_dist/1000) + " " + fmt.fmtDist(gps_last/1000) + "\n" + updateSteps();
let c = Bangle.getCompass();
if (c) msg += "\n" + c.heading.toFixed(0) + "/" + heading.toFixed(0) + "deg " + log.length + "\n";
g.reset().clear().setFont("Vector", 31)
.setColor(1,1,1)
.fillRect(0, 24, 176, 100)
.setColor(0,0,0)
.drawString(msg, 3, 25);
}
function updateGps() {
if (cancel_gps)
return;
heading = tiltfixread(CALIBDATA.offset,CALIBDATA.scale);
if (ui.display == 0) {
setTimeout(updateGps, 1000);
drawLog();
drawStats();
}
if (ui.display == 1) {
setTimeout(updateGps, 1000);
drawLog();
}
}
function stopGps() {
cancel_gps=true;
gps.stop_gps();
}
var log = [], log_dist = 0, gps_dist = 0;
var log_last = 0, gps_last = 0;
function logEntry() {
let e = {};
e.time = getTime();
e.fix = gps.getGPSFix();
e.steps = Bangle.getStepCount();
if (0) {
let c = Bangle.getCompass();
if (c)
e.dir = c.heading;
else
e.dir = -1;
} else {
e.dir = heading;
}
return e;
}
function onTurn() {
let e = logEntry();
log.push(e);
}
function radians(a) { return a*Math.PI/180; }
function degrees(a) { return a*180/Math.PI; }
// distance between 2 lat and lons, in meters, Mean Earth Radius = 6371km
// https://www.movable-type.co.uk/scripts/latlong.html
// (Equirectangular approximation)
function calcDistance(a,b) {
var x = radians(b.lon-a.lon) * Math.cos(radians((a.lat+b.lat)/2));
var y = radians(b.lat-a.lat);
return Math.sqrt(x*x + y*y) * 6371000;
}
var dn, de;
function initConv(fix) {
let n = { lat: fix.lat+1, lon: fix.lon };
let e = { lat: fix.lat, lon: fix.lon+1 };
dn = calcDistance(fix, n);
de = calcDistance(fix, e);
print("conversion is ", dn, 108000, de, 50000);
}
function toM(start, fix) {
return { x: (fix.lon - start.lon) * de, y: (fix.lat - start.lat) * dn };
}
var mpp = 4;
function toPix(q) {
let p = { x: q.x, y: q.y };
p.x /= mpp; /* 10 m / pix */
p.y /= -mpp;
p.x += 85;
p.y += 85;
return p;
}
function drawLog() {
let here = logEntry();
if (!here.fix.lat) {
here.fix.lat = 50;
here.fix.lon = 14;
}
initConv(here.fix);
log.push(here);
let l = log;
log_dist = 0;
log_last = -1;
gps_last = -1;
g.reset().clear();
g.setColor(0, 0, 1);
let last = { x: 0, y: 0 };
for (let i = l.length - 2; i >= 0; i--) {
let next = {};
let m = (l[i+1].steps - l[i].steps) * mpstep;
let dir = radians(180 + l[i].dir);
next.x = last.x + m * Math.sin(dir);
next.y = last.y + m * Math.cos(dir);
print(dir, m, last, next);
let lp = toPix(last);
let np = toPix(next);
g.drawLine(lp.x, lp.y, np.x, np.y);
g.drawCircle(np.x, np.y, 3);
last = next;
if (log_last == -1)
log_last = m;
log_dist += m;
}
g.setColor(0, 1, 0);
last = { x: 0, y: 0 };
gps_dist = 0;
for (let i = l.length - 2; i >= 0; i--) {
let fix = l[i].fix;
if (fix.fix && fix.lat) {
let next = toM(here.fix, fix);
let lp = toPix(last);
let np = toPix(next);
let d = Math.sqrt((next.x-last.x)*(next.x-last.x)+(next.y-last.y)*(next.y-last.y));
if (gps_last == -1)
gps_last = d;
gps_dist += d;
g.drawLine(lp.x, lp.y, np.x, np.y);
g.drawCircle(np.x, np.y, 3);
last = next;
}
}
log.pop();
}
function testPaint() {
let pos = gps.getGPSFix();
log = [];
let e = { fix: pos, steps: 100, dir: 0 };
log.push(e);
e = { fix: pos, steps: 200, dir: 90 };
log.push(e);
e = { fix: pos, steps: 300, dir: 0 };
log.push(e);
print(log, log.length, log[0], log[1]);
drawLog();
}
function touchHandler(d) {
let x = Math.floor(d.x);
let y = Math.floor(d.y);
if (d.b != 1 || ui.last_b != 0) {
ui.last_b = d.b;
return;
}
if ((x<ui.h/2) && (y<ui.w/2)) {
ui.drawMsg("Turn");
onTurn();
}
if ((x>ui.h/2) && (y<ui.w/2)) {
ui.drawMsg("Writing");
require('Storage').writeJSON("speedstep."+getTime()+".json", log);
ui.drawMsg("Wrote");
}
ui.touchHandler(d);
}
fmt.init();
gps.init();
ui.init();
ui.drawBusy();
gps.start_gps();
Bangle.setCompassPower(1, "speedstep");
Bangle.on("drag", touchHandler);
Bangle.setUI({
mode : "custom",
swipe : (s) => ui.onSwipe(s),
clock : 0
});
if (0)
testPaint();
if (1) {
g.reset();
updateGps();
}
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