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Implement canvas-based bus system

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ElementalAlchemist 2 weeks ago
parent 5012c2cee2
commit 7fca10593d
10 changed files with 186 additions and 152 deletions
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thrimbletrimmer/driveclock/db_dawn.png
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thrimbletrimmer/driveclock/db_day.png
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thrimbletrimmer/driveclock/db_dusk.png
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thrimbletrimmer/driveclock/db_night.png
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thrimbletrimmer/driveclock/db_stop.png
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thrimbletrimmer/driveclock/drive.css
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thrimbletrimmer/driveclock/drive.html
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<!doctype html> <!doctype html>
<html> <html>
<head>
<style> <meta charset="utf-8" />
#road-container { <title>Bus Progress</title>
width: 100%; <link rel="stylesheet" href="drive.css" />
height: 100px; <script src="drive.js"></script>
left: 0; </head>
top: 0; <body>
position: absolute; <canvas id="road" width="1920" height="100"></canvas>
// margin: 980px 0 0 -100px; // uncomment to move to bottom of screen </body>
z-index: 3; </html>
}
#road-container div {
height: 100px;
width: 100%;
position: absolute;
background-position: 0px 0px;
}
#timeofday-left {
z-index: 5;
}
#timeofday-right {
z-index: 4;
}
#stops {
z-index: 6;
background-image: url(stops.png);
}
#bus {
background-repeat: no-repeat;
margin-left: 27px;
z-index: 8;
}
</style>
<body>
<div id="road-container">
<div id="bus"></div>
<div id="timeofday-left"></div>
<div id="timeofday-right"></div>
<div id="stops"></div>
</div>
<script src="drive.js"></script>
</body>

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thrimbletrimmer/driveclock/drive.js
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const COLORS = {
const PAGE_WIDTH = 1920; day: {
const MINUTES_PER_PAGE = 60; sky: "#41cee2",
const POINT_WIDTH = PAGE_WIDTH * 8 * 60 / MINUTES_PER_PAGE; ground: "#e5931b",
const MILES_PER_PAGE = 45; surface: "#b77616",
const BUS_POSITION_X = 93; },
const BASE_ODO = 109.3; dusk: {
const UPDATE_INTERVAL_MS = 5000 sky: "#db92be",
const WUBLOADER_URL = ""; ground: "#dd926a",
const SKY_URLS = { surface: "#b17555",
day: "db_day.png", },
dawn: "db_dawn.png", night: {
dusk: "db_dusk.png", sky: "#121336",
night: "db_night.png", ground: "#30201a",
}; surface: "#261a15",
const BUS_URLS = { },
day: "bus_day.png", dawn: {
dawn: "bus_day.png", sky: "#2b2f87",
dusk: "bus_day.png", ground: "#724d41",
night: "bus_night.png", surface: "#5b3e34",
},
}; };
function setSkyElements(left, right, timeToTransition) { // The width from the left side of the bus image to the front of the bus
const leftElement = document.getElementById("timeofday-left"); const BUS_FRONT_OFFSET = 73;
const rightElement = document.getElementById("timeofday-right");
const busElement = document.getElementById("bus");
leftElement.style.backgroundImage = `url(${SKY_URLS[left]})`; // Start time of each day phase
rightElement.style.backgroundImage = `url(${SKY_URLS[right]})`; const DAY_START_MINUTES = 450;
const DUSK_START_MINUTES = 1140;
const NIGHT_START_MINUTES = 1200;
const DAWN_START_MINUTES = 400;
if (left === right) { const BUS_STOP_OFFSET = 6;
leftElement.style.width = "100%"; const POINT_OFFSET = 17;
} else {
const transitionPercent = timeToTransition / MINUTES_PER_PAGE;
leftElement.style.width = `${transitionPercent * 100}%`
}
bus.style.backgroundImage = `url(${BUS_URLS[left]})`; // Bus stop positions are recorded in miles with the 0 position
} // at route start. This array can be looped every point.
const BUS_STOP_POSITIONS = [1, 55.2, 125.4, 166.3, 233.9, 295.2];
function nextSkyTransition(timeofday, clock) { // The default scaling factor is 20 seconds per pixel at max speed.
switch (timeofday) { // This gives us
case "dawn": // - 3px per minute
// - 4px per mile
let scaleFactor = 1;
function nextPhase(timeOfDay) {
switch (timeOfDay) {
case "day": case "day":
return [19 * 60, "dusk"]; // 7pm case "dawn":
return "dusk";
case "dusk": case "dusk":
return [20 * 60, "night"]; // 8pm return "night";
case "night": case "night":
return [6 * 60 + 40, "dawn"]; // 6:40am return "dawn";
} }
} }
function setSky(timeofday, clock) { function phaseStartTime(timeOfDay) {
const [transition, newSky] = nextSkyTransition(timeofday, clock); switch (timeOfDay) {
// 1440 minutes in 24h, this code will return time remaining even if case "day":
// the transition is in the morning and we're currently in the evening. return DAY_START_MINUTES;
const timeToTransition = (1440 + transition - clock) % 1440; case "dusk":
if (timeToTransition < MINUTES_PER_PAGE) { return DUSK_START_MINUTES;
// Transition on screen case "night":
setSkyElements(timeofday, newSky, timeToTransition); return NIGHT_START_MINUTES;
} else { case "dawn":
// No transition on screen return DAWN_START_MINUTES;
setSkyElements(timeofday, timeofday, undefined);
} }
} }
function setOdo(odo) { function drawBackground(context, timeOfDay, leftX, width) {
const distancePixels = PAGE_WIDTH * (odo - BASE_ODO) / MILES_PER_PAGE; const skyColor = COLORS[timeOfDay].sky;
const offset = (BUS_POSITION_X - distancePixels) % POINT_WIDTH; const groundColor = COLORS[timeOfDay].ground;
const surfaceColor = COLORS[timeOfDay].surface;
const stopsElement = document.getElementById("stops"); context.fillStyle = COLORS[timeOfDay].sky;
stopsElement.style.backgroundPosition = `${offset}px 0px`; context.fillRect(leftX, 0, width, 100);
context.fillStyle = COLORS[timeOfDay].surface;
context.fillRect(leftX, 80, width, 1);
context.fillStyle = COLORS[timeOfDay].ground;
context.fillRect(leftX, 81, width, 7);
context.fillRect(leftX, 89, width, 3);
context.fillRect(leftX, 94, width, 2);
context.fillRect(leftX, 99, width, 1);
} }
async function update() { async function drawRoad() {
const busDataResponse = await fetch(`${WUBLOADER_URL}/thrimshim/bus/buscam`); const busDataResponse = await fetch("/thrimshim/bus/buscam");
if (!busDataResponse.ok) { if (!busDataResponse.ok) {
return; return;
} }
const busData = await busDataResponse.json(); const busData = await busDataResponse.json();
console.log("Got data:", busData);
setOdo(busData.odometer);
setSky(busData.timeofday, busData.clock_minutes);
}
// Initial conditions, before the first refresh finishes const canvas = document.getElementById("road");
setSky("day", 7 * 60); if (!canvas.getContext) {
setOdo(BASE_ODO); return;
}
// Testing mode. Set true to enable. const context = canvas.getContext("2d");
const test = false;
if (test) { // Clear the previous canvas before starting
let h = 0; context.clearRect(0, 0, 1920, 100);
// Set to how long 1h of in-game time should take in real time
const hourTimeMs = 1 * 1000; const currentTime = busData.clock_minutes;
// Set to how often to update the screen const distance = busData.odometer;
const interval = 30; const timeOfDay = busData.timeofday;
setInterval(() => {
h += interval / hourTimeMs; drawBackground(context, timeOfDay, 0, BUS_FRONT_OFFSET);
setOdo(BASE_ODO + 45 * h);
if (h < 19) { const maxWidth = 1920 - BUS_FRONT_OFFSET;
setSky("day", 60 * h);
} else { // TODO Figure out scaling factor
m = (h % 24) * 60; const startMinute = busData.clock_minutes;
let tod; const timeDuration = maxWidth / 3;
if (m < 6 * 60 + 40) {
tod = "night"; let previousTime = startMinute;
} else if (m < 19 * 60) { let previousTimeOfDay = timeOfDay;
tod = "dawn"; let remainingDuration = timeDuration;
} else if (m < 20 * 60) { let x = BUS_FRONT_OFFSET;
tod = "dusk"; while (remainingDuration > 0) {
const nextTimeOfDay = nextPhase(previousTimeOfDay);
const nextStartTime = phaseStartTime(nextTimeOfDay);
let thisDuration = nextStartTime - previousTime;
if (thisDuration < 0) {
thisDuration += 1440;
}
// TODO Figure out scaling factor
const pixelWidth = thisDuration * 3;
drawBackground(context, previousTimeOfDay, x, pixelWidth);
remainingDuration -= thisDuration;
previousTime = nextStartTime;
previousTimeOfDay = nextTimeOfDay;
x += pixelWidth;
}
x = BUS_FRONT_OFFSET;
const currentPointProgress = distance % 360;
let distanceToNextPoint;
if (currentPointProgress <= 109.3) {
distanceToNextPoint = 109.3 - currentPointProgress;
} else { } else {
tod = "night"; distanceToNextPoint = 469.3 - currentPointProgress;
}
// TODO Figure out scaling factor
x += distanceToNextPoint * 4;
const pointImage = new Image();
pointImage.src = "point.png";
context.drawImage(pointImage, x - POINT_OFFSET, 0);
while (x < maxWidth) {
// TODO Figure out scaling factor
x += 360 * 4;
context.drawImage(pointImage, x - POINT_OFFSET, 0);
}
const distanceOnRoute = (distance - 109.3) % 360;
const busStopImage = new Image();
busStopImage.src = "db_stop.png";
// TODO Figure out scaling factor
let distanceTracked = distanceOnRoute - BUS_FRONT_OFFSET / 4;
if (distanceTracked < 0) {
distanceTracked += 720;
}
x = 0;
while (x < 1920) {
const distanceTrackedOnRoute = distanceTracked % 360;
let nextBusStopPosition = null;
for (const busStopPosition of BUS_STOP_POSITIONS) {
if (busStopPosition >= distanceTrackedOnRoute + 1) {
nextBusStopPosition = busStopPosition;
break;
}
} }
setSky(tod, m); if (nextBusStopPosition === null) {
nextBusStopPosition = 360 + BUS_STOP_POSITIONS[0];
} }
}, interval); const nextBusStopDistance = nextBusStopPosition - distanceTrackedOnRoute;
} else { distanceTracked += nextBusStopDistance;
// Do first update immediately, then every UPDATE_INTERVAL_MS // TODO Figure out scaling factor
setInterval(update, UPDATE_INTERVAL_MS); x += nextBusStopDistance * 4;
update(); context.drawImage(busStopImage, x - BUS_STOP_OFFSET, 0);
}
const busImage = new Image();
if (timeOfDay === "night") {
busImage.src = "bus_night.png";
} else {
busImage.src = "bus_day.png";
}
context.drawImage(busImage, 0, 0);
} }
window.addEventListener("DOMContentLoaded", (event) => {
drawRoad();
setInterval(drawRoad, 10000);
});

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thrimbletrimmer/driveclock/point.png
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thrimbletrimmer/driveclock/stops.png
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