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Add stats overlay with graph #7

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ae6da2e
Add stats modal with generation graph
MathomJohnson Jun 16, 2025
a34a72e
Fix stats overlay layout
MathomJohnson Jun 16, 2025
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7 changes: 6 additions & 1 deletion helpers/SimulationManager.js
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Original file line number Diff line number Diff line change
Expand Up @@ -2,13 +2,14 @@ import { Car } from "../classes/Car.js";
import { NeuralNetwork } from "../classes/NeuralNetwork.js";

export class SimulationManager {
constructor(canvas, obstacleManager, populationSize, eliteCount, speed, mutationRate) {
constructor(canvas, obstacleManager, populationSize, eliteCount, speed, mutationRate, onGenerationComplete = () => {}) {
this.canvas = canvas;
this.obstacleManager = obstacleManager;
this.populationSize = populationSize;
this.eliteCount = eliteCount;
this.speed = speed;
this.mutationRate = mutationRate;
this.onGenerationComplete = onGenerationComplete;

this.generation = 1; // keep track of generations
this.CAR_WIDTH = 30;
Expand Down Expand Up @@ -137,6 +138,10 @@ export class SimulationManager {
console.log(`Distance: ${Math.floor(this.distanceTraveled)}`);
elites[0].brain.printNetwork();

if (this.onGenerationComplete) {
this.onGenerationComplete(this.generation, this.distanceTraveled);
}

const newCars = [];
const nextGen = this.generation + 1;

Expand Down
8 changes: 7 additions & 1 deletion index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,13 @@
<link rel="stylesheet" href="style.css" />
</head>
<body>
<canvas id="canvas"></canvas>
<div id="game-container">
<button id="stats-btn">Stats</button>
<div id="stats-modal">
<canvas id="stats-canvas" width="400" height="300"></canvas>
</div>
<canvas id="canvas"></canvas>
</div>
<script type="module" src="main.js"></script>
</body>
</html>
67 changes: 65 additions & 2 deletions main.js
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,62 @@ canvas.width = 600;
canvas.height = 800;
const ctx = canvas.getContext("2d");

const statsBtn = document.getElementById('stats-btn');
const statsModal = document.getElementById('stats-modal');
const statsCanvas = document.getElementById('stats-canvas');
const statsCtx = statsCanvas.getContext('2d');
const statsData = [];

function drawStatsGraph() {
statsCtx.clearRect(0, 0, statsCanvas.width, statsCanvas.height);
if (statsData.length === 0) return;

const padding = 30;
const maxGen = Math.max(...statsData.map(d => d.generation));
const maxDist = Math.max(...statsData.map(d => d.distance));

statsCtx.strokeStyle = '#fff';
statsCtx.beginPath();
statsCtx.moveTo(padding, padding);
statsCtx.lineTo(padding, statsCanvas.height - padding);
statsCtx.lineTo(statsCanvas.width - padding, statsCanvas.height - padding);
statsCtx.stroke();

statsCtx.fillStyle = '#fff';
statsCtx.font = '12px monospace';
statsCtx.textAlign = 'center';
statsCtx.fillText('Generation', statsCanvas.width / 2, statsCanvas.height - 10);
statsCtx.save();
statsCtx.translate(10, statsCanvas.height / 2);
statsCtx.rotate(-Math.PI / 2);
statsCtx.fillText('Distance', 0, 0);
statsCtx.restore();

statsCtx.strokeStyle = 'cyan';
statsCtx.beginPath();
statsData.forEach((d, i) => {
const x = padding + ((d.generation - 1) / Math.max(1, maxGen - 1)) * (statsCanvas.width - 2 * padding);
const y = (statsCanvas.height - padding) - (d.distance / Math.max(1, maxDist)) * (statsCanvas.height - 2 * padding);
if (i === 0) statsCtx.moveTo(x, y); else statsCtx.lineTo(x, y);
});
statsCtx.stroke();
}

function handleGenerationComplete(gen, dist) {
statsData.push({ generation: gen, distance: dist });
drawStatsGraph();
}

statsBtn.addEventListener('click', () => {
const visible = statsModal.style.display === 'flex';
statsModal.style.display = visible ? 'none' : 'flex';
if (!visible) drawStatsGraph();
});

statsModal.addEventListener('click', (e) => {
if (e.target === statsModal) statsModal.style.display = 'none';
});

// Initialize road lines
initRoadLines(canvas.height);

Expand All @@ -22,8 +78,15 @@ const POPULATION_SIZE = 75;
const PARENT_COUNT = 10;
const MUTATION_RATE = 0.2;

const simManager = new SimulationManager(canvas, new ObstacleManager(canvas, NUM_OBSTACLES, SPEED),
POPULATION_SIZE, PARENT_COUNT, SPEED, MUTATION_RATE);
const simManager = new SimulationManager(
canvas,
new ObstacleManager(canvas, NUM_OBSTACLES, SPEED),
POPULATION_SIZE,
PARENT_COUNT,
SPEED,
MUTATION_RATE,
handleGenerationComplete
);

// Animation loop
function animate() {
Expand Down
44 changes: 39 additions & 5 deletions style.css
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Original file line number Diff line number Diff line change
@@ -1,12 +1,46 @@

body {
margin: 0;
background: #111;
overflow: hidden;
}
margin: 0;
background: #111;
overflow: hidden;
display: flex;
justify-content: center;
}

#game-container {
position: relative;
width: fit-content;
}

canvas {
display: block;
margin: 0 auto;
background: #222;
}


#stats-btn {
position: absolute;
top: 10px;
right: 10px;
padding: 6px 12px;
z-index: 2;
}

#stats-modal {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
display: none;
background: rgba(0, 0, 0, 0.6);
align-items: center;
justify-content: center;
z-index: 3;
}

#stats-modal canvas {
background: #333;
border: 1px solid #555;
}