<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>RE System Cellular Automata</title>
<style>
body {
font-family: Arial, sans-serif;
display: flex;
flex-direction: column;
align-items: center;
padding: 20px;
}
canvas {
border: 1px solid black;
cursor: grab;
}
#controls {
margin-top: 10px;
display: flex;
flex-wrap: wrap;
gap: 10px;
justify-content: center;
}
button,
select {
padding: 5px 10px;
font-size: 14px;
}
label {
display: flex;
align-items: center;
gap: 5px;
}
</style>
</head>
<body>
<h1>RE System Cellular Automata</h1>
<canvas id="caCanvas" width="1000" height="1000"></canvas>
<div id="controls">
<button id="nextGen">Next Generation</button>
<button id="startStop">Start/Stop</button>
<button id="backGen">Back a Generation</button>
<select id="cellType">
<option value="0">Dead</option>
<option value="1">Alive</option>
<option value="2">Critical</option>
</select>
<button id="reset">Reset</button>
<button id="clear">Clear</button>
<label for="cellSize">Cell Size:</label>
<input type="range" id="cellSize" min="1" max="50" value="5" />
<label for="deadColor">Dead Color:</label>
<input type="color" id="deadColor" value="#000000" />
<label for="aliveColor">Alive Color:</label>
<input type="color" id="aliveColor" value="#00ff00" />
<label for="criticalColor">Critical Color:</label>
<input type="color" id="criticalColor" value="#ff0000" />
</div>
<script>
class CellularAutomata {
constructor(size) {
this.size = size
this.grid = Array(size)
.fill()
.map(() => Array(size).fill(0))
this.nextGrid = Array(size)
.fill()
.map(() => Array(size).fill(0))
this.history = [] // Store past grids
}
initializeRandom() {
for (let i = 0; i < this.size; i++) {
for (let j = 0; j < this.size; j++) {
const rand = Math.random()
if (rand < 0.1)
this.grid[i][j] = 2 // Critical
else if (rand < 0.2)
this.grid[i][j] = 1 // Alive
else this.grid[i][j] = 0 // Dead
}
}
}
clear() {
for (let i = 0; i < this.size; i++) {
for (let j = 0; j < this.size; j++) {
this.grid[i][j] = 0 // Set all cells to Dead
}
}
}
countNeighbors(i, j) {
let count = 0
for (let di = -1; di <= 1; di++) {
for (let dj = -1; dj <= 1; dj++) {
if (di === 0 && dj === 0) continue
const ni = i + di,
nj = j + dj
if (ni >= 0 && ni < this.size && nj >= 0 && nj < this.size) {
count += this.grid[ni][nj] > 0 ? 1 : 0
}
}
}
return count
}
update() {
// Save current grid state to history before updating
this.history.push(this.grid.map((row) => row.slice()))
for (let i = 0; i < this.size; i++) {
for (let j = 0; j < this.size; j++) {
const neighbors = this.countNeighbors(i, j)
const currentState = this.grid[i][j]
if (currentState === 0) {
this.nextGrid[i][j] = neighbors === 3 ? 1 : 0 // Dead
} else if (currentState === 1) {
this.nextGrid[i][j] = neighbors >= 2 && neighbors <= 3 ? 1 : 2 // Alive
} else {
this.nextGrid[i][j] = neighbors === 1 || neighbors >= 4 ? 0 : 2 // Critical
}
}
}
;[this.grid, this.nextGrid] = [this.nextGrid, this.grid]
}
setCell(i, j, state) {
this.grid[i][j] = state
}
backGeneration() {
if (this.history.length > 0) {
this.grid = this.history.pop() // Revert to the previous generation
}
}
}
const canvas = document.getElementById("caCanvas")
const ctx = canvas.getContext("2d")
const offset = { x: 0, y: 0 }
let cellSize = parseInt(document.getElementById("cellSize").value)
let isRunning = false
let animationId = null
let ca = new CellularAutomata(200) // Increased grid size for infinite effect
ca.initializeRandom()
function drawGrid() {
ctx.clearRect(0, 0, canvas.width, canvas.height) // Clear the canvas
for (let i = 0; i < ca.size; i++) {
for (let j = 0; j < ca.size; j++) {
const cellState = ca.grid[i][j]
ctx.fillStyle =
cellState === 0
? document.getElementById("deadColor").value // Use customizable dead cell color
: cellState === 1
? document.getElementById("aliveColor").value
: document.getElementById("criticalColor").value
ctx.fillRect(
i * cellSize + offset.x,
j * cellSize + offset.y,
cellSize,
cellSize,
)
// Draw the grid lines
ctx.strokeStyle = 'lightgray'; // Grid line color
ctx.lineWidth = 1; // Grid line thickness
ctx.strokeRect(
i * cellSize + offset.x,
j * cellSize + offset.y,
cellSize,
cellSize
);
}
}
}
function animate() {
ca.update()
drawGrid()
if (isRunning) {
animationId = requestAnimationFrame(animate)
}
}
function startStop() {
isRunning = !isRunning
if (isRunning) {
animate()
} else {
cancelAnimationFrame(animationId)
}
}
function nextGeneration() {
ca.update()
drawGrid()
}
function reset() {
ca = new CellularAutomata(200) // Reset grid size
ca.initializeRandom()
drawGrid()
if (isRunning) {
cancelAnimationFrame(animationId)
isRunning = false
}
}
function clear() {
ca.clear()
drawGrid()
if (isRunning) {
cancelAnimationFrame(animationId)
isRunning = false
}
}
function backGeneration() {
ca.backGeneration()
drawGrid()
}
let placementIndicator = { x: -1, y: -1 } // Track where the cell will be placed
canvas.addEventListener("mousemove", (event) => {
const rect = canvas.getBoundingClientRect()
const x = Math.floor((event.clientX - rect.left - offset.x) / cellSize)
const y = Math.floor((event.clientY - rect.top - offset.y) / cellSize)
if (x >= 0 && x < ca.size && y >= 0 && y < ca.size) {
placementIndicator.x = x
placementIndicator.y = y
}
drawGrid()
// Draw placement indicator
if (placementIndicator.x !== -1 && placementIndicator.y !== -1) {
ctx.strokeStyle = "yellow" // Indicator color
ctx.lineWidth = 1
ctx.strokeRect(
placementIndicator.x * cellSize + offset.x,
placementIndicator.y * cellSize + offset.y,
cellSize,
cellSize,
)
}
})
canvas.addEventListener("click", (event) => {
const rect = canvas.getBoundingClientRect()
const x = Math.floor((event.clientX - rect.left - offset.x) / cellSize)
const y = Math.floor((event.clientY - rect.top - offset.y) / cellSize)
const state = parseInt(document.getElementById("cellType").value)
if (x >= 0 && x < ca.size && y >= 0 && y < ca.size) {
ca.setCell(x, y, state)
drawGrid()
}
})
document.getElementById("nextGen").addEventListener("click", nextGeneration)
document.getElementById("startStop").addEventListener("click", startStop)
document.getElementById("backGen").addEventListener("click", backGeneration)
document.getElementById("reset").addEventListener("click", reset)
document.getElementById("clear").addEventListener("click", clear)
document.getElementById("cellSize").addEventListener("input", (event) => {
cellSize = parseInt(event.target.value)
drawGrid()
})
// Panning Logic
let isDragging = false
let startDragOffset = { x: 0, y: 0 }
let lastMousePosition = { x: 0, y: 0 }
canvas.addEventListener("mousedown", (event) => {
isDragging = true
lastMousePosition.x = event.clientX
lastMousePosition.y = event.clientY
canvas.style.cursor = "grabbing"
})
canvas.addEventListener("mouseup", () => {
isDragging = false
canvas.style.cursor = "grab"
})
canvas.addEventListener("mousemove", (event) => {
if (isDragging) {
const dx = event.clientX - lastMousePosition.x
const dy = event.clientY - lastMousePosition.y
offset.x += dx
offset.y += dy
lastMousePosition.x = event.clientX
lastMousePosition.y = event.clientY
drawGrid()
}
})
canvas.addEventListener("wheel", (event) => {
event.preventDefault()
const zoomFactor = 0.1
cellSize += event.deltaY < 0 ? -zoomFactor * cellSize : zoomFactor * cellSize
cellSize = Math.max(1, Math.min(cellSize, 50)) // Limit cell size for usability
drawGrid()
})
drawGrid()
</script>
</body>
</html>
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