SandGame/fire.js

import { grid, cols, rows } from './state.js';
import { config } from './config.js';
import { move } from './actions.js';

export function updateFire(x, y, cell) {
    // Check lifespan
    if (cell.lifespan !== undefined) {
        cell.lifespan--;
        if (cell.lifespan <= 0) {
            grid[x][y] = null;
            return;
        }
    } else if (Math.random() < config.fire.burnChance) {
        grid[x][y] = null;
        return;
    }

    // Extinguish if trapped
    let trapped = true;
    const checkNeighbors = [[0, 1], [0, -1], [1, 0], [-1, 0]];
    for (let n of checkNeighbors) {
        const nx = x + n[0], ny = y + n[1];
        if (nx >= 0 && nx < cols && ny >= 0 && ny < rows) {
            if (!grid[nx][ny] || grid[nx][ny].type === 'wood' || grid[nx][ny].type === 'plant' || grid[nx][ny].type === 'explosive') {
                trapped = false;
                break;
            }
        }
    }
    if (trapped) {
        grid[x][y] = null;
        return;
    }

    // Interact with neighbors
    const neighbors = [[0, 1], [0, -1], [1, 0], [-1, 0]];
    for (let n of neighbors) {
        const nx = x + n[0], ny = y + n[1];
        if (nx >= 0 && nx < cols && ny >= 0 && ny < rows && grid[nx][ny]) {
            if (grid[nx][ny].type === 'water') {
                grid[x][y] = null; // Extinguished
                grid[nx][ny] = { type: 'steam', color: '#E0FFFF', updated: true };
                return;
            }
            if (grid[nx][ny].type === 'plant') {
                if (Math.random() < config.plant.burnChance) {
                    grid[nx][ny] = { type: 'fire', color: '#FF5500', updated: true };
                }
            }
            if (grid[nx][ny].type === 'wood') {
                if (Math.random() < config.wood.burnChance) {
                    grid[nx][ny] = { type: 'fire', color: '#FF5500', updated: true };
                }
            }
        }
    }

    // Move randomly (rise)
    const dx = Math.floor(Math.random() * 3) - 1;
    const dy = Math.floor(Math.random() * 2) - 1;
    const nx = x + dx, ny = y + dy;
    if (nx >= 0 && nx < cols && ny >= 0 && ny < rows && !grid[nx][ny]) move(x, y, nx, ny);
}