Slither.io Enhancer (Background + Zoom Control + FPS Counter)

Adds background color changer, zoom controls, and a rainbow FPS counter to slither.io
当前为 2025-06-04 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name         Slither.io Enhancer (Background + Zoom Control + FPS Counter)
// @namespace    http://tampermonkey.net/
// @version      3.1
// @description  Adds background color changer, zoom controls, and a rainbow FPS counter to slither.io
// @author       Jadob Lane
// @match        http://slither.com/io
// @grant        none
// @license      MIT
// ==/UserScript==

(function() {
    'use strict';

    // ===== Background Color Changer =====
    function createBackgroundChanger() {
        const colors = {
            Default: '#1a1a1a',
            Light: '#f0f0f0',
            Navy: '#001f3f',
            Green: '#2ecc40',
            Purple: '#7f00ff',
            Pink: '#ff69b4',
            Cyan: '#00ffff',
            Red: '#ff4136',
            Orange: '#ff851b',
            Yellow: '#ffdc00',
            Lime: '#01ff70',
            Teal: '#39cccc',
            Indigo: '#4b0082',
            Brown: '#8b4513',
            Gray: '#aaaaaa',
            Blue: '#00008B',
        };

        const container = document.createElement('div');
        container.style.position = 'fixed';
        container.style.top = '10px';
        container.style.left = '10px';
        container.style.zIndex = '9999';
        container.style.background = 'rgba(0, 0, 0, 0.6)';
        container.style.padding = '8px';
        container.style.borderRadius = '5px';
        container.style.color = '#fff';
        container.style.fontFamily = 'Arial, sans-serif';
        container.style.fontSize = '14px';

        const label = document.createElement('label');
        label.textContent = 'Background: ';
        label.style.marginRight = '5px';

        const select = document.createElement('select');
        for (let name in colors) {
            const option = document.createElement('option');
            option.value = colors[name];
            option.textContent = name;
            select.appendChild(option);
        }

        select.addEventListener('change', function() {
            document.body.style.backgroundColor = select.value;
        });

        container.appendChild(label);
        container.appendChild(select);
        document.body.appendChild(container);

        select.addEventListener('keydown', function(event) {
            if (event.key === ' ' || event.keyCode === 32) {
                event.preventDefault();
            }
        });
    }

    // ===== Zoom Control =====
    window.logDebugging = false;
    window.log = function() {
        if (window.logDebugging) {
            console.log.apply(console, arguments);
        }
    };

    window.zoomMultiplier = 1.0;

    window.updateZoom = function() {
        window.gsc = window.zoomMultiplier;
        const zoomOverlay = document.getElementById("zoom_overlay");
        if (zoomOverlay) {
            zoomOverlay.innerHTML = `Press (8/9) to change zoom: ${window.zoomMultiplier.toFixed(1)}`;
        }
    };

    window.recursiveZoomUpdate = function() {
        window.gsc = window.zoomMultiplier;
        requestAnimationFrame(window.recursiveZoomUpdate);
    };

    window.resetZoom = function() {
        window.zoomMultiplier = 1.0;
        window.updateZoom();
    };

    window.adjustZoom = function(amount) {
        window.zoomMultiplier = Math.max(0.2, Math.min(3.0, window.zoomMultiplier + amount));
        window.updateZoom();
    };

    document.oldKeyDown = document.onkeydown;
    document.onkeydown = function(e) {
        if (typeof document.oldKeyDown === "function") {
            document.oldKeyDown(e);
        }

        if (document.activeElement?.parentElement !== window.nick_holder) {
            if (e.keyCode === 57) {       // Key "9"
                window.adjustZoom(0.1);
            } else if (e.keyCode === 56) { // Key "8"
                window.adjustZoom(-0.1);
            } else if (e.keyCode === 49) { // Key "1"
                window.resetZoom();
            }
        }
    };

    window.initZoomOverlay = function() {
        let overlay = document.createElement("div");
        overlay.id = "zoom_overlay";
        overlay.style = "color: #FFF; font-family: Arial, sans-serif; font-size: 18px; position: fixed; left: 30px; top: 65px; z-index: 1000;";
        overlay.innerHTML = "Press (8/9) to change zoom: " + window.zoomMultiplier.toFixed(1);
        document.body.appendChild(overlay);
    };

    // ===== Initialize Everything After Page Load =====
    window.addEventListener('load', function() {
        createBackgroundChanger();
        window.initZoomOverlay();
        window.updateZoom();
        window.recursiveZoomUpdate();

        // ===== Rainbow FPS Counter =====
        const fpsDisplay = document.createElement('div');
        fpsDisplay.style.position = 'fixed';
        fpsDisplay.style.top = '10px';
        fpsDisplay.style.right = '10px';
        fpsDisplay.style.zIndex = '10000';
        fpsDisplay.style.fontFamily = 'Arial, sans-serif';
        fpsDisplay.style.fontSize = '16px';
        fpsDisplay.style.fontWeight = 'bold';
        fpsDisplay.style.padding = '5px 10px';
        fpsDisplay.style.borderRadius = '5px';
        fpsDisplay.style.background = 'rgba(0, 0, 0, 0.5)';
        document.body.appendChild(fpsDisplay);

        let lastFrameTime = performance.now();
        let frames = 0;
        let fps = 0;
        let hue = 0;

        function updateFPS() {
            const now = performance.now();
            frames++;
            if (now - lastFrameTime >= 1000) {
                fps = frames;
                frames = 0;
                lastFrameTime = now;
            }

            hue = (hue + 1) % 360;
            fpsDisplay.style.color = `hsl(${hue}, 100%, 60%)`;
            fpsDisplay.textContent = `FPS: ${fps}`;

            requestAnimationFrame(updateFPS);
        }

        requestAnimationFrame(updateFPS);
    });
})();
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