Psico/blackhole.html at main · ivansouza/Psico · GitHub

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<!DOCTYPE html>
<html lang="pt-BR">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Neon Fibonacci Interativo</title>
    <style>
        body {
            margin: 0;
            background-color: #000;
            overflow: hidden;
            font-family: 'Segoe UI', monospace;
            color: white;
        }
        canvas {
            display: block;
        }

        /* Estilo do Overlay de Controles */
        #controls {
            position: fixed;
            bottom: 20px;
            right: 20px;
            width: 280px;
            padding: 20px;
            background: rgba(20, 20, 20, 0.85);
            backdrop-filter: blur(10px); /* Efeito de vidro fosco */
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            box-shadow: 0 4px 20px rgba(0,0,0,0.5);
            z-index: 100;
        }

        .control-group {
            margin-bottom: 20px;
        }

        /* Remove margem do último grupo para alinhar com botão */
        .control-group:last-of-type {
            margin-bottom: 20px;
        }

        label {
            display: flex;
            justify-content: space-between;
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 8px;
            color: #aaa;
        }

        span.value {
            color: #fff;
            font-weight: bold;
        }

        input[type=range] {
            width: 100%;
            -webkit-appearance: none;
            background: transparent;
        }

        /* Estilizando o trilho do slider */
        input[type=range]::-webkit-slider-runnable-track {
            width: 100%;
            height: 4px;
            background: rgba(255, 255, 255, 0.2);
            border-radius: 2px;
            cursor: pointer;
        }

        /* Estilizando a bolinha do slider */
        input[type=range]::-webkit-slider-thumb {
            -webkit-appearance: none;
            height: 16px;
            width: 16px;
            border-radius: 50%;
            background: #fff;
            margin-top: -6px;
            cursor: pointer;
            box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
            transition: transform 0.1s;
        }

        input[type=range]:hover::-webkit-slider-thumb {
            transform: scale(1.2);
        }

        input[type=range]:focus {
            outline: none;
        }

        /* Botão de Restart Estilizado */
        .btn-restart {
            width: 100%;
            padding: 12px;
            background: rgba(255, 255, 255, 0.1); /* Fundo sutil */
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: white;
            border-radius: 8px;
            font-family: inherit;
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 1px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .btn-restart:hover {
            background: rgba(255, 255, 255, 0.25);
            border-color: rgba(255, 255, 255, 0.5);
            box-shadow: 0 0 15px rgba(255, 255, 255, 0.1);
        }

        .btn-restart:active {
            transform: scale(0.98);
        }
    </style>
</head>
<body>

    <!-- Overlay de Controles -->
    <div id="controls">
        <div class="control-group">
            <label>
                Velocidade Fluxo
                <span id="val-speed" class="value">0.5</span>
            </label>
            <input type="range" id="input-speed" min="0" max="2.0" step="0.1" value="0.5">
        </div>

        <div class="control-group">
            <label>
                Abertura (Spread)
                <span id="val-spread" class="value">12</span>
            </label>
            <input type="range" id="input-spread" min="4" max="30" step="0.5" value="12">
        </div>

        <button id="btn-restart" class="btn-restart">
            Reiniciar Animação
        </button>
    </div>

    <canvas id="canvas"></canvas>

    <script>
        const canvas = document.getElementById('canvas');
        const ctx = canvas.getContext('2d');

        // Referências UI
        const inputSpeed = document.getElementById('input-speed');
        const valSpeed = document.getElementById('val-speed');
        const inputSpread = document.getElementById('input-spread');
        const valSpread = document.getElementById('val-spread');
        const btnRestart = document.getElementById('btn-restart');

        let width, height, centerX, centerY;

        // --- PARÂMETROS PADRÃO ---
        const ANGLE_STEP = 137.507764 * (Math.PI / 180);
        const TOTAL_POINTS = 700;

        // Variáveis dinâmicas controladas pelos sliders
        let spread = 12;
        let zoomSpeed = 0.5;

        // Estado da animação
        let startFrame = 0;
        let rotation = 0;

        // Atualiza valores quando sliders mudam
        inputSpeed.addEventListener('input', (e) => {
            zoomSpeed = parseFloat(e.target.value);
            valSpeed.textContent = zoomSpeed.toFixed(1);
        });

        inputSpread.addEventListener('input', (e) => {
            spread = parseFloat(e.target.value);
            valSpread.textContent = spread.toFixed(1);
        });

        // Lógica do Botão Restart
        btnRestart.addEventListener('click', () => {
            startFrame = 0; // Volta para o início do túnel
            rotation = 0;   // Reseta o ângulo
            // Nota: Não resetamos os sliders para manter a preferência do usuário
        });

        function resize() {
            width = window.innerWidth;
            height = window.innerHeight;
            canvas.width = width;
            canvas.height = height;
            centerX = width / 2;
            centerY = height / 2;
        }

        window.addEventListener('resize', resize);
        resize();

        function draw() {
            // Limpeza total para contraste máximo
            ctx.fillStyle = '#000000';
            ctx.fillRect(0, 0, width, height);

            // Atualiza o frame baseado na velocidade do slider
            startFrame += zoomSpeed;

            // Rotação constante (independente da velocidade do fluxo)
            rotation += 0.002;

            for (let i = 0; i < TOTAL_POINTS; i++) {
                const n = startFrame + i;

                // spread vem do slider agora
                const r = spread * Math.sqrt(n);
                const theta = n * ANGLE_STEP + rotation;

                const x = centerX + r * Math.cos(theta);
                const y = centerY + r * Math.sin(theta);

                // Otimização de renderização
                const distSq = (x - centerX) ** 2 + (y - centerY) ** 2;
                if (distSq > (Math.max(width, height)/1.1) ** 2) continue;

                // Tamanho dinâmico
                let size = Math.sqrt(n) * (spread * 0.04);
                if (size < 0.6) size = 0.6;
                if (size > 15) size = 15;

                // Cor HSL
                const hue = (n * 2) % 360;

                ctx.beginPath();
                ctx.arc(x, y, size, 0, Math.PI * 2);
                ctx.fillStyle = `hsl(${hue}, 90%, 60%)`;
                ctx.fill();
            }

            requestAnimationFrame(draw);
        }

        draw();

    </script>
</body>
</html>