液态文本效果 - WebGL 悬停动画，HTML代码在线实时编辑、实时预览

index.html

style.css

index.js

index.html

            
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            <!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <link rel="stylesheet" href="./style.css">
  <script src="./index.js"></script>
</head>

<body>
  <div class="container">
      <canvas id="glcanvas" width="1000" height="400"></canvas>
  </div>
</body>

</html>

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style.css

            
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            html,body {
    height: 100%;
    margin: 0;
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: Arial,sans-serif
}
canvas{
    max-width: 100%;
    height: auto;
    display: block;
    cursor: pointer;
    transition: transform 0.3s ease
}
canvas:hover {                       
    transform:scale(1.05); 
}

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index.js

            
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            const canvas = document.getElementById('glcanvas');
const gl = canvas.getContext('webgl');
if(!gl){alert('WebGL no soportado');}

let mouseX = 0;
let mouseY = 0;
let isHovering = false;

// Variables para el efecto hover
canvas.addEventListener('mousemove', (e) => {
    const rect = canvas.getBoundingClientRect();
    mouseX = (e.clientX - rect.left) / rect.width;
    mouseY = 1.0 - (e.clientY - rect.top) / rect.height; // Invertir Y
    isHovering = true;
});

canvas.addEventListener('mouseleave', () => {
    isHovering = false;
});

function compileShader(src, type){
    const s = gl.createShader(type);
    gl.shaderSource(s, src);
    gl.compileShader(s);
    if(!gl.getShaderParameter(s, gl.COMPILE_STATUS)){
        console.error(gl.getShaderInfoLog(s));
    }
    return s;
}

const vertexShaderSource = `
attribute vec2 a_pos;
attribute vec2 a_uv;
varying vec2 v_uv;
void main(){
    v_uv = a_uv;
    gl_Position = vec4(a_pos,0.0,1.0);
}`;

const fragmentShaderSource = `
precision highp float;
varying vec2 v_uv;
uniform sampler2D u_text;
uniform float u_time;
uniform vec2 u_mouse;
uniform float u_hover;

float random(vec2 st){return fract(sin(dot(st.xy,vec2(12.9898,78.233)))*43758.5453123);}  
float noise(vec2 st){
    vec2 i = floor(st);
    vec2 f = fract(st);
    float a = random(i);
    float b = random(i+vec2(1.0,0.0));
    float c = random(i+vec2(0.0,1.0));
    float d = random(i+vec2(1.0,1.0));
    vec2 u = f*f*(3.0-2.0*f);
    return mix(a,b,u.x)+(c-a)*u.y*(1.0-u.x)+(d-b)*u.x*u.y;
}

void main(){
// Corregir coordenadas UV para que el texto no esté al revés
vec2 correctedUV = vec2(v_uv.x, 1.0 - v_uv.y);

// Efecto de derretimiento base
float strength = smoothstep(0.2,1.0,correctedUV.y);
float n = noise(vec2(correctedUV.x*5.0,(correctedUV.y*2.0 - u_time*0.6)*2.0));
float melt = n*0.4*(correctedUV.y); // Cambiar para que se derrita desde arriba

// Efecto hover controlado - ondas suaves y elegantes
float dist = distance(correctedUV, u_mouse);
float hoverWave1 = sin(dist * 12.0 - u_time * 6.0) * 0.08 * u_hover * exp(-dist * 3.5);
float hoverWave2 = sin(dist * 20.0 - u_time * 10.0) * 0.04 * u_hover * exp(-dist * 5.0);
float hoverWave = hoverWave1 + hoverWave2;

// Efecto de distorsión magnética controlado
vec2 hoverDistort = normalize(correctedUV - u_mouse) * hoverWave * (1.0 + sin(u_time * 2.0) * 0.1);

// Combinar efectos
vec2 finalUV = vec2(
    correctedUV.x + melt*0.3 + hoverDistort.x, 
    correctedUV.y - melt*0.8 + hoverDistort.y
);

vec4 col = texture2D(u_text, finalUV);

// Efecto de brillo base con colores tipo espectro
if(col.a > 0.1){
    float glow = smoothstep(0.5,1.0,col.a);
    vec3 spectrumColor = vec3(
        correctedUV.y, 
        abs(sin(u_time + correctedUV.x * 5.0)), 
        1.0 - correctedUV.y
    );

    // Efecto hover controlado - colores suaves y elegantes
    if(u_hover > 0.1){
        float hoverIntensity = 1.0 - smoothstep(0.0, 0.3, dist);
        float pulseEffect = 0.7 + 0.3 * sin(u_time * 4.0 + dist * 8.0);

        // Efecto de color dorado suave
        vec3 goldColor = vec3(
            0.9, 
            0.6 + 0.3 * pulseEffect,
            0.2 + 0.2 * sin(u_time * 3.0)
        );

        // Efecto de color azul elegante
        vec3 blueColor = vec3(
            0.3 + 0.4 * sin(u_time * 2.0 + dist * 6.0),
            0.6 + 0.3 * pulseEffect,
            0.9
        );

        spectrumColor = mix(spectrumColor, mix(goldColor, blueColor, 0.5), hoverIntensity * u_hover * 0.8);
        glow += hoverIntensity * u_hover * 0.8;
    }

    col.rgb = mix(col.rgb, spectrumColor, 0.6 * glow);

    // Efecto de partículas controlado en hover
    if(u_hover > 0.1){
        // Partículas suaves y elegantes
        float particles = noise(correctedUV * 15.0 + u_time * 2.0);

        if(particles > 0.85 && dist < 0.2){
            col.rgb += vec3(1.0, 0.8, 0.4) * (particles - 0.85) * 8.0 * u_hover;
        }

        // Efecto de brillo sutil
        float sparkles = noise(correctedUV * 30.0 + u_time * 4.0);
        if(sparkles > 0.92 && dist < 0.15){
            col.rgb += vec3(0.9, 0.9, 1.0) * (sparkles - 0.92) * 6.0 * u_hover;
        }
    }
}

// Efecto de iluminación ambiental controlado en hover
if(u_hover > 0.1){
    float ambientGlow = 1.0 - smoothstep(0.0, 0.4, dist);
    float auraEffect = sin(dist * 6.0 - u_time * 3.0) * 0.2 + 0.8;

    // Aura suave y elegante
    vec3 auraColor = vec3(
    0.15 + 0.1 * sin(u_time * 1.5),
    0.1 + 0.1 * sin(u_time * 2.0 + 1.0),
    0.2 + 0.15 * sin(u_time * 1.2 + 2.0)
    );

    col.rgb += auraColor * ambientGlow * u_hover * auraEffect;

    // Efecto de halo exterior sutil
    float outerHalo = 1.0 - smoothstep(0.2, 0.5, dist);
    col.rgb += vec3(0.08, 0.04, 0.12) * outerHalo * u_hover * 0.3;
}

gl_FragColor = col;
}`;

const vs = compileShader(vertexShaderSource, gl.VERTEX_SHADER);
const fs = compileShader(fragmentShaderSource, gl.FRAGMENT_SHADER);
const program = gl.createProgram();
gl.attachShader(program, vs);
gl.attachShader(program, fs);
gl.linkProgram(program);

const quad = new Float32Array([
    -1, -1, 0, 0,
    1, -1, 1, 0,
    -1,  1, 0, 1,
    1,  1, 1, 1
]);
const buf = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, buf);
gl.bufferData(gl.ARRAY_BUFFER, quad, gl.STATIC_DRAW);

const a_pos = gl.getAttribLocation(program, 'a_pos');
const a_uv = gl.getAttribLocation(program, 'a_uv');

gl.enableVertexAttribArray(a_pos);
gl.vertexAttribPointer(a_pos, 2, gl.FLOAT, false, 16, 0);
gl.enableVertexAttribArray(a_uv);
gl.vertexAttribPointer(a_uv, 2, gl.FLOAT, false, 16, 8);

const u_time = gl.getUniformLocation(program, 'u_time');
const u_text = gl.getUniformLocation(program, 'u_text');
const u_mouse = gl.getUniformLocation(program, 'u_mouse');
const u_hover = gl.getUniformLocation(program, 'u_hover');

const textCanvas = document.createElement('canvas');
const tctx = textCanvas.getContext('2d');
textCanvas.width = 1200;
textCanvas.height = 400;
tctx.fillStyle = '#fff';
tctx.font = 'bold 200px Arial';
tctx.textAlign = 'center';
tctx.textBaseline = 'middle';
tctx.fillText('笔.COOL', textCanvas.width / 2, textCanvas.height / 2);

const textTex = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, textTex);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, textCanvas);

// Suavizar la transición del hover
let hoverValue = 0;
const hoverSpeed = 0.05;

function draw(t){
    // Suavizar el efecto hover
    if(isHovering && hoverValue < 1.0){
        hoverValue = Math.min(1.0, hoverValue + hoverSpeed);
    } else if(!isHovering && hoverValue > 0.0){
        hoverValue = Math.max(0.0, hoverValue - hoverSpeed);
    }

    gl.viewport(0, 0, canvas.width, canvas.height);
    gl.clear(gl.COLOR_BUFFER_BIT);
    gl.useProgram(program);

    gl.uniform1f(u_time, t * 0.001);
    gl.uniform2f(u_mouse, mouseX, mouseY);
    gl.uniform1f(u_hover, hoverValue);

    gl.activeTexture(gl.TEXTURE0);
    gl.bindTexture(gl.TEXTURE_2D, textTex);
    gl.uniform1i(u_text, 0);

    gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);
    requestAnimationFrame(draw);
}
requestAnimationFrame(draw);

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