mejoras de estructura

2026-09-14 17:08:10 -03:00
parent 62467348f4
commit 7c13f697db
21 changed files with 1650 additions and 1591 deletions
@@ -0,0 +1,582 @@
+"use strict";
+
+// ===== CONFIGURACIÓN DEL EFECTO =====
+const config = {
+  TEXTURE_DOWNSAMPLE: 1,
+  DENSITY_DISSIPATION: 0.975,
+  VELOCITY_DISSIPATION: 0.98,
+  PRESSURE_DISSIPATION: 0.8,
+  PRESSURE_ITERATIONS: 20,
+  CURL: 30,
+  SPLAT_RADIUS: 0.003
+};
+
+// ===== INICIALIZAR CANVAS =====
+let canvas = document.getElementById("fluidCanvas");
+console.log("Canvas encontrado:", canvas);
+if (!canvas) {
+  console.error("ERROR: No se encontró el canvas con id 'fluidCanvas'");
+}
+canvas.width = window.innerWidth;
+canvas.height = window.innerHeight;
+
+// ===== CONTEXTO WEBGL =====
+let pointers = [];
+let splatStack = [];
+
+function getWebGLContext(canvas) {
+  let params = {
+    alpha: false,
+    depth: false,
+    stencil: false,
+    antialias: false
+  };
+  let gl = canvas.getContext("webgl2", params);
+  let isWebGL2 = !!gl;
+  if (!isWebGL2)
+    gl =
+      canvas.getContext("webgl", params) ||
+      canvas.getContext("experimental-webgl", params);
+  let halfFloat = gl.getExtension("OES_texture_half_float");
+  let support_linear_float = gl.getExtension("OES_texture_half_float_linear");
+  if (isWebGL2) {
+    gl.getExtension("EXT_color_buffer_float");
+    support_linear_float = gl.getExtension("OES_texture_float_linear");
+  }
+  gl.clearColor(0.0, 0.0, 0.0, 1.0);
+  let internalFormat = isWebGL2 ? gl.RGBA16F : gl.RGBA;
+  let internalFormatRG = isWebGL2 ? gl.RG16F : gl.RGBA;
+  let formatRG = isWebGL2 ? gl.RG : gl.RGBA;
+  let texType = isWebGL2 ? gl.HALF_FLOAT : halfFloat.HALF_FLOAT_OES;
+  return {
+    gl: gl,
+    ext: {
+      internalFormat: internalFormat,
+      internalFormatRG: internalFormatRG,
+      formatRG: formatRG,
+      texType: texType
+    },
+    support_linear_float: support_linear_float
+  };
+}
+
+let _getWebGLContext = getWebGLContext(canvas);
+let gl = _getWebGLContext.gl;
+let ext = _getWebGLContext.ext;
+let support_linear_float = _getWebGLContext.support_linear_float;
+
+// ===== POINTER =====
+function pointerPrototype() {
+  this.id = -1;
+  this.x = 0;
+  this.y = 0;
+  this.dx = 0;
+  this.dy = 0;
+  this.down = false;
+  this.moved = false;
+  this.color = [30, 0, 300];
+}
+pointers.push(new pointerPrototype());
+
+// ===== SHADERS =====
+let GLProgram = (function () {
+  function GLProgram(vertexShader, fragmentShader) {
+    if (!(this instanceof GLProgram))
+      throw new TypeError("Cannot call a class as a function");
+    this.uniforms = {};
+    this.program = gl.createProgram();
+    gl.attachShader(this.program, vertexShader);
+    gl.attachShader(this.program, fragmentShader);
+    gl.linkProgram(this.program);
+    if (!gl.getProgramParameter(this.program, gl.LINK_STATUS))
+      throw gl.getProgramInfoLog(this.program);
+    let uniformCount = gl.getProgramParameter(this.program, gl.ACTIVE_UNIFORMS);
+    for (let i = 0; i < uniformCount; i++) {
+      let uniformName = gl.getActiveUniform(this.program, i).name;
+      this.uniforms[uniformName] = gl.getUniformLocation(
+        this.program,
+        uniformName
+      );
+    }
+  }
+  GLProgram.prototype.bind = function bind() {
+    gl.useProgram(this.program);
+  };
+  return GLProgram;
+})();
+
+function compileShader(type, source) {
+  let shader = gl.createShader(type);
+  gl.shaderSource(shader, source);
+  gl.compileShader(shader);
+  if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS))
+    throw gl.getShaderInfoLog(shader);
+  return shader;
+}
+
+// ===== VERTEX SHADER =====
+let baseVertexShader = compileShader(
+  gl.VERTEX_SHADER,
+  "precision highp float; precision mediump sampler2D; attribute vec2 aPosition; varying vec2 vUv; varying vec2 vL; varying vec2 vR; varying vec2 vT; varying vec2 vB; uniform vec2 texelSize; void main () {     vUv = aPosition * 0.5 + 0.5;     vL = vUv - vec2(texelSize.x, 0.0);     vR = vUv + vec2(texelSize.x, 0.0);     vT = vUv + vec2(0.0, texelSize.y);     vB = vUv - vec2(0.0, texelSize.y);     gl_Position = vec4(aPosition, 0.0, 1.0); }"
+);
+
+// ===== FRAGMENT SHADERS =====
+let clearShader = compileShader(
+  gl.FRAGMENT_SHADER,
+  "precision highp float; precision mediump sampler2D; varying vec2 vUv; uniform sampler2D uTexture; uniform float value; void main () {     gl_FragColor = value * texture2D(uTexture, vUv); }"
+);
+
+let displayShader = compileShader(
+  gl.FRAGMENT_SHADER,
+  "precision highp float; precision mediump sampler2D; varying vec2 vUv; uniform sampler2D uTexture; void main () {     gl_FragColor = texture2D(uTexture, vUv); }"
+);
+
+let splatShader = compileShader(
+  gl.FRAGMENT_SHADER,
+  "precision highp float; precision mediump sampler2D; varying vec2 vUv; uniform sampler2D uTarget; uniform float aspectRatio; uniform vec3 color; uniform vec2 point; uniform float radius; void main () {     vec2 p = vUv - point.xy;     p.x *= aspectRatio;     vec3 splat = exp(-dot(p, p) / radius) * color;     vec3 base = texture2D(uTarget, vUv).xyz;     gl_FragColor = vec4(base + splat, 1.0); }"
+);
+
+let advectionManualFilteringShader = compileShader(
+  gl.FRAGMENT_SHADER,
+  "precision highp float; precision mediump sampler2D; varying vec2 vUv; uniform sampler2D uVelocity; uniform sampler2D uSource; uniform vec2 texelSize; uniform float dt; uniform float dissipation; vec4 bilerp (in sampler2D sam, in vec2 p) {     vec4 st;     st.xy = floor(p - 0.5) + 0.5;     st.zw = st.xy + 1.0;     vec4 uv = st * texelSize.xyxy;     vec4 a = texture2D(sam, uv.xy);     vec4 b = texture2D(sam, uv.zy);     vec4 c = texture2D(sam, uv.xw);     vec4 d = texture2D(sam, uv.zw);     vec2 f = p - st.xy;     return mix(mix(a, b, f.x), mix(c, d, f.x), f.y); } void main () {     vec2 coord = gl_FragCoord.xy - dt * texture2D(uVelocity, vUv).xy;     gl_FragColor = dissipation * bilerp(uSource, coord);     gl_FragColor.a = 1.0; }"
+);
+
+let advectionShader = compileShader(
+  gl.FRAGMENT_SHADER,
+  "precision highp float; precision mediump sampler2D; varying vec2 vUv; uniform sampler2D uVelocity; uniform sampler2D uSource; uniform vec2 texelSize; uniform float dt; uniform float dissipation; void main () {     vec2 coord = vUv - dt * texture2D(uVelocity, vUv).xy * texelSize;     gl_FragColor = dissipation * texture2D(uSource, coord); }"
+);
+
+let divergenceShader = compileShader(
+  gl.FRAGMENT_SHADER,
+  "precision highp float; precision mediump sampler2D; varying vec2 vUv; varying vec2 vL; varying vec2 vR; varying vec2 vT; varying vec2 vB; uniform sampler2D uVelocity; vec2 sampleVelocity (in vec2 uv) {     vec2 multiplier = vec2(1.0, 1.0);     if (uv.x < 0.0) { uv.x = 0.0; multiplier.x = -1.0; }     if (uv.x > 1.0) { uv.x = 1.0; multiplier.x = -1.0; }     if (uv.y < 0.0) { uv.y = 0.0; multiplier.y = -1.0; }     if (uv.y > 1.0) { uv.y = 1.0; multiplier.y = -1.0; }     return multiplier * texture2D(uVelocity, uv).xy; } void main () {     float L = sampleVelocity(vL).x;     float R = sampleVelocity(vR).x;     float T = sampleVelocity(vT).y;     float B = sampleVelocity(vB).y;     float div = 0.5 * (R - L + T - B);     gl_FragColor = vec4(div, 0.0, 0.0, 1.0); }"
+);
+
+let curlShader = compileShader(
+  gl.FRAGMENT_SHADER,
+  "precision highp float; precision mediump sampler2D; varying vec2 vUv; varying vec2 vL; varying vec2 vR; varying vec2 vT; varying vec2 vB; uniform sampler2D uVelocity; void main () {     float L = texture2D(uVelocity, vL).y;     float R = texture2D(uVelocity, vR).y;     float T = texture2D(uVelocity, vT).x;     float B = texture2D(uVelocity, vB).x;     float vorticity = R - L - T + B;     gl_FragColor = vec4(vorticity, 0.0, 0.0, 1.0); }"
+);
+
+let vorticityShader = compileShader(
+  gl.FRAGMENT_SHADER,
+  "precision highp float; precision mediump sampler2D; varying vec2 vUv; varying vec2 vL; varying vec2 vR; varying vec2 vT; varying vec2 vB; uniform sampler2D uVelocity; uniform sampler2D uCurl; uniform float curl; uniform float dt; void main () {     float L = texture2D(uCurl, vL).y;     float R = texture2D(uCurl, vR).y;     float T = texture2D(uCurl, vT).x;     float B = texture2D(uCurl, vB).x;     float C = texture2D(uCurl, vUv).x;     vec2 force = vec2(abs(T) - abs(B), abs(R) - abs(L));     force *= 1.0 / length(force + 0.00001) * curl * C;     vec2 vel = texture2D(uVelocity, vUv).xy;     gl_FragColor = vec4(vel + force * dt, 0.0, 1.0); }"
+);
+
+let pressureShader = compileShader(
+  gl.FRAGMENT_SHADER,
+  "precision highp float; precision mediump sampler2D; varying vec2 vUv; varying vec2 vL; varying vec2 vR; varying vec2 vT; varying vec2 vB; uniform sampler2D uPressure; uniform sampler2D uDivergence; vec2 boundary (in vec2 uv) {     uv = min(max(uv, 0.0), 1.0);     return uv; } void main () {     float L = texture2D(uPressure, boundary(vL)).x;     float R = texture2D(uPressure, boundary(vR)).x;     float T = texture2D(uPressure, boundary(vT)).x;     float B = texture2D(uPressure, boundary(vB)).x;     float C = texture2D(uPressure, vUv).x;     float divergence = texture2D(uDivergence, vUv).x;     float pressure = (L + R + B + T - divergence) * 0.25;     gl_FragColor = vec4(pressure, 0.0, 0.0, 1.0); }"
+);
+
+let gradientSubtractShader = compileShader(
+  gl.FRAGMENT_SHADER,
+  "precision highp float; precision mediump sampler2D; varying vec2 vUv; varying vec2 vL; varying vec2 vR; varying vec2 vT; varying vec2 vB; uniform sampler2D uPressure; uniform sampler2D uVelocity; vec2 boundary (in vec2 uv) {     uv = min(max(uv, 0.0), 1.0);     return uv; } void main () {     float L = texture2D(uPressure, boundary(vL)).x;     float R = texture2D(uPressure, boundary(vR)).x;     float T = texture2D(uPressure, boundary(vT)).x;     float B = texture2D(uPressure, boundary(vB)).x;     vec2 velocity = texture2D(uVelocity, vUv).xy;     velocity.xy -= vec2(R - L, T - B);     gl_FragColor = vec4(velocity, 0.0, 1.0); }"
+);
+
+// ===== FRAMEBUFFERS =====
+let textureWidth, textureHeight;
+let density, velocity, divergence, curl, pressure;
+
+function initFramebuffers() {
+  textureWidth = gl.drawingBufferWidth >> config.TEXTURE_DOWNSAMPLE;
+  textureHeight = gl.drawingBufferHeight >> config.TEXTURE_DOWNSAMPLE;
+  let iFormat = ext.internalFormat;
+  let iFormatRG = ext.internalFormatRG;
+  let formatRG = ext.formatRG;
+  let texType = ext.texType;
+  density = createDoubleFBO(
+    0,
+    textureWidth,
+    textureHeight,
+    iFormat,
+    gl.RGBA,
+    texType,
+    support_linear_float ? gl.LINEAR : gl.NEAREST
+  );
+  velocity = createDoubleFBO(
+    2,
+    textureWidth,
+    textureHeight,
+    iFormatRG,
+    formatRG,
+    texType,
+    support_linear_float ? gl.LINEAR : gl.NEAREST
+  );
+  divergence = createFBO(
+    4,
+    textureWidth,
+    textureHeight,
+    iFormatRG,
+    formatRG,
+    texType,
+    gl.NEAREST
+  );
+  curl = createFBO(
+    5,
+    textureWidth,
+    textureHeight,
+    iFormatRG,
+    formatRG,
+    texType,
+    gl.NEAREST
+  );
+  pressure = createDoubleFBO(
+    6,
+    textureWidth,
+    textureHeight,
+    iFormatRG,
+    formatRG,
+    texType,
+    gl.NEAREST
+  );
+}
+
+function createFBO(texId, w, h, internalFormat, format, type, param) {
+  gl.activeTexture(gl.TEXTURE0 + texId);
+  let texture = gl.createTexture();
+  gl.bindTexture(gl.TEXTURE_2D, texture);
+  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, param);
+  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, param);
+  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, internalFormat, w, h, 0, format, type, null);
+  let fbo = gl.createFramebuffer();
+  gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
+  gl.framebufferTexture2D(
+    gl.FRAMEBUFFER,
+    gl.COLOR_ATTACHMENT0,
+    gl.TEXTURE_2D,
+    texture,
+    0
+  );
+  gl.viewport(0, 0, w, h);
+  gl.clear(gl.COLOR_BUFFER_BIT);
+  return [texture, fbo, texId];
+}
+
+function createDoubleFBO(texId, w, h, internalFormat, format, type, param) {
+  let fbo1 = createFBO(texId, w, h, internalFormat, format, type, param);
+  let fbo2 = createFBO(texId + 1, w, h, internalFormat, format, type, param);
+  return {
+    get first() {
+      return fbo1;
+    },
+    get second() {
+      return fbo2;
+    },
+    swap: function swap() {
+      let temp = fbo1;
+      fbo1 = fbo2;
+      fbo2 = temp;
+    }
+  };
+}
+
+initFramebuffers();
+
+// ===== PROGRAMS =====
+let clearProgram = new GLProgram(baseVertexShader, clearShader);
+let displayProgram = new GLProgram(baseVertexShader, displayShader);
+let splatProgram = new GLProgram(baseVertexShader, splatShader);
+let advectionProgram = new GLProgram(
+  baseVertexShader,
+  support_linear_float ? advectionShader : advectionManualFilteringShader
+);
+let divergenceProgram = new GLProgram(baseVertexShader, divergenceShader);
+let curlProgram = new GLProgram(baseVertexShader, curlShader);
+let vorticityProgram = new GLProgram(baseVertexShader, vorticityShader);
+let pressureProgram = new GLProgram(baseVertexShader, pressureShader);
+let gradienSubtractProgram = new GLProgram(
+  baseVertexShader,
+  gradientSubtractShader
+);
+
+// ===== BLIT =====
+let blit = (function () {
+  gl.bindBuffer(gl.ARRAY_BUFFER, gl.createBuffer());
+  gl.bufferData(
+    gl.ARRAY_BUFFER,
+    new Float32Array([-1, -1, -1, 1, 1, 1, 1, -1]),
+    gl.STATIC_DRAW
+  );
+  gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, gl.createBuffer());
+  gl.bufferData(
+    gl.ELEMENT_ARRAY_BUFFER,
+    new Uint16Array([0, 1, 2, 0, 2, 3]),
+    gl.STATIC_DRAW
+  );
+  gl.vertexAttribPointer(0, 2, gl.FLOAT, false, 0, 0);
+  gl.enableVertexAttribArray(0);
+  return function (destination) {
+    gl.bindFramebuffer(gl.FRAMEBUFFER, destination);
+    gl.drawElements(gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 0);
+  };
+})();
+
+// ===== SPLAT =====
+function splat(x, y, dx, dy, color) {
+  splatProgram.bind();
+  gl.uniform1i(splatProgram.uniforms.uTarget, velocity.first[2]);
+  gl.uniform1f(splatProgram.uniforms.aspectRatio, canvas.width / canvas.height);
+  gl.uniform2f(
+    splatProgram.uniforms.point,
+    x / canvas.width,
+    1.0 - y / canvas.height
+  );
+  gl.uniform3f(splatProgram.uniforms.color, dx, -dy, 1.0);
+  gl.uniform1f(splatProgram.uniforms.radius, config.SPLAT_RADIUS);
+  blit(velocity.second[1]);
+  velocity.swap();
+  gl.uniform1i(splatProgram.uniforms.uTarget, density.first[2]);
+  gl.uniform3f(
+    splatProgram.uniforms.color,
+    color[0] * 0.3,
+    color[1] * 0.3,
+    color[2] * 0.3
+  );
+  blit(density.second[1]);
+  density.swap();
+}
+
+// ===== RESIZE =====
+function resizeCanvas() {
+  (canvas.width !== canvas.clientWidth ||
+    canvas.height !== canvas.clientHeight) &&
+    ((canvas.width = canvas.clientWidth),
+    (canvas.height = canvas.clientHeight),
+    initFramebuffers());
+}
+
+// ===== COLORES DE LA MARCA CON TRANSICIÓN =====
+const brandColors = [
+  //[0.874, 0.741, 0.725], // Rosa (#DFBDB9)
+  [0.729, 0.071, 0.302], // Bordo (#BA124D)
+  [0.000, 0.247, 0.322]  // Teal (#003F52)
+];
+
+let currentColor = brandColors[0];
+let targetColor = brandColors[1];
+let transitionProgress = 0;
+const transitionSpeed = 0.008;
+
+function lerpColor(colorA, colorB, t) {
+  return [
+    colorA[0] + (colorB[0] - colorA[0]) * t,
+    colorA[1] + (colorB[1] - colorA[1]) * t,
+    colorA[2] + (colorB[2] - colorA[2]) * t
+  ];
+}
+
+let colorArr = currentColor;
+let count = 0;
+
+// ===== DETECTAR ELEMENTOS DE TEXTO =====
+function isMouseOverTextElement(target) {
+  // Listado de selectores que necesitan "modo apaciguado"
+  const textSelectors = [
+    'p', '.hero-content p','h1', 'h2', 'h3', 'h4', 'h5', '.hero-content h1',
+    '.hero-content h2', '.eyebrow', 'a.sheet-link', '.sheet-link span',
+    '.menu-btn', '.sheet-link-desc', '.sheet-link-main'
+  ];
+  
+  // Verificar si el target o sus ancestros coinciden con algún selector
+  for (const selector of textSelectors) {
+    if (target.closest(selector)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+// ===== EVENTOS CON COLORES DE MARCA =====
+document.addEventListener("mousemove", function (e) {
+  // Detectar si estamos sobre un elemento de texto
+  const overText = isMouseOverTextElement(e.target);
+  
+  count++;
+  if (count > 1) {
+    transitionProgress += transitionSpeed;
+    if (transitionProgress >= 1) {
+      transitionProgress = 0;
+      let currentIndex = brandColors.indexOf(currentColor);
+      let nextIndex = (currentIndex + 1) % brandColors.length;
+      currentColor = targetColor;
+      targetColor = brandColors[nextIndex];
+    }
+    colorArr = lerpColor(currentColor, targetColor, transitionProgress);
+    count = 0;
+  }
+
+  pointers[0].down = true;
+  pointers[0].color = colorArr;
+  pointers[0].moved = pointers[0].down;
+  
+  // Aplicar multiplicador diferente según si estamos sobre texto o no
+  const multiplier = overText ? 8 : 10.0; // Reducido a 4x sobre texto (vs 10x)
+  
+  pointers[0].dx = (e.clientX - canvas.offsetLeft - pointers[0].x) * multiplier;
+  pointers[0].dy = (e.clientY - canvas.offsetTop - pointers[0].y) * multiplier;
+  pointers[0].x = e.clientX - canvas.offsetLeft;
+  pointers[0].y = e.clientY - canvas.offsetTop;
+});
+
+canvas.addEventListener(
+  "touchmove",
+  function (e) {
+    e.preventDefault();
+    let touches = e.targetTouches;
+    count++;
+    if (count > 20) {
+      transitionProgress += transitionSpeed;
+      if (transitionProgress >= 1) {
+        transitionProgress = 0;
+        let currentIndex = brandColors.indexOf(currentColor);
+        let nextIndex = (currentIndex + 1) % brandColors.length;
+        currentColor = targetColor;
+        targetColor = brandColors[nextIndex];
+      }
+      colorArr = lerpColor(currentColor, targetColor, transitionProgress);
+      count = 0;
+    }
+    
+    for (let i = 0, len = touches.length; i < len; i++) {
+      if (i >= pointers.length) pointers.push(new pointerPrototype());
+      pointers[i].id = touches[i].identifier;
+      pointers[i].down = true;
+      pointers[i].x = touches[i].pageX;
+      pointers[i].y = touches[i].pageY;
+      pointers[i].color = colorArr;
+      let pointer = pointers[i];
+      pointer.moved = pointer.down;
+      pointer.dx = (touches[i].pageX - pointer.x) * 10.0;
+      pointer.dy = (touches[i].pageY - pointer.y) * 10.0;
+      pointer.x = touches[i].pageX;
+      pointer.y = touches[i].pageY;
+    }
+  },
+  false
+);
+
+// ===== LOOP PRINCIPAL =====
+let lastTime = Date.now();
+
+function update() {
+  resizeCanvas();
+  let dt = Math.min((Date.now() - lastTime) / 1000, 0.016);
+  lastTime = Date.now();
+  gl.viewport(0, 0, textureWidth, textureHeight);
+
+  advectionProgram.bind();
+  gl.uniform2f(
+    advectionProgram.uniforms.texelSize,
+    1.0 / textureWidth,
+    1.0 / textureHeight
+  );
+  gl.uniform1i(advectionProgram.uniforms.uVelocity, velocity.first[2]);
+  gl.uniform1i(advectionProgram.uniforms.uSource, velocity.first[2]);
+  gl.uniform1f(advectionProgram.uniforms.dt, dt);
+  gl.uniform1f(
+    advectionProgram.uniforms.dissipation,
+    config.VELOCITY_DISSIPATION
+  );
+  blit(velocity.second[1]);
+  velocity.swap();
+
+  gl.uniform1i(advectionProgram.uniforms.uVelocity, velocity.first[2]);
+  gl.uniform1i(advectionProgram.uniforms.uSource, density.first[2]);
+  gl.uniform1f(
+    advectionProgram.uniforms.dissipation,
+    config.DENSITY_DISSIPATION
+  );
+  blit(density.second[1]);
+  density.swap();
+
+  for (let i = 0, len = pointers.length; i < len; i++) {
+    let pointer = pointers[i];
+    if (pointer.moved) {
+      splat(pointer.x, pointer.y, pointer.dx, pointer.dy, pointer.color);
+      pointer.moved = false;
+    }
+  }
+
+  curlProgram.bind();
+  gl.uniform2f(
+    curlProgram.uniforms.texelSize,
+    1.0 / textureWidth,
+    1.0 / textureHeight
+  );
+  gl.uniform1i(curlProgram.uniforms.uVelocity, velocity.first[2]);
+  blit(curl[1]);
+
+  vorticityProgram.bind();
+  gl.uniform2f(
+    vorticityProgram.uniforms.texelSize,
+    1.0 / textureWidth,
+    1.0 / textureHeight
+  );
+  gl.uniform1i(vorticityProgram.uniforms.uVelocity, velocity.first[2]);
+  gl.uniform1i(vorticityProgram.uniforms.uCurl, curl[2]);
+  gl.uniform1f(vorticityProgram.uniforms.curl, config.CURL);
+  gl.uniform1f(vorticityProgram.uniforms.dt, dt);
+  blit(velocity.second[1]);
+  velocity.swap();
+
+  divergenceProgram.bind();
+  gl.uniform2f(
+    divergenceProgram.uniforms.texelSize,
+    1.0 / textureWidth,
+    1.0 / textureHeight
+  );
+  gl.uniform1i(divergenceProgram.uniforms.uVelocity, velocity.first[2]);
+  blit(divergence[1]);
+
+  clearProgram.bind();
+  let pressureTexId = pressure.first[2];
+  gl.activeTexture(gl.TEXTURE0 + pressureTexId);
+  gl.bindTexture(gl.TEXTURE_2D, pressure.first[0]);
+  gl.uniform1i(clearProgram.uniforms.uTexture, pressureTexId);
+  gl.uniform1f(clearProgram.uniforms.value, config.PRESSURE_DISSIPATION);
+  blit(pressure.second[1]);
+  pressure.swap();
+
+  pressureProgram.bind();
+  gl.uniform2f(
+    pressureProgram.uniforms.texelSize,
+    1.0 / textureWidth,
+    1.0 / textureHeight
+  );
+  gl.uniform1i(pressureProgram.uniforms.uDivergence, divergence[2]);
+  pressureTexId = pressure.first[2];
+  gl.activeTexture(gl.TEXTURE0 + pressureTexId);
+  for (let _i = 0; _i < config.PRESSURE_ITERATIONS; _i++) {
+    gl.bindTexture(gl.TEXTURE_2D, pressure.first[0]);
+    gl.uniform1i(pressureProgram.uniforms.uPressure, pressureTexId);
+    blit(pressure.second[1]);
+    pressure.swap();
+  }
+
+  gradienSubtractProgram.bind();
+  gl.uniform2f(
+    gradienSubtractProgram.uniforms.texelSize,
+    1.0 / textureWidth,
+    1.0 / textureHeight
+  );
+  gl.uniform1i(gradienSubtractProgram.uniforms.uPressure, pressure.first[2]);
+  gl.uniform1i(gradienSubtractProgram.uniforms.uVelocity, velocity.first[2]);
+  blit(velocity.second[1]);
+  velocity.swap();
+
+  gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);
+  displayProgram.bind();
+  gl.uniform1i(displayProgram.uniforms.uTexture, density.first[2]);
+  blit(null);
+
+  requestAnimationFrame(update);
+}
+
+update();
+
+// ===== REDIMENSIONAR AL CAMBIAR TAMAÑO DE VENTANA =====
+window.addEventListener("resize", function() {
+  canvas.width = window.innerWidth;
+  canvas.height = window.innerHeight;
+  initFramebuffers();
+});