Plasma

plasma

This tailwind example is contributed by Raul antonio de la cruz hernandez, on 04-Oct-2025. Component is made with Tailwind CSS v3. similar terms for this example is Transitions

Header Animation

Author Raul antonio de la cruz hernandez

161

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<!DOCTYPE html>
<html lang="es">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Plasma Effect</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            width: 100vw;
            height: 100vh;
            overflow: hidden;
            background: #000;
        }
        #container {
            width: 100%;
            height: 100%;
            position: relative;
            overflow: hidden;
        }
        canvas {
            width: 100%;
            height: 100%;
            display: block;
        }
    </style>
</head>
<body>

const vertexShaderSource = `#version 300 es
precision highp float;
in vec2 position;
in vec2 uv;
out vec2 vUv;
void main() {
  vUv = uv;
  gl_Position = vec4(position, 0.0, 1.0);
}
`;

const fragmentShaderSource = `#version 300 es
precision highp float;
uniform vec2 iResolution;
uniform float iTime;
uniform vec3 uCustomColor;
uniform float uUseCustomColor;
uniform float uSpeed;
uniform float uDirection;
uniform float uScale;
uniform float uOpacity;
uniform vec2 uMouse;
uniform float uMouseInteractive;
out vec4 fragColor;

void mainImage(out vec4 o, vec2 C) {
  vec2 center = iResolution.xy * 0.5;
  C = (C - center) / uScale + center;

vec2 mouseOffset = (uMouse - center) * 0.0002;
  C += mouseOffset * length(C - center) * step(0.5, uMouseInteractive);

float i, d, z, T = iTime * uSpeed * uDirection;
  vec3 O, p, S;

for (vec2 r = iResolution.xy, Q; ++i < 60.; O += o.w/d*o.xyz) {
    p = z*normalize(vec3(C-.5*r,r.y));
    p.z -= 4.;
    S = p;
    d = p.y-T;

p.x += .4*(1.+p.y)*sin(d + p.x*0.1)*cos(.34*d + p.x*0.05);
    Q = p.xz *= mat2(cos(p.y+vec4(0,11,33,0)-T));
    z+= d = abs(sqrt(length(Q*Q)) - .25*(5.+S.y))/3.+8e-4;
    o = 1.+sin(S.y+p.z*.5+S.z-length(S-p)+vec4(2,1,0,8));
  }

o.xyz = tanh(O/1e4);
}

bool finite1(float x){ return !(isnan(x) || isinf(x)); }
vec3 sanitize(vec3 c){
  return vec3(
    finite1(c.r) ? c.r : 0.0,
    finite1(c.g) ? c.g : 0.0,
    finite1(c.b) ? c.b : 0.0
  );
}

void main() {
  vec4 o = vec4(0.0);
  mainImage(o, gl_FragCoord.xy);
  vec3 rgb = sanitize(o.rgb);

float intensity = (rgb.r + rgb.g + rgb.b) / 3.0;
  vec3 customColor = intensity * uCustomColor;
  vec3 finalColor = mix(rgb, customColor, step(0.5, uUseCustomColor));

float alpha = length(rgb) * uOpacity;
  fragColor = vec4(finalColor, alpha);
}`;

class Plasma {
        constructor(container, options = {}) {
            this.container = container;
            this.options = {
                color: options.color || '#00ffff',
                speed: options.speed || 1,
                direction: options.direction || 'forward',
                scale: options.scale || 1,
                opacity: options.opacity || 1,
                mouseInteractive: options.mouseInteractive !== false
            };

this.mousePos = { x: 0, y: 0 };
            this.init();
        }

createShader(gl, type, source) {
            const shader = gl.createShader(type);
            gl.shaderSource(shader, source);
            gl.compileShader(shader);

if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
                console.error('Error compilando shader:', gl.getShaderInfoLog(shader));
                gl.deleteShader(shader);
                return null;
            }

return shader;
        }

init() {
            const canvas = document.createElement('canvas');
            const gl = canvas.getContext('webgl2', { alpha: true, antialias: false });

if (!gl) {
                console.error('WebGL2 no disponible');
                return;
            }

this.gl = gl;
            this.canvas = canvas;
            canvas.style.display = 'block';
            canvas.style.width = '100%';
            canvas.style.height = '100%';
            this.container.appendChild(canvas);

const vertexShader = this.createShader(gl, gl.VERTEX_SHADER, vertexShaderSource);
            const fragmentShader = this.createShader(gl, gl.FRAGMENT_SHADER, fragmentShaderSource);

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)) {
                console.error('Error enlazando programa:', gl.getProgramInfoLog(this.program));
                return;
            }

gl.useProgram(this.program);

// Crear geometría de triángulo que cubre toda la pantalla
            const positions = new Float32Array([
                -1, -1,
                -1, 4,
                4, -1
            ]);

const uvs = new Float32Array([
                0, 0,
                0, 2,
                2, 0
            ]);

const positionBuffer = gl.createBuffer();
            gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);
            gl.bufferData(gl.ARRAY_BUFFER, positions, gl.STATIC_DRAW);

const positionLoc = gl.getAttribLocation(this.program, 'position');
            gl.enableVertexAttribArray(positionLoc);
            gl.vertexAttribPointer(positionLoc, 2, gl.FLOAT, false, 0, 0);

const uvBuffer = gl.createBuffer();
            gl.bindBuffer(gl.ARRAY_BUFFER, uvBuffer);
            gl.bufferData(gl.ARRAY_BUFFER, uvs, gl.STATIC_DRAW);

const uvLoc = gl.getAttribLocation(this.program, 'uv');
            gl.enableVertexAttribArray(uvLoc);
            gl.vertexAttribPointer(uvLoc, 2, gl.FLOAT, false, 0, 0);

// Uniforms
            const useCustomColor = this.options.color ? 1.0 : 0.0;
            const customColorRgb = this.options.color ? hexToRgb(this.options.color) : [1, 1, 1];
            const directionMultiplier = this.options.direction === 'reverse' ? -1.0 : 1.0;

this.uniforms = {
                iTime: gl.getUniformLocation(this.program, 'iTime'),
                iResolution: gl.getUniformLocation(this.program, 'iResolution'),
                uCustomColor: gl.getUniformLocation(this.program, 'uCustomColor'),
                uUseCustomColor: gl.getUniformLocation(this.program, 'uUseCustomColor'),
                uSpeed: gl.getUniformLocation(this.program, 'uSpeed'),
                uDirection: gl.getUniformLocation(this.program, 'uDirection'),
                uScale: gl.getUniformLocation(this.program, 'uScale'),
                uOpacity: gl.getUniformLocation(this.program, 'uOpacity'),
                uMouse: gl.getUniformLocation(this.program, 'uMouse'),
                uMouseInteractive: gl.getUniformLocation(this.program, 'uMouseInteractive')
            };

gl.uniform3f(this.uniforms.uCustomColor, ...customColorRgb);
            gl.uniform1f(this.uniforms.uUseCustomColor, useCustomColor);
            gl.uniform1f(this.uniforms.uSpeed, this.options.speed * 0.4);
            gl.uniform1f(this.uniforms.uDirection, directionMultiplier);
            gl.uniform1f(this.uniforms.uScale, this.options.scale);
            gl.uniform1f(this.uniforms.uOpacity, this.options.opacity);
            gl.uniform2f(this.uniforms.uMouse, 0, 0);
            gl.uniform1f(this.uniforms.uMouseInteractive, this.options.mouseInteractive ? 1.0 : 0.0);

this.directionMultiplier = directionMultiplier;

if (this.options.mouseInteractive) {
                this.handleMouseMove = (e) => {
                    const rect = this.container.getBoundingClientRect();
                    this.mousePos.x = e.clientX - rect.left;
                    this.mousePos.y = e.clientY - rect.top;
                    gl.uniform2f(this.uniforms.uMouse, this.mousePos.x, this.mousePos.y);
                };
                this.container.addEventListener('mousemove', this.handleMouseMove);
            }

this.setSize();

this.resizeObserver = new ResizeObserver(() => this.setSize());
            this.resizeObserver.observe(this.container);

gl.enable(gl.BLEND);
            gl.blendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA);

this.t0 = performance.now();
            this.animate();
        }

setSize() {
            const rect = this.container.getBoundingClientRect();
            const dpr = Math.min(window.devicePixelRatio || 1, 2);
            const width = Math.max(1, Math.floor(rect.width * dpr));
            const height = Math.max(1, Math.floor(rect.height * dpr));

this.canvas.width = width;
            this.canvas.height = height;

this.gl.viewport(0, 0, width, height);
            this.gl.uniform2f(this.uniforms.iResolution, width, height);
        }

animate() {
            const t = performance.now();
            let timeValue = (t - this.t0) * 0.001;

if (this.options.direction === 'pingpong') {
                const cycle = Math.sin(timeValue * 0.5) * this.directionMultiplier;
                this.gl.uniform1f(this.uniforms.uDirection, cycle);
            }

this.gl.uniform1f(this.uniforms.iTime, timeValue);

this.gl.clearColor(0, 0, 0, 0);
            this.gl.clear(this.gl.COLOR_BUFFER_BIT);
            this.gl.drawArrays(this.gl.TRIANGLES, 0, 3);

this.raf = requestAnimationFrame(() => this.animate());
        }

dispose() {
            cancelAnimationFrame(this.raf);
            this.resizeObserver?.disconnect();
            if (this.options.mouseInteractive && this.handleMouseMove) {
                this.container.removeEventListener('mousemove', this.handleMouseMove);
            }
            try {
                if (this.canvas && this.canvas.parentElement === this.container) {
                    this.container.removeChild(this.canvas);
                }
            } catch (e) {
                console.warn('Canvas ya fue removido');
            }
        }
    }

// Inicializar
    window.addEventListener('DOMContentLoaded', () => {
        const container = document.getElementById('container');
        new Plasma(container, {
            color: '#054cf5',        // Color del plasma
            speed: 1,                // Velocidad
            direction: 'forward',    // 'forward', 'reverse', 'pingpong'
            scale: 1,                // Escala
            opacity: 1,              // Opacidad
            mouseInteractive: false  // Interacción con mouse desactivada
        });
    });
</script>

</body>
</html>

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