Mesh Gradient Background3

'use client';
import React, { useMemo, useRef } from 'react';
import { Canvas, useFrame } from '@react-three/fiber';
import { extend } from '@react-three/fiber';
import { MathUtils, Vector3, Color } from 'three';
import * as THREE from 'three';
import { Environment } from '@react-three/drei';
extend({ IcosahedronGeometry: THREE.IcosahedronGeometry });

const vertexShader = `
uniform float u_intensity;
uniform float u_time;

varying vec2 vUv;
varying float vDisplacement;

// Classic Perlin 3D Noise functions
vec4 permute(vec4 x) {
    return mod(((x*34.0)+1.0)*x, 289.0);
}

vec4 taylorInvSqrt(vec4 r) {
    return 1.79284291400159 - 0.85373472095314 * r;
}

vec3 fade(vec3 t) {
    return t*t*t*(t*(t*6.0-15.0)+10.0);
}

float cnoise(vec3 P) {
    vec3 Pi0 = floor(P);
    vec3 Pi1 = Pi0 + vec3(1.0);
    Pi0 = mod(Pi0, 289.0);
    Pi1 = mod(Pi1, 289.0);
    vec3 Pf0 = fract(P);
    vec3 Pf1 = Pf0 - vec3(1.0);
    vec4 ix = vec4(Pi0.x, Pi1.x, Pi0.x, Pi1.x);
    vec4 iy = vec4(Pi0.yy, Pi1.yy);
    vec4 iz0 = Pi0.zzzz;
    vec4 iz1 = Pi1.zzzz;

    vec4 ixy = permute(permute(ix) + iy);
    vec4 ixy0 = permute(ixy + iz0);
    vec4 ixy1 = permute(ixy + iz1);

    vec4 gx0 = ixy0 / 7.0;
    vec4 gy0 = fract(floor(gx0) / 7.0) - 0.5;
    gx0 = fract(gx0);
    vec4 gz0 = vec4(0.5) - abs(gx0) - abs(gy0);
    vec4 sz0 = step(gz0, vec4(0.0));
    gx0 -= sz0 * (step(0.0, gx0) - 0.5);
    gy0 -= sz0 * (step(0.0, gy0) - 0.5);

    vec4 gx1 = ixy1 / 7.0;
    vec4 gy1 = fract(floor(gx1) / 7.0) - 0.5;
    gx1 = fract(gx1);
    vec4 gz1 = vec4(0.5) - abs(gx1) - abs(gy1);
    vec4 sz1 = step(gz1, vec4(0.0));
    gx1 -= sz1 * (step(0.0, gx1) - 0.5);
    gy1 -= sz1 * (step(0.0, gy1) - 0.5);

    vec3 g000 = vec3(gx0.x,gy0.x,gz0.x);
    vec3 g100 = vec3(gx0.y,gy0.y,gz0.y);
    vec3 g010 = vec3(gx0.z,gy0.z,gz0.z);
    vec3 g110 = vec3(gx0.w,gy0.w,gz0.w);
    vec3 g001 = vec3(gx1.x,gy1.x,gz1.x);
    vec3 g101 = vec3(gx1.y,gy1.y,gz1.y);
    vec3 g011 = vec3(gx1.z,gy1.z,gz1.z);
    vec3 g111 = vec3(gx1.w,gy1.w,gz1.w);

    vec4 norm0 = taylorInvSqrt(vec4(dot(g000, g000), dot(g010, g010), dot(g100, g100), dot(g110, g110)));
    g000 *= norm0.x;
    g010 *= norm0.y;
    g100 *= norm0.z;
    g110 *= norm0.w;
    vec4 norm1 = taylorInvSqrt(vec4(dot(g001, g001), dot(g011, g011), dot(g101, g101), dot(g111, g111)));
    g001 *= norm1.x;
    g011 *= norm1.y;
    g101 *= norm1.z;
    g111 *= norm1.w;

    float n000 = dot(g000, Pf0);
    float n100 = dot(g100, vec3(Pf1.x, Pf0.yz));
    float n010 = dot(g010, vec3(Pf0.x, Pf1.y, Pf0.z));
    float n110 = dot(g110, vec3(Pf1.xy, Pf0.z));
    float n001 = dot(g001, vec3(Pf0.xy, Pf1.z));
    float n101 = dot(g101, vec3(Pf1.x, Pf0.y, Pf1.z));
    float n011 = dot(g011, vec3(Pf0.x, Pf1.yz));
    float n111 = dot(g111, Pf1);

    vec3 fade_xyz = fade(Pf0);
    vec4 n_z = mix(vec4(n000, n100, n010, n110), vec4(n001, n101, n011, n111), fade_xyz.z);
    vec2 n_yz = mix(n_z.xy, n_z.zw, fade_xyz.y);
    float n_xyz = mix(n_yz.x, n_yz.y, fade_xyz.x); 
    return 2.2 * n_xyz;
}

void main() {
    vUv = uv;

    vDisplacement = cnoise(position + vec3(2.0 * u_time));
  
    vec3 newPosition = position + normal * (u_intensity * vDisplacement);
  
    vec4 modelPosition = modelMatrix * vec4(newPosition, 1.0);
    vec4 viewPosition = viewMatrix * modelPosition;
    vec4 projectedPosition = projectionMatrix * viewPosition;
  
    gl_Position = projectedPosition;
}
`;

const fragmentShader = `
uniform float u_intensity;
uniform float u_time;
uniform vec3 u_color;

varying vec2 vUv;
varying float vDisplacement;

// Function to generate random noise
float random(vec2 st) {
  return fract(sin(dot(st.xy, vec2(12.9898,78.233))) * 43758.5453123);
}

void main() {
  float distort = 2.0 * vDisplacement * u_intensity * sin(vUv.y * 10.0 + u_time);
  vec3 color = mix(u_color, vec3(1.0, 1.0, 1.0), distort);

  // Add screen-space random noise
  float noise = random(gl_FragCoord.xy * u_time * 0.05) * 0.05; // tweak strength
  color += noise;

  gl_FragColor = vec4(color, 1.0);
}
`;

interface BlobProps {
  color?: string;
}

const Blob: React.FC<BlobProps> = ({ color = '#ffd717' }) => {
  const mesh = useRef<THREE.Mesh>(null);
  const hover = useRef(false);

  const uniforms = useMemo(
    () => ({
      u_time: { value: 0 },
      u_intensity: { value: 0.3 },
      u_color: { value: new Color(color) },
    }),
    []
  );

  const targetPosition = useRef(new Vector3(0, 0, 0));
  const currentPosition = useRef(new Vector3(0, 0, 0));

  useFrame((state) => {
    const { clock, mouse } = state;

    if (mesh.current) {
      const material = mesh.current.material as THREE.ShaderMaterial;

      material.uniforms.u_time.value = 0.4 * clock.getElapsedTime();

      material.uniforms.u_intensity.value = MathUtils.lerp(
        material.uniforms.u_intensity.value,
        hover.current ? 0.7 : 1,
        0.02
      );

      // Update target position based on mouse
      targetPosition.current.set(mouse.x * 0.3, mouse.y * 0.3, 0);
      currentPosition.current.lerp(targetPosition.current, 0.1);

      mesh.current.position.copy(currentPosition.current);
    }
  });

  return (
    <mesh
      ref={mesh}
      scale={1.5}
      position={[0, 0, 0]}
      onPointerOver={() => (hover.current = true)}
      onPointerOut={() => (hover.current = false)}
    >
      <icosahedronGeometry args={[2, 20]} />
      <shaderMaterial
        vertexShader={vertexShader}
        fragmentShader={fragmentShader}
        uniforms={uniforms}
      />
    </mesh>
  );
};

const Home: React.FC = () => {
  return (
    <div className='h-screen w-screen flex justify-center items-center'>
      <Canvas camera={{ position: [0.0, 0.0, 8.0], fov: 15 }}>
        <Environment preset='studio' environmentIntensity={0.5} />
        <Blob color='#ff0055' />
      </Canvas>
    </div>
  );
};

export default Home;