vent-template/src/utils/threejs/util.ts

import * as THREE from 'three';
import { EffectComposer } from 'three/examples/jsm/postprocessing/EffectComposer.js';
import { RenderPass } from 'three/examples/jsm/postprocessing/RenderPass.js';
import { OutlinePass } from 'three/examples/jsm/postprocessing/OutlinePass.js';
import { FXAAShader } from 'three/examples/jsm/shaders/FXAAShader.js';
import { ShaderPass } from 'three/examples/jsm/postprocessing/ShaderPass.js';
import { TWEEN } from 'three/examples/jsm/libs/tween.module.min.js';
import gsap from 'gsap';
// import * as dat from "dat.gui";

/* 设置模型居中 */
export const setModalCenter = (group) => {
  const box3 = new THREE.Box3();
  // 计算层级模型group的包围盒
  // 模型group是加载一个三维模型返回的对象，包含多个网格模型
  box3.expandByObject(group);
  // 计算一个层级模型对应包围盒的几何体中心在世界坐标中的位置
  const center = new THREE.Vector3();
  box3.getCenter(center);
  // console.log('查看几何体中心坐标', center);
  // 重新设置模型的位置，使之居中。
  group.position.x = group.position.x - center.x;
  group.position.y = group.position.y - center.y;
  group.position.z = group.position.z - center.z;
};

// 获取一个canvas 图文纹理
export const getTextCanvas = (w, h, textArr, imgUrl) => {
  // canvas 宽高最好是2的倍数
  const width = w;
  const height = h;
  // 创建一个canvas元素 获取上下文环境
  const canvas = document.createElement('canvas');
  canvas.style.letterSpacing = 10 + 'px';
  const ctx = canvas.getContext('2d') as CanvasRenderingContext2D;
  canvas.width = width;
  canvas.height = height;
  // 设置样式
  ctx.textAlign = 'start';
  // ctx.fillStyle = 'rgba(44, 62, 80, 0.65)';
  ctx.fillStyle = 'rgba(0, 0, 0, 0)';
  // 创建渐变
  // var gradient=ctx.createLinearGradient(0,0, canvas.width,0);
  // gradient.addColorStop(0,"magenta");
  // gradient.addColorStop(0.5,"blue");
  // gradient.addColorStop(1.0,"red");
  // // 用渐变填色
  // ctx.fillStyle=gradient;

  ctx.shadowColor = 'rgba(0, 10,0,0.8)';
  ctx.shadowBlur = 4;
  ctx.shadowOffsetX = 1;
  ctx.shadowOffsetY = 1;

  ctx.fillRect(0, 0, width, height);
  //添加背景图片，进行异步,否则可能会过早渲染,导致空白
  return new Promise((resolve, reject) => {
    if (imgUrl) {
      const img = new Image();

      img.src = new URL('../../assets/images/vent/model_image/' + imgUrl, import.meta.url).href;
      img.onload = () => {
        //将画布处理为透明
        ctx.clearRect(0, 0, width, height);
        //绘画图片
        ctx.drawImage(img, 0, 0, width, height);
        ctx.textBaseline = 'middle';
        // 由于文字需要自己排版 所以循环一下
        // item 是自定义的文字对象 包含文字内容 字体大小颜色 位置信息等
        textArr.forEach((item) => {
          ctx.font = item.font;
          ctx.fillStyle = item.color;
          ctx.fillText(item.text, item.x, item.y, 1024);
        });
        resolve(canvas);
      };
      //图片加载失败的方法
      img.onerror = (e) => {
        reject(e);
      };
    } else {
      //将画布处理为透明
      ctx.clearRect(0, 0, width, height);
      ctx.textBaseline = 'middle';

      textArr.forEach((item) => {
        ctx.lineWidth = 2;
        ctx.font = item.font;
        ctx.fillStyle = item.color;
        !!item.strokeStyle && (ctx.strokeStyle = item.strokeStyle);
        ctx.strokeText(item.text, item.x, item.y, 1024);
        ctx.fillText(item.text, item.x, item.y, 1024);
      });
      resolve(canvas);
    }
  });
};

// 发光路径
export const setLineGeo = (scene) => {
  const box = new THREE.BoxGeometry(30, 30, 30);
  // 立方体几何体box作为EdgesGeometry参数创建一个新的几何体
  const edges = new THREE.EdgesGeometry(box);
  // 立方体线框，不显示中间的斜线
  new THREE.TextureLoader().setPath('/model/hdr/').load('8.png', (texture) => {
    const edgesMaterial = new THREE.MeshBasicMaterial({
      // color: 0x00ffff,
      map: texture,
      transparent: true,
      depthWrite: false,
    });

    const line = new THREE.LineSegments(edges, edgesMaterial);
    // 网格模型和网格模型对应的轮廓线框插入到场景中
    scene.add(line);
  });

  box.attributes.position.array;

  const lightMaterial = new THREE.ShaderMaterial({
    vertexShader: `varying vec3 vPosition;
    varying vec2 vUv;
    uniform float uTime;
    
    void main(){
        // vec3 scalePosition = vec3(position.x+uTime,position.y,position.z+uTime);
        vec4 viewPosition = viewMatrix * modelMatrix * vec4(position,1);
        gl_Position = projectionMatrix *  viewPosition;
        vPosition = position;
        vUv = uv;
        
    }`,
    fragmentShader: `varying vec3 vPosition;
    varying vec2 vUv;
    uniform vec3 uColor;
    uniform float uHeight;
    vec4 permute(vec4 x)
    {
        return mod(((x*34.0)+1.0)*x, 289.0);
    }

    vec2 fade(vec2 t)
    {
        return t*t*t*(t*(t*6.0-15.0)+10.0);
    }
    float cnoise(vec2 P)
    {
        vec4 Pi = floor(P.xyxy) + vec4(0.0, 0.0, 1.0, 1.0);
        vec4 Pf = fract(P.xyxy) - vec4(0.0, 0.0, 1.0, 1.0);
        Pi = mod(Pi, 289.0); // To avoid truncation effects in permutation
        vec4 ix = Pi.xzxz;
        vec4 iy = Pi.yyww;
        vec4 fx = Pf.xzxz;
        vec4 fy = Pf.yyww;
        vec4 i = permute(permute(ix) + iy);
        vec4 gx = 2.0 * fract(i * 0.0243902439) - 1.0; // 1/41 = 0.024...
        vec4 gy = abs(gx) - 0.5;
        vec4 tx = floor(gx + 0.5);
        gx = gx - tx;
        vec2 g00 = vec2(gx.x,gy.x);
        vec2 g10 = vec2(gx.y,gy.y);
        vec2 g01 = vec2(gx.z,gy.z);
        vec2 g11 = vec2(gx.w,gy.w);
        vec4 norm = 1.79284291400159 - 0.85373472095314 * vec4(dot(g00, g00), dot(g01, g01), dot(g10, g10), dot(g11, g11));
        g00 *= norm.x;
        g01 *= norm.y;
        g10 *= norm.z;
        g11 *= norm.w;
        float n00 = dot(g00, vec2(fx.x, fy.x));
        float n10 = dot(g10, vec2(fx.y, fy.y));
        float n01 = dot(g01, vec2(fx.z, fy.z));
        float n11 = dot(g11, vec2(fx.w, fy.w));
        vec2 fade_xy = fade(Pf.xy);
        vec2 n_x = mix(vec2(n00, n01), vec2(n10, n11), fade_xy.x);
        float n_xy = mix(n_x.x, n_x.y, fade_xy.y);
        return 2.3 * n_xy;
    }
    
    void main(){
    
       float strength = (vPosition.y+uHeight/2.0)/uHeight;
        gl_FragColor = vec4(uColor,1.0 - strength);
      // float strength =1.0 - abs(cnoise(vUv * 10.0)) ;
      // gl_FragColor =vec4(strength,strength,strength,1);
    }`,
    transparent: true,
    side: THREE.DoubleSide,
  });
  const lightMesh = new THREE.Mesh(box, lightMaterial);
  lightMesh.geometry.computeBoundingBox();
  const { min, max } = lightMesh.geometry.boundingBox;
  const uHeight = max.y - min.y;
  lightMaterial.uniforms.uHeight = {
    value: uHeight,
  };

  lightMaterial.uniforms.uColor = {
    value: new THREE.Color(0x00ff00),
  };

  lightMaterial.uniforms.uTime = {
    value: 0,
  };
  // gsap.to(lightMesh.scale, {
  //   // x: 2,
  //   // z: 2,
  //   y: 0.8,
  //   duration: 1,
  //   ease: 'none',
  //   repeat: -1,
  //   yoyo: true,
  // });
  scene.add(lightMesh);
};

export const setOutline = (model, group) => {
  const { scene, renderer, camera } = model;
  const params = {
    edgeStrength: 10.0,
    edgeGlow: 1,
    edgeThickness: 1.0,
    pulsePeriod: 5,
    rotate: false,
    usePatternTexture: false,
  };

  const composer = new EffectComposer(renderer);

  const renderPass = new RenderPass(scene, camera);
  composer.addPass(renderPass);

  const outlinePass = new OutlinePass(new THREE.Vector2(window.innerWidth, window.innerHeight), scene, camera);
  composer.addPass(outlinePass);

  outlinePass.visibleEdgeColor.set(parseInt(0xffffff));
  outlinePass.hiddenEdgeColor.set('#190a05');
  outlinePass.edgeStrength = params.edgeStrength;
  outlinePass.edgeThickness = params.edgeThickness;
  outlinePass.pulsePeriod = params.pulsePeriod;
  outlinePass.usePatternTexture = params.usePatternTexture;

  // const textureLoader = new THREE.TextureLoader();
  // textureLoader.load('model/hdr/tri_pattern.jpg', function (texture) {
  //   outlinePass.patternTexture = texture;
  //   texture.wrapS = THREE.RepeatWrapping;
  //   texture.wrapT = THREE.RepeatWrapping;
  // });

  const effectFXAA = new ShaderPass(FXAAShader);
  effectFXAA.uniforms['resolution'].value.set(1 / window.innerWidth, 1 / window.innerHeight);
  composer.addPass(effectFXAA);

  const scale = 1;
  group.traverse(function (child) {
    if (child instanceof THREE.Mesh) {
      // child.geometry.center();

      child.geometry.computeBoundingSphere();
    }
  });

  // group.scale.multiplyScalar(Math.random() * 0.3 + 0.1);
  group.scale.divideScalar(scale);
  return { outlinePass, composer };
};

/* 渲染视频 */
export const renderVideo = (group, player, playerMeshName) => {
  //加载视频贴图;
  const texture = new THREE.VideoTexture(player);
  if (texture && group.getObjectByName(playerMeshName)) {
    const player = group.getObjectByName(playerMeshName);
    player.material.map = texture;
  } else {
    //创建网格;
    const planeGeometry = new THREE.PlaneGeometry(30, 20);
    const material = new THREE.MeshBasicMaterial({
      map: texture,
      side: THREE.DoubleSide,
    });
    /* 消除摩尔纹 */
    texture.magFilter = THREE.LinearFilter;
    texture.minFilter = THREE.LinearFilter;
    texture.wrapS = texture.wrapT = THREE.ClampToEdgeWrapping;
    texture.format = THREE.RGBAFormat;
    texture.anisotropy = 0.5;
    // texture.generateMipmaps = false

    const mesh = new THREE.Mesh(planeGeometry, material);
    mesh.name = playerMeshName;

    // group.add(mesh);
    return mesh;
  }
};

// oldP  相机原来的位置
// oldT  target原来的位置
// newP  相机新的位置
// newT  target新的位置
// callBack  动画结束时的回调函数
export const animateCamera = (oldP, oldT, newP, newT, model, duration = 0.5) => {
  return new Promise((resolve) => {
    const camera = model.camera;
    const controls = model.orbitControls;
    controls.enabled = false;
    controls.target.set(0, 0, 0);
    const animateObj = {
      x1: oldP.x, // 相机x
      y1: oldP.y, // 相机y
      z1: oldP.z, // 相机z
      x2: oldT.x, // 控制点的中心点x
      y2: oldT.y, // 控制点的中心点y
      z2: oldT.z, // 控制点的中心点z
    };
    gsap.fromTo(
      animateObj,
      {
        x1: oldP.x, // 相机x
        y1: oldP.y, // 相机y
        z1: oldP.z, // 相机z
        x2: oldT.x, // 控制点的中心点x
        y2: oldT.y, // 控制点的中心点y
        z2: oldT.z, // 控制点的中心点z
      },
      {
        x1: newP.x,
        y1: newP.y,
        z1: newP.z,
        x2: newT.x,
        y2: newT.y,
        z2: newT.z,
        duration: duration,
        ease: 'easeOutBounce',
        onUpdate: function (object) {
          // 这里写逻辑
          camera.position.x = object.x1;
          camera.position.y = object.y1;
          camera.position.z = object.z1;
          // controls.target.x = object.x2;
          // controls.target.y = object.y2;
          // controls.target.z = object.z2;
          controls.update();
        },
        onUpdateParams: [animateObj],
        onComplete: function () {
          // 完成
          controls.enabled = true;
          resolve(null);
        },
      }
    );
  });
};

export const transScreenCoord = (vector, camera) => {
  // const screenCoord = { x: 0, y: 0 };
  // vector.project(camera);
  // screenCoord.x = (0.5 + vector.x / 2) * window.innerWidth;
  // screenCoord.y = (0.5 - vector.y / 2) * window.innerHeight;
  // return screenCoord;
  const stdVector = vector.project(camera);
  const a = window.innerWidth / 2;
  const b = window.innerHeight / 2;
  const x = Math.round(stdVector.x * a + a);
  const y = Math.round(-stdVector.y * b + b);
  return { x, y };
};

export const drawHot = (scale: number) => {
  // const hotMap = new THREE.TextureLoader().load('/src/assets/images/hot-point.png');
  // const hotMap = new THREE.TextureLoader().setPath('/model/img/').load('/hot-point.png');
  const hotMap = new THREE.TextureLoader().load('/model/img/hot-point.png');
  const material = new THREE.SpriteMaterial({
    map: hotMap,
  });
  const hotPoint = new THREE.Sprite(material);
  const spriteTween = new TWEEN.Tween({
    scale: 1 * scale,
  })
    .to(
      {
        scale: 0.65 * scale,
      },
      1000
    )
    .easing(TWEEN.Easing.Quadratic.Out);
  spriteTween.onUpdate(function (that) {
    hotPoint.scale.set(that.scale, that.scale, that.scale);
  });
  spriteTween.yoyo(true);
  spriteTween.repeat(Infinity);
  spriteTween.start();
  return hotPoint;
};

export const deviceDetailCard = () => {
  //
};