ThreeJS：将 DecalGeometry 添加到分组对象中

Question

有一个基于 原始 ThreeJS DecalGeometry 示例的小草图，它工作得很好。基本上，它必须通过 X 轴垂直

[{0, 0, 0}, {tankRadius, 0, 0}]

将徽标添加到坦克中心，并且通过

scene.add(...)

将所有内容直接添加到场景中。

当我尝试将所有对象移动到一个组中时出现问题

THREE.Group()

，根据设计，该组应该具有预定义的旋转和缩放，即

group.rotation.y = -Math.PI / 4;

。

body {
    
    margin: 0;
    background-color: #fff;
    font-family: Monospace;
    font-size: 13px;
    line-height: 24px;
    overscroll-behavior: none;
    
}

<div id="container"></div>

    <script type="module">

      import * as THREE from "https://cdn.jsdelivr.net/npm/[email protected]/build/three.module.js";
      import { OrbitControls } from "https://cdn.jsdelivr.net/npm/[email protected]/examples/jsm/controls/OrbitControls.js";
        import { DecalGeometry } from "https://cdn.jsdelivr.net/npm/[email protected]/examples/jsm/geometries/DecalGeometry.js";

    const logo = 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';

    class TankGeometry extends THREE.LatheGeometry {

        constructor(radius = 1, length = 1, capSegments = 4, radialSegments = 8) {

            const path = new THREE.Path();

            path.absellipse(0, -length / 2, radius, radius / 2, Math.PI * 1.5, 0);
            path.absellipse(0, length / 2, radius, radius / 2, 0, Math.PI * 0.5);

            super(path.getPoints(capSegments), radialSegments);

            this.type = 'TankGeometry';

            this.parameters = {

                radius: radius,
                length: length,
                capSegments: capSegments,
                radialSegments: radialSegments,

            };

        }

        static fromJSON(data) {
            return new TankGeometry(data.radius, data.length, data.capSegments, data.radialSegments);
        }

    }

    let renderer, scene, camera, controls, group, tank, line, raycaster, intersects = [];

  const container = document.getElementById('container');

  const intersection = {

      intersects: false,
      point: new THREE.Vector3(),
      normal: new THREE.Vector3()

  };

  const tankParameters = {
      radius: 11,
      width: 75
  };

  const decalMaterial = new THREE.MeshPhongMaterial({

      map: new THREE.TextureLoader().load(logo),
      normalScale: new THREE.Vector2(1, 1),
      shininess: 30,
      transparent: true,
      depthTest: true,
      depthWrite: true,
      polygonOffset: true,
      polygonOffsetFactor: -2,
      wireframe: false

  });

  const decals = [];

  let position = new THREE.Vector3();
  let orientation = new THREE.Euler();

  init(aftermath);

  checkIntersection(window.innerWidth / 2, window.innerHeight / 2);

  function aftermath() {

      renderer.render(scene, camera);

      checkIntersection(window.innerWidth / 2, window.innerHeight / 2);
      if (intersection.intersects) {
          addDecal();
      }

      animate();


  }

  function init(callback_) {

      renderer = new THREE.WebGLRenderer({
          antialias: true
      });
      renderer.setPixelRatio(window.devicePixelRatio);
      renderer.setSize(window.innerWidth, window.innerHeight);
      container.appendChild(renderer.domElement);

      scene = new THREE.Scene();
      scene.background = new THREE.Color(0xFFFFFF);

      camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 1, 1000);
      camera.position.z = 120;

      const controls = new OrbitControls(camera, renderer.domElement);
      controls.minDistance = 50;
      controls.maxDistance = 200;

      scene.add(new THREE.AmbientLight(0x333333));

      const dirLight = new THREE.DirectionalLight(0x999999, 3);
      dirLight.position.set(1, 0.75, 0.5);
      scene.add(dirLight);

      group = new THREE.Group();
      group.rotation.y = -Math.PI / 4;
      scene.add(group);

      const lineGeometry = new THREE.BufferGeometry();
      lineGeometry.setFromPoints([new THREE.Vector3(0.0, 0.0, 0.0), new THREE.Vector3(16.0, 0.0, 0.0)]);
      line = new THREE.Line(lineGeometry, new THREE.LineBasicMaterial({
          color: 0xFF0000
      }));
      group.add(line);

      tank = new THREE.Mesh(new TankGeometry(tankParameters.radius, tankParameters.width, 16, 16), new THREE.MeshBasicMaterial({
          color: 0xDDDDDD
      }));
      tank.geometry.computeVertexNormals();
      tank.rotation.x = Math.PI / 2;
      tank.name = 'Tank';
      group.add(tank);

      raycaster = new THREE.Raycaster();
      raycaster.setFromCamera(new THREE.Vector2(0, 0), camera);

      window.addEventListener('resize', onWindowResize);

      let moved = false;

      callback_();

  }

  function checkIntersection(x, y) {

      if (tank === undefined) {
          return;
      }

      raycaster.setFromCamera(new THREE.Vector2(0, 0), camera);

      raycaster.intersectObject(tank, false, intersects);

      if (intersects.length > 0) {

          intersection.normal.copy(intersects[0].face.normal);

          intersection.intersects = true;

          intersects.length = 0;

      } else {

          intersection.intersects = false;

      }


  }

  function addDecal() {

      const scale = tankParameters.width;
      const size = new THREE.Vector3(scale, scale, scale * 0.5);

      orientation = new THREE.Euler(-Math.PI / 2, Math.PI / 2, Math.PI / 2, 'XYZ');
      position = new THREE.Vector3(tankParameters.radius, 0.0, 0.0);

      const m = new THREE.Mesh(new DecalGeometry(tank, position, orientation, size), decalMaterial);
      m.renderOrder = 0;
      m.name = 'decalLogo';
      group.add(m);

  }

  function removeDecal() {
      scene.remove(scene.getObjectByName('decalLogo'));
  }

  function onWindowResize() {

      camera.aspect = window.innerWidth / window.innerHeight;
      camera.updateProjectionMatrix();

      renderer.setSize(window.innerWidth, window.innerHeight);

  }

  function animate() {

      requestAnimationFrame(animate);
      renderer.render(scene, camera);

  }

    </script>

很明显，

THREE.Raycaster

应该以某种方式考虑群矩阵，但我所有插入它的尝试，例如在

checkIntersection(x, y)

处，都没有产生结果。

有什么想法吗？

Answer 1

其实我不需要

THREE.Raycaster

和

checkIntersection()

，而贴花的位置是一成不变的。

body {
    
    margin: 0;
    background-color: #fff;
    font-family: Monospace;
    font-size: 13px;
    line-height: 24px;
    overscroll-behavior: none;
    
}

<div id="container"></div>

    <script type="module">

      import * as THREE from "https://cdn.jsdelivr.net/npm/[email protected]/build/three.module.js";
      import { OrbitControls } from "https://cdn.jsdelivr.net/npm/[email protected]/examples/jsm/controls/OrbitControls.js";
      import { DecalGeometry } from "https://cdn.jsdelivr.net/npm/[email protected]/examples/jsm/geometries/DecalGeometry.js";

    const logo = 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';

    class TankGeometry extends THREE.LatheGeometry {

        constructor(radius = 1, length = 1, capSegments = 4, radialSegments = 8) {

            const path = new THREE.Path();

            path.absellipse(0, -length / 2, radius, radius / 2, Math.PI * 1.5, 0);
            path.absellipse(0, length / 2, radius, radius / 2, 0, Math.PI * 0.5);

            super(path.getPoints(capSegments), radialSegments);

            this.type = 'TankGeometry';

            this.parameters = {

                radius: radius,
                length: length,
                capSegments: capSegments,
                radialSegments: radialSegments,

            };

        }

        static fromJSON(data) {
            return new TankGeometry(data.radius, data.length, data.capSegments, data.radialSegments);
        }

    }

    let renderer, scene, camera, controls, group, tank, line, intersects = [];

  const container = document.getElementById('container');

  const tankParameters = {
      radius: 11,
      width: 75
  };

  const decalMaterial = new THREE.MeshPhongMaterial({

      map: new THREE.TextureLoader().load(logo),
      normalScale: new THREE.Vector2(1, 1),
      shininess: 30,
      transparent: true,
      depthTest: true,
      depthWrite: true,
      polygonOffset: true,
      polygonOffsetFactor: -2,
      wireframe: false

  });

  const decals = [];

  let position = new THREE.Vector3();
  let orientation = new THREE.Euler();

  init(aftermath);

  function aftermath() {

      renderer.render(scene, camera);

      addDecal();
      
      animate();


  }

  function init(callback_) {

      renderer = new THREE.WebGLRenderer({
          antialias: true
      });
      renderer.setPixelRatio(window.devicePixelRatio);
      renderer.setSize(window.innerWidth, window.innerHeight);
      container.appendChild(renderer.domElement);

      scene = new THREE.Scene();
      scene.background = new THREE.Color(0xFFFFFF);

      camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 1, 1000);
      camera.position.z = 120;

      const controls = new OrbitControls(camera, renderer.domElement);
      controls.minDistance = 50;
      controls.maxDistance = 200;

      scene.add(new THREE.AmbientLight(0x333333));

      const dirLight = new THREE.DirectionalLight(0x999999, 3);
      dirLight.position.set(1, 0.75, 0.5);
      scene.add(dirLight);

      group = new THREE.Group();
      group.rotation.y = -Math.PI / 4;
      scene.add(group);

      const lineGeometry = new THREE.BufferGeometry();
      lineGeometry.setFromPoints([new THREE.Vector3(0.0, 0.0, 0.0), new THREE.Vector3(16.0, 0.0, 0.0)]);
      line = new THREE.Line(lineGeometry, new THREE.LineBasicMaterial({
          color: 0xFF0000
      }));
      group.add(line);

      tank = new THREE.Mesh(new TankGeometry(tankParameters.radius, tankParameters.width, 16, 16), new THREE.MeshBasicMaterial({
          color: 0xDDDDDD
      }));
      tank.geometry.computeVertexNormals();
      tank.rotation.x = Math.PI / 2;
      tank.name = 'Tank';
      group.add(tank);

      window.addEventListener('resize', onWindowResize);

      callback_();

  }

  function addDecal() {

      const scale = tankParameters.width;
      const size = new THREE.Vector3(scale, scale, scale * 0.5);

      orientation = new THREE.Euler(-Math.PI / 2, Math.PI / 2, Math.PI / 2, 'XYZ');
      position = new THREE.Vector3(tankParameters.radius, 0.0, 0.0);

      const m = new THREE.Mesh(new DecalGeometry(tank, position, orientation, size), decalMaterial);
      m.renderOrder = 0;
      m.name = 'decalLogo';
      group.add(m);

  }

  function removeDecal() {
      scene.remove(scene.getObjectByName('decalLogo'));
  }

  function onWindowResize() {

      camera.aspect = window.innerWidth / window.innerHeight;
      camera.updateProjectionMatrix();

      renderer.setSize(window.innerWidth, window.innerHeight);

  }

  function animate() {

      requestAnimationFrame(animate);
      renderer.render(scene, camera);

  }

    </script>

所以，问题在于重新计算

orientation

和

position

处的

addDecal()

。