我如何使用Quickhull与Three.js求和两个几何？

Question

我对Quickhull扩展名感到困惑。如何找到两个物体的凸包？翻译后我需要将它们脱壳，所以也许我需要翻译实际的顶点而不是简单地改变位置？找不到有关此扩展程序的任何文档，因此感谢那些知道的人提供的帮助。

Answer 1

您必须将网格合并在一起，然后获取该meshes.geometry的ConvexHull。

var box = new THREE.BoxGeometry(1, 1, 1);
var sphere = new THREE.SphereGeometry(.65, 32, 32);
sphere.position.x = 4;
var singleGeometry = new THREE.Geometry();

var boxMesh = new THREE.Mesh(box);
var sphereMesh = new THREE.Mesh(sphere);

boxMesh.updateMatrix(); // as needed
singleGeometry.merge(boxMesh.geometry, boxMesh.matrix);

sphereMesh.updateMatrix(); // as needed
singleGeometry.merge(sphereMesh.geometry, sphereMesh.matrix);

var material = new THREE.MeshPhongMaterial({color: 0xFF0000});
var mesh = new THREE.Mesh(singleGeometry, material);

if(mesh.geometry.type==='BufferGeometry')mesh.geometry = new THREE.Geometry().fromBufferGeometry(mesh.geometry);
mesh.geometry = new THREE.ConvexGeometry(mesh.geometry.vertices);
scene.add(mesh);