分离模型

objects/螺丝帽.js

@@ -0,0 +1,35 @@
+import * as THREE from 'three';
+import { SUBTRACTION, Brush, Evaluator } from 'three-bvh-csg';
+
+export class 六角螺丝帽 extends THREE.BufferGeometry {
+    constructor(radius = 1, height = 0.5, holeRadius = 0.6) {
+        super();
+
+        this.parameters = {
+            radius: radius,
+            height: height,
+            holeRadius: holeRadius
+        };
+
+        this.buildGeometry();
+    }
+
+    buildGeometry() {
+        const { radius, height, holeRadius } = this.parameters;
+
+        // 创建螺丝帽主体 (六棱柱)
+        const hexagonBrush = new Brush(new THREE.CylinderGeometry(radius, radius, height, 6));
+
+        // 创建内部的孔洞 (圆柱体)
+        const holeBrush = new Brush(new THREE.CylinderGeometry(holeRadius, holeRadius, height + 0.1, 128));
+
+        // 执行布尔运算 (差集)
+        const resultBrush = new Evaluator().evaluate(hexagonBrush, holeBrush, SUBTRACTION);
+
+        // 将布尔运算结果应用到当前 BufferGeometry
+        this.copy(resultBrush.geometry);
+        this.computeVertexNormals(); // 计算法线
+    }
+}
+
+export default { 六角螺丝帽 };