59 lines
2.2 KiB
JavaScript
59 lines
2.2 KiB
JavaScript
import * as THREE from 'three';
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import { SUBTRACTION, ADDITION, Brush, Evaluator } from 'three-bvh-csg';
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export class 方形育苗盘 extends THREE.BufferGeometry {
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constructor(width = 0.6, depth = 0.4, height = 0.01, holeDiameter = 0.02, holeRadius = .1, holeRows = 20, holeCols = 12, rowSpacing = .01, colSpacing = .01) {
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super();
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this.parameters = {
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width: width,
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depth: depth,
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height: height,
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holeDiameter: holeDiameter,
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holeRadius: holeRadius,
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holeRows: holeRows,
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holeCols: holeCols,
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rowSpacing: rowSpacing,
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colSpacing: colSpacing
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};
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this.buildGeometry();
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}
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buildGeometry() {
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const { width, depth, height, holeDiameter, holeRows, holeCols, rowSpacing, colSpacing } = this.parameters;
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// 创建长方体主体
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const baseBrush = new Brush(new THREE.BoxGeometry(width, height, depth));
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const holes = [];
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for (let i = 0; i < holeRows; i++) {
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for (let j = 0; j < holeCols; j++) {
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// 计算每个孔洞的中心位置
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const x = -(width / 2) + rowSpacing * (i + 1) + holeDiameter * (i + 0.5);
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const z = -(depth / 2) + colSpacing * (j + 1) + holeDiameter * (j + 0.5);
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const holeGeometry = new THREE.BoxGeometry(holeDiameter, height, holeDiameter);
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const holeBrush = new Brush(holeGeometry);
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holeBrush.geometry.translate(x, 0, z);
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holes.push(holeBrush);
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}
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}
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// 计算所有孔洞的合并结果
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let combinedHoles = holes[0];
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for (let i = 1; i < holes.length; i++) {
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combinedHoles = new Evaluator().evaluate(combinedHoles, holes[i], ADDITION);
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}
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// 执行布尔运算 (差集)
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const resultBrush = new Evaluator().evaluate(baseBrush, combinedHoles, SUBTRACTION);
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// 将布尔运算结果应用到当前 BufferGeometry
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this.copy(resultBrush.geometry);
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this.computeVertexNormals(); // 计算法线
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}
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}
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export class 蜂窝育苗盘 extends THREE.BufferGeometry { }
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export default { 方形育苗盘, 蜂窝育苗盘 }; |