three-stdlib/geometries/BoxLineGeometry.js

stand-alone library of threejs examples

import { BufferGeometry, Float32BufferAttribute } from "three";
class BoxLineGeometry extends BufferGeometry {
  constructor(width, height, depth, widthSegments, heightSegments, depthSegments) {
    super();
    width = width || 1;
    height = height || 1;
    depth = depth || 1;
    widthSegments = Math.floor(widthSegments) || 1;
    heightSegments = Math.floor(heightSegments) || 1;
    depthSegments = Math.floor(depthSegments) || 1;
    const widthHalf = width / 2;
    const heightHalf = height / 2;
    const depthHalf = depth / 2;
    const segmentWidth = width / widthSegments;
    const segmentHeight = height / heightSegments;
    const segmentDepth = depth / depthSegments;
    const vertices = [];
    let x = -widthHalf, y = -heightHalf, z = -depthHalf;
    for (let i = 0; i <= widthSegments; i++) {
      vertices.push(x, -heightHalf, -depthHalf, x, heightHalf, -depthHalf);
      vertices.push(x, heightHalf, -depthHalf, x, heightHalf, depthHalf);
      vertices.push(x, heightHalf, depthHalf, x, -heightHalf, depthHalf);
      vertices.push(x, -heightHalf, depthHalf, x, -heightHalf, -depthHalf);
      x += segmentWidth;
    }
    for (let i = 0; i <= heightSegments; i++) {
      vertices.push(-widthHalf, y, -depthHalf, widthHalf, y, -depthHalf);
      vertices.push(widthHalf, y, -depthHalf, widthHalf, y, depthHalf);
      vertices.push(widthHalf, y, depthHalf, -widthHalf, y, depthHalf);
      vertices.push(-widthHalf, y, depthHalf, -widthHalf, y, -depthHalf);
      y += segmentHeight;
    }
    for (let i = 0; i <= depthSegments; i++) {
      vertices.push(-widthHalf, -heightHalf, z, -widthHalf, heightHalf, z);
      vertices.push(-widthHalf, heightHalf, z, widthHalf, heightHalf, z);
      vertices.push(widthHalf, heightHalf, z, widthHalf, -heightHalf, z);
      vertices.push(widthHalf, -heightHalf, z, -widthHalf, -heightHalf, z);
      z += segmentDepth;
    }
    this.setAttribute("position", new Float32BufferAttribute(vertices, 3));
  }
}
export {
  BoxLineGeometry
};
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