CADViewComponent/src/DrawDimension.ts

import { Box3, Matrix4, Mesh, Vector3 } from "three";
import { Dimension, GetBoxArr } from ".";


/**
 * 绘制标注实体
 *
 * @export
 * @param {Box3} box
 * @returns 标注实体列表
 */
export function DrawDimension(brList: Mesh[]): Dimension[]
{
    let box = GetBoxArr(brList);
    let size = box.getSize(new Vector3());

    let mat4 = new Matrix4();
    mat4.makeBasis(
        new Vector3(-1, 0, 0),
        new Vector3(0, -1, 0),
        new Vector3(0, 0, 1)
    )
    mat4.setPosition(box.min.clone().add(new Vector3(size.x, -30)));

    let textHeight = 45;
    let dimx = new Dimension(size.x, textHeight, true);
    dimx.applyMatrix4(mat4);

    let dimz = new Dimension(size.z, textHeight);
    mat4.makeBasis(
        new Vector3(0, 0, -1),
        new Vector3(1, 0, 0),
        new Vector3(0, -1, 0)
    )
    mat4.setPosition(box.max.clone().add(new Vector3(30, -size.y)));
    dimz.applyMatrix4(mat4);

    let dimy = new Dimension(size.y, textHeight, true, true);
    mat4.makeBasis(
        new Vector3(0, 1, 0),
        new Vector3(-1, 0, 0),
        new Vector3(0, 0, 1)
    )
    mat4.setPosition(box.max.clone().add(new Vector3(30, -size.y)));
    dimy.applyMatrix4(mat4);


    return [dimx, dimy, dimz];
}