import { Font, FontLoader, Mesh, ShapeGeometry, Vector3 } from "three";
import { ColorMaterial } from "./ColorPalette";
import { MoveMatrix } from "./GeUtils";


class FontLoaderUtil
{
    private static defFont:Font;
    static Load():Font
    {
        if(!this.defFont)
        {
            const f = require("../node_modules/three/examples/fonts/helvetiker_regular.typeface.json");
            let loader = new FontLoader();
            this.defFont = loader.parse(f);
        }
        return this.defFont;
    }
}

export class DbText extends Mesh
{
    /**
     * 
     * 构造一个文本对象,8位点(中心点下面)在0点
     * @param {string} str 数字字符串
     * @param {number} height 文本高度
     * @memberof DbText
     */
    constructor(str:string,height:number = 5)
    {

        let font = FontLoaderUtil.Load();

        let shapes: THREE.Shape[] = font.generateShapes(str, height,0.1);
        let geometry = new ShapeGeometry(shapes);

        geometry.computeBoundingBox();

        super(geometry,ColorMaterial.GetLineMaterial(5));

        let center = geometry.boundingBox.getCenter(new Vector3());
        this.applyMatrix(MoveMatrix(new Vector3(-center.x,0,0)));
    }
}