//
// import {Rectangle} from "@lazycollect-src/domain/Rectangle";
// import {Point} from "@lazycollect-src/domain/Point";
// import {Obj} from "@lazycollect-src/object/obj/Obj";
// // import {engine} from "@lazycollect-src/index";
// import {MathUtil} from "@lazycollect-src/math/MathUtil";
// import {Optional} from "@lazycollect-src/optional/Optional";
// const {range, fromEvent, interval, Observable, of, Subscription, timer} = require('rxjs');
// import {config} from "@lazycollect-src/config";
// import {DrawObj} from "@lazycollect-src/object/obj/DrawObj";
// import {PointVector} from "@lazycollect-src/domain/PointVector";
// import {Draw} from "@lazycollect-src/draw/Draw";
//
// export class TriangleObj extends DrawObj {
//
//
//     constructor(public percentPoint: PointVector, public mass: number, public fillStyle: string, public strokeStyle: string) {
//         super();
//     }
//
//     draw(draw: Draw) {
//
//         // Filled triangle
//         // ctx.beginPath();
//         // ctx.moveTo(25, 25);
//         // ctx.lineTo(105, 25);
//         // ctx.lineTo(25, 105);
//         // ctx.fill();
//
//         // Stroked triangle
//         draw.context.beginPath();
//         let startX = MathUtil.getValueByTotInPercent(draw.canvas.width, draw.avaliablePlace.start.x);
//         let startY = MathUtil.getValueByTotInPercent(draw.canvas.height, draw.avaliablePlace.start.y);
//         let endX = MathUtil.getValueByTotInPercent(draw.canvas.width, draw.avaliablePlace.end.x);
//         let endY = MathUtil.getValueByTotInPercent(draw.canvas.height, draw.avaliablePlace.end.y);
//         draw.context.moveTo(startX, startY);
//         draw.context.lineTo(endX, endY);
//         draw.context.lineTo(startX, endY);
//         draw.context.closePath();
//         draw.context.stroke();
//         draw.context.font = '20px serif';
//         draw.context.textAlign = "center";
//         draw.context.textBaseline = "middle";
//
//         let yGap = Math.abs(endY - startY);
//         let xGap = Math.abs(endX - startX);
//         let mGap = Math.sqrt(Math.pow(yGap, 2) + Math.pow(xGap, 2));
//         draw.context.fillText("|"+yGap.toFixed(3), startX,  startY + ((yGap) / 2));
//
//         draw.context.fillText("\\"+mGap.toFixed(3), startX + (xGap / 2),  startY + ((yGap) / 2));
//
//         draw.context.textBaseline = "top";
//         draw.context.fillText("_"+xGap.toFixed(3), startX + (xGap / 2),  endY);
//
//         // 기울기
//         // https://ko.wikihow.com/%EC%A7%81%EC%84%A0%EC%9D%98-%EA%B8%B0%EC%9A%B8%EA%B8%B0-%EA%B5%AC%ED%95%98%EB%8A%94-%EB%B2%95
//         // https://ko.khanacademy.org/math/cc-eighth-grade-math/cc-8th-linear-equations-functions/8th-slope/a/slope-formula
//         // http://m.ebsmath.co.kr/resource/rscView;jsessionid=dF1YRqf9y5ErOvRxl6w10o9gahO02xKQ92W6cMYlRx5ChNyZVmimrB1Q18saM4oE?cate=10096&cate2=10149&cate3=10155&rscTpDscd=RTP10&grdCd=MGRD02&sno=22097&historyYn=study&ts=ts&isBot=false&viaType=I&isGalaxyS=false&isWin10=false&isAndroid=false&isLG=false&isIOS=false&currentDate=20201028171444&ieVersion=&isMobile=false&isIE=false&userOs=etc&isIOSChrome53=false&remoteIp=112.217.122.28&ieSquare=&prefixURLCheck=REAL&histSeq=7749484&urlSno=16580&userBrowser=chrome&isLoginChk=N&html5Support=true&isHtml5Support=true
//         // https://ko.khanacademy.org/math/cc-eighth-grade-math/cc-8th-linear-equations-functions/8th-slope/v/converting-to-slope-intercept-form
//     }
//
// }