108 lines
3.0 KiB
TypeScript
108 lines
3.0 KiB
TypeScript
import { EdgesGeometry, Geometry, LineSegments, MeshBasicMaterial, Shape, Vector2 } from 'three';
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import { polar } from './GeUtils';
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import { edgeMaterial } from './Material';
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import { SimpleBoard } from './SimpleBoard';
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//解析二维圆弧类.
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export class Arc2d
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{
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m_StartAn: number;
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m_EndAn: number;
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m_StartPoint: Vector2;
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m_EndPoint: Vector2;
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m_Center: Vector2;
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m_Radius: number;
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constructor(p1: Vector2, p2: Vector2, bul: number)
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{
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this.m_StartPoint = p1.clone();
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this.m_EndPoint = p2.clone();
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let vec: Vector2 = p2.clone().sub(p1);
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let len = vec.length();
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let an = vec.angle();
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this.m_Radius = len / Math.sin(2 * Math.atan(bul)) / 2;
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let allAngle = Math.atan(bul) * 4;
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let delDis = bul * len / 2;
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let toDis = this.m_Radius - delDis;
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an += Math.PI * 0.5;
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this.m_Center = p1.clone().add(p2);
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this.m_Center.multiplyScalar(0.5);
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polar(this.m_Center, an, toDis);
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this.m_StartAn = p1.clone().sub(this.m_Center).angle();
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this.m_EndAn = p2.clone().sub(this.m_Center).angle();
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if (bul < 0)
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{
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//一个神奇的特性 它需要这么做
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this.m_StartAn -= Math.PI;
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this.m_EndAn -= Math.PI;
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}
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}
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}
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//创建轮廓 通过点表和凸度
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export function createPath(pts: Vector2[], buls: number[], shapeOut?: Shape): Shape
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{
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let shape = shapeOut || new Shape();
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if (pts.length === 0) return shape;
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let firstPt = pts[0];
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shape.moveTo(firstPt.x, firstPt.y);
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for (let i = 0; i < pts.length - 1; i++)
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{
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let nextPt = pts[i + 1];
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if (buls[i] == 0)
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{
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shape.lineTo(nextPt.x, nextPt.y);
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}
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else
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{
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let pt = pts[i];
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//参考
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//http://www.dorodnic.com/blog/tag/three-js/ 绘制一个齿轮
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//https://www.kirupa.com/html5/drawing_circles_canvas.htm //html5
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let arc2 = new Arc2d(pt, nextPt, buls[i]);
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let cen = arc2.m_Center;
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shape.absarc(cen.x, cen.y, arc2.m_Radius, arc2.m_StartAn, arc2.m_EndAn, buls[i] < 0);
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}
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}
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return shape;
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}
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//创建板件 暂时这么写
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export function createTemplateBoard(brDataList: any[], material: MeshBasicMaterial)
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{
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let meshs = [];
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let edgesa = [];
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let relations = {
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blockMeshMap: new Map<number, number>(),
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meshBlockMap: new Map<number, number>()
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};
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for (let d of brDataList)
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{
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let board = new SimpleBoard(d);
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let { mesh, edges } = board.createBoard(material);
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meshs.push(mesh);
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edgesa.push(...edges);
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if (board.DataID)
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{
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relations.blockMeshMap.set(board.DataID, mesh.id);
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relations.meshBlockMap.set(mesh.id, board.DataID);
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}
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}
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return { meshs, edgesa, relations };
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}
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export function createEdge(geo: Geometry): LineSegments
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{
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let edge = new EdgesGeometry(geo, 1);
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return new LineSegments(edge, edgeMaterial);
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}
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