mirror of https://gitee.com/cf-fz/WebCAD.git
ChenX
7 years ago
parent
0c019f4450
commit
26989e59e1
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import * as THREE from 'three';
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import { app } from '../ApplicationServices/Application';
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import { ColorMaterial } from '../Common/ColorPalette';
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import { GetPointPrompt } from '../Common/InputState';
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import { Entity } from '../DatabaseServices/Entity';
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import { equaln, fixAngle, Intersect, polar } from '../Geometry/GeUtils';
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import { PreViewer } from '../GraphicsSystem/PreViewer';
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//捕捉轴
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interface SnapAxis
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{
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BasePoint: THREE.Vector3;//基点
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SnapPoint: THREE.Vector3;//捕捉到的点
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}
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//轴线相交数据
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interface SnapIntersect
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{
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IntersectPoint: THREE.Vector3;
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Axis1: SnapAxis;
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Axis2: SnapAxis;
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}
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//提供点捕捉的服务.
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export class SnapServices
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{
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private preLines: THREE.Line[] = []; //前视图绘制的线表
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notSnapEntity = new Set<THREE.Object3D>();//不参与捕捉的实体列表,这个属性由开发人员维护.
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private snapPoints: THREE.Vector3[] = [];//捕捉的点列表
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//开始捕捉
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Start(prompt: GetPointPrompt)
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{
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if (prompt.BasePoint) this.snapPoints.push(prompt.BasePoint);
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}
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//结束捕捉服务
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Stop()
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{
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this.DestroySnapLine();
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this.snapPoints.length = 0;
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}
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GetSnapPoint(wcsP: THREE.Vector3)
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{
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let preView = app.m_Viewer.m_PreViewer;
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this.DestroySnapLine();
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this.DrawSnapCross(preView);
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return this.GetEntitySnapPoint() || this.GetAxisSnapPoint(wcsP);
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}
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//-------------------计算函数//-------------------
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//根据角度进行轴线捕捉,如果存在捕捉,那么返回捕捉点
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private AxisSnap(basePoint: THREE.Vector3, fixAn: number): THREE.Vector3
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{
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let wcs = app.m_Editor.m_MouseCtrl.m_CurMousePointWCS.clone();
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//相差向量
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let subVec = wcs.clone().sub(basePoint);
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let an = Math.atan2(subVec.y, subVec.x);
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if (an < 0) an += Math.PI * 2;
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let newan = fixAngle(an, fixAn);
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if (!equaln(newan, an, 0.001))
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{
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//dis.
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let v0 = new THREE.Vector3(0, 0, 0);
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polar(v0, newan, 1);
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let dis = v0.dot(wcs.sub(basePoint));
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let retP = basePoint.clone();
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polar(retP, newan, dis);
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return retP;
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}
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return undefined;
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}
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//返回合适的轴线交点,如果不存在交点,那么返回轴线上的点
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private GetAxisSnapPoint(wcsP: THREE.Vector3)
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{
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//轴线列表
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let snapAxisList: SnapAxis[] = this.snapPoints.map((p) =>
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{
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let snapPoint = this.AxisSnap(p, Math.PI * 0.5);
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return { BasePoint: p, SnapPoint: snapPoint };
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}).filter(a => a.SnapPoint);
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if (snapAxisList.length === 0)
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return;
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//检测交点
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let axisIntersectList: SnapIntersect[] = [];
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for (let i = 0; i < snapAxisList.length; i++)
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{
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let axis1 = snapAxisList[i];
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for (let j = i + 1; j < snapAxisList.length; j++)
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{
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let axis2 = snapAxisList[j];
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let insP = Intersect(axis1.BasePoint, axis1.SnapPoint, axis2.BasePoint, axis2.SnapPoint);
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if (insP)
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axisIntersectList.push({
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IntersectPoint: insP,
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Axis1: axis1,
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Axis2: axis2
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});
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}
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}
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//如果存在交点 那么找到最近的交点
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if (axisIntersectList.length > 0)
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{
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axisIntersectList.sort((d1, d2) =>
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{
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return d1.IntersectPoint.distanceTo(wcsP) < d2.IntersectPoint.distanceTo(wcsP) ? -1 : 1;
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});
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let insData = axisIntersectList[0];
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if (insData.IntersectPoint.distanceToSquared(wcsP) < 100)
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{
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this.DrawLine(insData.Axis1.BasePoint, insData.IntersectPoint, app.m_Viewer.m_PreViewer.m_BlueDashMaterial);
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this.DrawLine(insData.Axis2.BasePoint, insData.IntersectPoint, app.m_Viewer.m_PreViewer.m_BlueDashMaterial);
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this.DrawBaisCross(insData.IntersectPoint);
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return insData.IntersectPoint.clone();
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}
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}
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else
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{
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snapAxisList.sort((d1, d2) =>
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{
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return d1.SnapPoint.distanceTo(wcsP) < d2.SnapPoint.distanceTo(wcsP) ? -1 : 1;
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});
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let snapAxis = snapAxisList[0];
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this.DrawLine(snapAxis.BasePoint, snapAxis.SnapPoint, app.m_Viewer.m_PreViewer.m_BlueDashMaterial);
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return snapAxis.SnapPoint;
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}
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}
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//计算图形的捕捉点 如果有 则返回.
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private GetEntitySnapPoint()
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{
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let vcsP = app.m_Editor.m_MouseCtrl.m_CurMousePointVCS;
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for (let obj of app.m_Viewer.m_Scene.children)
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{
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if (!this.notSnapEntity.has(obj) && obj.userData && obj.userData instanceof Entity)
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{
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for (let p of obj.userData.GetSnapPoints())
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{
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let pv = p.clone();
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app.m_Viewer.WorldToScreen(pv);
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if (pv.distanceToSquared(vcsP) < 100)
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{
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if (!this.snapPoints.some(sp => { return sp.distanceToSquared(p) < 1e-5 }))
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{
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this.snapPoints.push(p);
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if (this.snapPoints.length > 7) this.snapPoints.shift();
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}
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this.DrawSquare(p, 10);
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return p.clone();
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}
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}
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}
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}
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}
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//-------------------绘制函数-------------------
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//绘制十字光标列表
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private DrawSnapCross(preView: PreViewer)
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{
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for (let snapP of this.snapPoints)
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{
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let lines = preView.DrawCross(5, preView.m_BlueDashMaterial);
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let p = snapP.clone();
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app.m_Viewer.WorldToScreen(p);
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preView.ScreenPointToViewerPoint(p);
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let move = new THREE.Matrix4();
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move.setPosition(p);
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for (let l of lines)
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{
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l.applyMatrix(move);
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this.preLines.push(l);
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preView.Scene.add(l);
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}
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}
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}
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//绘制 x光标 轴线捕捉
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private DrawBaisCross(ptWcs: THREE.Vector3)
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{
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let lines = app.m_Viewer.m_PreViewer.DrawBiasCross(10, ColorMaterial.GetLineMaterial(3));
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let preView = app.m_Viewer.m_PreViewer;
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let pv = this.WorldToViewPoint(ptWcs);
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let move = new THREE.Matrix4().makeTranslation(pv.x, pv.y, pv.z);
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lines.forEach(l => { l.applyMatrix(move) });
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this.preLines.push(...lines);
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preView.Scene.add(...lines);
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}
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//绘制正方形
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private DrawSquare(ptWcs: THREE.Vector3, size: number)
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{
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let pv = this.WorldToViewPoint(ptWcs);
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let addV = new THREE.Vector3(size * 0.5, size * 0.5, 0);
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let p1 = pv.clone().sub(addV);
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let p3 = pv.clone().add(addV)
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addV.x *= -1;
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let p2 = pv.clone().add(addV);
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let p4 = pv.clone().sub(addV);
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let preView = app.m_Viewer.m_PreViewer;
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let material = app.m_Viewer.m_PreViewer.m_SnapMaterial;
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let lines = [
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preView.DrawLine(p1, p2, material),
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preView.DrawLine(p2, p3, material),
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preView.DrawLine(p3, p4, material),
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preView.DrawLine(p1, p4, material)
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]
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this.preLines.push(...lines);
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preView.Scene.add(...lines);
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}
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private WorldToViewPoint(pWcs: THREE.Vector3)
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{
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let preView = app.m_Viewer.m_PreViewer;
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let pv = pWcs.clone();
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app.m_Viewer.WorldToScreen(pv);
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preView.ScreenPointToViewerPoint(pv);
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return pv;
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}
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//在preView中绘制 临时的线段 wcs
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private DrawLine(p1: THREE.Vector3, p2: THREE.Vector3, material?: THREE.LineBasicMaterial | THREE.LineDashedMaterial)
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{
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if (p1.distanceToSquared(p2) > 0.001)
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{
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let preView = app.m_Viewer.m_PreViewer;
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let l = preView.DrawLineFromWcs(p1.clone(), p2.clone(), material);
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this.preLines.push(l);
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preView.Scene.add(l);
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}
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}
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//销毁绘制的函数
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private DestroySnapLine()
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{
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this.preLines.forEach(l =>
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{
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l.parent.remove(l);
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l.geometry.dispose();
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})
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this.preLines.length = 0;
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}
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}
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@ -1,16 +0,0 @@
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import { ApplicationService } from '../ApplicationServices/Application';
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/**
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* 提供捕捉的服务.
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*
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* @class SnapServices
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*/
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export class SnapServices
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{
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constructor(app: ApplicationService)
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{
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}
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}
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