50 lines
7.2 KiB
JavaScript
50 lines
7.2 KiB
JavaScript
import * as THREE from 'three';
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export function framePose(box,aspect,{direction=[.6,.8,1],padding=1.2,fov=42}={}){
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if(box.isEmpty())throw Error('视角目标没有可见模型。');
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const sphere=box.getBoundingSphere(new THREE.Sphere()),angle=Math.min(fov*Math.PI/360,Math.atan(Math.tan(fov*Math.PI/360)*aspect));
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const distance=Math.max(2,sphere.radius)*padding/Math.sin(angle);return {target:sphere.center.toArray(),position:sphere.center.clone().add(new THREE.Vector3(...direction).normalize().multiplyScalar(distance)).toArray()};
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}
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export function createCameraNavigation({camera,controls,model,networkRoot,root,show,getMode,appearance,onChange,getDisplayMode=()=> 'global',setDisplayMode=()=>{}}){
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const presets=[{id:'overview',label:'供水总览',mode:'network',note:'完整管网与站区背景'},{id:'plan',label:'管网俯视',mode:'network',note:'查看管网平面关系'},{id:'pump',label:'CAD 泵房参考',mode:'pump',note:'六泵与集管剖开检查 · 隐藏外墙和楼梯'},{id:'hydraulic',label:'泵组与管网',mode:'hydraulic',note:'六泵与下沉接入 · 竖向按 CAD，平面配准待核'},{id:'main',label:'主干管段',mode:'network',note:'定位模型中最长的供水管段'},{id:'meter',label:'BJ9 水表',mode:'network',note:'定位 CAD 水表及宿主管段'},{id:'crossing',label:'交叉下穿',mode:'network',note:'查看非连通交叉的示意下穿'},{id:'station',label:'站房外观',mode:'detail',note:'站房精细模型与周边关系'}];
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presets.splice(4,0,{id:'singlePump',label:'主泵近景',mode:'hydraulic',note:'PU_VFD_1 · 设备法兰与进出水连接'});
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if(model.cadAttachments?.length)presets.push({id:'riser',label:'站台上层立管',mode:'network',context:false,note:'CAD DN150 · 高差 10.85 m · 上层配水未推断'});
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let request=0,flight=null,active=null;const key='zjb-camera-bookmarks-v24';let saved=[];
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try{const v=JSON.parse(localStorage.getItem(key)||'[]');if(Array.isArray(v))saved=v.filter(p=>p&&typeof p.id==='string'&&typeof p.label==='string'&&p.label.length<=24&&['network','hydraulic','pump','detail','map','meters'].includes(p.mode)&&[p.position,p.target].every(a=>Array.isArray(a)&&a.length===3&&a.every(Number.isFinite))).slice(0,8);}catch{}
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function emit(note){onChange({active,views:[...presets,...saved],note});}
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function stop(){request++;flight=null;active=null;emit('自由浏览 · 可保存当前视角');}
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controls.addEventListener('start',stop);
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function bounds(p){let box=new THREE.Box3();
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if(p.id==='overview'||p.id==='plan')box.setFromObject(networkRoot);
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else if(p.id==='pump'||p.id==='station'){for(const o of root.children)if(o.visible&&(p.id!=='pump'||/physical_|piping_reference/.test(o.userData.resourceId)))box.union(new THREE.Box3().setFromObject(o));if(p.id==='station'){const facade=root.children.find(o=>o.userData.resourceId==='detail_facade');if(facade)box.setFromObject(facade);}}
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else if(p.id==='hydraulic'){for(const l of model.links.filter(l=>l.kind==='PUMPS'))for(const a of l.coordinates)box.expandByPoint(new THREE.Vector3(a[0]-513800,model.verticalCoordination?.pump.pipeCenterY??.35,-(a[1]-2344450)));networkRoot.traverse(o=>{if(o.userData.kind==='PUMPS'&&!o.isMesh)box.union(new THREE.Box3().setFromObject(o));});box.expandByScalar(2);}
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else if(p.id==='riser'){networkRoot.traverse(o=>{if(o.userData.assetId===model.cadAttachments[0].assetId)box.union(new THREE.Box3().setFromObject(o));});box.expandByScalar(2);}
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else if(p.id==='singlePump'){networkRoot.traverse(o=>{if(o.userData.assetId==='inp:link:PU_VFD_1'&&!o.isMesh)box.union(new THREE.Box3().setFromObject(o));});box.expandByScalar(.75);}
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else if(p.id==='meter'){networkRoot.traverse(o=>{if(o.userData.assetId==='zjb:meter:BJ9')box.union(new THREE.Box3().setFromObject(o));});box.expandByScalar(3);}
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else if(p.id==='main'){const distance=l=>l.coordinates.slice(1).reduce((s,p,i)=>s+Math.hypot(p[0]-l.coordinates[i][0],p[1]-l.coordinates[i][1]),0),l=model.links.filter(l=>l.kind==='PIPES').sort((a,b)=>distance(b)-distance(a))[0];for(const p of l.coordinates)box.expandByPoint(new THREE.Vector3(p[0]-513800,.35,-(p[1]-2344450)));box.expandByScalar(5);}
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else if(p.id==='crossing'){const a=model.layouts[8].pipes;let i=0;for(let j=0;j<a.length;j+=16)if(a[j+13]<a[i+13])i=j;const point=new THREE.Vector3(a[i+12],a[i+13],a[i+14]);box.setFromCenterAndSize(point,new THREE.Vector3(22,10,22));}
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return box;
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}
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async function visit(id){const p=[...presets,...saved].find(p=>p.id===id);if(!p)return;const token=++request;flight=null;emit('正在准备 '+p.label+'…');
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try{await show(p.mode,{frame:false});if(token!==request)return;setDisplayMode(p.displayMode??(p.mode==='hydraulic'?'coordinated':'global'));root.visible=p.context??(p.mode!=='hydraulic'&&p.id!=='crossing');
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for(const o of root.children)if(/roof|ceiling/.test(o.userData.resourceId))o.visible=p.roof??true;
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if(p.id==='pump')for(const o of root.children)if(['detail_pump_walls','detail_pump_access'].includes(o.userData.resourceId))o.visible=false;
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if(p.layers)for(const o of root.children)if(typeof p.layers[o.userData.resourceId]==='boolean')o.visible=p.layers[o.userData.resourceId];
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let pose,box;if(p.position){pose=p;box=new THREE.Box3().setFromCenterAndSize(new THREE.Vector3(...p.target),new THREE.Vector3(20,20,20));}else{box=bounds(p);pose=framePose(box,camera.aspect,{direction:p.id==='plan'?[0,1,.0001]:p.id==='crossing'?[1,.8,1]:p.id==='pump'?[.5,.9,1]:[.6,.8,1]});}
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appearance.frame(box,p.mode);camera.near=Math.max(.05,new THREE.Vector3(...pose.position).distanceTo(new THREE.Vector3(...pose.target))/2000);camera.far=20000;camera.updateProjectionMatrix();active=id;
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flight={start:performance.now(),from:camera.position.clone(),targetFrom:controls.target.clone(),to:new THREE.Vector3(...pose.position),targetTo:new THREE.Vector3(...pose.target)};
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if(matchMedia('(prefers-reduced-motion: reduce)').matches){camera.position.copy(flight.to);controls.target.copy(flight.targetTo);flight=null;controls.update();}
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emit(p.note??'已保存的相机位置');
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}catch(e){if(token===request)emit('视角加载失败：'+e.message);}
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}
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function tick(now){if(!flight)return;const t=Math.min(1,(now-flight.start)/500),v=t*t*(3-2*t);camera.position.lerpVectors(flight.from,flight.to,v);controls.target.lerpVectors(flight.targetFrom,flight.targetTo,v);if(t===1)flight=null;}
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function save(label){label=label.trim();if(!label||label.length>24)throw Error('请输入 1–24 字的视角名称。');if(saved.length>=8)throw Error('最多保存 8 个视角，请先移除不用的视角。');const p={id:'saved-'+Date.now(),label,mode:getMode(),displayMode:getDisplayMode(),position:camera.position.toArray(),target:controls.target.toArray(),context:root.visible,roof:root.children.filter(o=>/roof|ceiling/.test(o.userData.resourceId)).every(o=>o.visible)};p.layers=Object.fromEntries(root.children.map(o=>[o.userData.resourceId,o.visible]));const next=[...saved,p];localStorage.setItem(key,JSON.stringify(next));saved=next;active=p.id;emit('视角已保存在本机浏览器');}
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function remove(id){saved=saved.filter(p=>p.id!==id);localStorage.setItem(key,JSON.stringify(saved));if(active===id)active=null;emit('已移除保存的视角');}
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emit('选择一个观察位置');return {visit,tick,save,remove,stop,presets};
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}
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