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@ -3,7 +3,8 @@ import type { ItemTypeDefineOption } from '@/model/itemType/ItemTypeDefine.ts' |
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import type { ItemJson } from '@/model/WorldModelType.ts' |
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import { getAllItemTypes, getItemTypeByName } from '@/runtime/DefineItemType.ts' |
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import type Viewport from '@/designer/Viewport.ts' |
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import type Toolbox from '@/model/itemType/Toolbox.ts' |
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import { computeBoundsTree, disposeBoundsTree } from 'three-mesh-bvh' |
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import { Vector2 } from 'three/src/math/Vector2' |
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export function quickCopyByMouse() { |
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// 获取鼠标位置，查看鼠标是否在某个 viewport 的画布上，并取得该 viewport
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@ -13,13 +14,20 @@ export function quickCopyByMouse() { |
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return |
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} |
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// 从当前 mouse.x, mouse.z 获取地图坐标
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const viewport: Viewport = currentMouseInfo.viewport |
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const x = currentMouseInfo.x |
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const z = currentMouseInfo.z |
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const point: THREE.Vector2 = currentMouseInfo.mouse |
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// 如果当前 x,y 命中在某条线上，以当前鼠标为点，插入一个这个线段的起点的相似点，连接两头的点。
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const ray = new THREE.Raycaster() |
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ray.setFromCamera(point, viewport.camera) |
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const intersections = ray.intersectObjects(viewport.dragControl._dragObjects, true) |
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if (intersections.length === 0) { |
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system.msg('没有找到可复制的对象') |
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return |
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} |
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console.log('intersections:', intersections) |
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/* |
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// 如果不在线上，查找0.2米内的有效点 Object3D, 如果有，则以这个点为起点, 延伸同类型的点，并让他们相连
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findObject3DByCondition(viewport.scene, object => { |
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// 判断 object 是否是有效的 Object3D, 并且是当前 viewport 的对象
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@ -39,6 +47,68 @@ export function quickCopyByMouse() { |
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} |
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return false |
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}) |
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*/ |
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} |
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/** |
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* 查找射线周围指定半径内的对象 |
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*/ |
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export function findObjectsInRadius(viewport: Viewport, |
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point: THREE.Vector2, |
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radius: number, |
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lines: { object: THREE.Object3D, distance: number }[], |
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points: { object: THREE.Object3D, distance: number }[] |
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): void { |
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const ray = new THREE.Raycaster() |
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ray.setFromCamera(point, viewport.camera) |
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viewport.dragControl._dragObjects.forEach(obj => { |
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if (obj instanceof THREE.Points) { |
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// 处理点云：遍历每个点
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const distance = distanceToRay(ray, point) |
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if (distance <= radius) { |
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points.push({ object: obj, distance }) |
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} |
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} else if (obj instanceof THREE.Line) { |
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// 处理线段：计算线段到射线的最近距离
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const distance = getLineDistanceToRay(ray, obj) |
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if (distance <= radius) { |
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lines.push({ object: obj, distance }) |
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} |
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} |
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}) |
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} |
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/** |
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* 计算点到射线的最短距离 |
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*/ |
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function distanceToRay(ray: THREE.Raycaster, point: THREE.Vector2) { |
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const closestPoint = new THREE.Vector3() |
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ray.closestPointToPoint(point, closestPoint) |
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return point.distanceTo(closestPoint) |
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} |
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/** |
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* 计算线段到射线的最短距离 |
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*/ |
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function getLineDistanceToRay(ray: THREE.Raycaster, line: THREE.Line) { |
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const lineStart = new THREE.Vector3() |
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const lineEnd = new THREE.Vector3() |
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line.geometry.attributes.position.getXYZ(0, lineStart) |
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line.geometry.attributes.position.getXYZ(1, lineEnd) |
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line.localToWorld(lineStart) |
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line.localToWorld(lineEnd) |
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const lineSegment = new THREE.Line3(lineStart, lineEnd) |
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const closestOnRay = new THREE.Vector3() |
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const closestOnLine = new THREE.Vector3() |
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THREE.Line3.prototype.closestPointsRayLine ??= function(ray, line, closestOnRay, closestOnLine) { |
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// 实现射线与线段最近点计算（需自定义或使用数学库）
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} |
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lineSegment.closestPointsRayLine(ray, true, closestOnRay, closestOnLine) |
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return closestOnRay.distanceTo(closestOnLine) |
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} |
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/** |
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