@vuemap/vue-amap-extra/es/packages/ThreeLayer/CSS2DRenderer.mjs.map

@vuemap/vue-amap扩展库，包含threejs相关图层

{"version":3,"file":"CSS2DRenderer.mjs","sources":["../../../../packages/ThreeLayer/CSS2DRenderer.js"],"sourcesContent":["import { Matrix4, Object3D, Vector2, Vector3 } from 'three';\r\n\r\nclass CSS2DObject extends Object3D {\r\n  constructor(element = document.createElement('div')) {\r\n    super();\r\n\r\n    this.isCSS2DObject = true;\r\n\r\n    this.element = element;\r\n\r\n    this.element.style.position = 'absolute';\r\n    this.element.style.userSelect = 'none';\r\n\r\n    this.element.setAttribute('draggable', false);\r\n\r\n    this.center = new Vector2(0.5, 0.5); // ( 0, 0 ) is the lower left; ( 1, 1 ) is the top right\r\n\r\n    this.addEventListener('removed', function () {\r\n      this.traverse(function (object) {\r\n        if (object.element instanceof Element && object.element.parentNode !== null) {\r\n          object.element.parentNode.removeChild(object.element);\r\n        }\r\n      });\r\n    });\r\n  }\r\n\r\n  copy(source, recursive) {\r\n    super.copy(source, recursive);\r\n\r\n    const self = this;\r\n\r\n    self.element = source.element.cloneNode(true);\r\n\r\n    self.center = source.center;\r\n\r\n    return self;\r\n  }\r\n}\r\n\r\n//\r\n\r\nconst _vector = new Vector3();\r\nconst _viewMatrix = new Matrix4();\r\nconst _viewProjectionMatrix = new Matrix4();\r\nconst _a = new Vector3();\r\nconst _b = new Vector3();\r\n\r\nclass CSS2DRenderer {\r\n  constructor(parameters = {}) {\r\n    const _this = this;\r\n\r\n    let _width, _height;\r\n    let _widthHalf, _heightHalf;\r\n\r\n    const cache = {\r\n      objects: new WeakMap(),\r\n    };\r\n\r\n    const domElement =\r\n      parameters.element !== undefined ? parameters.element : document.createElement('div');\r\n\r\n    domElement.style.overflow = 'hidden';\r\n\r\n    this.domElement = domElement;\r\n\r\n    this.getSize = function () {\r\n      return {\r\n        width: _width,\r\n        height: _height,\r\n      };\r\n    };\r\n\r\n    this.render = function (scene, camera) {\r\n      if (scene.matrixWorldAutoUpdate === true) scene.updateMatrixWorld();\r\n      if (camera.parent === null && camera.matrixWorldAutoUpdate === true)\r\n        camera.updateMatrixWorld();\r\n\r\n      _viewMatrix.copy(camera.matrixWorldInverse);\r\n      _viewProjectionMatrix.multiplyMatrices(camera.projectionMatrix, _viewMatrix);\r\n\r\n      renderObject(scene, scene, camera);\r\n      zOrder(scene);\r\n    };\r\n\r\n    this.setSize = function (width, height) {\r\n      _width = width;\r\n      _height = height;\r\n\r\n      _widthHalf = _width / 2;\r\n      _heightHalf = _height / 2;\r\n\r\n      domElement.style.width = width + 'px';\r\n      domElement.style.height = height + 'px';\r\n    };\r\n\r\n    function renderObject(object, scene, camera) {\r\n      if (object.isCSS2DObject) {\r\n        _vector.setFromMatrixPosition(object.matrixWorld);\r\n        _vector.applyMatrix4(_viewProjectionMatrix);\r\n\r\n        const visible =\r\n          object.visible === true &&\r\n          _vector.z >= -1 &&\r\n          _vector.z <= 1 &&\r\n          object.layers.test(camera.layers) === true;\r\n        object.element.style.display = visible === true ? '' : 'none';\r\n\r\n        if (visible === true) {\r\n          object.onBeforeRender(_this, scene, camera);\r\n\r\n          const element = object.element;\r\n\r\n          element.style.transform =\r\n            'translate(' +\r\n            -100 * object.center.x +\r\n            '%,' +\r\n            -100 * object.center.y +\r\n            '%)' +\r\n            'translate(' +\r\n            (_vector.x * _widthHalf + _widthHalf) +\r\n            'px,' +\r\n            (-_vector.y * _heightHalf + _heightHalf) +\r\n            'px)';\r\n\r\n          if (element.parentNode !== domElement) {\r\n            domElement.appendChild(element);\r\n          }\r\n\r\n          object.onAfterRender(_this, scene, camera);\r\n        }\r\n\r\n        const objectData = {\r\n          distanceToCameraSquared: getDistanceToSquared(camera, object),\r\n        };\r\n\r\n        cache.objects.set(object, objectData);\r\n      }\r\n\r\n      for (let i = 0, l = object.children.length; i < l; i++) {\r\n        renderObject(object.children[i], scene, camera);\r\n      }\r\n    }\r\n\r\n    function getDistanceToSquared(object1, object2) {\r\n      _a.setFromMatrixPosition(object1.matrixWorld);\r\n      _b.setFromMatrixPosition(object2.matrixWorld);\r\n\r\n      return _a.distanceToSquared(_b);\r\n    }\r\n\r\n    function filterAndFlatten(scene) {\r\n      const result = [];\r\n\r\n      scene.traverse(function (object) {\r\n        if (object.isCSS2DObject) result.push(object);\r\n      });\r\n\r\n      return result;\r\n    }\r\n\r\n    function zOrder(scene) {\r\n      const sorted = filterAndFlatten(scene).sort(function (a, b) {\r\n        if (a.renderOrder !== b.renderOrder) {\r\n          return b.renderOrder - a.renderOrder;\r\n        }\r\n\r\n        const distanceA = cache.objects.get(a).distanceToCameraSquared;\r\n        const distanceB = cache.objects.get(b).distanceToCameraSquared;\r\n\r\n        return distanceA - distanceB;\r\n      });\r\n\r\n      const zMax = sorted.length;\r\n\r\n      for (let i = 0, l = sorted.length; i < l; i++) {\r\n        sorted[i].element.style.zIndex = zMax - i;\r\n      }\r\n    }\r\n  }\r\n}\r\n\r\nexport { CSS2DObject, CSS2DRenderer 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