drawing entities 中文意思是什麼
drawing entities
解釋
繪圖實體-
In the thesis. reading the iges file - 3 - and all the geometry entities and annotation entities are extracted ; on the base of geometry entities extracted, geometry entities are classified based to their three views. a new data structure is proposed to describle 3d form features ; inspection items of the workpiece are recognized ; the cmm - based inspection planning system is built ; on the other hand, as a part of cims, cmm need exchanging data with the software of cad / cam, so iges export interface is developed based on iges standard. in order to show the whole information of the surface, the 3 - dimensional free - form surface is drawing using the opengl
通過讀取iges文件對實體進行分離、提取、識別出對工件進行描述的原始信息；在此基礎上，西安理工大學碩士學位論文提出一種優化演算法對三視圖自動進行分離，建立了一種對工件進行三維描述的數學模型，照此模型對工件進行立體重構；識別出工件的各種檢測信息，提出一種對公差信息進行描述的數學模型，井與三維立體相結合，生成有檢測意義的三維實體；根據三坐標機的測量系統，生成相應的檢測規劃；另一方面，作為cmis的一部分，應具有與cad cam軟體之間的數據交換功能，本文還開發了iges輸出介面，採用opengl繪制三維空間曲面，向用戶展示其全面信息。 -
Concrete algorithm is firstly recognizing 2d feature obtained from geometric entities, then on the instruction of the shape analysis combining with the projective rulers of mechanical drawing, matching three 2d view features, creating 3d basic model, forming a operation list, finically finished 3d reconstruction
在重建演算法上，利用提取的幾何實體進行二維視圖特徵的識別，在形體分析法的指導下，結合制圖中的投影原則匹配三維基本形體，最後按照基本體素的運算序列經過復雜的布爾運算完成重建。 -
By using it, the section mapping drawings of multi - types & complex pipeline system can be automatically generated through the entity crossing operation. this method composes of the following three key steps. in the first, different graphic entities are identified from the complex pipelines drawing in terms of the layer information they owned, then the correspondent information is to be encapsulated to keep the spatial data completeness of the graphic symbols
該方法通過管線系統設計圖中的圖形實體的分層處理與信息封裝，首先實現了復雜管線實體的自動識別並確保了圖形實體具有對應管線實體對象的完備空間信息；在此基礎上，根據用戶給出的任意位置截切線，構造隱式描述的截切面並與隱式描述的管線實體進行求交運算；最後通過對求交結果的坐標變換，生成能夠直觀反映出多類型復雜管線系統空間分佈信息的截切面映射圖。 -
Space is partitioned by a grid, and computing the list of visible entities consists in taking entities from the same cell and iterating on the neighbour cells by drawing a spiral, until the desired number of visible entities is reached
空間被一個網格所劃分，首先獲取與要計算的實體在同一網格的實體，然後以螺旋狀的方式遍歷周圍的網格，並添加其中的實體，直接找到足夠數量的實體。 -
Considering the shape expression modes are more diversiform, dispersed, and complex in shop drawing, many notations in shop drawing contain shape information, also with distinct characteristics, a new method of extracting engineering quality based on notation entities functional semantics is put forward in chapter 5
建築圖樣形體形狀的表達方式豐富、多樣，建築圖樣的很多標注中蘊涵形體的形狀信息，並且這些標注具有明顯的視圖特點。論文第五章通過分析施工圖中的標注和建築物功能部件的關聯特徵，提出了基於標注實體功能語義的工程量信息獲取方法。
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