The key geometry information such as normal vector and main curvature etc . were firstly calculated by local approximation of measurement points with paramet 最后,總結(jié)本論文研究工作的主要結(jié)論,并對后續(xù)研究工作作了展望。
Besides geometry information design solution includes product functional requirements, engineering constraints, design experiences and rules and so on 除了幾何信息以外,設(shè)計結(jié)果還包括產(chǎn)品功能需求、工程約束、設(shè)計經(jīng)驗(yàn)和規(guī)則等。
This idea of initial stage of design is often shown as a kind of inspiration flashing immediately, lack accurate size information and geometry information 這一設(shè)計初期階段的想法常表現(xiàn)為一種即時閃現(xiàn)的靈感,缺少精確尺寸信息和幾何信息。
The following several key technologies are studied in detail : ? utilizing xml to store the different feature and geometry information the part of different cad systems 具體內(nèi)容如下:1)利用xml儲存來自不同cad系統(tǒng)的零件特征信息和幾何信息。
This idea of initial stage of design is often shown as a kind of inspiration flashing immediately, which is lack of accurate size information and geometry information 這一設(shè)計初期階段的想法常表現(xiàn)為一種即時閃現(xiàn)的靈感,缺少精確尺寸信息和幾何信息。
?through the redevelopment of cad system, the xml file including the part's feature information, and the vrml file including geometry information are retrieved 2)對cad系統(tǒng)進(jìn)行二次開發(fā),獲得包含零件幾何信息和特征信息的xml文檔、包含圖形信息的vrml文件,并建立兩者之間映射關(guān)系。
Step, which contains a large amount of data, and vrml, which lacks description of the part's geometry information and feature information, can not act as the carrier to describe the part's information under the web environment step數(shù)據(jù)信息量大,vrml缺少零件幾何信息和特征信息的精確描述,都無法作為web環(huán)境下零件信息描述的載體。
Feature mode1ing system can provide not only the geometry information of parts, but also process information of the parts, which latter procedure cam system needs, to real ize share and exchange for information between each cax systems 特征建模系統(tǒng)能提供后續(xù)cam系統(tǒng)所需的零件幾何信息和工藝信息,實(shí)現(xiàn)各個cax系統(tǒng)之間的信息共享與交換。
Most traditional cad systems need users to provide precise information . however, the idea in conceptual design is sketchy and short of detailed geometry information . designers are bounded in the wimp interactive mode 傳統(tǒng)cad系統(tǒng)一方面在建模上依賴于精確的信息,不適合概念設(shè)計階段粗略設(shè)計想法的表達(dá),這一階段的想法常表現(xiàn)為一種即時閃現(xiàn)的靈感,缺少精確尺寸信息和幾何信息。
Chapter 2 presents a deformation-and-reconstruction-oriented virtual design model, which includes the representation of part attributes, surface character relationships . a milti-hierarchical pan model is used to describe the part character and geometry information 第二章給出了面向曲面變形與重建的曲面零件層次網(wǎng)格模型,基于分層次的零件信息模型來表達(dá)網(wǎng)格面的特征屬性及幾何屬性。