计算机辅助设计与图形学学报
計算機輔助設計與圖形學學報
계산궤보조설계여도형학학보
JOURNAL OF COMPUTER-AIDED DESIGN & COMPUTER GRAPHICS
2015年
6期
974-983
,共10页
分层模型%轮廓编辑%三维打印%特征保留%特征链图
分層模型%輪廓編輯%三維打印%特徵保留%特徵鏈圖
분층모형%륜곽편집%삼유타인%특정보류%특정련도
layered model%contour editing%3D printing%feature-preserve%feature linked graph
当用户评估完三维打印模型而需要修改时,目前的编辑技术需要返回原始三维模型进行修改再重新分层,效率低、易出错且编辑不直观。为此,提出面向三维打印的模型编辑方法,即用户直接编辑分层模型的轮廓线,可见即可得,其核心是特征保持的轮廓线编辑技术。首先,将每一条轮廓线分割为特征点和特征段;每个特征点具有特征保持和位移传播的功能,特征保持允许用户自由选择是否保留特征点的角度值,而位移传播则确定了编辑操作的影响范围;两者共同定义了特征点和特征段的编辑模式。然后,根据轮廓线的所有特征及其邻接关系构建一个闭合的特征链图,并结合拉普拉斯坐标的保特征性质让编辑操作在相同层和不同层内的轮廓线上传播。实验结果表明,该方法能够有效地提高面向三维打印的模型编辑效率。
噹用戶評估完三維打印模型而需要脩改時,目前的編輯技術需要返迴原始三維模型進行脩改再重新分層,效率低、易齣錯且編輯不直觀。為此,提齣麵嚮三維打印的模型編輯方法,即用戶直接編輯分層模型的輪廓線,可見即可得,其覈心是特徵保持的輪廓線編輯技術。首先,將每一條輪廓線分割為特徵點和特徵段;每箇特徵點具有特徵保持和位移傳播的功能,特徵保持允許用戶自由選擇是否保留特徵點的角度值,而位移傳播則確定瞭編輯操作的影響範圍;兩者共同定義瞭特徵點和特徵段的編輯模式。然後,根據輪廓線的所有特徵及其鄰接關繫構建一箇閉閤的特徵鏈圖,併結閤拉普拉斯坐標的保特徵性質讓編輯操作在相同層和不同層內的輪廓線上傳播。實驗結果錶明,該方法能夠有效地提高麵嚮三維打印的模型編輯效率。
당용호평고완삼유타인모형이수요수개시,목전적편집기술수요반회원시삼유모형진행수개재중신분층,효솔저、역출착차편집불직관。위차,제출면향삼유타인적모형편집방법,즉용호직접편집분층모형적륜곽선,가견즉가득,기핵심시특정보지적륜곽선편집기술。수선,장매일조륜곽선분할위특정점화특정단;매개특정점구유특정보지화위이전파적공능,특정보지윤허용호자유선택시부보류특정점적각도치,이위이전파칙학정료편집조작적영향범위;량자공동정의료특정점화특정단적편집모식。연후,근거륜곽선적소유특정급기린접관계구건일개폐합적특정련도,병결합랍보랍사좌표적보특정성질양편집조작재상동층화불동층내적륜곽선상전파。실험결과표명,해방법능구유효지제고면향삼유타인적모형편집효솔。
When a design should be modified after its printed model was evaluated, the current methods needed to edit the original 3D model and to slice again. Thus, this paper proposes a 3D printing oriented ed-iting method, i.e. users directly edit the contours of a layered model, and what you get is what you see. The key idea is a feature-preserved contour editing technique. First of all, feature points and feature curves are detected from each contour; a feature point has abilities of feature-preserve and displacement-transfer; the former allows users to decide whether to keep its angle or not; the latter defines its affecting range; together, they define the editing modes of feature points and feature curves. Then, all features and their neighboring relations in a contour form a closed loop, called feature linked graph. With this graph and Laplacian coordi-nates, an editing operation in one layer can be propagated in the same and neighboring layers. Some ex-periments show that this editing method can improve the editing efficiency for 3D printing models.