公开(公告)号：US5745117A

公开(公告)日：1998-04-28

申请号：US607839

申请日：1996-02-27

申请人： Hiroshie Masuda ,  Masayuki Numao

发明人： Hiroshie Masuda ,  Masayuki Numao

IPC分类号： G06T15/00 ,  G06T17/10 ,  G06T17/20

CPC分类号： G06T17/10

摘要： A solid model is created from a plurality of incomplete drawings. Line segments or curves on each view are calculated from two-dimensional data of a three-view drawing. A wireframe model is created on the basis of the calculated line segments or curves. The wireframe model is corrected by comparing edges of the created wireframe model and the line segments or curves. The corrected wireframe model is converted into a cell-decomposition model. Conditions establishing the line segments or curves as edges of the cell-decomposition model are set by Boolean expressions. A solid model is synthesized on the basis of combinations of cells which are solutions of the expressions. If no solution exists even if the expressions are solved, candidate models are synthesized on the basis of any combination of cells. The synthesized candidate models are displayed in the descending order of the degree of similarity. Alternatively, if a plurality of combinations of cells which are the solutions do exist, a candidate model selected by the operator is determined to be the solid model.

摘要翻译： 从多个不完整的图纸创建实体模型。 每个视图上的线段或曲线由三视图的二维数据计算。 基于计算的线段或曲线创建线框模型。 线框模型通过比较创建的线框模型和线段或曲线的边缘来校正。 校正的线框模型被转换成细胞分解模型。 建立线段或曲线作为细胞分解模型边缘的条件由布尔表达式设置。 基于作为表达式的解的单元的组合来合成实体模型。 如果没有解决方案存在，即使表达式被解决，候选模型是在任何单元格组合的基础上合成的。 合成的候选模型以相似程度的降序显示。 或者，如果存在作为解决方案的单元的多个组合，则由操作者选择的候选模型被确定为实体模型。