公开(公告)号：JPH02132573A

公开(公告)日：1990-05-22

申请号：JP24449988

申请日：1988-09-30

Applicant: IBM JAPAN

Inventor： KAWABE SHINJI ,  MASUDA HIROSHI ,  SHIMADA KENJI

IPC: G06F17/50 ,  G06T15/00 ,  G06T17/10

Abstract: PURPOSE:To correct at a high speed a set operation which is carried out at an optional time point by adding data on the set operation of a designated type and the form of the input operation to be set and updating a history data file of the set operations. CONSTITUTION:For the boundary of the result of the set operation, the data showing whether each component element stored in a non-diversity boundary expression data file 7 belongs to the partial set to be outputted or not is added for each component element. Thus the component elements can be extracted out of the file 7. The history of the set operation is stored in a set operation history data file 9, and the partial set to be outputted is decided based on the history of the set operation. Then the set operation is corrected by designating a specific primitive and deleting this primitive. Thus the set operation can be corrected at a high speed.