公开(公告)号：BR9100885A

公开(公告)日：1991-11-05

申请号：BR9100885

申请日：1991-03-05

Applicant: IBM

Inventor： ALSTAN JOHN K ,  HICKE JEFFREY A ,  LASCELLES MARTIN C ,  SHERMAN STEPHEN P ,  WONG MICHAEL

IPC: G06F3/153 ,  G06F17/50 ,  G06T3/00 ,  G06T17/00 ,  G06T17/40 ,  G06F15/60

Abstract: The invention relates to the correlation of two-dimensional displayed points of an axonometric projection with corresponding three-dimensional points of the projected shapes. A point on a display screen surface is selected and the screen coordinates of the points of the three-dimensional shape are found by converting successive points of the shape to two-dimensional screen equivalents. Comparing the converted coordinates to those of the selected point identifies the shape point corresponding to the selected shape.