公开(公告)号：DE3851207T2

公开(公告)日：1995-03-30

申请号：DE3851207

申请日：1988-10-24

Applicant: IBM

Inventor： CALLAHAN ROBERT MATTHEW ,  HEMPEL BRUCE CARLTON

IPC: G06T11/80 ,  G06F3/033 ,  G06F3/048

Abstract: A method of operating a computer graphics system is described which gives local control to an application's display list program during the drawing process when a "pickable" primitive intersects the pick window. This control is provided in such a way that the state of graphics workstation remains unaltered. Thus the application's local display list program is permitted to make "picking" and/or visualization decisions at the moment the pick occurs, and then resume execution of the display program wherever desired (typically, at the graphic instruction following the one that caused the pick). This capability enables application programs to provide greater functionality, usability and productivity their users.

公开(公告)号：DE3851207D1

公开(公告)日：1994-09-29

申请号：DE3851207

申请日：1988-10-24

Applicant: IBM

Inventor： CALLAHAN ROBERT MATTHEW ,  HEMPEL BRUCE CARLTON

IPC: G06T11/80 ,  G06F3/033 ,  G06F3/048

Abstract: A method of operating a computer graphics system is described which gives local control to an application's display list program during the drawing process when a "pickable" primitive intersects the pick window. This control is provided in such a way that the state of graphics workstation remains unaltered. Thus the application's local display list program is permitted to make "picking" and/or visualization decisions at the moment the pick occurs, and then resume execution of the display program wherever desired (typically, at the graphic instruction following the one that caused the pick). This capability enables application programs to provide greater functionality, usability and productivity their users.