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    APPARATUS AND METHOD FOR RELATING A POINT OF SELECTION TO AN OBJECT IN A GRAPHICS DISPLAY SYSTEM
    3.
    发明专利
    APPARATUS AND METHOD FOR RELATING A POINT OF SELECTION TO AN OBJECT IN A GRAPHICS DISPLAY SYSTEM 未知

    公开(公告)号：CA2051176A1

    公开(公告)日：1992-04-13

    申请号：CA2051176

    申请日：1991-09-11

    Applicant: IBM

    Inventor： BRASE DEBORAH D ,  LARKY STEVEN P ,  ST CLAIR JOE C ,  SIDOLI PAOLO

    IPC: G06F3/153 ,  G06F3/033 ,  G06F3/048 ,  G06T1/60 ,  G06T11/80 ,  G06T15/30 ,  G09G5/36 ,  G06T15/00 ,  G06T15/20

    Abstract: AT9-90-002 APPARATUS AND METHOD FOR RELATING A POINT OF SELECTION TO AN OBJECT IN A GRAPHICS DISPLAY SYSTEM Apparatus and methods for picking three dimensional objects from images depicted on a video display. The displayed objects are selectively rerendered. During such rerendering the object pixels are compared in depth to the data in a Z buffer for determining visibility. The number and size of the objects subject to rerendering by the rasterization processor is constrained by using the front end graphics processor to define object extents and by rerendering only extents which have been clipped to the boundaries of the pick window. The rerendering operation does not alter the three dimensional graphics image stored in and repetitively scanned from the frame buffer. Selection between multiple objects within the pick window can include a weighted comparison using a pick plane memory to store visibility data by object.

    HIGH PERFORMANCE RASTERIZATION ENGINE
    4.
    发明专利
    HIGH PERFORMANCE RASTERIZATION ENGINE 未知

    公开(公告)号：CA2055785A1

    公开(公告)日：1992-05-16

    申请号：CA2055785

    申请日：1991-10-22

    Applicant: IBM

    Inventor： JOHNSON LEE E JR ,  KOKOSZKA DARYL J ,  LARKY STEVEN P ,  SIDOLI PAOLO

    IPC: G06F3/153 ,  G06T11/20 ,  G06T15/83 ,  G06T15/87

    Abstract: AT9-89-107 A graphics processor including an interface for providing triangle primitives and line primitives representing a graphical image, a line drawer for receiving line primitives and for rendering the line primitives, and a triangle interpolator for receiving the triangle primitives from the interface and for providing line primitives therefrom to the line drawer, wherein the interface includes a register for storing graphics image line primitives and for selectively providing the stored line primitives to the line drawer.

    HIGH PERFORMANCE TRIANGLE INTERPOLATOR
    5.
    发明专利
    HIGH PERFORMANCE TRIANGLE INTERPOLATOR 未知

    公开(公告)号：CA2053947A1

    公开(公告)日：1992-05-16

    申请号：CA2053947

    申请日：1991-10-22

    Applicant: IBM

    Inventor： JOHNSON LEE E JR ,  KOKOSZKA DARYL J ,  LARKY STEVEN P ,  SIDOLI PAOLO

    IPC: G06F3/153 ,  G06T11/20 ,  G06T15/00 ,  G06T15/80 ,  G06F15/66

    Abstract: r9-90-022 A graphics processor including an interface for providing triangle primitives representing a graphics image, a triangle interpolator coupled to the interface for interpolating a triangle primitive and serially computing multiple line primitives from the triangle primitive, a line renderer coupled to the triangle interpolator for receiving a line primitive from the triangle interpolator and for providing pixels representing the line primitive while the triangle interpolator is computing another line primitive.

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