公开(公告)号：US5982385A

公开(公告)日：1999-11-09

申请号：US903607

申请日：1997-07-31

Applicant: Keith Fish ,  David Luttropp

Inventor： Keith Fish ,  David Luttropp

IPC: G06T15/00 ,  G06T17/20 ,  G06F15/00

CPC classification number: G06T17/20

Abstract: A geometrical object representation system efficiently represents primitives for a computer graphics system in order to generate a display of a desired geometrical object surface. A data list repository is configured to maintain a linked list of strip primitives received from an application program. A strip builder traverses the linked list searching for matching vertices of unmatched strips. The strip builder uses a logic manipulation to quickly exclude obvious non-matches. After finding two strips with matching vertices, strip builder joins the two strips together. This joining process creates larger strips which represent the geometrical object in a more compact and efficient form. A graphics system can use this more efficient form of data to reduce data calls and decrease run time in processing the data for rendering by a display.

Abstract translation: 几何对象表示系统有效地表示计算机图形系统的基元，以便产生期望的几何物体表面的显示。 数据列表存储库被配置为维护从应用程序接收的条带图元的链接列表。 条形图构建器遍历链接列表，搜索不匹配条带的匹配顶点。 条形构建器使用逻辑操作来快速排除明显的不匹配。 在找到具有匹配顶点的两个条带之后，条带构建器将两个条带连接在一起。 该连接过程产生更大的条，其以更紧凑和有效的形式表示几何对象。 图形系统可以使用这种更有效的数据形式来减少数据调用，并减少处理数据以供显示器渲染的运行时间。

公开(公告)号：US4334803A

公开(公告)日：1982-06-15

申请号：US96837

申请日：1979-11-23

Applicant: Patrick C. Westlake ,  Keith Fish ,  James D. Mallory

Inventor： Patrick C. Westlake ,  Keith Fish ,  James D. Mallory

IPC: E21D21/00 ,  E21D20/00

CPC classification number: E21D21/0086 ,  E21D21/0026

Abstract: A mine roof bolt of the type used in supporting the ceiling or roofs of underground mine passages is disclosed. The mine bolt includes an elongated shaft, threaded on one end with a stop member in the form of a hemispherical head provided at the other end. A bolt head is force fitted onto the shaft into abutment with the outer stop member. Similarly, a washer is also force fitted onto the shaft and into abutment with the bolt head. An inner stop in the form of an annular bead is formed on the shaft adjacent the underside of the washer.

Abstract translation: 公开了一种用于支撑地下矿井通道天花板或屋顶的矿用屋顶螺栓。 矿用螺栓包括细长轴，其一端螺纹连接，并具有设置在另一端的半球形头部形式的止动构件。 螺栓头被强制装配到轴上以与外部止动构件邻接。 类似地，也将垫圈强制安装在轴上并与螺栓头邻接。 在邻近洗衣机下侧的轴上形成呈环形胎圈形式的内部止动件。