Invention Grant
US5877768A Method and system using a sorting table to order 2D shapes and 2D
projections of 3D shapes for rendering a composite drawing
失效
方法和系统使用排序表来排列3D形状的2D形状和2D投影,用于渲染复合图形
- Patent Title: Method and system using a sorting table to order 2D shapes and 2D projections of 3D shapes for rendering a composite drawing
- Patent Title (中): 方法和系统使用排序表来排列3D形状的2D形状和2D投影,用于渲染复合图形
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Application No.: US665940Application Date: 1996-06-19
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Publication No.: US5877768APublication Date: 1999-03-02
- Inventor: Rajiv Jain
- Applicant: Rajiv Jain
- Applicant Address: CA Cupertino
- Assignee: Object Technology Licensing Corp.
- Current Assignee: Object Technology Licensing Corp.
- Current Assignee Address: CA Cupertino
- Main IPC: G06T15/20
- IPC: G06T15/20 ; G06T15/40 ; G06T19/20 ; G06F15/00
Abstract:
A method for rendering two-dimensional shapes and two-dimensional projections of three-dimensional shapes on a projection plane uses a sorting table to determine which shapes overlap other shapes. For each two-dimensional shape, the shorting table includes an order attribute specifying the front to back ordering of the two-dimensional shapes on the projection plane. For each three-dimensional shape the sorting table includes a Z-value specifying a position along a coordinate perpendicular to the projection plane. The position specified is dependent on whether the three-dimensional shape is perceived to be in front of the projection plane or behind the projection plane. The values in the sorting table are sorted to produce a composite ordering of the shapes and a drawing is created by sequentially rendering each shape in the composite order of the sorting table to depict an overlapped appearance of the shapes.
Public/Granted literature
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