发明授权
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
- 专利标题: Method and system using a sorting table to order 2D shapes and 2D projections of 3D shapes for rendering a composite drawing
- 专利标题(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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申请号: US665940申请日: 1996-06-19
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公开(公告)号: US5877768A公开(公告)日: 1999-03-02
- 发明人: Rajiv Jain
- 申请人: Rajiv Jain
- 申请人地址: CA Cupertino
- 专利权人: Object Technology Licensing Corp.
- 当前专利权人: Object Technology Licensing Corp.
- 当前专利权人地址: CA Cupertino
- 主分类号: G06T15/20
- IPC分类号: G06T15/20 ; G06T15/40 ; G06T19/20 ; G06F15/00
摘要:
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.
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