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Drawing method based on shared data of spatial triangular meshes and spatial quadrilaterals

A technology of triangular mesh and drawing method, applied in image data processing, 3D modeling, instruments, etc., to achieve the effect of reducing memory usage and reducing the process of creating quadrilateral mesh data

Inactive Publication Date: 2015-12-16
KARAMAY HONGYOU SOFTWARE
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Problems solved by technology

[0003] The object of the present invention is to provide a kind of drawing method based on shared data of spatial triangular mesh and spatial quadrilateral, thereby solving the aforementioned problems existing in the prior art

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  • Drawing method based on shared data of spatial triangular meshes and spatial quadrilaterals
  • Drawing method based on shared data of spatial triangular meshes and spatial quadrilaterals
  • Drawing method based on shared data of spatial triangular meshes and spatial quadrilaterals

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[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention.

[0027] The application's shared data drawing method based on the spatial triangular grid and the spatial quadrilateral, the method is realized according to the following steps:

[0028] S1, construct terrain triangular mesh vertex data in three-dimensional space,

[0029] S2, set the vertex number of a quadrilateral composed of two adjacent triangular meshes that coincide with one edge in the terrain, and combine three consecutive vertex numbers of the four vertex numbers of the same quadrilateral in a clockwise or counterclockwise direction to form Two triangular meshes, and the number of the fi...

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Abstract

The invention discloses a drawing method based on shared data of spatial triangular meshes and spatial quadrilaterals, and relates to the field of establishment of three-dimensional space models. The method comprises: establishing terrain triangular mesh vertex data in a three-dimensional space; setting vertex numbers of a quadrilateral formed by two adjacent triangular meshes that coincide at one edge in a terrain; establishing a correspondence between the vertex numbers and the terrain triangular mesh vertex data; drawing line segments by using a linear function of a three-dimensional engine to obtain the quadrilateral in the terrain; and closing open quadrilaterals at edges of the terrain, to complete drawing of the spatial quadrilaterals. The method according to the invention realizes drawing a terrain spatial quadrilateral mesh without generating new memory data, reduces the process of creating quadrilateral mesh data, and decreases memory usage.

Description

technical field [0001] The invention relates to the field of three-dimensional space model modeling, in particular to a drawing method based on shared data between a space triangular grid and a space quadrilateral. Background technique [0002] In the field of 3D modeling, it is often necessary to perform spatial modeling of terrain or other surfaces, and at the same time display the terrain grid. In 3D space, the surface is composed of triangular meshes, so the terrain mesh is composed of a series of triangular meshes. of. However, in some requirements, the terrain grid is required to be displayed in the form of a quadrilateral grid. When drawing a spatial surface, triangular grid data must be created. The quadrilateral grid is only created when there is a need. If there are millions of terrain grids, the quadrilateral grid data created will be very large, so when creating a quadrilateral terrain grid, technicians will face quadrilateral The grid data is huge, and the ope...

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Application Information

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IPC IPC(8): G06T17/00G06T17/20
Inventor 李生龙
Owner KARAMAY HONGYOU SOFTWARE
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