A method and system for creating a three-dimensional earth based on multi-texture

Abstract

The embodiment of the present invention discloses a method and system for creating a three-dimensional earth based on multi-texture. The method includes the following steps: obtaining the vertex texture coordinates of the vertices of the triangular mesh, and calculating the latitude and longitude of the vertices of the triangular mesh corresponding to the vertices of the triangular mesh ; Calculate the first texture coordinate and the second texture coordinate of the triangle mesh vertex according to the longitude and latitude of the triangle mesh vertex; obtain the first sampling result according to the first texture coordinate, and obtain the second texture coordinate according to the second texture coordinate Two sampling results; transparently mixing the first sampling result and the second sampling result to generate a new three-dimensional earth texture. In the embodiment of the present invention, multiple textures are sampled through the latitude-longitude correspondence of multiple textures, and the sampling results are mixed to generate a new texture and refresh the three-dimensional earth texture, so that in areas without satellite images, the ground surface The color is interpolated to improve the display effect of the 3D earth.

Description

technical field [0001] The invention relates to the field of virtual three-dimensional earth, in particular to a method and system for creating a three-dimensional earth based on multi-texture. Background technique [0002] The most important part of the virtual three-dimensional earth system is the virtual three-dimensional earth itself. The virtual three-dimensional earth needs to express the height, color and satellite image of the earth's surface. Effects matter. When using the GPU to process images, the RGBA color mode is also used. RGBA is a color space representing Red (red), Green (green), Blue (blue) and Alpha. Although it is sometimes described as a color space, it is really just the RGB model with additional information added. The color used is RGB, which can belong to any RGB color space, but Catmull and Smith proposed this indispensable alpha value between 1971 and 1972, making alpha rendering and alpha compositing possible. [0003] The data source used for ...

AI Technical Summary

Problems solved by technology

Although it is sometimes described as a color space, it is actually just the RGB model with additional information

The color used is RGB, which can belong to any RGB color space, but Catmull and Smith proposed this indispensable alpha value between 1971 and 1972, making alpha rendering and alpha synthesis possible

Images