Three-dimensional digital earth construction method for avionics display and control

Abstract

The invention relates to a three-dimensional digital earth construction method for avionics display and control. The method comprises the following steps: reading a topographic file: reading and loading the topographic file, analyzing the topographic file into topographic data, and generating original topographic data into a memory; calculating vertex data: calculating and generating vertex attribute data; transmitting vertex data: calculating the space size and carrying out data transmission interaction; creating a shader: generating source codes of a vertex shader and a fragment shader, and creating a corresponding executable logic unit; and rendering preparation and rendering: transmitting corresponding parameters to the shaders before rendering, transmitting analyzed VBO data to the vertex shader, calling a drawing instruction glDrawElements for rendering, executing the vertex shader and the fragment shader, and outputting a rendering result to a window to display the three-dimensional digital earth. By adopting a data segmentation and multiplexing mode, the vertex data is ensured to be completely written into a VBO, and the condition of failure caused by large video memory allocation can be avoided.

Description

technical field [0001] The invention relates to the technical field of avionics display and control, in particular to a method for constructing a three-dimensional digital globe for avionics display and control. Background technique [0002] The display and control interface is the medium for interaction and information exchange between the system and users, and it realizes the transformation between the internal form of information and the form acceptable to human beings. The avionics display and control system is one of the important parts of the avionics system. The system has five processes. [0003] However, the current mainstream avionics display and control interface design platform (for example: VAPS XT) can only provide the visual development function of the two-dimensional display and control interface, and does not have the function of three-dimensional vision, and two-dimensional can no longer meet the needs of the current battlefield situation. Need; the 3D di...

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Problems solved by technology

[0003] However, the current mainstream avionics display and control interface design platform (for example: VAPS XT) can only provide the visual development function of the two-dimensional display and control interface, and does not have the function of three-dimensional vision, and two-dimensional can no longer meet the needs of the current battlefield situation. Need; the 3D digital earth is based on the traditional geographic information system technology, with the real 3D scene virtual reality, which has the characteristics of intuitive visualization and high efficiency. It is also the most important part of the avionics display and control device. Therefore, how to The construction of a 3D digital earth in the 3D avionics display and control device is an urgent need to be solved at this stage

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