Air-Space-Ground Integrated Situation Expression Engine and Its Viewpoint Control Method with Inertia

Abstract

The invention relates to an air-space-ground integrated situation expression engine and its viewpoint control method with inertia. By setting a reasonable damping coefficient, when the input quantity stops changing, the speed value has not yet become zero, and the corresponding viewpoint transformation will continue. Stop transforming until the speed is zero. This viewpoint control method will give inertia to the target during scene browsing, making the user experience closer to reality and making the interaction more vivid.

Description

technical field [0001] The invention relates to an air-space-ground integrated situation expression engine and an inertial viewpoint control method thereof. Background technique [0002] With the development of technology, human activities are no longer limited to the ground, and space has become another important place for human activities. In order to occupy this important territory of space, more and more satellites are launched into space, making the number of in-orbit and invalid satellites reach tens of thousands, and the space environment deteriorates sharply. In order to ensure space security and maintain space interests, countries have established their own space situational awareness systems. The space situational awareness system is a huge and complex system engineering. The data it acquires includes various multi-source heterogeneous data such as space-based and ground-based. How to effectively use these data to provide information services for strategic and tac...

AI Technical Summary

Problems solved by technology

[0014] Problem 1. Since the space-ground integration engine includes the visual expression of various situational awareness data such as planets, spacecraft, ground terrain, and space environment, it is difficult to meet the requirements if only one viewpoint control method for browsing targets is used in the situational expression engine. For example, when the view point control method of browsing the spacecraft is used to browse the terrain on the ground, there will be a series of problems that affect the user experience, such as the tilt of the horizon and the inability to rotate around the terrain focus point.

This method of viewpoint switching is simple to implement, but it lacks the transition of viewpoint from one position to another, which is relatively dull and not vivid, especially when switching from the entire solar system to a satellite of the earth, this method is relatively abrupt

[0017] Question 4. One of the characteristics of the air-space-ground integrated situational expression engine is the huge span of time and space. In order to achieve fine expression of various spatial targets at such a large scale, it is necessary to overcome the jitter problem caused by excessive rounding errors of floating point numbers. It will cause a series of problems such as certain parts of the object being clipped indefinitely, the triangle mesh is broken, and the texture is disordered.

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