A high-definition cloud rendering method

Abstract

The present invention proposes a high-definition cloud rendering method. Firstly, the real cloud weather data is stored as a three-dimensional texture cloud image; The image is rendered based on global illumination; the viewing angle and the position of the sun in the sky scene are constantly changed to obtain the rendering result of each three-dimensional texture cloud image. The present invention describes the shape of clouds through three-dimensional textures, and uses ray tracing technology for cloud rendering, which can reflect the appearance of global illumination changing with different observation angles and the effect of superimposed shadows of clouds with different thicknesses.

Description

technical field [0001] The invention relates to the technical field of visual imaging of aviation simulators, in particular to a high-definition cloud rendering method. Background technique [0002] The visual imaging system of aviation simulators usually needs to render clouds, because the most common real objects in the actual flight process are clouds of different shapes, and the shape, color, shadow thickness, and gloss of clouds play a role in the pilot's flight decision-making decisive role. Therefore, how to simulate clouds as close as possible to the real situation is an important task of the visual imaging system. [0003] In the current visual imaging system, the commonly used cloud volume rendering method is to use a mixed method of plane texture and volume rendering, and the cloud data is pasted on the sky background in the form of a two-dimensional plane texture to render a large cloud. Figure 1 Generally, it adopts the form of a transparent layer floating in ...

AI Technical Summary

Problems solved by technology

[0004] The traditional rendering scheme cannot correctly realize the occlusion and transparency requirements in the cloud penetration effect. There is no three-dimensional information in the plane map, which cannot reflect the process of the aircraft passing through the cloud. When the aircraft is close to the cloud, the visual reality will be weakened.

[0005] On the other hand, on the basis of using planar textures, even if the volume rendering method is used, the global illumination that changes with different viewing angles will not be realized, and the thickness of the cloud cannot be reflected, and the reality is weak.

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