A Rendering Method of Realistic Ice Shape

Abstract

The present invention is applicable to the technical field of wind tunnel test, and provides a realistic ice type rendering method, comprising the steps of: reading ice type data and aircraft data to obtain an initial ice type fragment set and an initial aircraft fragment set; type fragment set and the initial aircraft fragment set to obtain the initial fragment set, and use the initial fragment set to construct the BVH tree; after traversing the BVH tree twice, the reorganized fragment set is obtained, and the data form of the reorganized fragment set is Structural array; build a pixel shader, a camera is set in the pixel shader, the camera is set in the world coordinate system, and the fragment set is located in the world coordinate system; the camera emits the initial ray, and intersects the initial ray and the fragment set, The ice image is obtained by ray tracing in the pixel shader. The realistic ice-shaped rendering method of the present invention has high-quality rendering effect and efficient real-time rendering performance, and can rotate and zoom arbitrarily without the effect of frame drop.

Description

technical field [0001] The invention relates to the technical field of wind tunnel tests, in particular to a method for rendering realistic ice shapes. Background technique [0002] In order to study the icing phenomenon of aircraft, researchers often use numerical simulation methods based on computational fluid dynamics (hereinafter referred to as: CFD) to simulate the icing process and results of aircraft. Ice type data often contain a variety of physical characteristics, including ice thickness, ice body type, etc. These characteristics play an important role in the study of aircraft icing phenomena. Ice shape visualization is an important link in the CFD research process, which requires the system writer to present a high-quality ice shape rendering result. High-quality ice-shape rendering methods will help relevant researchers to study aircraft ice-shape conditions more conveniently and effectively. [0003] There are three main types of common ice bodies for aircraft...

AI Technical Summary

Problems solved by technology

[0010] 1. In the prior art, the ice type rendering mainly uses other methods such as rasterization rendering to obtain ice types with different colors and / or different shades of color to distinguish different ice types. This type of ice type rendering can only meet the requirements of conventional CFD simulation. However, with the further refinement and increase of aircraft CFD simulation data exploration, it cannot meet the higher requirements of CFD simulation for rendering efficiency and rendering realism in the ice rendering process. Therefore, ice modeling The effectiveness and details of rendered image information are of great significance to follow-up research such as CFD simulation;

[0011] 2. The data of the ice type and aircraft shell is relatively large. The rendering speed and data maintenance of the ray tracing process have an important impact on the simulation results. At the same time, the existing ray tracing process is relatively complicated, which increases the amount of data in the calculation process. It is urgent to solve the problem of ray tracing. Practical issues such as rendering speed and data maintenance speed during tracking;

[0012] 3. At present, the BVH tree data cannot realize the pointer function in the pixel shader, nor can it realize the regular loop function of changing the loop variable in the loop, so that the BVH tree data cannot be imported into the pixel shader. In the pixel shader under the rasterization rendering pipeline Ray tracing operation using BVH data structure

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