Method, device and device for visual rendering of large-scale river flow field based on webgl

Abstract

The invention relates to a method for visual rendering of a large-scale river channel flow field based on WebGL. The distribution of the internal flow field; using the river boundary data information, the inverse proportional weight function is introduced to construct the flow function ψ, and the flow field information U(P i ); based on the triangulated channel, combined with the flow field information U(P i ) to obtain the entire river flow field map; based on the river flow field map, the water flow is rendered and drawn by using the texture image flow field visualization method in WebGL to obtain the actual river channel rendering scene map. The water body rendering method of the present invention is a rendering visualization method that can adapt to various large-scale river channel shapes and correctly express the river channel flow state. The invention also relates to an apparatus, medium and equipment for visual rendering of large-scale river flow field based on WebGL.

Description

technical field [0001] The present invention relates to the field of computer technology, and in particular, to a method, device, medium and device for visual rendering of a large-scale river channel flow field based on WebGL. Background technique [0002] With the rapid development of WebGL, 3D virtual simulation applications such as data earth, digital park, and digital watershed based on WebGL are in a blowout state. Water rendering is an important part of 3D simulation applications, and different forms of water rendering technology are different. The traditional water surface rendering technology can achieve the effect of water surface flow, mostly using the linear waveform superposition method, but it has the problem of a single flow direction, all the water surface only flows in one direction, for the drawing of curved river channels, the river flow state cannot be well represented, which is inconsistent with the actual situation. The flow shows a contradictory picture...

AI Technical Summary

Problems solved by technology

The traditional water surface rendering technology can achieve the effect of water surface flow, mostly by superimposing linear waveforms, but it has the problem of a single flow direction, all water surfaces only flow in one direction, and for curved river channel rendering, the river flow state cannot be well represented, which is different from the actual Contradictory scenes appear in the flow direction

On the other hand, for the accurate water flow state information calculated based on numerical methods, the calculation load is large, and it is not suitable for large-scale river scenarios, and the flow field is mostly displayed in the form of arrows. For the time-varying flow field display It is acceptable, but it lacks vitality for the dynamic display of the single flow field information of the river, and cannot macroscopically display the movement of microscopic particles

[0003] And, most of the existing technologies use the surface flow field in the form of a single arrow, which cannot dynamically display the actual flow phenomenon of the river channel

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