WebGL-based large-scale river channel flow field visualization rendering method, device and equipment

Abstract

The invention relates to a WebGL-based large-scale river channel flow field visualization rendering method. The method comprises the following steps: extracting river channel boundary data information along the flow direction of a river channel; dividing the river channel through a Delaunay triangulation algorithm, constructing a triangulation river channel, and representing the flow field distribution condition in the whole river channel by finite points; introducing an inverse proportion weighting function to construct a flow function psi by using the river boundary data information, and calculating flow field information U(Pi) conforming to actual characteristics through the flow function psi; based on the triangularized river channel and in combination with the flow field information U(Pi), obtaining a flow field graph of the whole river channel; and rendering and drawing the water flow in WebGL by adopting a texture image flow field visualization method based on the river flow field graph to obtain an actual river rendering scene graph. The water body rendering method is a rendering visualization method capable of adapting to various large-scale river channel shapes and correctly representing the river channel flow state. The invention further relates to a device, a medium and equipment for large-scale river channel flow field visualization rendering based on the WebGL.

Description

technical field [0001] The present invention relates to the field of computer technology, in particular to a method, device, medium and equipment for visual rendering of large-scale river flow field based on WebGL. Background technique [0002] With the rapid development of WebGL, 3D virtual simulation applications based on WebGL such as data earth, digital park, and digital watershed are in a blowout state. Water body rendering is an important part of 3D simulation applications, and different forms of water body rendering technologies are different. 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 The flow direction appears contradictory. On the other hand, for the a...

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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