Crown fire spread three-dimensional visualization method

Abstract

The invention relates to a crown fire spread three-dimensional visualization method. The crown fire spread three-dimensional visualization method comprises estimating the fireline intensity, the flame length and the spread speed of a crown fire through an FARSITE forest fire spread simulation engine; establishing a fire and smoke particle system through a particle system; establishing a tree three-dimensional model and planting the tree model on a three-dimensional terrain landscape to form a virtual forest environment; customizing vertex shaders and fragment shaders of apparatuses of the model through a programmable pipeline and adopting a texture and color mixture method and an Alpha transparent texture method; setting a simulated starting and ending time, time step and space resolution and estimating a crown fire behavior and a fire field boundary so as to dynamically simulate the dynamic change process of the crown fire in the horizontal direction and the vertical direction. According to the crown fire spread three-dimensional visualization method, the spread process of the crown fire is simulated in a true three-dimensional visual mode and the crown fire spread three-dimensional visualization method can be applied to auxiliary fire-fighting decision, science popularization education, animation, games and the like.

Description

technical field [0001] The invention relates to the fields of forest fire prevention and computer simulation, in particular to a three-dimensional visualization method for tree crown fire spread. Background technique [0002] Forest fires are very destructive and difficult to put out and rescue. The occurrence and development of forest fires are affected by various factors such as fuel beds, weather and topography. According to different burning parts, forest fires can be mainly divided into surface fires, tree crown fires and underground fires. Most forest fires are surface fires, but under certain conditions, surface fires may develop into crown fires or both types of fires. Crown fire spreads quickly, burns at high temperature, and has high fire intensity. It has a great impact on forest vegetation and is difficult to extinguish, causing immeasurable losses. [0003] At present, technologies such as remote sensing and geographic information have played a great role in ...

AI Technical Summary

Problems solved by technology

Two-dimensional visualization is difficult to explicitly express fire behavior and the interaction process with environmental elements

At present, the trees in most forest fire scenes are expressed using Billboard technology, and the different organs and branches of different levels of trees are not represented separately, which is not conducive to expressing the interaction process between the fire in the crown and its components

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