Virtual forest emulation information multi-stage linkage method based on scene roaming and system of virtual forest emulation information multi-stage linkage method

Abstract

The invention relates to a virtual forest emulation information multi-stage linkage method based on scene roaming. The method comprises the following steps that: (1) a forest growth model is used for calculating the biomass size of each tree, and a virtual forest scene is drawn on a computer screen; (2) emulation events in the virtual forest emulation scene real-time interaction roaming process are identified in an automatic mode; (3) a view point and tree visibility distance reference table is formed; (4) a new view point and visibility distance reference table is formed; (5) a linkage mode of the virtual forest emulation information during the granularity conversion is determined; (6) linkage strategies for modifying the tree biomass in the forest scene are determined; and (7) a tree visual model corresponding to the new tree biomass is found from a scene database, and the virtual forest scene is drawn again on the computer screen. The invention also relates to a system for realizing the method. The method and the system effectively solve the problem of too long time consumption during the virtual forest emulation scene conversion, and the scene operation real-time performance is improved.

Description

technical field [0001] The invention belongs to the field of virtual reality technology, and relates to a multi-level linkage method and system for virtual forest simulation information based on scene roaming. Background technique [0002] The simulation of large-scale virtual forest scene includes the changes of tree growth at different time and space scales under the influence of dynamic environment. On the spatio-temporal scale, the forest scene can be divided into three different granularity scenes: fine-grained single-tree scene, medium-grained stand scene and coarse-grained full-stand scene. Existing forest simulation systems generally use a corresponding growth model or simulation technology to perform single-grained forest growth simulation for their specific application requirements. These systems are often individually designed and developed for individual needs. When users need to switch from one granularity scene to another granularity scene, they need to recalc...

AI Technical Summary

Problems solved by technology

These systems are often individually designed and developed for individual needs. When users need to switch from one granularity scene to another granularity scene, they need to recalculate according to the tree growth model and environmental factors. The calculation process is very time-consuming.

Since these virtual forest simulation systems do not establish the correlation between different granularity scene information, it is impossible to quickly switch from one granularity simulation scene to another granularity simulation scene, which seriously affects the large-scale forest scene drawing and roaming speed.

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