Real-time Generation Methods for Stand Three-dimensional Models

doi:10.13466/j.cnki.lyzygl.2019.04.015

Abstract

Abstract:

Aiming at the problem of insufficient ability of existing stand visualization simulation methods for representing tree diversity,a proposed method of constructing tree diversity three-dimensional models and the realized real-time establishment of stand three-dimensional models to visualize and visually reflect the three-dimensional structure of the forest.A three-dimensional simulation method of the trunk was proposed,and a 10-parameter power function for controlling crown curves was established to form a multi-direction crown control model of trees.Based on the Bézier curve,10 types of branch models were constructed.The algorithm of branch generation under crown control and the method of leaf simulation were proposed and the real-time construction of tree diversity three-dimensional model was realized.Based on the survey data of each tree,a stand real-time three-dimensional model was established according to the tree morphological data.The results showed that the canopy diversity model was effectively constructed,and the stand survey data could directly provide data support for the stand three-dimensional modeling.This method can realize the intuitive three-dimensional simulation of the tree diversity morphology and stand characteristic factors.

Key words: survey data, three-dimensional model, real-time generation, diversity, stand

CLC Number:

LI Yongliang, ZHU Nianfu, ZHANG Huaiqing, PENG Jiankang, YANG Tingdong. Real-time Generation Methods for Stand Three-dimensional Models[J]. FOREST RESOURCES WANAGEMENT, 2019, (4): 101-106.

Figures/Tables 10

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胸径/cm	树高/m	东枝下高/m	南枝下高/m	西枝下高/m	北枝下高/m	东冠高/m
18.2	14	7.8	7.4	8	8.6	8.7
南冠高/m	西冠高/m	北冠高/m	树冠东方向最大宽度/m	树冠南方向最大宽度/m	树冠西方向最大宽度/m	树冠北方向最大宽度/m
8.3	9.3	9.4	1.7	1.9	1.6	1.6

方向	胸径/cm	树高/m	树冠最大宽度/m	冠高/m	枝下高/m	β₁	β₂
东	21.3	15.6	2.1	8.8	6.8	2.8	3.0
南			2.6	8.5	6.0	3.6	3.5
西			2.3	9.8	7.3	3.0	3.2
北			1.7	10.4	8.0	2.6	2.4