Parallel Radiosity Based Light Distribution Simulation within Virtual Plant Canopy

Authors

Can Hou, National Engineering Research Centre of Geospatial Information Technology, Spatial Information Research Center of Fujian Province, Fuzhou University, Fuzhou, 350002, China;
Liyu Tang, National Engineering Research Centre of Geospatial Information Technology, Spatial Information Research Center of Fujian Province, Fuzhou University, Fuzhou, 350002, China;
Chongcheng Chen, National Engineering Research Centre of Geospatial Information Technology, Spatial Information Research Center of Fujian Province, Fuzhou University, Fuzhou, 350002, China;
Yifei Yang, National Engineering Research Centre of Geospatial Information Technology, Spatial Information Research Center of Fujian Province, Fuzhou University, Fuzhou, 350002, China;

Abstract

Abstract: Owing to the computing-cost calculation of the form factor and the radiation energy in the traditional radiosity, a new method of parallel radiosity Based on CUDA (Compute Unified Device Architecture) was proposed to improve the performance of the implementation. Specifically, the implementation processes were as follows. The detailed 3D plant canopy model was loaded in the virtual scene. The solar altitude angle, solar azimuth and the radiation intensity were estimated according to the given time and the geographic location, and the light panel was generated afterwards, which was defined as radiation source on the basis of uniform triangular subdivision. To realize the parallel computation of light distribution within the virtual plant canopy, the 3D-discrete View Factor method was used to calculate the view factor and the corresponding radiation energy based on CUDA. The experimental results show that the presented algorithm can achieve a speed-up ratio about 20 with a considerable accuracy, compared to the traditional method running in the CPU.

Recommended Citation

Hou, Can; Tang, Liyu; Chen, Chongcheng; and Yang, Yifei (2020) "Parallel Radiosity Based Light Distribution Simulation within Virtual Plant Canopy," Journal of System Simulation: Vol. 27: Iss. 10, Article 17.
Available at: https://dc-china-simulation.researchcommons.org/journal/vol27/iss10/17

First Page

2337

Revised Date

2015-07-25

DOI Link

https://doi.org/

Last Page

2343

CLC

TP391.9

Recommended Citation

Hou Can, Tang Liyu, Chen Chongcheng, Yang Yifei. Parallel Radiosity Based Light Distribution Simulation within Virtual Plant Canopy[J]. Journal of System Simulation, 2015, 27(10): 2337-2343.