CASIA OpenIR  > 模式识别国家重点实验室  > 多媒体计算与图形学
Tree Branch Level of DetailModels for Forest Navigation
Xiaopeng Zhang1; Guanbo Bao1; Weiliang Meng1; Marc Jaeger2,3; Hongjun Li1,4; Oliver Deussen5,6; Baoquan Chen7
Source PublicationComputer Graphics Forum
AbstractWe present a level of detail (LOD) method designed for tree branches. It can be combinedwith methods for processing tree foliage
to facilitate navigation through large virtual forests. Starting from a skeletal representation of a tree, we fit polygon meshes of various densities to the skeleton while the mesh density is adjusted according to the required visual fidelity. For distant models, these branch meshes are gradually replaced with semi-transparent lines until the tree recedes to a few lines. Construction of these complete LOD models is guided by error metrics to ensure smooth transitions between adjacent LOD models. We then present an instancing technique for discrete LOD branch models, consisting of polygon meshes plus semi-transparent lines. Line models with different transparencies are instanced on the GPU by merging multiple tree samples into a single model. Our technique reduces the number of draw calls in GPU and increases rendering performance. Our experiments demonstrate that large-scale forest scenes can be rendered with excellent detail and shadows in real time.
KeywordLevel Of Detail Virtual Forests Real Time Branch Models Simplification
Indexed BySCI
Document Type期刊论文
Affiliation1.NLPR-LIAMA, Institute of Automation, CAS, China
2.AMAP, Cirad, France
3.LIRMM-ICAR,Montpellier University, France
4.Beijing Forestry University, China
5.VCC, Shenzhen Institute of Advanced Technology, CAS, China
6.Universitfat Konstanz, Germany
7.Shandong University, China
First Author AffilicationChinese Acad Sci, Inst Automat, Natl Lab Pattern Recognit, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Xiaopeng Zhang,Guanbo Bao,Weiliang Meng,et al. Tree Branch Level of DetailModels for Forest Navigation[J]. Computer Graphics Forum,2017(2017):1-16.
APA Xiaopeng Zhang.,Guanbo Bao.,Weiliang Meng.,Marc Jaeger.,Hongjun Li.,...&Baoquan Chen.(2017).Tree Branch Level of DetailModels for Forest Navigation.Computer Graphics Forum(2017),1-16.
MLA Xiaopeng Zhang,et al."Tree Branch Level of DetailModels for Forest Navigation".Computer Graphics Forum .2017(2017):1-16.
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