Lightmap-based GI Collaborative Rendering System for Web3D Application

doi:10.16182/j.issn1004731x.joss.19-VR0471

Abstract

Abstract: For the real-time dynamic lighting rendering in low-end web environment, a view-independent collaborative real-time rendering system is presented. The whole system consists of a cloud renderer which produces the global illumination, a web renderer which computes the local illumination, and a scalable collaboration solution which takes the user behavior into account to adjust the range and frequency of the lighting computation. The cloud renderer computes the lighting data into the Lightmap, streams the Lightmap to the web client. After computing the direct light, the web renderer achieves the global illumination information by Sampling the Lightmap, and shows the realistic scene. The results show that the system has a good performance both in the web and cloud renderer, and can achieve less computation in the lighting rendering and more realistic look in the final frame.

Key words: lightmap, Web3D, collaborative rendering system, voxel based global illumination, view independent rendering

CLC Number:

TP391.9

Shao Wei, Liu Chang, Jia Jinyuan. Lightmap-based GI Collaborative Rendering System for Web3D Application[J]. Journal of System Simulation, 2020, 32(4): 649-659.

References 21

[1]	Crassin C, LuebkE D, Mara M, et al. CloudLight: A System for Amortizing Indirect Lighting in Real-Time Rendering[J]. Journal of Computer Graphics Techniques (S2331-7418), 2015, 4(4): 1-27.
[2]	Liu C, Ooi W T, Jia J, et al.Cloud baking: Collaborative scene illumination for dynamic Web3D scenes[J]. ACM Transactions on Multimedia Computing, Communications and Applications (S1551-6857), 2018, 14(3s): 1-20.
[3]	Huang C Y, Chen D Y, Hsu C H, et al.Gaminganywhere: An open-source cloud gaming testbed[C]// MM 2013-Proceedings of the 2013 ACM Multimedia Conference. New York, NY, USA: Association for Computing Machinery, 2013: 827-830.
[4]	Koller D, Turitzin M, Levoy M, et al.Protected interactive 3D graphics via remote rendering[J]. ACM Transactions on Graphics (S0730-0301), 2004, 23(3): 695.
[5]	Shi S, Nahrstedt K, Campbell R.A real-time remote rendering system for interactive mobile graphics[J]. ACM Transactions on Multimedia Computing, Communications, and Applications (S1551-6857), 2012, 8(3s): 1-20.
[6]	Maamar H R, Boukerche A, Petriu E.Streaming 3D meshes over thin mobile devices[J]. IEEE Wireless Communications (S1536-1284), 2013, 20(3): 136-142.
[7]	Liu C, Jia J, Zhang Q, et al.Lightweight WebSIM Rendering Framework Based on Cloud-Baking[C]// New York, NY, USA: Association for Computing Machinery, 2017: 221-229.
[8]	刘畅, 贾金原, 陆一凡, 等. 光图树:Web3D动态场景全局光照的协同实时渲染[J]. 系统仿真学报, 2019, 31(8): 1591-1604.Liu Chang, Jia Jinyuan, Lu Yifan, et al.GI-Map Tree: Global Illumination Collaborative Real-Time Rendering in Web3D Dynamic Scene[J]. Journal of System Simulation, 2019, 31(8): 1591-1604.
[9]	Bugeja K, Debattista K, Spina S.An asynchronous method for cloud-based rendering[J]. Visual Computer, Springer Berlin Heidelberg (S0178-2789), 2018: 1-14.
[10]	Voglreiter P, Dokter M, Neff T.Shading atlas streaming[C]//SIGGRAPH Asia 2018 Technical Papers. New York, NY, USA: SIGGRAPH Asia 2018. 2018, 37(6).
[11]	Keller A.Instant radiosity[C]// Proceedings of the 24th annual conference on Computer graphics and interactive techniques SIGGRAPH 97, 1997, 31(3): 49-56.
[12]	Dachsbacher C, Stamminger M.Reflective Shadow Maps[C]. Proceedings of the 14th Eurographics workshop on Rendering. New York, NY, USA: Association for Computing Machinery, 2003(1): 197-201.
[13]	Luksch C, Tobler R F, Habel R, et al.Fast light-map computation with virtual polygon lights[C]. Proceedings of the Symposium on Interactive 3D Graphics. New York, NY, USA: Association for Computing Machinery, 2013: 87-94.
[14]	Thiedemann S, Henrich N, Grosch T, et al.Voxel-based global illumination[C]//Proceedings of the Symposium on Interactive 3D Graphics. New York, NY, USA: ACM, 2011: 103-110.
[15]	Sloan P P, Kautz J, Snyder J.Precomputed radiance transfer for real-time rendering in dynamic, low-frequency lighting environments[C]//Proceedings of the 29th Annual Conference on Computer Graphics and Interactive Techniques, SIGGRAPH ’02. New York, NY, USA: Association for Computing Machinery, 2002: 527-536.
[16]	Öztürk B, Akyüz A O.Semi-dynamic light maps[C]. ACM SIGGRAPH 2017 Posters, SIGGRAPH 2017. New York, NY, USA: Association for Computing Machinery, 2017: 1-2.
[17]	Zhou K, Synder J, Guo B, et al.Iso-charts: Stretch-driven mesh parameterization using spectral analysis[C]//ACM International Conference Proceeding Series. New York, NY, USA: Association for Computing Machinery, 2004, 71: 45-54.
[18]	Apers D, Edblom P, Rousiers C de, et al. Interactive Light Map and Irradiance Volume Preview in Frostbite[G]//HAINES E, AKENINE-MÖLLER T. Ray Tracing Gems. Berkeley, CA: Apress, 2019: 377-407.
[19]	Pantel L, Wolf L C.On the suitability of dead reckoning schemes for games[C]. New York, NY, USA: Association for Computing Machinery, 2004: 79-84.
[20]	Akenine-Moller T, Haines E, Hoffman N.Deferred Shading[G]//Fourth Edition. Real-time rendering. AK Peters/CRC Press, 2018: 883.
[21]	Crassin C, Neyret F, Sainz M, et al.Interactive indirect illumination using voxel cone tracing[J]. Computer Graphics Forum (S1467-8659), 2011, 30(7): 1921-1930.