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Chinese Conference on Image and Graphics Technologies

IGTA 2018: Image and Graphics Technologies and Applications pp 168–179Cite as

Real-Time Soft Shadow by A-Buffer

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Part of the book series: Communications in Computer and Information Science ((CCIS,volume 875))

Abstract

We present a new real-time soft shadow algorithm by A-Buffer in virtual environment. The key idea is to use A-Buffer to store the whole scene information and then to accurately compute soft shadow. In the first pass, the scenes are drawn in the center view of the complex area lights, and the target fragments of per pixel are stored into an A-Buffer. The second is to calculate the occlusion percentage according to the cone which is consisted of the shaded point and area lights from the view of the camera. The occlusion percentage is the ration of blocked area and sampled area within the cone, and it is used to calculate the shadow factor. Our algorithm could produce more realistic shadow effects in real-time and adapt to the complex scenes.

National High-tech R&D Program of China (863 Program): Grant No. 2015AA016405.

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Author information

Authors and Affiliations

  1. College of Computer Science, Sichuan University, Chengdu, 610065, China

    Dening Luo & Jianwei Zhang

Authors
  1. Dening Luo
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  2. Jianwei Zhang
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Corresponding author

Correspondence to Dening Luo .

Editor information

Editors and Affiliations

  1. Beijing Institute of Technology, Beijing, China

    Yongtian Wang

  2. Beihang University, Beijing, China

    Zhiguo Jiang

  3. Peking University, Beijing, China

    Yuxin Peng

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© 2018 Springer Nature Singapore Pte Ltd.

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Luo, D., Zhang, J. (2018). Real-Time Soft Shadow by A-Buffer. In: Wang, Y., Jiang, Z., Peng, Y. (eds) Image and Graphics Technologies and Applications. IGTA 2018. Communications in Computer and Information Science, vol 875. Springer, Singapore. https://doi.org/10.1007/978-981-13-1702-6_17

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  • DOI: https://doi.org/10.1007/978-981-13-1702-6_17

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-13-1701-9

  • Online ISBN: 978-981-13-1702-6

  • eBook Packages: Computer ScienceComputer Science (R0)

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