C++ Volume Rendering

A volume rendering application with different techniques, trying to be as similar as possible to the results from each paper. Any contribution is welcome!

Project settings

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• Developed using Visual Studio cmake extension (2017, 2019).

• Using C++ and GLSL

• Uses glew, freeglut/glfw and glm

• Supported Volumes: .raw, .pvm and .syn

• Supported Transfer Functions: 1D Piecewise linear .tf1d

• Additional data

Implemented methods

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• 1-Pass - Ray Casting

  • Structured Single-pass GLSL Ray Casting

• 1-Pass - Ray Casting - Cone Ground Truth (Steps)

  • Structured Single-pass Ray Casting: Directional Ambient Occlusion and Shadows with Cone Tracing
  • Ray Tracing Ground Truth
  • Implements:
    • Directional Ambient Occlusion
    • Cone Shadows

• 1-Pass - Ray Casting - Dir. Occlusion Shading

  • Structured Single-pass Ray Casting: Directional Ambient Occlusion and Shadows with Cone Tracing
  • Leonardo Q. Campagnolo, Waldemar Celes. Interactive directional ambient occlusion and shadow computations for volume ray casting. Computers & Graphics, Volume 84, 2019, Pages 66-76, ISSN 0097-8493. doi: 10.1016/j.cag.2019.08.009.
  • Links: Elsevier

• 1-Pass - Ray Casting - Extinction-based

  • Structured Single-pass Ray Casting: Extinction-based shading
  • Schlegel, P, Makhinya, M, Pajarola, R. Extinction-based shading and illumination in gpu volume ray-casting. IEEE Transactions on Visualization and Computer Graphics 2011 Dec;17(12):1795–1802. doi: 10.1109/TVCG.2011.198.
  • Links: IEEE
  • Missing: Ambient Occlusion with Color Bleeding
  • Summed Area Table (SAT) built with extinction coefficient (on CPU).

• 1-Pass - Ray Casting - Voxel Cone Tracing

  • Single-GPU version implemented just for render comparison
  • Structured Single-pass Ray Casting: Voxel Cone Tracing Shadows
  • Shih, M., Rizzi, S., Insley, J.A., Uram, T.D., Vishwanath, V., Hereld, M., Papka, M.E., & Ma, K. (2016). Parallel distributed, GPU-accelerated, advanced lighting calculations for large-scale volume visualization. 2016 IEEE 6th Symposium on Large Data Analysis and Visualization (LDAV), 47-55. doi: 10.1109/LDAV.2016.7874309.
  • Links: IEEE

• Slice-based - Directional Occlusion

  • Structured Slice-based Texture Mapping: Directional Occlusion Shading Model
  • Schott, M., Pegoraro, V., Hansen, C., Boulanger, K. and Bouatouch, K. (2009), A Directional Occlusion Shading Model for Interactive Direct Volume Rendering. Computer Graphics Forum, 28: 855-862. doi:10.1111/j.1467-8659.2009.01464.x.
  • Links: ACM

Screenshot

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