https://github.com/theolundqvist/parallax-voxel-ray-marcher

Project in High Performance Computer Graphics (3rd place) at LTH by Theodor Lundqvist, Jiuming Zeng and Jintao Yu.
https://github.com/theolundqvist/parallax-voxel-ray-marcher

Last synced: 4 days ago
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Project in High Performance Computer Graphics (3rd place) at LTH by Theodor Lundqvist, Jiuming Zeng and Jintao Yu.

• Host: GitHub
• URL: https://github.com/theolundqvist/parallax-voxel-ray-marcher
• Owner: theolundqvist
• License: unlicense
• Created: 2023-11-01T06:52:47.000Z (about 1 year ago)
• Default Branch: main
• Last Pushed: 2023-12-30T11:05:44.000Z (11 months ago)
• Last Synced: 2024-08-01T21:42:26.425Z (3 months ago)
• Language: C++
• Homepage:
• Size: 1.31 MB
• Stars: 12
• Watchers: 1
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGES.rst

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README

        
## Parallax Voxel Ray Marcher

Project in High Performance Computer Graphics (3rd place) at LTH by Theodor Lundqvist, Jiuming Zeng and Jintao Yu.

Video:

https://youtu.be/21KFuvCqHIU

Paper:

[Parallax Voxel Ray Marcher.pdf](https://github.com/theolundqvist/parallax-voxel-ray-marcher/files/13754011/Parallax.Voxel.Ray.Marcher.pdf)



            

              



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Some personal notes:

### GRID TRAVERSAL

voxel traversal using FVTA algorithm 

http://www.cse.yorku.ca/~amana/research/grid.pdf

### MODELS

Models can be converted from mesh to voxel grid using online resources

https://github.com/davidstutz/mesh-voxelization

https://drububu.com/miscellaneous/voxelizer/?out=obj

### voxel ray marching techniques 

how Teardown does it: 

https://www.youtube.com/watch?v=0VzE8ROwC58

distance fields - can be made fast on gpu but still slower it seems

https://www.youtube.com/watch?v=REKcTBgkrsE

parallax voxel raymarching

https://www.youtube.com/watch?v=h81I8hR56vQ

### atomotage engine

- https://www.youtube.com/watch?v=nr5JqYYye3w

- https://www.youtube.com/watch?v=4AYBm-9cBqs

- https://www.youtube.com/watch?v=1sfWYUgxGBE

### moving voxelvolumes around and intersecting.

Have to disable early depth test since depth can change in fragment shader.

Though we can use an extension:

https://www.khronos.org/opengl/wiki/Fragment_Shader#Conservative_Depth

```glsl

layout (depth_less) out float gl_FragDepth;

```

To say that we always will move the pixel closer than the plane it was rendered on, which is the only thing we will do when rendering backfaces

cool examples:

https://www.shadertoy.com/view/cdsGz7

https://www.shadertoy.com/view/dtVSzw

https://www.shadertoy.com/view/tdlSR8