SDF Baker and Ray Marching

Features

SDF Baker

• Bake a single mesh info to a Texture3D asset.
• Has supported 2 methods: CPUBruteForce and GPUBruteForce.
• Method GPUJumpFloodingAlgorithm is in research.

Ray Marching

• Use simple Blinn-Phong lighting.
• Support 1 directional / point light, with soft shadow.
• Support up to 64 instances, 8 different sdf volume.
• Support transform of instances, include scaling.
• Not support hierarchy tranform of volumes.

References

SDF Rendering

• SIGNED DISTANCE FIELD RENDERING JOURNEY
  https://kosmonautblog.wordpress.com/2017/05/01/signed-distance-field-rendering-journey-pt-1/
  https://kosmonautblog.wordpress.com/2017/05/09/signed-distance-field-rendering-journey-pt-2/
• Ray Marching and Signed Distance Functions
  http://jamie-wong.com/2016/07/15/ray-marching-signed-distance-functions/#model-transformations
• soft shadows in raymarched SDFs
  https://iquilezles.org/www/articles/rmshadows/rmshadows.htm

SDF texture generation (Brute Force)

• distance to triangle
  https://iquilezles.org/www/articles/triangledistance/triangledistance.htm
• intersectors
  https://iquilezles.org/www/articles/intersectors/intersectors.htm
• Möller-Trumbore algorithm
  https://www.scratchapixel.com/lessons/3d-basic-rendering/ray-tracing-rendering-a-triangle/moller-trumbore-ray-triangle-intersection

SDF texture generation (Jump Flooding)

• Jump Flooding in GPU with Applications to Voronoi Diagram and Distance Transform
  https://www.comp.nus.edu.sg/~tants/jfa/i3d06.pdf
• Fast Voronoi Diagrams and Distance Field Textures on the GPU With the Jump Flooding Algorithm
  https://blog.demofox.org/2016/02/29/fast-voronoi-diagrams-and-distance-dield-textures-on-the-gpu-with-the-jump-flooding-algorithm/
• SDFTextureGenerator
  https://github.com/cecarlsen/SDFTextureGenerator

Others

• The Quest for Very Wide Outlines
  https://bgolus.medium.com/the-quest-for-very-wide-outlines-ba82ed442cd9
• Distance Fields
  https://prideout.net/blog/distance_fields/