Experiments

This repo contains some experiments I’ve been doing with openGL, trying to implement various computer graphics techniques.

Not all the experiments are successfull, some are still WIP, I may come back to them one day.

Link to the repo

List of experiments

Voxel based global illumination

This is a simple implementation of voxel cone tracing.

Here’s a little write up about that technique and its implementation.

Global Illumination with Light Propagation Volumes

This is an incomplete implementation of Light Propagation Volumes.

Here’s a little write up about the implementation.

Spherical Harmonics Viewer

A little tool to view spherical harmonics that I built while reading about them.

GPU Bitonic Sort

An implementation of bitonic sort using compute shaders, with a little visualization.

Write up

N-Bodies

Implementation of N-bodies simulation.

Here’s a little write up about it

Fast Fourier Transform

Implementation of 1D and 2D fourier transform and inverse fast fourier transform.

Write up

This shows a signal (Top plot) that gets transformed in frequency space (Middle plot), and reconstructed using inverse fourier transform (Bottom Plot)

This shows an image input with its Fourier transform on the right, and the reconstructed image at the bottom.

Ocean FFT

This is an implementation of an ocean simulation with fourier transform, based on this paper

Here is a little write up about the implementation

Pic Flip Fluid

This is an implementation of Pic-Flip fluid simulation

Here’s a little write up about the implementation

Decals

This is an implementation of deferred decals.

Write up

Here’s a little write up about the implementation

Path Tracer

This is a simple path tracer, based on Demofox’s series on path tracing.

Tiled Rendering

This is an implementation of Clustered and Forward+ rendering, with performance comparisons with forward and deferred.

Write up

Screen Space Ambient Occlusion

Simple implementation of SSAO, based on LearnOpenGL’s

Write up

Screen Space Reflections

Simple implementation of screen space reflections, without fallback for out of screen reflections.

Write up

Post Processing

Some simple post processing effects :

Chromatic Aberation

Depth Of Field

CRT Effects

God Rays

Vignette

Sharpen Filter

Order Independant Transparency

Implementation of order independant transparency, based on LearnOpenGL’s

Not sure if it’s fully working…

Write up

Cascaded Shadow Mapping

Implementation of cascaded shadow mapping, based on LearnOpenGL’s

Write up

Shell Fur

Implementation of Shell Fur algorithm.

Sparse Virtual Texturing

Implementation of Sparse Virtual Textures. It’s almost working, just a problem to solve on the edges of the sub textures.

Write up

Screen Space Directional Occlusion

Implementation of Screen Space Directional Occlusion.

I don’t know if it’s really working, getting odd results..

Subdivision Surface

Implementation of Subdivision Surface algorithm.

Write up

Sparse Voxel Octree

Implementation of sparse voxel octree construction and rendering on the GPU.

Kuwahara Filtering

Implementation of Kuwahara Filter for images

Write up

Reflective Shadow Map

This is a failed attempt at implementing this technique. I’m not sure why it’s not working, I may try to fix it later.

Write up