Various experiments with raytracing and raymarching done only in pixel (fragment) shaders.
Written in GLSL but supports C++ and HLSL using preprocessor macro tricks. The C++11 work is made possible by the wonderful CxxSwizzle library. (https://github.com/gwiazdorrr/CxxSwizzle)
The various submodules are enabled via global defines:
| Project define | Description | Live on shadertoy.com |
|---|---|---|
| APP_PLANET | stylized procedural terrain and clouds | https://www.shadertoy.com/view/ldyXRw |
| APP_ATMOSPHERE | study of Rayleigh/Mie air scattering | https://www.shadertoy.com/view/XtBXDz |
| APP_CLOUDS | study of volumetric clouds | https://www.shadertoy.com/view/XtBXDw |
| APP_EGG | signed distance field raymarcher animation | https://www.shadertoy.com/view/MlsGDf |
| APP_RAYTRACER | simple PBR raytracer with reflection | https://www.shadertoy.com/view/Xl2XW1 |
| APP_SDF_AO | test for ambient occlusion with distance fields | https://www.shadertoy.com/view/XtBGDW |
- Visual Studio C++ 2015. Has a dependency on SDL 1.2 (included).
- C4droid on Android.
- any GLSL ES environment. Tested on Shadertoy and GLSL Sandbox.
- any DirectX 11 HLSL environment. Tested with included hlsltoy utility. Has a dependency on DirectXTex library (external repository reference).
Over time various things were added and some can be extracted and used separately.
- minimal raytracer framework
- minimal Cook-Torrence lighting and material setup
- signed distance field functions and operators
- 2D two bone IK solver
- a library of different noise functions
- Rayleigh/Mie atmospheric scattering solver
- primitive animated GIF output
The util/ folder contains separate, independent projects:
| Project | Description |
|---|---|
| inclxpnd | a bare-bones #include expander utility to compose files |
| hlsltoy | minimal one-file DX 11 framework that runs a fullscreen pixel shader |
| ddsvolgen | 3D noise texture generator |