View shader on Shadertoy - Published on 2018-09-04
These shaders are my implementation of the raytracer described in the (excellent) book "Raytracing in one weekend" [1] by Peter Shirley (@Peter_shirley). I have tried to follow the code from his book as much as possible, but I had to make some changes to get it running in a fragment shader:
- There are no classes (and methods) in glsl so I use structs and functions instead. Inheritance is implemented by adding a type variable to the struct and adding ugly if/else statements to the (not so overloaded) functions.
- The scene description is procedurally implemented in the world_hit function to save memory.
- The color function is implemented using a loop because it is not possible to have a recursive function call in glsl.
- Only one sample per pixel per frame is calculated. Samples of all frames are added in Buffer A and averaged in the Image tab.
You can find the raytracer / pathtracer in Buffer A.
- Chapter 7: Diffuse https://www.shadertoy.com/view/llVcDz
- Chapter 9: Dielectrics https://www.shadertoy.com/view/MlVcDz
- Chapter 11: Defocus blur https://www.shadertoy.com/view/XlGcWh
- Chapter 12: Where next? https://www.shadertoy.com/view/XlycWh
- Chapter 6: Rectangles and lights https://www.shadertoy.com/view/4tGcWD
- Chapter 7: Instances https://www.shadertoy.com/view/XlGcWD
- Chapter 8: Volumes https://www.shadertoy.com/view/XtyyDD
- Chapter 9: A Scene Testing All New Features https://www.shadertoy.com/view/MtycDD
[1] http://in1weekend.blogspot.com/2016/01/ray-tracing-in-one-weekend.html
Source: Buffer A.glsl
- iChannel0: Buffer A (linear, clamp, vflipped)
Source: Image.glsl
- iChannel0: Buffer A (linear, clamp, vflipped)
- RIOW 1.11: Defocus Blur on Shadertoy
- An overview of all my shaders
- My public profile on Shadertoy
- http://in1weekend.blogspot.com/2016/01/ray-tracing-in-one-weekend.html
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.