#raymarching

[blake447]

That was a lot of chessposting. Have some quaternion julia sets, as a treat These act as 3D slices of 4D extensions of julia sets. I believe this one is cubic in nature. To render these we use some math I dont understand from this blog to generate a distance estimator that can then be used to raymarch the sets. Raymarching is essentially marching along rays coming from the camera, only moving as far as we know we can move safely in any direction, until we hit something. This safe distance is where the distance estimator comes in. Anyways pretty pictures

This one I have a 3D print of

And this one I've colored the slice of it based on the coloration of the corresponding 2D julia set

[connorbell]

[dontcode]

[eullee]

Shader습작 <Glow Effect>

도형에 닿지 못하고 MAX distance로 빠져버리는 ray에 한정하여, marching steps에 따라(도형 근처를 지나는 ray일수록, marching steps가 많아진다) 차등적으로 특정 색을 먹이면, 도형 주위로 아우라가 생기는것 마냥 Glow Effect를 만들 수 있다. 

Fog Effect를 넣어도, 넣지 않아도 둘 다 느낌이 괜찮다. 

무언가 Holy한 느낌을 자아낼 필요가 있을때 사용하면 좋을 효과다.

Glow – can be added simply by mixing in a color based on the number of ray steps taken (points close to the fractal will use more ray steps, even if they miss the fractal, so pixels close to the object will glow) 

[arcanelab]

There are some great graphics-programming related articles on this site (among other great content).

[lavender-berry-jam]

blobby references: 1 2 3

[connorbell]

[dontcode]