Examples: webgl_postprocessing_hbao

[Rabbid76]

WebGL post processing example: HABO (Horizon Based Ambient Occlusion)

This contribution is funded by Rabbid76

[mrdoob]

Very nice!

[mrdoob]

Hmm... Is this based on N8AO?

[Rabbid76]

Hmm... Is this based on N8AO?

Sorry I didn't answer right away, but I didn't read your comment until now.
The basic idea is form realism-effects, since the algorithm there has some flaws, I did some more research and went the way of N8AO. I also took a closer look at the shaders https://github.com/nvpro-samples/gl_ssao/blob/master/hbao.frag.glsl and https://github.com/scanberg/hbao/blob/master/resources/shaders/hbao_frag.glsl. At the heart of these algorithms is something like dot(N, F) * fallOff.
Would you prefer a different algorithm for the example?

[N8python]

You mean cosine weighting the hemisphere? If you are already cosine-weighting your samples, you don't need to cosine-weight the hemisphere.

[Rabbid76]

You mean cosine weighting the hemisphere? If you are already cosine-weighting your samples, you don't need to cosine-weight the hemisphere.

I see. So I should remove cosineSampleHemisphere and calculate the samples differently. I can do that.

See #27185