Comments for post 2011-02-10-improved-light-attenuation

[tommadams]

Comments for blog post 2011-02-10-improved-light-attenuation

[tommadams]

comment imported from WordPress
Matt Enright said on 2011-02-10 14:05:30:

You encouraged me to take another look at my attenuation function this morning. Subtracting off the tail was indeed causing some banding.

My solution is a bit different, and would gently end any attenuation function regardless of the inner math because it is just multiplied through.

term = 1 - smoothstep(saturate(d / dmax))^4
light *= term * att

where smoothstep(x) = x*x*(3 - 2*x)

It tends to preserve the brightness of the light until about half way out.

[tommadams]

comment imported from WordPress
bongju kim said on 2011-11-28 06:52:39:

wow excellent~
i'm wondering how implement attenuation equation in opengl es 2.0.
thanks your post.

[tommadams]

comment imported from WordPress
Jesús said on 2019-01-20 16:29:30:

This post comes a bit late but I just wanted to share my attenuation function, which is simpler and (I think) has all the benefits exposed above:
f_att = (1 - min(d / dmax, 1))^2;
Thanks for the great posts in your website :-)