ShaderPart.reflect function

[aerys]

ShaderPart.reflect function

[Harmek]

Hi @sindney ,
Wolfram will explain it better than me, but the formula seems correct.
Do you have a case where it causes you trouble?

[JMLX42]

I think we're using this method for both environment mapping and specular lighting. And we didn't have any issue so far and the formula is pretty much exactly what Wolfram suggest as Harmek pointed out :)

Can you please elaborate on the issue you encounter?
Do you have some screenshots, videos or app. that could demonstrate the issue?

[makc]

@sindney

r = 2_(n_l)*n - l,

if you dot this by n you get r_n = 2(n_l)_1 - (n_l) = n*l which means both r and l point in the same direction - and in case of reflection this should be the opposite.

[JMLX42]

@makc that's a very elegant demonstration :)
@sindney I'll close the issue for now, please feel free to re-open it or fill a new one if you have more inputs on your problem

[sindney]

@promethe42 @Harmek @makc Wait wait, check this out. http://postimage.org/image/xcqbva17f/

[sindney]

@promethe42 @Harmek @makc Oh, i get it, our desired reflect result wasn't the same. http://postimage.org/image/bjoar1zl3/