alpha_rejection in texture_unit?

[DarkSun]

Hi All,

i was wondering why is alpha_rejection declared in texture_unit. AFAIK alpha test is done per fragment, not per texture unit...

[sinbad]

You're right, it should be on the Pass, not the TextureUnitState. I can't remember why it ended up there, it probably got mistakenly associated with the per-unit alpha operation at some point in the past and was never reviewed.

I'll have to think about what to do about that to minimise compatibility issues..

[sinbad]

Ok, I've moved alpha_rejection in Azathoth (1.0.0) up to the Pass. This is an interface breaking change, but not hard to resolve. We have a few others in Azathoth anyway

Hastur will remain as-is. It's strictly wrong, but we can't change it without breaking the interface, which is forbidden in maintenance releases.

[karmaGfa]

Hello,

in the 0.15 version, when I use the line :

alpha_rejection greater_equal 128

the rejected pixels are the ones whose alpha is < 128 (checked with TheGimp v2.0 with the tool "pick color") ... is it normal or it is an inversion bug ?

Vincent

[karmaGfa]

I think I understand ... this is the documentation that is not clear :

In the doc, there is :

Default: alpha_rejection always_pass

.. so I guess that the condition is not for the rejected pixels but the opposite, for the accepted pixel. The documentation should precise it or the command name should be changed into alpha_acceptation !