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3
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1answer
52 views

Repeating alpha over/under operation multiple times

I have two RGBA colors in linear [0..1] space, src and dst and I want to alpha blender src ...
1
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0answers
36 views

Sorting my geometry for alpha testing

Here is my predicament. I am trying to draw a multitude of dots that leave trails behind them real time. Heres the difficulty, that line fades. Each dot line has a defined z position and the goal ...
2
votes
2answers
66 views

How to perform additive blending in Metal. What do these terms mean?

Forgive me, I dont really understand the basis of alpha blending. Like I know the formula but when it comes to the terms blending operation, source blend factor, and destination blend factor I am ...
1
vote
1answer
49 views

Are w3.org docs correct?

I'm referring to this section: https://www.w3.org/TR/compositing-1/#simplealphacompositing Considering the formula co = Cs x αs + Cb x αb x (1 - αs) the docs state ...
4
votes
1answer
69 views

Avoid having an opaque and transparent variant of each pixel shader

Transparency can be achieved (or actually approximated) by using alpha-to-coverage (in case of MSAA) or basic alpha/transparency blending using the following approach: Bind a rasterizer state with a ...
1
vote
1answer
58 views

Make Object created in a list blend in/dissolve out of a scene

I have a number of (opaque) objects created using the glGenLists() glNewList() utilities. As generated, the Alpha values are all set to 1 Is there a way to make these objects when summoned blend into ...