Pixel Shader Question

[fzammetti]

[refractor]

In the code you posted, you forgot to return finalCol, and you want to shift the values down before you average them to get something like:

finalCol=((color&red_mask)>>10 + (color&green_mask)>>5 + (blue&blue_mask))/3;
finalCol+=(finalCol<<10 + finalcol<<5);
return finalCol;


The other reason that it may look "odd" when you use your fader is that you're decreasing the colours all by the same delta.

Consider a colour that's comprised of:

Red: 31
Green: 15
Blue: 15

And your decrement is 5 for all three colours. You're just going to be left with a mid-intensity red
:
Red: 16
Green: 0
Blue: 0

after 3 decrements, not the:

Red: 16
Green: 7
Blue: 7
(poor accuracy but nevermind) that you would get by decrementing the intensities proportionally to their start intensity.

Cheers,

Ref.

[damian]

[damian]

[fzammetti]

[damian]

[draklava]

Speaking of samples... would someone be so kind as to post the support code for a shader. Like the calls you would use in your gameLoop to implement a shader. I noticed the SetPixelShader function but perhaps an example using the FadeShader would be helpful to me.

Thanks!

[fzammetti]

display->SetPixelShader(&yourShader);

yourShader is simply an instance of your pixel shader... display is, well, you know!

From that point on, until you change it, every pixel rendered will be processed by your pixel shader.

[damian]

[damian]

OK, finished, might be of help:



Just a quick demo of 3 lame pixel shaders... tap the stylus to cycle between them.

[HTK]

[Conan]

[fzammetti]

[HTK]

[damian]