Pixel Shaders examples

[scottige]

Some of those are really nice and will really add to projects.

Would an under water effect be possible with a shader ?

If you had a ripple effect ( like the sin ) that could be changed at runtime and toned blueish, you could add a cool effect to an entire layer to make it look under water.

Just thinking aloud though as I don't really know the full potential or limitations of shaders.

[Sphax]

An underwater pixel shader is planned and I know exactly what features to add in it. Basically it will be a mix between blur, sinwave and blue mask.

[scottige]

Excellent.

That's nice to hear

[MrMan]

Since you are taking requests, how about a shader that makes a heat distortion, like that wavey shimmer you get off a road on a hot day?

[DizzyDoo]

An underwater pixel shader is planned and I know exactly what features to add in it. Basically it will be a mix between blur, sinwave and blue mask.

This is something I'm looking forward too. Good luck!

[Sylnade]

nice shaders sphax!

[Sphax]

Since you are taking requests, how about a shader that makes a heat distortion, like that wavey shimmer you get off a road on a hot day?

Since I can't get the pixel or the texture under the object, I can't do that...
But with the underwater shader you'll be able to blur+deform, so you'll probably be able to make this kind of effect.

[Maggott]

I have a project that I was trying to write my own pixel shader for, but I haven't been able to get it to work yet. It's pretty simple--it just needs to replace certain colors with other colors.

Specifically, the game I'm working on recolors the sprites, and each sprite can have up to 3 custom colors. That is accomplished by replacing all of the pure yellow, cyan, and magenta hues. So all the shader needs to do is something like this (this would be the example for replacing the magenta):

if pixel.red = pixel.blue and pixel.green = 0 then:
brightness = (pixel.red + pixel.blue) / 2
(Get RGB Values from specified replacement color for Magenta and place them in MagentaRed, MagentaGreen and MagentaBlue)
pixel.red = MagentaReplaceRed * brightness
pixel.green = MagentaReplaceGreen * brightness
pixel.blue = MagentaReplaceBlue * brightness

[Sphax]

Maggot, have a look to the example posted. You'll see that I've already done a pixel shader to do exactly what you want.

More precisely, I've done:
- Colorize Blue
- Colorize Cyan
- Colorize Green
- Colorize Grey
- Colorize Magenta
- Colorize RGB
- Colorize RGBYCM
- Colorize WRGB (W=Grey)

I think there is more than needed to do what you want

[Maggott]

Yay! And d'oh!

Apparently I only masquerade as a smart person.

Edit: I don't suppose I could see the source code? I had already tried to make my own but it didn't work. (It's half gibberish to me anyway--I work mostly in highly abstracted languages like Visual Basic and PHP, and I've never programmed a 3D application. I'm only just now starting to read through the HLSL documentation.)