Reflection (Background) Shader

[Pixelthief]

This is a fairly simple shader I created in response to this thread:
http://www.clickteam.com/epicenter/ubbthreads.php?ubb=showflat&Number=190757#Post1907 57


Unfortunately, I do not know how to create a background shader that uses alpha blending to blend with the same background. This merely reflects the background- but thats still pretty handy.

If anyone with the technical knowledge knows how to blend a background (ie to make this object semitransparent) please, feel free to alter this shader and post it up!


Parameters:
fCoeff:
Ratio of 0.0 to 1.0 of the image to be reflected. Only one side of this line will be reflected, proportional to how far down it is- in the exact middle (0.5), it creates a 1:1 reflection, whereas at say 0.75, it will be a 3:1 reflection
Mode:
Changes the direction of the reflection.
0 = Bottom
1 = Top
2 = Left
3 = Right


Example screenshot:




(Put the effects in your "MMF2/Effect" folder, and then you can access them inside your project. You will need to put the effects in that folder in order to open the example file)

[Pixelthief]

With the help of Looki, I've updated this shader:
http://www.clickteam.com/epicenter/ubbthreads.php?ubb=showflat&Number=191331#Post1913 31

It nows has an additional parameter, fBlend
This is a value from 0.0 to 1.0
0.0 = Fully Opaque (all reflection)
1.0 = Fully Transparent (no visible effect)


This allows it to render semitransparent backgrounds, making it perfect for 'water' effects in a game- simply use an object overlaying the water, and give it this effect.



Updated Download is attached
This has been edited since V2
Now reflects Dyna's code from the post below

[Looki]

Erm, Dynasoft actually provided a better way to do this.

You don't need the Src/Dest stuff, just do
return float4(tex2D(bg,In).rgb,fAlpha);