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 DirectDraw 9 alphablending(Fading) VB.NET 2003

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Fraxx Daidouji Posted - May 23 2005 : 3:41:00 PM
I a wanting some help on how to fade images in DirectDraw9.

Example usage:
The screen starts out black and then fades to the main menu.
4   L A T E S T    R E P L I E S    (Newest First)
Knight Chat X Posted - May 28 2005 : 5:40:51 PM
'Alpha Channel Filter.
device.SetSamplerState(0, SamplerStageStates.MinFilter, Direct3D.TextureFilter.Linear)
device.SetSamplerState(0, SamplerStageStates.MagFilter, Direct3D.TextureFilter.Linear)

'Blend.
device.RenderState.AlphaBlendEnable = True
device.RenderState.SourceBlend = Blend.SourceAlpha
device.RenderState.DestinationBlend = Blend.InvSourceAlpha

I don't know which program you use for textures, but make sure whatever part you wish to have transparent/blended has the alpha channel set on the texture itself, when it is rendered it should be blended.
Fraxx Daidouji Posted - May 23 2005 : 9:24:32 PM
I know how to do it in Direct3D9 I just thought it might be eaiser in DirectDraw9 because my program is 2d graphics. I guess if I haft to go back to Direct3D9 I will. I program c script ruby and other languages like that. 3D gamestudio is one program. I just started geting into DirectX9 For Visual Basic .NET(I know how to program in VB.NET not at a professional level maby at an advanced level). DirectDraw9 seemed easy and I could get things done, but maby I should have checked it out a little more before I started using it.

Thanks for all information.
Eric Coleman Posted - May 23 2005 : 9:14:31 PM
I'm not sure if DirectDraw9 allows you to modify the screen gama, but that's an option in directdraw7.
Lachlan87 Posted - May 23 2005 : 7:42:17 PM
DirectDraw doesn't have this functionality built-in.

There are other options, but you won't like them. You could:

Use Direct3D for your 2D graphics.
Use a 3rd party engine.
Write your own fading code from scratch---Not easy for a beginner. (Meaning I can't tell you how).
Decide it's not worth it and abandon the idea.
Draw each stage of the fade by hand and make it an animation.

I hope this helps. . .Or at least doesn't hurt too much.

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