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Problem Transparent RenderTarget Texture

Started by Tradematrix Aug 26, 2003 at 12:36 PM 3 replies 800+ views

Original Post

Aug 26, 2003 at 12:36 PM

I Work with C# & DirectX 9 i create a texture with Usage.RenderTarget then i use Device.SetRenderTarget to set my texture surface 0 for render then i render something in the texture with Sprite.Draw i want the base color of my texture Transparent ! how can i do that if i make Device.Clear(D3D.ClearFlags.Target,Color.FromArgb(255,Color.Blue),1.0f,0); the part that must be transparent are blue ! this is my AlphaBlend RenderState : RenderState.AlphaBlendEnable = true; RenderState.SourceBlend = D3D.Blend.SourceAlpha; RenderState.DestinationBlend = D3D.Blend.InvSourceAlpha; can someone tell me method to do a transparent texture please.

Tommyboy

Sep 1, 2003 at 6:03 AM

send me your email address and I''ll email an example VS.NET 2003 solution.

Tommyboy

janos

Sep 1, 2003 at 12:06 PM

in what format have you created your render target?

Tommyboy

Sep 5, 2003 at 4:50 AM

I am using Managed DX9, and D3D for sprites not DirectDraw.

I also am not creating Primary/Secondary surfaces in code. I believe that windowed devices automatically create the primary surface for you.

I sent an email with project to you.

Tommyboy

Tommyboy

Sep 5, 2003 at 5:32 AM

BackBufferFormat is : X8R8G8B8

By the way,

Device.Clear(D3D.ClearFlags.Target,Color.FromArgb(255,Color.Blue),1.0f,0);

clears the render target to blue, if the sprite transparent color is not blue, then what you are describing is supposed to happen. To test if transparency is really working, create multiple sprites at various locations on your screen. Move one of your sprites around the screen, preferably over the top of other sprites. If transparency is not working you should be able to tell.

Tommyboy

[edited by - Tommyboy on September 6, 2003 5:27:36 AM]

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