How to FadeIn/FadeOut Manged DirectX3d

Hi Guys,

 

Any ideas how to create a full screen fadein / fadeout in Managed DirectX3d?

 

Thanks.

Use a screen sized quad and change it's alpha.

use gamma correction

use gamma correction

 

No!

 

The Gamma functions are very poorly supported in drivers. Just use a quad. It's very fast and efficient. You can also do much cooler effects than you can with Gamma. And it works on anything.

Hey,

 

Thank you all guys... as i understood correctly..

I'm building a black full screen texture and paste it over the current screen playing with it's alpha value.

 

I haven't tried it yet - but it should work.

 

Thanks.

You can save memory by skipping the texture. Just use a quad (2 triangles) and set their diffuse colour to black. Fiddle with the alpha and you're set.

You can save memory by skipping the texture. Just use a quad (2 triangles) and set their diffuse colour to black. Fiddle with the alpha and you're set.

 

Pardon me for asking, but how do i do that. I mean creating the traingles. Untill now i used only Textures and Surfaces with the Sprite class or UpdateSurface. :-\

 

I have the Device3D, and i have the back buffer surface.

 

Thanks, LDV.

Create a VertexBuffer, an array of vertices. Fill the vertices with data and set data to the VertexBuffer. Check the documentation. Although it's scarce I think there's a howto about this.

More problems ...

 

Ok, Guys, Thanks i did it.

 

But there is still a problem.

If i draw somethings uding .UpdateSurface or .StrechRectangle the quad shows transpernet on them. - that's OK.

But if i draw something using the Sprite object (Yes - with Alpha flags) it draw over the Quad, and i can not see the transpernt quad.

 

Maybe it's something for the order i do the:

m_sprite.Begin(SpriteFlags.AlphaBlend);??

 

Or maybe it's something using the .Z property??

 

Here is some code:

The Vertex:

m_device.RenderState.CullMode = Cull.None;

m_device.VertexFormat = CustomVertex.PositionColored.Format;

 

m_vertexFade = new VertexBuffer(typeof(CustomVertex.PositionColored), 6, m_device, 0, CustomVertex.PositionColored.Format, Pool.Default);

CustomVertex.PositionColored[] fverts = (CustomVertex.PositionColored[]) m_vertexFade.Lock(0, 0);

fverts[0] = new CustomVertex.PositionColored(0, 0, 1, m_clrFade.ToArgb());

fverts[1] = new CustomVertex.PositionColored(0, 768, 1, m_clrFade.ToArgb());

fverts[2] = new CustomVertex.PositionColored(1024, 768, 1, m_clrFade.ToArgb());

 

fverts[3] = new CustomVertex.PositionColored(0, 0, 1, m_clrFade.ToArgb());

fverts[4] = new CustomVertex.PositionColored(1024, 0, 1, m_clrFade.ToArgb());

fverts[5] = new CustomVertex.PositionColored(1024, 768, 1, m_clrFade.ToArgb());

m_vertexFade.Unlock();

 

The drawing of the obeject with Sprite object:

sprite.Draw(m_texture, m_rect[num], new Vector3(0, 0, 0), new Vector3(x, y, 0.5F), Color.FromArgb(255, 255, 255, 255));

 

Thank you all in advance, LDV

Try :

1)Setting the Z to 0

2)make sure you draw the Quad as the last thing.

First, DrunkenHyana i want to thank you for your truely help.

 

I tried to set them all Z to 0, and i checked i draw the Preimitve after i draw the Sprite and it didn't help.

 

I found another thing that was the problem.

 

I called Sprite.Flush() before i draw the primetives - that made it almost ok.

 

There are two new problems now:

1. Somehow i don't get the full fae out now, i set it all to Alpha-255,RGB 0,0,0 and still it looks darker but now totally black - before - it was all black, except for the Sprite object ofcousre.

2. The program is much slower now.

 

Thanks, LDV

You should be doing something like this:

 

device.BeginScene()

 

sprite.begin()

 

//Draw all sprites here

 

sprite.end()

 

//Draw quad here

 

device.endscene()