Render to texture and transparency

RMI

28-08-2012 09:37:02

Hello,

I want to have a render to texture with transparency, but i have a correct image but i don't have the transparency.
This is my code

For initialize my render texture



      textureColor = TextureManager.Singleton.CreateManual("ColorTexture", ResourceGroupManager.DEFAULT_RESOURCE_GROUP_NAME, TextureType.TEX_TYPE_2D, 640, 480, 0, PixelFormat.PF_R8G8B8, (int)TextureUsage.TU_DYNAMIC_WRITE_ONLY_DISCARDABLE);



      renderMaterial.SetSceneBlending(SceneBlendType.SBT_TRANSPARENT_ALPHA);

      renderMaterial.CreateTechnique().CreatePass();

      Pass pass = renderMaterial.GetTechnique(0).GetPass(0);

      pass.LightingEnabled = false;

      pass.SetSceneBlending(SceneBlendType.SBT_TRANSPARENT_ALPHA);

      pass.DepthWriteEnabled = false;

      pass.CreateTextureUnitState("ColorTexture");

      pass.SetSceneBlending(SceneBlendType.SBT_TRANSPARENT_ALPHA);

//To render my texture





byte[] _byColors;

...

//For each pixel i want to make transparency

              _byColors[iTransparentScreenIndex] = 0;//blue

              _byColors[iTransparentScreenIndex + 1] = 0;//green

              _byColors[iTransparentScreenIndex + 2] = 0; //red

              _byColors[iTransparentScreenIndex + 3] = 255; //Alpha



//Copy the data in the texture

      GCHandle handle = GCHandle.Alloc(_byColors, GCHandleType.Pinned);

      IntPtr pointer = handle.AddrOfPinnedObject();

      PixelBox pixelBox = new PixelBox(640, 480, 1, PixelFormat.PF_A8R8G8B8, pointer);



      HardwarePixelBufferSharedPtr pixelBuffer = textureColor.GetBuffer();

      pixelBuffer.BlitFromMemory(pixelBox);

      handle.Free();

Can you help me please ?

thanks