Bluddy alpha-blending again. Ok, I want to be able to control the translucency level of a polygon (and it''s texture) by specifying an alpha value in the diffuse colour component in each vertex. I''m halfway there; I can get it to blend smoothly from solid to 50/50. It''s like the alpha stops at 128 or something (it doesn''t :p). When I remove the poly''s texture, I can gain full alpha control with the bare polys. So what difference does the texture make? Texture is 16-Bit (R5G6B5) BackBuffer/Primary is 16-Bit (R5G6B5) Material diffuse shares the Material ambient settings (1,1,1,1) Light (directional) is bright white (255,255,255,255) Here''s a portion of the main loop (I''m still playing so ignore the ton of state changes per cycle :p)

  lpDevice->Clear(0, NULL, D3DCLEAR_TARGET, 
                              D3DCOLOR_XRGB(0,0,0),1.0f,0);

  lpDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE);
  lpDevice->SetRenderState(D3DRS_SRCBLEND,D3DBLEND_SRCALPHA); 
  lpDevice->SetRenderState(D3DRS_DESTBLEND,D3DBLEND_INVSRCALPHA);

  lpDevice->BeginScene();

  hr = lpDevice->SetTexture(0,TextureList[0]);
   
    SetupLights();
    SetupMatrices();
  lpDevice->SetStreamSource(0,lpVB,sizeof(CUSTOM_VERTEX));
  lpDevice->SetVertexShader(D3DFVF_CUSTOM_VERTEX);
  
  lpDevice->DrawPrimitive(D3DPT_TRIANGLELIST, 0, 
                                               sm_map->numpolys);
  lpDevice->EndScene();
  lpDevice->Present(NULL, NULL, NULL, NULL);

 

Anyone know anything I should know? I''d appreciate any help as this is *really* slowing me down! Cheers,

Gazza,

Oh God. Oh God.

YOU ARE A GOD.

Thank you so much! That was driving me nuts! I can't thank you enough - now I can get on with what I was doing about 2 weeks ago. Thanks again! =)



Edited by - CGI Joe on January 12, 2001 3:06:11 AM