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Ridcully

D3DXMesh and alpha blending

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what i want to do is load a .x file that contains translucent parts into an D3DXMesh interface, and render it correctly. this doesn''t seem to work, not even with the dx8 samples that display x files. i found out that a D3DXMesh vertexbuffer doesn''t contain color information for the vertices, so i can''t set the alpha value there. but the material that is used to render the translucent parts of the models has a diffuse and ambient alpha value set. but the problem is that d3d doesn''t display that. anyway i couldn''t find out how to get it to work thanks for any suggestions ridcully

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i have a quite big problem with alpha blending i think.
i am trying only to render one triangle onto another with alpha blending, but i can't achieve the effect i want to see.

what do i have to do to do alpha blending with d3d8? i currently set the D3DRS_ALPHABLENDENABLE and the D3DRS_DESTBLEND and SRCBLEND, then i set a material with alpha values, but that doesn't work. am i missing something obvious there?

thanks
ridcully


here is some code snippet


D3DMATERIAL8 mtrl;
ZeroMemory( &mtrl, sizeof(D3DMATERIAL8) );
mtrl.Diffuse.r = mtrl.Ambient.r = 1.0f;
mtrl.Diffuse.g = mtrl.Ambient.g = 1.0f;
mtrl.Diffuse.b = mtrl.Ambient.b = 1.0f;
mtrl.Diffuse.a = mtrl.Ambient.a = 0.5f;
m_pd3dDevice->SetMaterial( &mtrl );

m_pd3dDevice->SetRenderState( D3DRS_ALPHABLENDENABLE, TRUE );
m_pd3dDevice->SetRenderState( D3DRS_SRCBLEND, D3DBLEND_SRCCOLOR );
m_pd3dDevice->SetRenderState( D3DRS_DESTBLEND, D3DBLEND_INVSRCCOLOR );
m_pd3dDevice->SetTexture(0, 0);
m_pd3dDevice->SetStreamSource( 0, m_pVB, sizeof( VERTEX ) );
m_pd3dDevice->SetVertexShader( VERTEXFORMAT );


Edited by - Ridcully on February 19, 2001 10:38:28 AM

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