Im getting crazy with this.. point me to any tutorial or something... What should I use? XMFLOAT# or XMVECTOR? Is this the correct way of load simple vectors, cause it looks terrible: XMVECTOR g_liteDir[2], g_liteCor[2]; g_liteDir[0] = XMLoadFloat4( XMFLOAT4(-0.577f, 0.577f, -0.577f, 1.0f) ); g_liteDir[1] = XMLoadFloat4( XMFLOAT4(0.0f, 0.0f, -1.0f, 1.0f) ); g_liteCor[0] = XMLoadFloat4( XMFLOAT4(0.5f, 0.5f, 0.5f, 0.0f) );//gray g_liteCor[1] = XMLoadFloat4( XMFLOAT4(0.5f, 0.0f, 0.0f, 0.0f) );//red --EDIT Im sorry, actually is much worse than that, I have to create XMFLOAT variables to pass it to XMLoadFloat4...jesus, cant be true.

Isn't there a function called 'XMVectorSet' or something? It's been a while since I used the XM* math stuff.

Dude, yes there is!!! that is MUCH better, thanks a lot ¦)

Do you know if converting from XMVECTOR to (float*) is ok?

Like in that situation:
XMVECTOR g_liteDir[2];
ID3DX11EffectVectorVariable *g_pvLiteDirVariable;

g_pvLiteDirVariable->SetFloatVectorArray( (FLOAT*)g_liteDir, 0, 2 );

The notes on MSDN say that it would be unsafe to do that. I suspect it will work for now, but it might break if they ever update how an XMVECTOR is stored in memory.