   How to cast D3DXVECTOR3 to const FLOAT*?
  Hi!I have a vector (D3DXVECTOR3 m_vPosition) with the coordinates of my camera. Is there a possibility to pass it to the following function?ID3DXEffect::SetFloatArray(D3DXHANDLE hParameter, const FLOAT *pf, UINT Count)Is there a way to cast the vector to const FLOAT* ?Thanx for any suggestion!SONB   
  D3DXVECTOR3 has a const FLOAT* cast operator, so there should be no problems passing one to the SetFloatArray method.;  So should I write the following:SetFloatArray("gEyePos", (const FLOAT *)m_vPosition.x, 3);Is it right?I tried it and the compiler says:error C2440: 'type cast' : cannot convert from 'float' to 'const FLOAT *';  Your code is trying to cast m_vPosition.x. x is a member of D3DXVECTOR3, of type float. The const FLOAT * operator is for D3DXVECTOR3 itself, not the individual float members. Just cast m_vPosition instead and it should work.   