DirectX errors Vector3

Question

Im using directxtutorial.com tutorial.. Im getting errors in these lines :

D3DXMatrixLookAtLH(&matView,
&D3DXVECTOR3 (0.0f, 8.0f, 25.0f),    // the camera position //error
&D3DXVECTOR3 (0.0f, 0.0f, 0.0f),      // the look-at position //error
&D3DXVECTOR3 (0.0f, 1.0f, 0.0f));    // the up direction //error

c++\test 1\test1\main.cpp|145|error: taking address of temporary [-fpermissive]

In all three of them. What do they mean and how can i fix them? I was googling for answers, but none has those errors in these lines. Thank you!

Answer 1

You are passing to the D3DXMatrixLookAtLH() function the address of temporary D3DXVECTOR3 objects.
Instead, try building these instances of D3DXVECTOR3 on the stack, and pass their addresses, e.g.:

D3DXVECTOR3 cameraPos(0.0f, 8.0f, 25.0f);
D3DXVECTOR3 lookAtPos(0.0f, 0.0f, 0.0f);
D3DXVECTOR3 upDir(0.0f, 1.0f, 0.0f);
// Assume that you have properly defined matView

D3DXMatrixLookAtLH(
  &matView,
  &cameraPos,
  &lookAtPos,
  &upDir);