Directx D3DXMatrixLookAtLH prob?

hello!!!

where to start....

well I am writing a simple program to load X files, In the program i have setup several functions for camera movement...

now based on the users input, i have setup these functions to adjust the camera source/target accordingly through the D3DXMatrixLookAtLH function, then pass the D3DXMATRIX through the g_pD3D->SetTransform(D3DTS_VIEW, &matView);

now my prob is when i pass the D3DXVERTEX3 variable as the source in the D3DXMatrixLookAtLH function, being the second parameter, it tells me that it is expecting a constant expression instead of a literal expresion.

also with the error it says that no user defined operator is given to make the conversion, or operator cannot be called.

sorry for the sparactic thought, i haven't sleep in what feels like days!

anyway here is the code snipplet:
enjoy....

Code:

---

void vSetupView()
{
        D3DXMATRIX        m;
        D3DXMATRIX        matView;
        D3DXMATRIX        matRotate;
        D3DXMATRIX        matProj;
        D3DXVECTOR3        matSource;
        D3DXVECTOR3        matTarget;

        D3DXMatrixRotationX(&m, xRotation);
                matRotate = matRotate * m;
        D3DXMatrixRotationY(&m, yRotation); 
                matRotate = matRotate * m;
        D3DXMatrixRotationZ(&m, xRotation);
                matRotate = matRotate * m;

        //set zoom and height strafe
        matSource.x = xAdjust;
        matSource.y = yAdjust;
        matSource.z = -30.0f;

        matTarget.x = xAdjust;
        matTarget.y = yAdjust;
        matTarget.z = 0.0f;

        matSource.x = matSource.x + (Zoom * (matTarget.x -                matSource.x));
        matSource.y = matSource.y + (Zoom * (matTarget.y -                matSource.y));
        matSource.z = matSource.z + (Zoom * (matTarget.z -                matSource.z));

        matTarget.x = matTarget.x + (Zoom * (matTarget.x -                matSource.x));
        matTarget.y = matTarget.y + (Zoom * (matTarget.y -                matSource.y));
        matTarget.z = matTarget.z + (Zoom * (matTarget.z -                matSource.z));

       

        D3DXMatrixLookAtLH( &matView, matSource,
                                                                  matTarget,
                                                                  D3DXVECTOR3(0.0f, 1.0f, 0.0f);

        matView = matView * matRotate;

        D3DXMatrixPerspectiveFovLH                                                          (&matProj, D3DX_PI/4, 1.0f, 1.0f, 500.0f);

        g_pD3DDevice->SetTransform
                                          (D3DTS_VIEW, &matView);
        g_pD3DDevice->SetTransform
                                    (D3DTS_PROJECTION, &matProj);
}

---

that is it...

well any help is appreciated, i know it is something simple and i am not thinking right now, :) thanks frog22


We'd enjoy it more if it had code tags. Hammer

You forgot a paranthesis on the call to D3DXMatrixLookAtLH.

sorry that wasn't it, althought thank you for the reply anyway!!

For the same call , you need to pass the address of the variables...for example..

Code:

---

D3DXMatrixLookAtLH( &mat1, &mat2, &mat3, &D3DXVector3( 1.0f, 2.0f, 3.0f ) );

---

well that was it.... lol i have spent the last 2 hours going over the prob and that was it.

thanks mr wizard...