Управление камерой при помощи мыши

float vx = 0.0f, vy = 0.0f, vz = 1.0f;
//Получаем координаты мыши клиентского окна
vx = mpos(hwnd_).x * (float) 0.01;
vy = mpos(hwnd_).y * (float) 0.01;
 
float vr = (float)(sqrt(pow(vx, 2) + pow(vy, 2) + pow(vz, 2)));
 
float vtx = (float)(sin(vx) * sin(vy)) * vr;
float vty = (float)(cos(vy)) * vr;
float vtz = (float)(sin(vy) * cos(vx)) * vr;
 
lookTargetPostion_ = D3DXVECTOR3(vtx, vty, vtz);    
 
if (pIDirect3DDevice9_->SetTransform(D3DTS_VIEW, &getCameraSettings()) != D3D_OK) {
 
    msg_er_full;
}

D3DXMATRIX Camera::getCameraSettings()
{
    D3DXVec3Normalize(&lookTargetPostion_, &lookTargetPostion_);
 
    D3DXVec3Cross(&upPosition_, &lookTargetPostion_, &rightPositition_);
    D3DXVec3Normalize(&upPosition_, &upPosition_);
 
    D3DXVec3Cross(&rightPositition_, &upPosition_, &lookTargetPostion_);
    D3DXVec3Normalize(&rightPositition_, &rightPositition_);
 
    (cameraSettings_)(0, 0) = rightPositition_.x; (cameraSettings_)(0, 1) = upPosition_.x; (cameraSettings_)(0, 2) = lookTargetPostion_.x; (cameraSettings_)(0, 3) = 0.0f;
    (cameraSettings_)(1, 0) = rightPositition_.y; (cameraSettings_)(1, 1) = upPosition_.y; (cameraSettings_)(1, 2) = lookTargetPostion_.y; (cameraSettings_)(1, 3) = 0.0f;
    (cameraSettings_)(2, 0) = rightPositition_.z; (cameraSettings_)(2, 1) = upPosition_.z; (cameraSettings_)(2, 2) = lookTargetPostion_.z; (cameraSettings_)(2, 3) = 0.0f;
    (cameraSettings_)(3, 0) = -D3DXVec3Dot(&rightPositition_, &cameraPosition_); (cameraSettings_)(3, 1) = -D3DXVec3Dot(&upPosition_, &cameraPosition_); (cameraSettings_)(3, 2) = -D3DXVec3Dot(&lookTargetPostion_, &cameraPosition_); (cameraSettings_)(3, 3) = 1.0f;
 
    return cameraSettings_;
}