Method ComputeViewTransform

Rendering/Core/vtkCamera.cxx:360–387

------------------------------------------------------------------------------ The ViewTransform depends on only three ivars: the Position, the FocalPoint, and the ViewUp vector. All the other methods are there simply for the sake of the users' convenience.

// FocalPoint, and the ViewUp vector.  All the other methods are there
// simply for the sake of the users' convenience.
void vtkCamera::ComputeViewTransform()
{
  // main view through the camera
  this->Transform->Identity();
  if (this->UserViewTransform)
  {
    this->Transform->Concatenate(this->UserViewTransform);
  }
  if (!this->UseOffAxisProjection)
  {
    this->Transform->SetupCamera(this->Position, this->FocalPoint, this->ViewUp);
  }
  else
  {
    double pe[3] = { 0.0 };
    this->GetStereoEyePosition(pe);

    // Create the view point offset matrix
    vtkSmartPointer<vtkMatrix4x4> T = vtkSmartPointer<vtkMatrix4x4>::New();
    T->SetElement(0, 3, -pe[0]);
    T->SetElement(1, 3, -pe[1]);
    T->SetElement(2, 3, -pe[2]);

    this->Transform->Concatenate(T);
  }
  this->ViewTransform->Identity();
  this->ViewTransform->Concatenate(this->Transform->GetMatrix());
}

//------------------------------------------------------------------------------
void vtkCamera::ComputeCameraLightTransform()