7d769a8f4a
Each type of point coordinates has its own class with the name PointCoordinates*. Currently there is a PointCoordiantesArray that contains an ArrayHandle holding the point coordinates and a PointCoordinatesUniform that takes the standard extent, origin, and spacing for a uniform rectilinear grid and defines point coordiantes for that. Creating new PointCoordinates arrays is pretty easy, and we will almost definitely add more. For example, we should have an elevation version that takes uniform coordinates for a 2D grid and then an elevation in the third dimension. We can probably also use a basic composite point coordinates that can build them from other coordinates. There is also a DynamicPointCoordinates class that polymorphically stores an instance of a PointCoordinates class. It has a CastAndCall method that behaves like DynamicArrayHandle; it can call a functor with an array handle (possible implicit) that holds the point coordinates.
79 lines
3.0 KiB
C++
79 lines
3.0 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//
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// Copyright 2014 Sandia Corporation.
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// Copyright 2014 UT-Battelle, LLC.
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// Copyright 2014. Los Alamos National Security
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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#ifndef vtk_m_cont_internal_PointCoordinatesBase_h
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#define vtk_m_cont_internal_PointCoordinatesBase_h
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#include <vtkm/Types.h>
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#include <boost/static_assert.hpp>
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#include <boost/type_traits/is_base_of.hpp>
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/// Checks that the argument is a proper \c PointCoordinates class. This is a
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/// handy concept check for functions and classes to make sure that a template
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/// argument is actually point coordinates. (You can get weird errors elsewhere
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/// in the code when a mistake is made.)
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#define VTKM_IS_POINT_COORDINATES(pctype) \
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BOOST_STATIC_ASSERT_MSG( \
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::vtkm::cont::internal::IsValidPointCoordinates<pctype>::type::value, \
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"Provided type is not a valid VTK-m PointCoordinates type.")
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namespace vtkm {
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namespace cont {
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namespace internal {
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/// \brief Superclass for point coordinates classes.
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///
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/// \c PointCoordinatesBase is a simple superclass for all point coordinates
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/// classes (by convention named \c PointCoordinates___).
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///
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/// The most important feature of this base class is to provide a common class
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/// to perform a compile-time check to make sure a templated class is in fact
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/// supposed to be a point coordinate class. (It is assumed that the subclass
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/// will implement the expected methods.)
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///
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/// The second feature of this base class is to provide a type to perform safe
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/// up and down casts, although this is easy to get around.
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///
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class PointCoordinatesBase
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{
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public:
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// It is important to declare the destructor virtual so that subclasses will
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// be properly destroyed.
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virtual ~PointCoordinatesBase() { }
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};
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/// Checks to see if the given type is a valid point coordinates class. This
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/// check is compatable with the Boost meta-template programming library (MPL).
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/// It contains a typedef named type that is either boost::mpl::true_ or
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/// boost::mpl::false_. Both of these have a typedef named value with the
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/// respective boolean value.
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///
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template<typename Type>
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struct IsValidPointCoordinates {
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typedef typename boost::is_base_of<
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vtkm::cont::internal::PointCoordinatesBase,Type>::type type;
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};
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}
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}
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} // namespace vtkm::cont::internal
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#endif //vtk_m_cont_internal_PointCoordinatesBase_h
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