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- // Boost.Geometry Index
- //
- // R-tree OpenGL drawing visitor implementation
- //
- // Copyright (c) 2011-2013 Adam Wulkiewicz, Lodz, Poland.
- //
- // Use, modification and distribution is subject to the Boost Software License,
- // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt)
- #ifndef BOOST_GEOMETRY_INDEX_DETAIL_RTREE_UTILITIES_GL_DRAW_HPP
- #define BOOST_GEOMETRY_INDEX_DETAIL_RTREE_UTILITIES_GL_DRAW_HPP
- #include <boost/mpl/assert.hpp>
- namespace boost { namespace geometry { namespace index { namespace detail {
- namespace utilities {
- namespace dispatch {
- template <typename Point, size_t Dimension>
- struct gl_draw_point
- {};
- template <typename Point>
- struct gl_draw_point<Point, 2>
- {
- static inline void apply(Point const& p, typename coordinate_type<Point>::type z)
- {
- typename coordinate_type<Point>::type const& x = geometry::get<0>(p);
- typename coordinate_type<Point>::type const& y = geometry::get<1>(p);
- /*glBegin(GL_POINT);
- glVertex3f(x, y, z);
- glEnd();*/
- glBegin(GL_QUADS);
- glVertex3f(x+1, y, z);
- glVertex3f(x, y+1, z);
- glVertex3f(x-1, y, z);
- glVertex3f(x, y-1, z);
- glEnd();
- }
- };
- template <typename Box, size_t Dimension>
- struct gl_draw_box
- {};
- template <typename Box>
- struct gl_draw_box<Box, 2>
- {
- static inline void apply(Box const& b, typename coordinate_type<Box>::type z)
- {
- glBegin(GL_LINE_LOOP);
- glVertex3f(geometry::get<min_corner, 0>(b), geometry::get<min_corner, 1>(b), z);
- glVertex3f(geometry::get<max_corner, 0>(b), geometry::get<min_corner, 1>(b), z);
- glVertex3f(geometry::get<max_corner, 0>(b), geometry::get<max_corner, 1>(b), z);
- glVertex3f(geometry::get<min_corner, 0>(b), geometry::get<max_corner, 1>(b), z);
- glEnd();
- }
- };
- template <typename Segment, size_t Dimension>
- struct gl_draw_segment
- {};
- template <typename Segment>
- struct gl_draw_segment<Segment, 2>
- {
- static inline void apply(Segment const& s, typename coordinate_type<Segment>::type z)
- {
- glBegin(GL_LINES);
- glVertex3f(geometry::get<0, 0>(s), geometry::get<0, 1>(s), z);
- glVertex3f(geometry::get<1, 0>(s), geometry::get<1, 1>(s), z);
- glEnd();
- }
- };
- template <typename Indexable, typename Tag>
- struct gl_draw_indexable
- {
- BOOST_MPL_ASSERT_MSG((false), NOT_IMPLEMENTED_FOR_THIS_TAG, (Tag));
- };
- template <typename Box>
- struct gl_draw_indexable<Box, box_tag>
- : gl_draw_box<Box, geometry::dimension<Box>::value>
- {};
- template <typename Point>
- struct gl_draw_indexable<Point, point_tag>
- : gl_draw_point<Point, geometry::dimension<Point>::value>
- {};
- template <typename Segment>
- struct gl_draw_indexable<Segment, segment_tag>
- : gl_draw_segment<Segment, geometry::dimension<Segment>::value>
- {};
- } // namespace dispatch
- template <typename Indexable> inline
- void gl_draw_indexable(Indexable const& i, typename coordinate_type<Indexable>::type z)
- {
- dispatch::gl_draw_indexable<
- Indexable,
- typename tag<Indexable>::type
- >::apply(i, z);
- }
- } // namespace utilities
- namespace rtree { namespace utilities {
- namespace visitors {
- template <typename Value, typename Options, typename Translator, typename Box, typename Allocators>
- struct gl_draw : public rtree::visitor<Value, typename Options::parameters_type, Box, Allocators, typename Options::node_tag, true>::type
- {
- typedef typename rtree::internal_node<Value, typename Options::parameters_type, Box, Allocators, typename Options::node_tag>::type internal_node;
- typedef typename rtree::leaf<Value, typename Options::parameters_type, Box, Allocators, typename Options::node_tag>::type leaf;
- inline gl_draw(Translator const& t,
- size_t level_first = 0,
- size_t level_last = (std::numeric_limits<size_t>::max)(),
- typename coordinate_type<Box>::type z_coord_level_multiplier = 1
- )
- : tr(t)
- , level_f(level_first)
- , level_l(level_last)
- , z_mul(z_coord_level_multiplier)
- , level(0)
- {}
- inline void operator()(internal_node const& n)
- {
- typedef typename rtree::elements_type<internal_node>::type elements_type;
- elements_type const& elements = rtree::elements(n);
- if ( level_f <= level )
- {
- size_t level_rel = level - level_f;
- if ( level_rel == 0 )
- glColor3f(0.75f, 0.0f, 0.0f);
- else if ( level_rel == 1 )
- glColor3f(0.0f, 0.75f, 0.0f);
- else if ( level_rel == 2 )
- glColor3f(0.0f, 0.0f, 0.75f);
- else if ( level_rel == 3 )
- glColor3f(0.75f, 0.75f, 0.0f);
- else if ( level_rel == 4 )
- glColor3f(0.75f, 0.0f, 0.75f);
- else if ( level_rel == 5 )
- glColor3f(0.0f, 0.75f, 0.75f);
- else
- glColor3f(0.5f, 0.5f, 0.5f);
- for (typename elements_type::const_iterator it = elements.begin();
- it != elements.end(); ++it)
- {
- detail::utilities::gl_draw_indexable(it->first, level_rel * z_mul);
- }
- }
-
- size_t level_backup = level;
- ++level;
- if ( level < level_l )
- {
- for (typename elements_type::const_iterator it = elements.begin();
- it != elements.end(); ++it)
- {
- rtree::apply_visitor(*this, *it->second);
- }
- }
- level = level_backup;
- }
- inline void operator()(leaf const& n)
- {
- typedef typename rtree::elements_type<leaf>::type elements_type;
- elements_type const& elements = rtree::elements(n);
- if ( level_f <= level )
- {
- size_t level_rel = level - level_f;
- glColor3f(0.25f, 0.25f, 0.25f);
- for (typename elements_type::const_iterator it = elements.begin();
- it != elements.end(); ++it)
- {
- detail::utilities::gl_draw_indexable(tr(*it), level_rel * z_mul);
- }
- }
- }
- Translator const& tr;
- size_t level_f;
- size_t level_l;
- typename coordinate_type<Box>::type z_mul;
- size_t level;
- };
- } // namespace visitors
- template <typename Rtree> inline
- void gl_draw(Rtree const& tree,
- size_t level_first = 0,
- size_t level_last = (std::numeric_limits<size_t>::max)(),
- typename coordinate_type<
- typename Rtree::bounds_type
- >::type z_coord_level_multiplier = 1
- )
- {
- typedef utilities::view<Rtree> RTV;
- RTV rtv(tree);
- if ( !tree.empty() )
- {
- glColor3f(0.75f, 0.75f, 0.75f);
- detail::utilities::gl_draw_indexable(tree.bounds(), 0);
- }
- visitors::gl_draw<
- typename RTV::value_type,
- typename RTV::options_type,
- typename RTV::translator_type,
- typename RTV::box_type,
- typename RTV::allocators_type
- > gl_draw_v(rtv.translator(), level_first, level_last, z_coord_level_multiplier);
- rtv.apply_visitor(gl_draw_v);
- }
- }} // namespace rtree::utilities
- }}}} // namespace boost::geometry::index::detail
- #endif // BOOST_GEOMETRY_INDEX_DETAIL_RTREE_UTILITIES_GL_DRAW_HPP
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