CPointCloudColoured.h

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/* +---------------------------------------------------------------------------+
   |          The Mobile Robot Programming Toolkit (MRPT) C++ library          |
   |                                                                           |
   |                       http://www.mrpt.org/                                |
   |                                                                           |
   |   Copyright (C) 2005-2011  University of Malaga                           |
   |                                                                           |
   |    This software was written by the Machine Perception and Intelligent    |
   |      Robotics Lab, University of Malaga (Spain).                          |
   |    Contact: Jose-Luis Blanco  <jlblanco@ctima.uma.es>                     |
   |                                                                           |
   |  This file is part of the MRPT project.                                   |
   |                                                                           |
   |     MRPT is free software: you can redistribute it and/or modify          |
   |     it under the terms of the GNU General Public License as published by  |
   |     the Free Software Foundation, either version 3 of the License, or     |
   |     (at your option) any later version.                                   |
   |                                                                           |
   |   MRPT is distributed in the hope that it will be useful,                 |
   |     but WITHOUT ANY WARRANTY; without even the implied warranty of        |
   |     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         |
   |     GNU General Public License for more details.                          |
   |                                                                           |
   |     You should have received a copy of the GNU General Public License     |
   |     along with MRPT.  If not, see <http://www.gnu.org/licenses/>.         |
   |                                                                           |
   +---------------------------------------------------------------------------+ */

#ifndef opengl_CPointCloudColoured_H
#define opengl_CPointCloudColoured_H

#include <mrpt/opengl/CRenderizable.h>
#include <mrpt/opengl/COctreePointRenderer.h>
#include <mrpt/utils/PLY_import_export.h>

namespace mrpt
{
        namespace opengl
        {
                class OPENGL_IMPEXP CPointCloudColoured;

                // This must be added to any CSerializable derived class:
                DEFINE_SERIALIZABLE_PRE_CUSTOM_BASE_LINKAGE( CPointCloudColoured, CRenderizable, OPENGL_IMPEXP )


                /** A cloud of points, each one with an individual colour (R,G,B). The alpha component is shared by all the points and is stored in the base member m_color_A.
                  *
                  *  To load from a points-map, CPointCloudColoured::loadFromPointsMap().
                  *
                  *   This class uses smart optimizations while rendering to efficiently draw clouds of millions of points,
                  *   as described in this page: http://www.mrpt.org/Efficiently_rendering_point_clouds_of_millions_of_points
                  *
                  *  \sa opengl::COpenGLScene, opengl::CPointCloud
                  *
                  *  <div align="center">
                  *  <table border="0" cellspan="4" cellspacing="4" style="border-width: 1px; border-style: solid;">
                  *   <tr> <td> mrpt::opengl::CPointCloudColoured </td> <td> \image html preview_CPointCloudColoured.png </td> </tr>
                  *  </table>
                  *  </div>
                  *
                  * \ingroup mrpt_opengl_grp
                  */
                class OPENGL_IMPEXP CPointCloudColoured :
                        public CRenderizable,
                        public COctreePointRenderer<CPointCloudColoured>,
                        public mrpt::utils::PLY_Importer,
                        public mrpt::utils::PLY_Exporter
                {
                        DEFINE_SERIALIZABLE( CPointCloudColoured )

                public:
                        struct TPointColour
                        {
                                inline TPointColour() { }
                                inline TPointColour(float _x,float _y,float _z,float _R,float _G,float _B ) : x(_x),y(_y),z(_z),R(_R),G(_G),B(_B) { }
                                float x,y,z,R,G,B;      // Float is precission enough for rendering
                        };

                private:
                        typedef std::vector<TPointColour> TListPointColour;
                        TListPointColour        m_points;

                        typedef TListPointColour::iterator iterator;
                        typedef TListPointColour::const_iterator const_iterator;
                        inline iterator begin() { return m_points.begin(); }
                        inline const_iterator begin() const { return m_points.begin(); }
                        inline iterator end() { return m_points.end(); }
                        inline const_iterator end() const { return m_points.end(); }


                        float                           m_pointSize; //!< By default is 1.0
                        bool                            m_pointSmooth; //!< Default: false
                        mutable volatile size_t m_last_rendered_count, m_last_rendered_count_ongoing;

                        /** Constructor
                          */
                        CPointCloudColoured( ) :
                                m_points(),
                                m_pointSize(1),
                                m_pointSmooth(false),
                                m_last_rendered_count(0),
                                m_last_rendered_count_ongoing(0)
                        {
                        }
                        /** Private, virtual destructor: only can be deleted from smart pointers */
                        virtual ~CPointCloudColoured() { }

                        void markAllPointsAsNew(); //!< Do needed internal work if all points are new (octree rebuilt,...)

                public:

                        /** @name Read/Write of the list of points to render
                            @{ */

                        /** Inserts a new point into the point cloud. */
                        void push_back(float x,float y,float z, float R, float G, float B);

                        /** Set the number of points, with undefined contents */
                        inline void resize(size_t N) { m_points.resize(N); }

                        /** Like STL std::vector's reserve */
                        inline void reserve(size_t N) { m_points.reserve(N); }

                        /** Read access to each individual point (checks for "i" in the valid range only in Debug). */
                        inline const TPointColour &operator [](size_t i) const {
#ifdef _DEBUG
                                ASSERT_BELOW_(i,size())
#endif
                                return m_points[i];
                        }

                        /** Read access to each individual point (checks for "i" in the valid range only in Debug). */
                        inline const TPointColour &getPoint(size_t i) const {
#ifdef _DEBUG
                                ASSERT_BELOW_(i,size())
#endif
                                return m_points[i];
                        }

                        /** Read access to each individual point (checks for "i" in the valid range only in Debug). */
                        inline mrpt::math::TPoint3Df getPointf(size_t i) const {
#ifdef _DEBUG
                                ASSERT_BELOW_(i,size())
#endif
                                return mrpt::math::TPoint3Df(m_points[i].x,m_points[i].y,m_points[i].z);
                        }

                        /** Write an individual point (checks for "i" in the valid range only in Debug). */
                        void setPoint(size_t i, const TPointColour &p );

                        inline size_t size() const { return m_points.size(); } //!< Return the number of points

                        inline void clear() { m_points.clear(); markAllPointsAsNew(); }  //!< Erase all the points


                        /** Load the points from a points map (passed as a pointer), depending on the type of point map passed: for the case of a mrpt::slam::CColouredPointMap the colours of individual points will be also copied.
                          *  The possible classes accepted as arguments are: mrpt::slam::CColouredPointsMap, or in general any mrpt::slam::CPointsMap.
                          * \note The method is a template since CPointsMap belongs to a different mrpt library.
                          */
                        template <class POINTSMAP>
                        void  loadFromPointsMap( const POINTSMAP *m)
                        {
                                if (m->hasColorPoints())
                                {
                                        size_t N = m->size();
                                        m_points.resize(N);
                                        for (size_t i=0;i<N;i++)
                                        {
                                                m->getPoint(i,
                                                        m_points[i].x,
                                                        m_points[i].y,
                                                        m_points[i].z,
                                                        m_points[i].R,
                                                        m_points[i].G,
                                                        m_points[i].B );
                                        }
                                }
                                else
                                {
                                        // Default colors:
                                        vector_float    xs,ys,zs;
                                        m->getAllPoints(xs,ys,zs);

                                        size_t N = xs.size();
                                        m_points.resize(N);
                                        const mrpt::utils::TColorf col(m_color);
                                        for (size_t i=0;i<N;i++)
                                        {
                                                m_points[i].x = xs[i];
                                                m_points[i].y = ys[i];
                                                m_points[i].z = zs[i];
                                                m_points[i].R = col.R;
                                                m_points[i].G = col.G;
                                                m_points[i].B = col.B;
                                        }
                                }
                                markAllPointsAsNew();
                        }

                        /** Get the number of elements actually rendered in the last render event. */
                        size_t getActuallyRendered() const { return m_last_rendered_count; }

                        /** @} */


                        /** @name Modify the appearance of the rendered points
                            @{ */

                        inline void setPointSize(float pointSize) { m_pointSize = pointSize; }
                        inline float getPointSize() const { return m_pointSize; }

                        inline void enablePointSmooth(bool enable=true) { m_pointSmooth=enable; }
                        inline void disablePointSmooth() { m_pointSmooth=false; }
                        inline bool isPointSmoothEnabled() const { return m_pointSmooth; }

                        /** @} */


                        /** Render */
                        void  render() const;

                        /** Render a subset of points (required by octree renderer) */
                        void  render_subset(const bool all, const std::vector<size_t>& idxs, const float render_area_sqpixels ) const;

                protected:
                        /** @name PLY Import virtual methods to implement in base classes
                            @{ */
                        /** In a base class, reserve memory to prepare subsequent calls to PLY_import_set_vertex */
                        virtual void PLY_import_set_vertex_count(const size_t N);
                        /** In a base class, reserve memory to prepare subsequent calls to PLY_import_set_face */
                        virtual void PLY_import_set_face_count(const size_t N) {  } 
                        /** In a base class, will be called after PLY_import_set_vertex_count() once for each loaded point. 
                          *  \param pt_color Will be NULL if the loaded file does not provide color info.
                          */
                        virtual void PLY_import_set_vertex(const size_t idx, const mrpt::math::TPoint3Df &pt, const mrpt::utils::TColorf *pt_color = NULL);
                        /** @} */

                        /** @name PLY Export virtual methods to implement in base classes
                            @{ */

                        /** In a base class, return the number of vertices */
                        virtual size_t PLY_export_get_vertex_count() const;

                        /** In a base class, return the number of faces */
                        virtual size_t PLY_export_get_face_count() const { return 0; }

                        /** In a base class, will be called after PLY_export_get_vertex_count() once for each exported point. 
                          *  \param pt_color Will be NULL if the loaded file does not provide color info.
                          */
                        virtual void PLY_export_get_vertex(
                                const size_t idx, 
                                mrpt::math::TPoint3Df &pt, 
                                bool &pt_has_color,
                                mrpt::utils::TColorf &pt_color) const;

                        /** @} */


                };

                OPENGL_IMPEXP mrpt::utils::CStream& operator>>(mrpt::utils::CStream& in,  CPointCloudColoured::TPointColour &o);
                OPENGL_IMPEXP mrpt::utils::CStream& operator<<(mrpt::utils::CStream& out, const CPointCloudColoured::TPointColour &o);

        } // end namespace

        namespace utils
        {
                using namespace mrpt::opengl;

                // Specialization must occur in the same namespace
                MRPT_DECLARE_TTYPENAME(CPointCloudColoured::TPointColour)
        }

} // End of namespace


#endif