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#pragma once

#include <pcl/pcl_exports.h>
#include <pcl/point_cloud.h>
#include <pcl/point_types.h>
#include <pcl/surface/3rdparty/opennurbs/opennurbs.h>
#include <pcl/PolygonMesh.h>

#include <pcl/surface/on_nurbs/nurbs_data.h>

namespace pcl
{
  namespace on_nurbs
  {

    /** \brief Functions for NURBS surface triangulation, trimming and curve sampling. */
    class PCL_EXPORTS Triangulation
    {
      protected:
        /** \brief Create indices for triangulation. */
        static void
        createIndices (std::vector<pcl::Vertices> &vertices, unsigned vidx, unsigned segX, unsigned segY);

        /** \brief Create vertices (cloud) for triangulation. */
        static void
        createVertices (pcl::PointCloud<pcl::PointXYZ>::Ptr &cloud, float x0, float y0, float z0, float width,
                        float height, unsigned segX, unsigned segY);

      public:
        static bool
        isInside(const ON_NurbsCurve &curve, const pcl::PointXYZ &v);

        //      /** \brief Converts an NurbsObject to a pcl::PolygonMesh by sampling all NURBS according to the resolution specified.
        //       *  \param[in] object The NURBS object.
        //       *  \param[out] mesh The pcl::PolygonMesh
        //       *  \param[in] resolution mesh resolution (number of vertices along each of the two dimensions of the surface. */
        //      static void
        //      convertObject2PolygonMesh (const NurbsObject &object, PolygonMesh &mesh, unsigned resolution);

        /** \brief Converts an openNURBS NurbsSurface to a pcl::PolygonMesh by sampling the NURBS according to the resolution specified.
         *  \param[in] nurbs The openNURBS surface.
         *  \param[out] mesh The pcl::PolygonMesh
         *  \param[in] resolution mesh resolution (number of vertices along each of the two dimensions of the surface. */
        static void
        convertSurface2PolygonMesh (const ON_NurbsSurface &nurbs, PolygonMesh &mesh, unsigned resolution);

        /** \brief Converts an openNURBS NurbsSurface to a pcl::PolygonMesh by sampling the NURBS according to the resolution specified.
         *  \param[in] nurbs The nurbs surface.
         *  \param[in] curve The nurbs curve for trimming (direction of curve decides if inside or outside is trimmed)
         *  \param[out] mesh The pcl::PolygonMesh
         *  \param[in] resolution mesh resolution (number of vertices along each of the two dimensions of the surface. */
        static void
        convertTrimmedSurface2PolygonMesh (const ON_NurbsSurface &nurbs, const ON_NurbsCurve &curve, PolygonMesh &mesh,
                                           unsigned resolution);
        static void
        convertTrimmedSurface2PolygonMesh (const ON_NurbsSurface &nurbs, const ON_NurbsCurve &curve, PolygonMesh &mesh,
                                           unsigned resolution, vector_vec3d &start, vector_vec3d &end);

        /** \brief Converts an openNURBS NurbsSurface to a point-cloud (vertices) and an vertex-index list
         * by sampling the NURBS according to the resolution specified.
         *  \param[in] nurbs The openNURBS surface.
         *  \param[out] cloud The actual vertices (point-cloud).
         *  \param[out] vertices The vertex-indices for a polygon mesh.
         *  \param[in] resolution mesh resolution (number of vertices along each of the two dimensions of the surface. */
        static void
        convertSurface2Vertices (const ON_NurbsSurface &nurbs, pcl::PointCloud<pcl::PointXYZ>::Ptr cloud,
                                 std::vector<pcl::Vertices> &vertices, unsigned resolution);

        /** \brief Converts an openNURBS NurbsCurve to a sequence of points 'cloud',
         * by ELEMENT-WISE sampling of the curve according to the resolution specified.
         *  \param[in] nurbs The openNURBS surface.
         *  \param[out] cloud The actual vertices (point-cloud).
         *  \param[in] resolution number of sampling points within one NurbsCurve element. */
        static void
        convertCurve2PointCloud (const ON_NurbsCurve &nurbs, pcl::PointCloud<pcl::PointXYZRGB>::Ptr cloud,
                                 unsigned resolution);

        /** \brief Converts an openNURBS NurbsCurve, defined on an NurbsSurface to a sequence of points 'cloud',
         * by ELEMENT-WISE sampling of the curve according to the resolution specified.
         *  \param[in] nurbs The openNURBS surface.
         *  \param[out] cloud The actual vertices (point-cloud).
         *  \param[in] resolution number of sampling points within one NurbsCurve element. */
        static void
        convertCurve2PointCloud (const ON_NurbsCurve &curve, const ON_NurbsSurface &surf,
                                 pcl::PointCloud<pcl::PointXYZRGB>::Ptr cloud, unsigned resolution);

    };
  }
}