opencv/modules/viz/include/opencv2/viz.hpp

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#ifndef __OPENCV_VIZ_HPP__
#define __OPENCV_VIZ_HPP__

#include <opencv2/viz/types.hpp>
#include <opencv2/viz/widgets.hpp>
#include <opencv2/viz/viz3d.hpp>

namespace cv
{
    namespace viz
    {
        //! takes coordiante frame data and builds transfrom to global coordinate frame
        CV_EXPORTS Affine3d makeTransformToGlobal(const Vec3d& axis_x, const Vec3d& axis_y, const Vec3d& axis_z, const Vec3d& origin = Vec3d::all(0));

        //! constructs camera pose from position, focal_point and up_vector (see gluLookAt() for more infromation)
        CV_EXPORTS Affine3d makeCameraPose(const Vec3d& position, const Vec3d& focal_point, const Vec3d& y_dir);

        //! retrieves a window by its name. If no window with such name, then it creates new.
        CV_EXPORTS Viz3d getWindowByName(const String &window_name);

        //! Unregisters all Viz windows from internal database. After it 'getWindowByName()' will create new windows instead getting existing from the database.
        CV_EXPORTS void unregisterAllWindows();

        //! checks float value for Nan
        inline bool isNan(float x)
        {
            unsigned int *u = reinterpret_cast<unsigned int *>(&x);
            return ((u[0] & 0x7f800000) == 0x7f800000) && (u[0] & 0x007fffff);
        }

        //! checks double value for Nan
        inline bool isNan(double x)
        {
            unsigned int *u = reinterpret_cast<unsigned int *>(&x);
            return (u[1] & 0x7ff00000) == 0x7ff00000 && (u[0] != 0 || (u[1] & 0x000fffff) != 0);
        }

        //! checks vectors for Nans
        template<typename _Tp, int cn> inline bool isNan(const Vec<_Tp, cn>& v)
        { return isNan(v.val[0]) || isNan(v.val[1]) || isNan(v.val[2]); }

        //! checks point for Nans
        template<typename _Tp> inline bool isNan(const Point3_<_Tp>& p)
        { return isNan(p.x) || isNan(p.y) || isNan(p.z); }


        ///////////////////////////////////////////////////////////////////////////////////////////////
        /// Read/write clouds. Supported formats: ply, xyz, obj and stl (readonly)

        CV_EXPORTS void writeCloud(const String& file, InputArray cloud, InputArray colors = noArray(), InputArray normals = noArray(), bool binary = false);
        CV_EXPORTS Mat  readCloud (const String& file, OutputArray colors = noArray(), OutputArray normals = noArray());

        ///////////////////////////////////////////////////////////////////////////////////////////////
        /// Read/write poses and trajectories

        CV_EXPORTS bool readPose(const String& file, Affine3d& pose, const String& tag = "pose");
        CV_EXPORTS void writePose(const String& file, const Affine3d& pose, const String& tag = "pose");

        //! takes vector<Affine3<T>> with T = float/dobule and writes to a sequence of files with given filename format
        CV_EXPORTS void writeTrajectory(InputArray traj, const String& files_format = "pose%05d.xml", int start = 0, const String& tag = "pose");

        //! takes vector<Affine3<T>> with T = float/dobule and loads poses from sequence of files
        CV_EXPORTS void readTrajectory(OutputArray traj, const String& files_format = "pose%05d.xml", int start = 0, int end = INT_MAX, const String& tag = "pose");


        ///////////////////////////////////////////////////////////////////////////////////////////////
        /// Computing normals for mesh

        CV_EXPORTS void computeNormals(const Mesh& mesh, OutputArray normals);

    } /* namespace viz */
} /* namespace cv */

#endif /* __OPENCV_VIZ_HPP__ */