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#ifndef  types_INC
#define  types_INC

#include <cv.h>
#include <Eigen/Dense>
#include <exception>
#define MAXLINE 8192
#define MAXFILENAME 1024
#define STATESIZE 9            /* Set to 13 for quaternion estimation, or 9 for quaternion as input  */
#define INLIER_THRESHOLD 12.
#define PATCHSIZE 51            /* must be odd */
using Eigen::Matrix;
using Eigen::Matrix3d;
using Eigen::Quaterniond;
using Eigen::Vector2d;
using Eigen::Vector3d;
using Eigen::Vector4d;

// A struct for storing measurements.
typedef enum {REFLECTION,MONO,HEIGHT} measurement_type;
typedef struct {
    measurement_type z_type;
    int id;
    Vector3d source, reflection;
    double height;
    Vector2d Ssrc, Sref;
    cv::Mat patch, refpatch;
    double xcorrmax;
} measurement_t;

// A struct for storing PVA covariance.
typedef struct {
    Matrix3d position,velocity,attitude;
} covariance_t;

// A struct for storing x,y,z data.
typedef struct {
    double x,y,z;
} tuple;

// A struct for storing velocity in world frame
typedef struct {
    double east, north, up;
} velocity_t;

// A struct for storing attitude data.
typedef struct {
    double roll,pitch,yaw;
} attitude_t;

// A struct for storing UTM data.
typedef struct {
    double northing,easting,up;
    int zone_i;
    char zone_c;
} UTM;

// A struct for storing GPS data.
typedef struct {
    double latitude, longitude, altitude;
} gps;

// Message types
typedef enum {BESTUTM,IMG,INSCOVS,INSPVAS,RAWIMUS} message_type;

/*
 * The message struct is a general container for all message types. Not all
 * members are used for all messages, so care must be taken not to use garbage
 * values. 
 */
typedef struct {
    int secs,nsecs;
} timestamp;

typedef struct {
    // These should always be set.
    timestamp stamp;
    message_type msg_type;

    // Only the members needed by the msg_type are stored.
    tuple angular_velocity;
    attitude_t attitude;
    char image_names[2][MAXFILENAME];
    tuple linear_acceleration;
    gps position;
    UTM utm;
    velocity_t velocity;
    covariance_t covariance;
} message;
#endif   /* ----- #ifndef types_INC  ----- */