Need help translating a header file for UE4 use

BlackFangTech · March 24, 2014, 3:21am

The original was this


typedef struct _sixenseControllerData {
  float pos[3];
  float rot_mat[3][3];
  float joystick_x;
  float joystick_y;
  float trigger;
  unsigned int buttons;
  unsigned char sequence_number;
  float rot_quat[4];
  unsigned short firmware_revision;
  unsigned short hardware_revision;
  unsigned short packet_type;
  unsigned short magnetic_frequency;
  int enabled;
  int controller_index;
  unsigned char is_docked;
  unsigned char which_hand;
  unsigned char hemi_tracking_enabled;
} sixenseControllerData;

I changed it to this


USTRUCT()
struct _sixenseControllerData
{

	GENERATED_USTRUCT_BODY()

	UPROPERTY()
	float pos[3];
	
	UPROPERTY()
	float rot_mat[3][3];
	
	UPROPERTY()
	float joystick_x;
	
	UPROPERTY()
	float joystick_y;
	
	UPROPERTY()
	float trigger;
	
	UPROPERTY()
	unsigned int buttons;
	
	UPROPERTY()
	unsigned char sequence_number;
	
	UPROPERTY()
	float rot_quat[4];
	
	UPROPERTY()
	unsigned short firmware_revision;
	
	UPROPERTY()
	unsigned short hardware_revision;
	
	UPROPERTY()
	unsigned short packet_type;
	
	UPROPERTY()
	unsigned short magnetic_frequency;
	
	UPROPERTY()
	int enabled;
	
	UPROPERTY()
	int controller_index;
	
	UPROPERTY()
	unsigned char is_docked;
	
	UPROPERTY()
	unsigned char which_hand;
	
	UPROPERTY()
	unsigned char hemi_tracking_enabled;
	
} sixenseControllerData;

However, I get “error C2144: syntax error : ‘float’ should be preceded by ‘;’” and “error C4430: missing type specifier - int assumed. Note: C++ does not support default-int” on my first variable in the struct as well as similar errors throughout. I suspect it has to do with pos being a set of three floats rather than a single float, but I may be completely wrong. Any help is much appreciated.

Rama · March 24, 2014, 3:43am

First you define your USTRUCT, above your class definition (or in a static library)



USTRUCT()
struct FSixenseControllerData
{

	GENERATED_USTRUCT_BODY()

	UPROPERTY()
	float pos[3];
	
	UPROPERTY()
	float rot_mat[3][3];
	
	UPROPERTY()
	float joystick_x;
	
	UPROPERTY()
	float joystick_y;
	
	UPROPERTY()
	float trigger;
	
	UPROPERTY()
	unsigned int buttons;
	
	UPROPERTY()
	unsigned char sequence_number;
	
	UPROPERTY()
	float rot_quat[4];
	
	UPROPERTY()
	unsigned short firmware_revision;
	
	UPROPERTY()
	unsigned short hardware_revision;
	
	UPROPERTY()
	unsigned short packet_type;
	
	UPROPERTY()
	unsigned short magnetic_frequency;
	
	UPROPERTY()
	int enabled;
	
	UPROPERTY()
	int controller_index;
	
	UPROPERTY()
	unsigned char is_docked;
	
	UPROPERTY()
	unsigned char which_hand;
	
	UPROPERTY()
	unsigned char hemi_tracking_enabled;
 
        //You must include constructor
       FSixenseControllerData()
       {
           //your default values
       }
	
};

Now it is an official variable type that you declare inside your class



UPROPERTY()
FSixenseControllerData MySixthSense;


F

all struct types must start with F

USTRUCT() tutorial

Here is my USTRUCT() tutorial!

USTRUCT TUTORIAL

BlackFangTech · March 24, 2014, 4:28am

Thanks, I forgot all about the prefixes. I’m still getting the “‘float’ should be preceded by ‘;’” and “error C4430: missing type specifier” though. I should probably post the whole header.
Original




#ifndef _SIXENSE_H_
#define _SIXENSE_H_

#if defined(WIN32)
  #ifdef SIXENSE_STATIC_LIB
    #define SIXENSE_EXPORT 
  #else
    #ifdef SIXENSE_BUILDING_DLL
      #define SIXENSE_EXPORT __declspec(dllexport)
    #else
      #define SIXENSE_EXPORT __declspec(dllimport)
    #endif
  #endif
#else
  #define SIXENSE_EXPORT 
#endif

#define SIXENSE_BUTTON_BUMPER   (0x01<<7)
#define SIXENSE_BUTTON_JOYSTICK (0x01<<8)
#define SIXENSE_BUTTON_1        (0x01<<5)
#define SIXENSE_BUTTON_2        (0x01<<6)
#define SIXENSE_BUTTON_3        (0x01<<3)
#define SIXENSE_BUTTON_4        (0x01<<4)
#define SIXENSE_BUTTON_START    (0x01<<0)

#define SIXENSE_SUCCESS 0
#define SIXENSE_FAILURE -1

#define SIXENSE_MAX_CONTROLLERS 4

typedef struct _sixenseControllerData {
  float pos[3];
  float rot_mat[3][3];
  float joystick_x;
  float joystick_y;
  float trigger;
  unsigned int buttons;
  unsigned char sequence_number;
  float rot_quat[4];
  unsigned short firmware_revision;
  unsigned short hardware_revision;
  unsigned short packet_type;
  unsigned short magnetic_frequency;
  int enabled;
  int controller_index;
  unsigned char is_docked;
  unsigned char which_hand;
  unsigned char hemi_tracking_enabled;
} sixenseControllerData;

typedef struct _sixenseAllControllerData {
  sixenseControllerData controllers[4];
} sixenseAllControllerData;

#if defined(__LANGUAGE_C_PLUS_PLUS)||defined(__cplusplus)||defined(c_plusplus)
extern "C" {
#endif

SIXENSE_EXPORT int sixenseInit( void );
SIXENSE_EXPORT int sixenseExit( void );

SIXENSE_EXPORT int sixenseGetMaxBases();
SIXENSE_EXPORT int sixenseSetActiveBase( int i );
SIXENSE_EXPORT int sixenseIsBaseConnected( int i );

SIXENSE_EXPORT int sixenseGetMaxControllers( void );
SIXENSE_EXPORT int sixenseIsControllerEnabled( int which );
SIXENSE_EXPORT int sixenseGetNumActiveControllers();

SIXENSE_EXPORT int sixenseGetHistorySize();

SIXENSE_EXPORT int sixenseGetData( int which, int index_back, sixenseControllerData * );
SIXENSE_EXPORT int sixenseGetAllData( int index_back, sixenseAllControllerData * );
SIXENSE_EXPORT int sixenseGetNewestData( int which, sixenseControllerData * );
SIXENSE_EXPORT int sixenseGetAllNewestData( sixenseAllControllerData * );

SIXENSE_EXPORT int sixenseSetHemisphereTrackingMode( int which_controller, int state );
SIXENSE_EXPORT int sixenseGetHemisphereTrackingMode( int which_controller, int *state );

SIXENSE_EXPORT int sixenseAutoEnableHemisphereTracking( int which_controller );

SIXENSE_EXPORT int sixenseSetHighPriorityBindingEnabled( int on_or_off );
SIXENSE_EXPORT int sixenseGetHighPriorityBindingEnabled( int *on_or_off );

SIXENSE_EXPORT int sixenseTriggerVibration( int controller_id, int duration_100ms, int pattern_id );

SIXENSE_EXPORT int sixenseSetFilterEnabled( int on_or_off );
SIXENSE_EXPORT int sixenseGetFilterEnabled( int *on_or_off );

SIXENSE_EXPORT int sixenseSetFilterParams( float near_range, float near_val, float far_range, float far_val );
SIXENSE_EXPORT int sixenseGetFilterParams( float *near_range, float *near_val, float *far_range, float *far_val );

SIXENSE_EXPORT int sixenseSetBaseColor( unsigned char red, unsigned char green, unsigned char blue );
SIXENSE_EXPORT int sixenseGetBaseColor( unsigned char *red, unsigned char *green, unsigned char *blue );

#if defined(__LANGUAGE_C_PLUS_PLUS)||defined(__cplusplus)||defined(c_plusplus)
}
#endif

#endif /* _SIXENSE_H_ */

Mine



#pragma once

#include "GameFramework/Actor.h"

#define _SIXENSE_H_

#define SIXENSE_EXPORT __declspec(dllimport)

#define SIXENSE_BUTTON_BUMPER   (0x01<<7)
#define SIXENSE_BUTTON_JOYSTICK (0x01<<8)
#define SIXENSE_BUTTON_1        (0x01<<5)
#define SIXENSE_BUTTON_2        (0x01<<6)
#define SIXENSE_BUTTON_3        (0x01<<3)
#define SIXENSE_BUTTON_4        (0x01<<4)
#define SIXENSE_BUTTON_START    (0x01<<0)

#define SIXENSE_SUCCESS 0
#define SIXENSE_FAILURE -1

#define SIXENSE_MAX_CONTROLLERS 4

USTRUCT()
struct FSixenseControllerData
{
	GENERATED_USTRUCT_BODY()

	float pos[3];
	
	float rot_mat[3][3];
	
	float joystick_x;
	
	float joystick_y;
	
	float trigger;
	
	unsigned int buttons;
	
	unsigned char sequence_number;
	
	float rot_quat[4];
	
	unsigned short firmware_revision;
	
	unsigned short hardware_revision;
	
	unsigned short packet_type;
	
	unsigned short magnetic_frequency;
	
	int enabled;
	
	int controller_index;
	
	unsigned char is_docked;
	
	unsigned char which_hand;
	
	unsigned char hemi_tracking_enabled;
 
    //You must include constructor
    FSixenseControllerData()
    {
		//your default values
    }
};

USTRUCT()
struct FSixenseAllControllerData
{
	GENERATED_USTRUCT_BODY()

	FSixenseControllerData controllers[4];
	
	//You must include constructor
    FSixenseAllControllerData()
    {
		//your default values
    }
		
};

UCLASS()
class ASixense : public AActor
{
	GENERATED_UCLASS_BODY();

	UPROPERTY()
	FSixenseControllerData MyControllerData;
	
	UPROPERTY()
	FSixenseAllControllerData MyAllControllerData;
	
	virtual void BeginPlay() OVERRIDE;

	SIXENSE_EXPORT int sixenseInit(void);
	SIXENSE_EXPORT int sixenseExit(void);

	SIXENSE_EXPORT int sixenseGetMaxBases();
	SIXENSE_EXPORT int sixenseSetActiveBase(int i);
	SIXENSE_EXPORT int sixenseIsBaseConnected(int i);

	SIXENSE_EXPORT int sixenseGetMaxControllers(void);
	SIXENSE_EXPORT int sixenseIsControllerEnabled(int which);
	SIXENSE_EXPORT int sixenseGetNumActiveControllers();

	SIXENSE_EXPORT int sixenseGetHistorySize();

	SIXENSE_EXPORT int sixenseGetData(int which, int index_back, FSixenseControllerData *);
	SIXENSE_EXPORT int sixenseGetAllData(int index_back, FSixenseAllControllerData *);
	SIXENSE_EXPORT int sixenseGetNewestData(int which, FSixenseControllerData *);
	SIXENSE_EXPORT int sixenseGetAllNewestData(FSixenseAllControllerData *);

	SIXENSE_EXPORT int sixenseSetHemisphereTrackingMode(int which_controller, int state);
	SIXENSE_EXPORT int sixenseGetHemisphereTrackingMode(int which_controller, int *state);

	SIXENSE_EXPORT int sixenseAutoEnableHemisphereTracking(int which_controller);

	SIXENSE_EXPORT int sixenseSetHighPriorityBindingEnabled(int on_or_off);
	SIXENSE_EXPORT int sixenseGetHighPriorityBindingEnabled(int *on_or_off);

	SIXENSE_EXPORT int sixenseTriggerVibration(int controller_id, int duration_100ms, int pattern_id);

	SIXENSE_EXPORT int sixenseSetFilterEnabled(int on_or_off);
	SIXENSE_EXPORT int sixenseGetFilterEnabled(int *on_or_off);

	SIXENSE_EXPORT int sixenseSetFilterParams(float near_range, float near_val, float far_range, float far_val);
	SIXENSE_EXPORT int sixenseGetFilterParams(float *near_range, float *near_val, float *far_range, float *far_val);

	SIXENSE_EXPORT int sixenseSetBaseColor(unsigned char red, unsigned char green, unsigned char blue);
	SIXENSE_EXPORT int sixenseGetBaseColor(unsigned char *red, unsigned char *green, unsigned char *blue);

};

It would seem that “GENERATED_…” lines are all red squiggly in visual studio. Removing them stops the requests for “;” but causes new errors, unsurprisingly…

gmpreussner · March 24, 2014, 6:01am

BlackRang666,

Can you post the entire new header file?

Also, not all basic C++ types are supported as UProperties. Use int8, int16, int32, uint8, uint16, uint32 etc. Search for “USTRUCT” in the code base for plenty of examples.

BlackFangTech · March 24, 2014, 3:12pm

Turns out it was because there was no .generated.h file. I was doing this entirely wrong anyway though. Looks like I should be dumping the sixense sdk into the ThirdParty folder…