EyeData v1 vs v2

[nbhatia 3]

Hi,

While using SRAnipal SDK, I see that the eye data structure is declared as two versions: v1 and v2. It would be great of somebody can provide more detail about applicability of two versions. 

E.g.
ViveSR::anipal::Eye::EyeData
ViveSR::anipal::Eye::EyeData_v2

Many Thanks,
Nitesh

@Corvus @Daniel_Y

[Daniel_Y 17]

To compare EyeData and EyeData_v2 you could see an extra member, expression_data, which represents more facial expression blendshapes

[nbhatia 3]

I see. Thank you. Is this the only difference between v1 and v2? I was wondering if there would be any difference in terms of efficiency, precision and sampling rate. 
Many Thanks,

Nitesh

[Daniel_Y 17]

No if you only need eye gaze information.

[nbhatia 3]

Ok. That clears a lot of confusion. Thank you @Daniel_Y🙂

[cte 1]

@nbhatia how are you going about getting the data from the SDK? I'm new to this and trying to figure out how to pull that data into a writable export file of some kind (ideally a CSV).

[nbhatia 3]

3 minutes ago, cte said:

@nbhatia how are you going about getting the data from the SDK? I'm new to this and trying to figure out how to pull that data into a writable export file of some kind (ideally a CSV).

Hi, have you checked the sdk? There are dome examples already. 

[cte 1]

2 minutes ago, nbhatia said:

Hi, have you checked the sdk? There are dome examples already. 

Trying to work trough it now. I see the different levels in Unreal but don't know where to start with the data extraction. I examined the dartboard actor but am unsure how to use what I'm looking at here (DartBoard.h)

---------------------------------

Do I need to modify this code so as to utilize it as a kind of template?

- If so, where do I modify and what structure do I use?

// ========= Copyright 2019, HTC Corporation. All rights reserved. ===========

#pragma once

#include "SRanipal_FunctionLibrary_Eye.h"
#include "SRanipal_Eye.h"

#include "Engine/Classes/Camera/PlayerCameraManager.h"
#include "Runtime/Engine/Classes/Materials/Material.h"
#include "CoreMinimal.h"
#include "GameFramework/Actor.h"
#include "DartBoard.generated.h"

UCLASS()
class SRANIPAL_API ADartBoard : public AActor
{
	GENERATED_BODY()
	
public:	
	// Sets default values for this actor's properties
	ADartBoard();


	UPROPERTY(EditAnywhere)
		FVector Position;	// The dartboard's position
	UPROPERTY(EditAnywhere)
		UStaticMeshComponent* BoardMesh;
	UPROPERTY(EditAnywhere)
		UMaterial* ParentMaterial;

	UPROPERTY()
		APlayerCameraManager* PlayerCameraRef;

private:
	FVector FocusPosition;
	UMaterialInstanceDynamic* DartBoardMaterial;

protected:
	// Called when the game starts or when spawned
	virtual void BeginPlay() override;

public:
	// Called every frames
	virtual void Tick(float DeltaTime) override;

private:
	// Focus relative parameter
	FFocusInfo FocusInfo;
	FVector GazeOrigin, GazeDirection;
	float RayLength = 1000.0f;
	float RayRadius = 1.0f;

	// Move dart board
	FVector InitialPosition;
	bool FirstUpdate = true;
	bool AlreadyMoveDart = false;
	void MoveDartBoard();
	float  SignedAngle(FVector v1, FVector v2, FVector v_forward);
};

Sorry if this is a basic question but I'm brand new to C++ 👶

 

[nbhatia 3]

10 minutes ago, cte said:

Trying to work trough it now. I see the different levels in Unreal but don't know where to start with the data extraction. I examined the dartboard actor but am unsure how to use what I'm looking at here (DartBoard.h)

---------------------------------

Do I need to modify this code so as to utilize it as a kind of template?

- If so, where do I modify and what structure do I use?

// ========= Copyright 2019, HTC Corporation. All rights reserved. ===========

#pragma once

#include "SRanipal_FunctionLibrary_Eye.h"
#include "SRanipal_Eye.h"

#include "Engine/Classes/Camera/PlayerCameraManager.h"
#include "Runtime/Engine/Classes/Materials/Material.h"
#include "CoreMinimal.h"
#include "GameFramework/Actor.h"
#include "DartBoard.generated.h"

UCLASS()
class SRANIPAL_API ADartBoard : public AActor
{
	GENERATED_BODY()
	
public:	
	// Sets default values for this actor's properties
	ADartBoard();


	UPROPERTY(EditAnywhere)
		FVector Position;	// The dartboard's position
	UPROPERTY(EditAnywhere)
		UStaticMeshComponent* BoardMesh;
	UPROPERTY(EditAnywhere)
		UMaterial* ParentMaterial;

	UPROPERTY()
		APlayerCameraManager* PlayerCameraRef;

private:
	FVector FocusPosition;
	UMaterialInstanceDynamic* DartBoardMaterial;

protected:
	// Called when the game starts or when spawned
	virtual void BeginPlay() override;

public:
	// Called every frames
	virtual void Tick(float DeltaTime) override;

private:
	// Focus relative parameter
	FFocusInfo FocusInfo;
	FVector GazeOrigin, GazeDirection;
	float RayLength = 1000.0f;
	float RayRadius = 1.0f;

	// Move dart board
	FVector InitialPosition;
	bool FirstUpdate = true;
	bool AlreadyMoveDart = false;
	void MoveDartBoard();
	float  SignedAngle(FVector v1, FVector v2, FVector v_forward);
};

Sorry if this is a basic question but I'm brand new to C++ 👶

 

Hi,

I am away from my PC atm. But I remember examples written in C were easiest to understand the API. One example had a file writer if I remember correctly.

Also check some older posts in this forum. There is one post for unity in C# where data is handled in a separate thread. Else, consider writing a new post. People in this forum is very good.

[jboss 1]

One think I noticed now that I'm using version 2 is that measured values for origin are in mm, so to use it in Unity I need to divide by 1000. In version 1 this was not necessary, I could use the origin values right away.