SurfaceTracker Class

Description

SurfaceTracker实现了对环境表面的跟踪。

SurfaceTracker占用1个camera的buffer。应使用camera的setBufferCapacity设置不少于所有组件占用的camera的buffer数量。参考 概览 。

创建之后，可以调用start/stop来开始和停止运行，start/stop是非常轻量的调用。

当不再需要该组件时，可以调用close对其进行关闭。close之后不应继续使用。

SurfaceTracker通过inputFrameSink输入 InputFrame ，应将 InputFrameSource 连接到inputFrameSink上进行使用。参考 概览 。

isAvailable

只在Android、iOS系统上且加速度计、陀螺仪可用时返回true。

C

bool easyar_SurfaceTracker_isAvailable(void)

C++

static bool isAvailable()

Java

public static boolean isAvailable()

Kotlin

companion object fun isAvailable(): Boolean

Objective-C

+ (bool)isAvailable

Swift

public static func isAvailable() -> Bool

C#

public static bool isAvailable()

inputFrameSink

InputFrame 输入端口。InputFrame要求必须拥有图像、时间戳和camera参数。

C

void easyar_SurfaceTracker_inputFrameSink(easyar_SurfaceTracker * This, easyar_InputFrameSink * * Return)

C++

std::shared_ptr<InputFrameSink> inputFrameSink()

Java

public @Nonnull InputFrameSink inputFrameSink()

Kotlin

fun inputFrameSink(): InputFrameSink

Objective-C

- (easyar_InputFrameSink *)inputFrameSink

Swift

public func inputFrameSink() -> InputFrameSink

C#

public virtual InputFrameSink inputFrameSink()

bufferRequirement

当前组件占用camera buffer的数量。

C

int easyar_SurfaceTracker_bufferRequirement(easyar_SurfaceTracker * This)

C++

int bufferRequirement()

Java

public int bufferRequirement()

Kotlin

fun bufferRequirement(): Int

Objective-C

- (int)bufferRequirement

Swift

public func bufferRequirement() -> Int32

C#

public virtual int bufferRequirement()

outputFrameSource

OutputFrame 输出端口。

C

void easyar_SurfaceTracker_outputFrameSource(easyar_SurfaceTracker * This, easyar_OutputFrameSource * * Return)

C++

std::shared_ptr<OutputFrameSource> outputFrameSource()

Java

public @Nonnull OutputFrameSource outputFrameSource()

Kotlin

fun outputFrameSource(): OutputFrameSource

Objective-C

- (easyar_OutputFrameSource *)outputFrameSource

Swift

public func outputFrameSource() -> OutputFrameSource

C#

public virtual OutputFrameSource outputFrameSource()

create

创建。

C

void easyar_SurfaceTracker_create(easyar_SurfaceTracker * * Return)

C++

static std::shared_ptr<SurfaceTracker> create()

Java

public static @Nonnull SurfaceTracker create()

Kotlin

companion object fun create(): SurfaceTracker

Objective-C

+ (easyar_SurfaceTracker *)create

Swift

public static func create() -> SurfaceTracker

C#

public static SurfaceTracker create()

start

开始跟踪算法。

C

bool easyar_SurfaceTracker_start(easyar_SurfaceTracker * This)

C++

bool start()

Java

public boolean start()

Kotlin

fun start(): Boolean

Objective-C

- (bool)start

Swift

public func start() -> Bool

C#

public virtual bool start()

stop

暂停跟踪算法。调用start来重新启动跟踪。

C

void easyar_SurfaceTracker_stop(easyar_SurfaceTracker * This)

C++

void stop()

Java

public void stop()

Kotlin

fun stop(): Unit

Objective-C

- (void)stop

Swift

public func stop() -> Void

C#

public virtual void stop()

close

关闭。close之后不应继续使用。

C

void easyar_SurfaceTracker_close(easyar_SurfaceTracker * This)

C++

void close()

Java

public void close()

Kotlin

fun close(): Unit

Objective-C

- (void)close

Swift

public func close() -> Void

C#

public virtual void close()

alignTargetToCameraImagePoint

将跟踪目标点对准到相机图像的指定点。图像坐标系（[0, 1]^2）的x朝右、y朝下，原点在左上角。可以使用 CameraParameters.imageCoordinatesFromScreenCoordinates 来从屏幕坐标转换为图像坐标。

C

void easyar_SurfaceTracker_alignTargetToCameraImagePoint(easyar_SurfaceTracker * This, easyar_Vec2F cameraImagePoint)

C++

void alignTargetToCameraImagePoint(Vec2F cameraImagePoint)

Java

public void alignTargetToCameraImagePoint(@Nonnull Vec2F cameraImagePoint)

Kotlin

fun alignTargetToCameraImagePoint(cameraImagePoint: Vec2F): Unit

Objective-C

- (void)alignTargetToCameraImagePoint:(easyar_Vec2F *)cameraImagePoint

Swift

public func alignTargetToCameraImagePoint(_ cameraImagePoint: Vec2F) -> Void

C#

public virtual void alignTargetToCameraImagePoint(Vec2F cameraImagePoint)