创建您的第一个相机应用

这个快速入门将帮助你快速使用Orbbec SDK，构建你的第一个相机应用程序需要用到以下函数：

queryDeviceList()

deviceCount()

getDevice()

getDeviceInfo()

firmwareVersion()

serialNumber()

connectionType()

getSensorList()

getSensor()

先决条件

连接Orbbec设备。
下载并安装Orbbec SDK。

头文件

包含Orbbec SDK的主要头文件

```cpp
#include <iostream>
#include "utils.hpp"
#include "libobsensor/ObSensor.hpp"
#include "libobsensor/hpp/Error.hpp"
```

查找Orbbec设备

首先，我们需要检查您的计算机连接了多少个Orbbec设备。使用函数来检索连接的设备。

// Create a Context.
ob::Context ctx;

// Query the list of connected devices
auto devList = ctx.queryDeviceList();
if (devList->deviceCount() == 0) {
std::cerr << "Device not found!" << std::endl;
return -1;
}

如果检测到设备，您可以继续访问其信息和传感器。

访问设备信息

获取设备列表后，打开第一个设备并检索一些基本信息，比如设备名称和固件版本。

auto dev = devList->getDevice(0);
auto devInfo = dev->getDeviceInfo();
std::cout << "Device name: " << devInfo->name() << std::endl;
std::cout << "Firmware version: " << devInfo->firmwareVersion() << std::endl;

// By getting the serial number of the device
auto sn = devInfo->serialNumber();
std::cout << "Serial number: " << sn << std::endl;

// By getting the connection type of the device
auto connectType = devInfo->connectionType();
std::cout << "ConnectionType: " << connectType << std::endl;

列出传感器

接下来，通过获取传感器列表并打印每个传感器类型。

   // Get the list of supported sensors
    std::cout << "Sensor types: " << std::endl;
    auto sensorList = dev->getSensorList();
    for(uint32_t i = 0; i < sensorList->count(); i++) {
        auto sensor = sensorList->getSensor(i);
        switch(sensor->type()) {
        case OB_SENSOR_COLOR:
            std::cout << "\tColor sensor" << std::endl;
            break;
        case OB_SENSOR_DEPTH:
            std::cout << "\tDepth sensor" << std::endl;
            break;
        case OB_SENSOR_IR:
            std::cout << "\tIR sensor" << std::endl;
            break;
        case OB_SENSOR_IR_LEFT:
            std::cout << "\tIR Left sensor" << std::endl;
            break;
        case OB_SENSOR_IR_RIGHT:
            std::cout << "\tIR Right sensor" << std::endl;
            break;
        case OB_SENSOR_GYRO:
            std::cout << "\tGyro sensor" << std::endl;
            break;
        case OB_SENSOR_ACCEL:
            std::cout << "\tAccel sensor" << std::endl;
            break;
        default:
            break;
        }
    }

错误处理

在你的应用程序中包含错误处理是很重要的。Orbbec SDK提供了详细的异常，可以捕获以了解在执行过程中发生了什么错误。

```cpp
catch(ob::Error &e) {
std::cerr << "Error: " << e.getMessage() << std::endl;
return -2;
}
```

完整代码

#include <iostream>
#include "utils.hpp"
#include "libobsensor/ObSensor.hpp"
#include "libobsensor/hpp/Error.hpp"

#define ESC 27

int main(int argc, char **argv) try {
    // Print the sdk version number, the sdk version number is divided into major version number, minor version number and revision number
    std::cout << "SDK version: " << ob::Version::getMajor() << "." << ob::Version::getMinor() << "." << ob::Version::getPatch() << std::endl;
    // Print sdk stage version
    std::cout << "SDK stage version: " << ob::Version::getStageVersion() << std::endl;

    // Create a Context.
    ob::Context ctx;

    // Query the list of connected devices
    auto devList = ctx.queryDeviceList();

    // Get the number of connected devices
    if(devList->deviceCount() == 0) {
        std::cerr << "Device not found!" << std::endl;
        return -1;
    }

    // Create a device, 0 means the index of the first device
    auto dev = devList->getDevice(0);

    // Get device information
    auto devInfo = dev->getDeviceInfo();

    // Get the name of the device
    std::cout << "Device name: " << devInfo->name() << std::endl;

    // Get the pid, vid, uid of the device
    std::cout << "Device pid: " << devInfo->pid() << " vid: " << devInfo->vid() << " uid: " << devInfo->uid() << std::endl;

    // By getting the firmware version number of the device
    auto fwVer = devInfo->firmwareVersion();
    std::cout << "Firmware version: " << fwVer << std::endl;

    // By getting the serial number of the device
    auto sn = devInfo->serialNumber();
    std::cout << "Serial number: " << sn << std::endl;

    // By getting the connection type of the device
    auto connectType = devInfo->connectionType();
    std::cout << "ConnectionType: " << connectType << std::endl;

    // Get the list of supported sensors
    std::cout << "Sensor types: " << std::endl;
    auto sensorList = dev->getSensorList();
    for(uint32_t i = 0; i < sensorList->count(); i++) {
        auto sensor = sensorList->getSensor(i);
        switch(sensor->type()) {
        case OB_SENSOR_COLOR:
            std::cout << "\tColor sensor" << std::endl;
            break;
        case OB_SENSOR_DEPTH:
            std::cout << "\tDepth sensor" << std::endl;
            break;
        case OB_SENSOR_IR:
            std::cout << "\tIR sensor" << std::endl;
            break;
        case OB_SENSOR_IR_LEFT:
            std::cout << "\tIR Left sensor" << std::endl;
            break;
        case OB_SENSOR_IR_RIGHT:
            std::cout << "\tIR Right sensor" << std::endl;
            break;
        case OB_SENSOR_GYRO:
            std::cout << "\tGyro sensor" << std::endl;
            break;
        case OB_SENSOR_ACCEL:
            std::cout << "\tAccel sensor" << std::endl;
            break;
        default:
            break;
        }
    }

    std::cout << "Press ESC to exit! " << std::endl;

    while(true) {

        // Get the value of the pressed key, if it is the esc key, exit the program
        int key = getch();
        if(key == ESC)
            break;
    }

    return 0;
}
catch(ob::Error &e) {
    std::cerr << "function:" << e.getName() << "\nargs:" << e.getArgs() << "\nmessage:" << e.getMessage() << "\ntype:" << e.getExceptionType() << std::endl;
    exit(EXIT_FAILURE);
}

下一步

-了解如何使用Orbbec SDK配置和使用单个传感器。

-探索Orbbec SDK文档中提供的高级功能和设置。