小白求助，应该如何写出一个优雅的线程蓝图？

2021-04-02 03:53:21 1.3k 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

虚幻引擎蓝图网络开发：用VaRest插件优雅调用外部API实战在游戏开发与实时交互应用领域，网络通信是连接客户端与服务器、实现数据交换的核心技术。其基本原理是通过HTTP/HTTPS等协议，在蓝图可视化编程环境中发起请求与处理响应，完成如用户数据拉取、服务接口调用等功能。这项技术的核心价值在于将复杂的底层网络操作封装简化，极大提升了开发效率与代码可维护性，尤其适用于快速原型开发与游戏逻辑实现。其典型应用场景包括从游戏服务器获取排行榜、向AI服务提交分析请求、集成第三方天气或支付接口等。本文聚焦于解决虚幻引擎蓝图中处理JSON解析与HTTP请求时的繁琐与易错问题，通过引阅读详情

说明：某码农在写UE4蓝图的过程中发生了一件神奇的事，在接受了一坨端口传输的数据之后，竟然悲催地不能编译！！！
代码如下（省略串口调用）：
h:

UCLASS()

class MYPJT_API UmainBP : public UBlueprintFunctionLibrary

{

	GENERATED_BODY()

		UFUNCTION(BlueprintCallable, BlueprintPure, Category = Game)

		static FString BodyTurn

		(

			FString& LX_uparm,

			FString& LY_uparm,

			FString& LZ_uparm,

			FString& LZ_lowarm,

			FString& LX_hand,

			FString& LY_hand,

			FString& RX_uparm,

			FString& RY_uparm,

			FString& RZ_uparm,

			FString& RZ_lowarm,

			FString& RX_hand,

			FString& RY_hand

			);

};

cpp:

String UmainBP::BodyTurn(

    FString& LX_uparm,

    FString& LY_uparm,

    FString& LZ_uparm,

    FString& LZ_lowarm,

    FString& LX_hand,

    FString& LY_hand,

    FString& RX_uparm,

    FString& RY_uparm,

    FString& RZ_uparm,

    FString& RZ_lowarm,

    FString& RX_hand,

    FString& RY_hand

)

 

{

    int32_t wTempList[20] = { 0 }, i = 0;

    HANDLE hCom1 = init_com("COM3");

    char readBuf[1000] = { 0 }, bufTemp1[1024] = { 0 }, bufTemp2[1024] = { 0 };

    DWORD readsize;

    int n = 2;

    string str = "";

    int index = 0;

    while (n--) {

        ReadFile(hCom1, readBuf, 256, &readsize, NULL);

        str += readBuf;

        memset(readBuf, 0, sizeof(readBuf));

        index = str.find('\n');

        if (index < 0) {}

        else if (index == 113)

        {

            string p = str.substr(0, index + 1);



            if (p[0] == ':' && p[113] == '\n')

            {

                for (i = 0; i < 14; i++)

                {

                    wTempList[i] = strtoul(p.substr(i * 8 + 1, 8).c_str(), NULL, 16);

                }

                uint32_t crcData = wTempList[13];

                uint32_t crcRes = crc32_in_c(0, (uint8_t*)wTempList, 52);



            }

            index = 0;

            float lz_uparm = 180*wTempList[1]/32768;

            float ly_uparm = 180*wTempList[2]/32768;

            float lx_uparm = 180*wTempList[3]/32768;

            float lz_lowarm = 180*wTempList[4]/32768;

            float lx_hand = 180*wTempList[5]/32768;

            float ly_hand = 180*wTempList[6]/32768;

            float rz_uparm = 180*wTempList[7]/32768;

            float ry_uparm = 180*wTempList[8]/32768;

            float rx_uparm = 180*wTempList[9]/32768;

            float rz_lowarm = 180*wTempList[10]/32768;

            float rx_hand = 180*wTempList[11]/32768;

            float ry_hand = 180*wTempList[12]/32768;

            LZ_uparm = FString::SanitizeFloat(lz_uparm); 

            LY_uparm = FString::SanitizeFloat(ly_uparm);

            LX_uparm = FString::SanitizeFloat(lx_uparm);

            LZ_lowarm = FString::SanitizeFloat(lz_lowarm);

            LX_hand = FString::SanitizeFloat(lx_hand);

            LY_hand = FString::SanitizeFloat(ly_hand);

            RZ_uparm = FString::SanitizeFloat(rz_uparm);

            RY_uparm = FString::SanitizeFloat(ry_uparm);

            RX_uparm = FString::SanitizeFloat(rx_uparm);

            RZ_lowarm = FString::SanitizeFloat(rz_lowarm);

            RX_hand = FString::SanitizeFloat(rx_hand);

            RY_hand = FString::SanitizeFloat(ry_hand);

          

        }

        else

        {

            str.erase(0, index + 1);

            LZ_uparm = "0";

            LY_uparm = "0";

            LX_uparm = "0";

            LZ_lowarm = "0";

            LX_hand = "0";

            LY_hand = "0";

            RZ_uparm = "0";

            RY_uparm = "0";

            RX_uparm = "0";

            RZ_lowarm = "0";

            RX_hand = "0";

            RY_hand = "0";



        }

    }

    return "0";

}