[for UE 4.25.3]
UE4调用dll的方法和标准的c及c++相同,核心代码如下:
//包含dll的头文件
#include "C:/Users/Documents/Unreal Projects/MyProject01/MyPlugins/IGaussDiffusion.h"
#include "C:/Users/Documents/Unreal Projects/MyProject01/MyPlugins/IFactor.h"
//定义dll里的函数指针
typedef void (* destroyGaussDiffusion)(IGaussDiffusion* );
typedef void (*destroyFactors)(IFactor*);
//调用dll的代码段
FString filePath = FPaths::Combine(*FPaths::EnginePluginsDir(), TEXT("FangHua/"),
TEXT("GaussDiffusionDLL.dll")); // Concatenate the plugins folder and the DLL file.
if (FPaths::FileExists(filePath)) {
void* DLLHandle;
DLLHandle = FPlatformProcess::GetDllHandle(*filePath); // Retrieve the DLL.
if (DLLHandle != NULL) {
//释放高斯
destroyGaussDiffusion DLLdestroyGaussDiffusion = NULL; // Local DLL function pointer.
FString procName = "freeGaussDiffusion"; // The exact name of the DLL function.
DLLdestroyGaussDiffusion = (destroyGaussDiffusion)FPlatformProcess::GetDllExport(DLLHandle, *procName); // Export the DLL function.
if (DLLdestroyGaussDiffusion != NULL) {
DLLdestroyGaussDiffusion(gaussDiffusion);// Call the DLL function, with arguments corresponding to the signature and return type of the function.
}
//释放米氏理论
destroyFactors DLLdestroyFactors = NULL; // Local DLL function pointer.
FString procName1 = "freeFactors"; // The exact name of the DLL function.
DLLdestroyFactors = (destroyFactors)FPlatformProcess::GetDllExport(DLLHandle, *procName1); // Export the DLL function.
if (DLLdestroyFactors != NULL) {
DLLdestroyFactors(factor);// Call the DLL function, with arguments corresponding to the signature and return type of the function.
}
}
}