When I try to create a Geometry Collection component in C++, I keep receiving these errors.
InteractionTrigger.h
I added the include header: #include "GeometryCollection/GeometryCollectionComponent.h"
and a UPROPERTY()
My InteractionTrigger.cpp file
Any help is appreciated thanks!
Hi! Just add module “GeometryCollectionEngine”, it will fix it, mark this as answer
I would also like to add that, you need to add this module to your projects Build.cs:
Source/ProjectName/ProjectName.Build.cs
And in there you can add it like this:
PublicDependencyModuleNames.AddRange(new string[] { "Core",
"CoreUObject", "Engine", "InputCore", "EnhancedInput",
"HairStrandsCore", "AIModule", "NavigationSystem",
"GeometryCollectionEngine" });
Note: Ignore all modules that are not needed for you.
Also, as a general rule of thumb, I would recommend using forward declarations in your header files. By doing so, you don’t have to include a lot of headers, which can otherwise cause a significant increase in dependencies, leading to slower build times and potential circular dependencies. Forward declarations help to keep the compilation units more independent, ultimately resulting in a more efficient build process.
Here is a simplified way to use forward declaration:
// MyClass.h
#ifndef MYCLASS_H
#define MYCLASS_H
// Forward declaration of the `OtherClass` class
class OtherClass;
class MyClass {
public:
MyClass();
void doSomething();
private:
OtherClass* otherClassInstance; // Pointer to OtherClass
};
#endif // MYCLASS_H
// MyClass.cpp
#include "MyClass.h"
#include "OtherClass.h" // Include the full definition of OtherClass here
MyClass::MyClass() : otherClassInstance(nullptr) {}
void MyClass::doSomething() {
// Now we have access to OtherClass' methods through the pointer
if (otherClassInstance) {
// Perform operations using otherClassInstance
}
}