Problem with exporting nav mesh data.

[anonymous_user_eb506e951 (anonymous_user_eb506e95)]

@schauk

sorry to resurrect your old thread. I’m also trying to export my navmesh. i got the code working but somehow it exports a wrong mesh instead of the navmesh (the exported one looks like some sort of collision model?) i’m trying to get the playable space. (see pics)
edit: i use 4.18, in 4.20 navmesh c++ code is different (own module)
the code i use:

#include "Runtime/Engine/Public/Engine.h"
#include "Runtime/Engine/Classes/Engine/World.h"
#include "Runtime/Engine/Classes/AI/Navigation/RecastNavMesh.h"
#include "Runtime/Engine/Public/AI/Navigation/RecastNavMeshGenerator.h"
#include "GetNavmesh.h"
#include "AIController.h"

void AGetNavmesh::BeginPlay()
{
Super::BeginPlay();
FWorldContext Context = GEngine->GetWorldContexts().Last();
UWorld *World = Context.World();
UNavigationSystem* NavSys = World->GetNavigationSystem();
ANavigationData* NavData = NavSys->GetMainNavData(FNavigationSystem::ECreateIfEmpty::DontCreate);
ARecastNavMesh* NavMesh = Cast<ARecastNavMesh>(NavData);
NavMesh->GetGenerator()->ExportNavigationData(FString(TEXT("C:\\Users\\schau\\Testnavmesh.obj")));
UE_LOG(LogTemp, Warning, TEXT("NavMeshExported"));
}

I have defined one agent in the project settings.
also i can’t package the game when using this code, compiling works without probs

I also do the same thing。after studing the code

for (int32 Index = 0; Index < NavSys->NavDataSet.Num(); ++Index)
    {
        // feed data from octtree and mark for rebuild                
        TNavStatArray<float> CoordBuffer;
        TNavStatArray<int32> IndexBuffer;
        const ARecastNavMesh* NavData = Cast<const ARecastNavMesh>(NavSys->NavDataSet[Index]);
        if (NavData)

it look like some kind of data in UWORD, but i can’t figure out what’s mean of this
v 360.000000 125.000000 -279.999939
v 390.000000 125.000000 -479.999969
v 360.000000 125.000000 -479.999969
v 390.000000 125.000000 -479.999969
v 360.000000 125.000000 -279.999939
v 390.000000 125.000000 -279.999939
v 390.000000 144.999985 -480.000000
v 390.000000 125.000000 -279.999939
v 390.000000 144.999985 -279.999969
v 390.000000 125.000000 -279.999939
v 390.000000 144.999985 -480.000000
v 390.000000 125.000000 -479.999969
v 390.000000 144.999985 -480.000000
v 360.000000 125.000000 -479.999969
v 390.000000 125.000000 -479.999969
v 360.000000 125.000000 -479.999969
v 390.000000 144.999985 -480.000000
v 360.000000 144.999985 -480.000000
v 360.000000 125.000000 -279.999939
v 390.000000 144.999985 -279.999969
v 390.000000 125.000000 -279.999939
v 390.000000 144.999985 -279.999969
v 360.000000 125.000000 -279.999939
v 360.000000 144.999985 -279.999969
v 360.000000 144.999985 -480.000000
v 390.000000 144.999985 -279.999969
v 360.000000 144.999985 -279.999969
v 390.000000 144.999985 -279.999969
v 360.000000 144.999985 -480.000000
v 390.000000 144.999985 -480.000000
v 360.000000 144.999985 -279.999969
v 360.000000 164.999985 -480.000000
v 360.000000 144.999985 -480.000000
v 360.000000 144.999985 -279.999969
v 360.000000 125.000000 -279.999939
v 330.000000 125.000000 -279.999939
v 360.000000 144.999985 -279.999969