C++ get Mesh size

Development Programming & Scripting
1

Hello, I just started working with UE and i created a
My_Mesh = CreateDefaultSubobject(TEXT(“MyMesh”));
Is there a way i can get the size of mesh ? i need to get x,y,z to subdivide the map into squares, triangles and hexagones to create my own custom navigation mesh.

I found out about these
“GetComponentBounds” for components
“GetActorBounds” for Actors.
And i dont understand how to use them.

2

What about My_Mesh->CalcBounds()? Basically the same as GetComponentBounds but in C++.

3

it returns an FTransform, where can i get the size?
Or it returns an FBoxSphereBounds… that i checked and its x,y,z are null

4

Have you tried calling My_Mesh->UpdateBounds() before? Also, are My_Mesh->CalcBounds().BoxExtent and My_Mesh->CalcBounds().SphereRadius both zero?

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5

FTransform transform ;
FVector vector = My_Mesh->CalcBounds(transform ).GetBox().GetSize();
this returns negative values. I am not sure if this is the correct way of getting the size. Also what is the transform needed for, is it the a transform that will get a value when i call calcBounds, or is the function CalcBonds calculating the bounds of the transform ?

SphereRadius returned 536870912
and BoxExtent returned negative values

6

When you call UStaticMeshComponent::CalcBounds(FTransform& LocalToWorld), first the bounds of the mesh are fetched, and then they are transformed by the LocalToWorld transform. So when you have a transform with a location and a rotation, the bounds are translated and rotated.

Also notice that the mesh of the UStaticMeshComponent must be set first.

7

Thank you all for your help.
My_Mesh->CalcBounds().BoxExtent
Was the solution to get the distance.

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