Re-order Array ?

Development Programming & Scripting Blueprint
1

After looking there doesn’t seem to be a sort node. In short, getting an array of actors and then order them by their distance from a main actor in the array from least to most. What I’m wanting to know is if there is a way to move array items down in the array ?

2

Are you storing the distance anywhere, is it a variable in each actor?

3

Haven’t decided.

4

I have something like that, cant check is that works now, but as far as i remember from weakest to strongest is a lot harder(more code) to do than from strongest to weakest.

Blue variable is a Spell Effect Actor and Green is Float which describe how powerfull this effect.
also i used custom macro which you would need to copy or make a gate system to mimic it functionality.

5

I can’t actually read it.

6

too bad, you know what that means - sit and think about how to resolve your problem.

7

I can see what all of the nodes are just fine.

8

So if I’m not mistaken using Insert will do the job.

9

It’s actually very easy to expose TArray::Sort() to blueprints, you could do it like this:

In the header, ArrayFunctions.h



#pragma once

#include "Kismet/BlueprintFunctionLibrary.h"
#include "ArrayFunctions.generated.h"

UCLASS()
class PROJECTNAME_API UArrayFunctions : public UBlueprintFunctionLibrary //replace with your project name in uppercase  and _API
{
	GENERATED_BODY()
	
public:

	UFUNCTION(BlueprintCallable, meta = (DisplayName = "Sort Array", Keywords = "Sort float array"), Category = Game)
		static void fSortArray(UPARAM(ref) TArray<float>& TargetArray);
};

.cpp:



#include "ProjectName.h"
#include "ArrayFunctions.h"
#include "Array.h"


void UArrayFunctions::fSortArray(UPARAM(ref) TArray<float>& TargetArray)
{
	TargetArray.Sort();
}

After that, you could sort them by doing something like the below, provided they have their distances saved as variables:

This will sort the actor array, so that the one with the shortest distance is at 0.

10

Thanks, I think I get the idea.

11

hi fellas!
this is another way to do it.
I will sort the floats of an array (in my exemple it is called “displayed stars distance to origin”) from minimum to maximum.
I created the variable “the following minor value” to handle the iteration process:

  • first loop: i check every array element
  • second loop: I find the minimum value of the remaining array elements and I store it. then i swap it with the loop index element.
    Finally those distances are linked to an array of actors (“stars”) that I swap , reordering they too at the same time.

keep it up :slight_smile: