Some new Blueprint Macros (Updated StandardMacros)

Development Programming & Scripting Blueprint
1

Hello guys,

After working with UE4 editor, I’ve noticed the lack of some useful macros, and by macros I mean the standard ones like forloop, foreachloop … So, I’ve created a Macro library with :

  • ForLoopWithIncrement and ForLoopWithBreakAndIncrement (with “IncrementBy” integer)
  • ForLoopExclusive and ForLoopExclusiveWithBreak
  • ForLoopReverse and ForLoopReverseWithBreak (with “DecrementBy” integer)
  • ForLoopReverseExclusive and ForLoopReverseExclusiveWithBreak

The link

Cheers

2

Sorry i’m confused, the for and foreach are already part of the standard macro library along with many others.

3

Don’t be, I’ll try to explain with a simple example :

  • **ForLoop **and **ForLoopWithBreak **of UE4 => default forloop behavior, but incluvise, it increments each time the counter by 1 => for (int i = lowerValue, i <= higherValue, i++)
  • ForLoopWithIncrementand **ForLoopWithBreakAndIncrement ** of the CommonMacros library => inclusive too, you can increment by whichever integer value, you can get elements 2 by 2 or 3 by 3 and so on => for (int i = lowerValue, i <= higherValue, i += incrementBy)
  • ForLoopExclusiveand ForLoopExclusiveWithBreak of the CommonMacros library => this is the default forloop behavior for whomever used C-style languages and others as well, it increments by 1 and is exclusive => for (int i = lowerValue, i < higherValue, i ++)
  • ForLoopReverseand ForLoopReverseWithBreak of the CommonMacros library=> browse inversely, from a higher value to a lower value, a DecrementBy integer is added to customize the loop => for (int i = HigherValue, i >= lowerValue, i -= decrementBy)
  • ForLoopReverseExclusiveand ForLoopReverseExclusiveWithBreak of the CommonMacros library=> browse inversely, from a higher value to a lower value, a DecrementBy integer is added to customize the loop, and it is exclusive => for (int i = HigherValue, i > lowerValue, i -= decrementBy)

Again, the …Break macros introduce the same break behavior of the standard ForLoopWithBreak, ForEachLoopWithBreak, WhileLoop …

I hope I’ve clarified the “why I’ve added a CommomMacros library”.

Cheers

4

That’s clarified it thank you, I misinterpreted (or didn’t read correctly) the for loop with integer.

Nice work creating these!

5

Nice! Any chance these get added to the core UE4 build?

6

Thanks for these!!

how do I load them into my project?

7

Thanks! I’m sure I’ll have use of these at one point.

8

While these are nice macros, but I would oppose that part. These kind of macros, are actually much less used generally speaking, but I think adding them to the official macros, makes most of the newer users quite confused, it essentially causes more problems that would solve. Using them as a add on macro base, would be the best solution, which means only the users that feel confident enough will integrate and use them.

9

Hey guys,

Thanks for the comments!

@Just add this file to your project hierarchy (e.g. Create a new folder in your project then copy this file in it, it should be loaded automatically)

@I think those macros should have been within UE4 from the beginning, I find myself confused when I always had to get my array length and do a -1 before setting that to the forloop… Again, giving choices for exclusive/inclusive should have been a boolean, same thing for the IncrementBy and DecrementBy integer, they should have been added as parameters

10

Re: the array length - 1 thing, when you pull off of an array, there should also be an option called “Last Index” that effectively will do that for you as a convenience.