Functions

Blueprint Functions Basics

• Events can call functions

• Functions are lists of instructions for the game to run

  • Can create custom or use existing functions
    • Line trace by channel is an example (has ‘f’ in corner)
    • Takes input parameters, processes them, outputs results

• Creating Custom Functions

• Located in My Blueprint section > Functions list > plus button

• Function Data Panel shows:

  • Inputs (parameters on left side)

    Can set variables like integers

  • Outputs (results on right side)
  • Processing happens between input/output

• Function Connections

• Pins can only connect to matching types

  • Integer pins connect to integer pins

• Can call functions by:

  • Right clicking and searching
  • Dragging from function list

• Begin play event triggers at game start

• Important Function Rules

• Functions must execute completely in same call

  • Cannot use latent functions (clock icon)
  • No delay nodes allowed

• Can be called from other actors with reference

• Conversions happen automatically between some types

  • Example: Integer to string for print string

Functions form the basic building blocks for game logic, taking inputs and producing outputs through a series of instructions. They must complete execution immediately and can be referenced across different actors in the game.