Visual

Visual programming or visual scripting is a way to program things with visual nodes. By placing nodes and linking them one can make the program perform the desired action. It is useful for level designers and mission scripters that do not feel like learning all the details of a programming language.

Nodes

Connections

Graph

Reference

Tools for the Job, Part 1: The Nodegraph System - 2016

Unreal: Blueprints Visual Scripting

Stingray: Visual programming using Flow

Lumberyard - Flow Graph System

Codeless Visual Scripting Powered Game Engines - 2010