Range Node Core — Manual

Range Node Core (RNC) is an addon for Range Game Engine that adds a blueprint node system to the engine. It lets you program your game object logic visually by connecting nodes, without writing Python code directly.

How it works

The addon compiles the node graph into Python code that runs as a KX_PythonComponent via exec(). Each node generates a code snippet; the compiler chains them in execution order.

Available categories

Category	Description
PLAYER	Movement, jump, inventory, weapons, health, FPS game systems
AI	Perception, state machines, movement, enemy combat
AI_BT	Behavior Tree — Selector, Sequence, Task, Decorator nodes
FPS	Classic FPS controller (all-in-one legacy)
PHYSICS	Forces, impulses, physics raycasts
RAYCAST	General raycast between arbitrary points
EVENT	OnStart, OnUpdate, OnCollision, OnPropertyChange
FLOW	Branch, Gate, Delay, Timer
LOGIC	AND, OR, NOT, Compare
MATH	Arithmetic and trigonometric operations
OBJECT	Transforms, BGE properties
ANIMATION	Play Action, Stop Action
AUDIO	Play Sound, Stop Sound
CAMERA	Follow, FOV
FSM	Finite State Machine
SAVE	Data save system
VEHICLE	BGE vehicle control
DIALOGUE	Dialogue system
UI	On-screen text
DEBUG	Print, Log

Compiler conventions

• Exec nodes have In and Out sockets and are chained sequentially.
• Branch nodes have two exec outputs (True/False or custom names) and generate an if/else block.
• Data nodes are pure Python expressions; they have no exec sockets.
• Data is shared between nodes on the same object via instance variables (self._prefix_*).