Tier 1
Series 8
8A: The Phantom Connection
"You don't pull a lever without checking if it's connected to the flaps. If you assume a connection exists when the wire is cut, you crash. In code, accessing empty variables is the most common cause of crashes."
The Concept: Null Reference Checks
A **NullReferenceException** happens when you try to use a variable that is empty (null). AI often assumes components exist perfectly. A Mechanic always checks before touching.
* **The Check:** `if (variable != null) { ... }`
* **The Why:** If `target` is null, asking for `target.position` crashes the game instantly.
* **The Check:** `if (variable != null) { ... }`
* **The Why:** If `target` is null, asking for `target.position` crashes the game instantly.
Red Flag Detected
The Audit: Flying Blind
Ask the AI to look at the target.
void Update() {
// FRAGILE CODE
// If target is destroyed, this line crashes the game.
transform.LookAt(target.position);
}
This is "Unsafe Access." The AI assumes "target" always exists. If the enemy dies (becomes null), the game freezes.
Elite Telemetry
Research shows "Elite" teams achieve 15% faster lead times by keeping AI on a "very tight leash."
- Small Batches Solving one problem at a time prevents logic drift.
- Modular Design Localizing the "blast radius" of AI changes.
- Tight Loops Rapid iteration with constant code review.
The Mechanic's Correction
Corrective Protocol
void Update() {
// AUDIT PASS: Safety Check installed.
if (target != null) {
transform.LookAt(target.position);
}
}
Your Pilot Command
> A skilled Mechanic directs the AI to check for null.