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0031-range-validation.md

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ADR 031: Range Validation

Status

Accepted

Context

Attacks currently do not validate range. With the Grid System in place, we can now enforce range restrictions.

Decision

We will add a Range property (in feet) to AttackAction and MonsterAttackAction. When executing an attack:

  1. If an IGridManager is available in the IActionContext:
    • Retrieve the positions of the source and target creatures.
    • Calculate the distance between them using the Grid's distance metric (Chebyshev).
    • If the distance exceeds the Range, the action fails.
  2. If no Grid is available, range validation is skipped (or assumed successful).

Consequences

  • Positive: Enforces spatial rules. Prevents melee attacks from across the map.
  • Negative: Requires updating action constructors. Requires Grid for validation (fallback is lenient).