effect · `clamp_temp_variable`

Definition

Supported scope:any
Supported target:none

Description

Clamps a temp variable a variable bet ween two a values or another variables
Example: clamp_temp_variable = {
var = num_dogs
min = 0
max = num_cats
}

实战 · 配合 · 坑

实战内容由 AI 生成,并已对照 vanilla 命令词表校验 —— 请当作起点而非权威依据。上方的定义节才是游戏自带文档原文。

实战用法

clamp_temp_variable 常用于数值计算后的边界保护场景，例如在动态生成资源分配、人口计算或自定义游戏机制时，确保某个临时变量的值不会超出合理范围（如负数兵力、超额补给等）。计算完成后立即钳位，可避免后续逻辑因异常值产生连锁错误。

# 计算玩家可调配的"超编师团数"，限制在 0 到当前师团上限之间
set_temp_variable = { var = excess_divisions value = total_divisions }
subtract_from_temp_variable = { var = excess_divisions value = division_cap }
clamp_temp_variable = {
    var = excess_divisions
    min = 0
    max = division_cap
}

配合关系

[set_temp_variable](/wiki/effect/set_temp_variable) — 通常先用它初始化或赋值临时变量，再用 clamp_temp_variable 对结果施加上下界约束，是最典型的前置步骤。
[add_to_temp_variable](/wiki/effect/add_to_temp_variable) / [subtract_from_temp_variable](/wiki/effect/subtract_from_temp_variable) — 累加或累减运算后数值容易越界，紧跟一次 clamp 可确保结果始终处于有效区间。
[check_variable](/wiki/trigger/check_variable) — 在 clamp 之后用它验证变量是否落在预期范围，便于调试或作为后续条件分支的判断依据。
[clamp_variable](/wiki/effect/clamp_variable) — 功能相同但作用于持久变量；当临时计算完毕需要写入持久变量时，可先 clamp 临时变量再赋值，或直接对持久变量使用 clamp_variable，两者配合覆盖不同生命周期的变量。

常见坑

min/max 顺序写反或 min > max：如果 min 的值（或变量的当前值）大于 max，结果未必报错，但会产生无法预料的钳位行为，建议在逻辑上先确保 min ≤ max，必要时用 [check_variable](/wiki/trigger/check_variable) 做前置断言。
误将普通变量名写入 var 字段：clamp_temp_variable 只对 temp variable（临时变量）生效，若目标是跨 scope 或跨事件保留的持久变量，应改用 [clamp_variable](/wiki/effect/clamp_variable)，否则修改不会产生任何持久效果。

Hands-On Notes

Hands-on notes are AI-generated and checked against the vanilla command vocabulary — treat them as a starting point, not authoritative reference. The definition above is the game's own documentation.

Hands-On Usage

clamp_temp_variable is commonly used for boundary protection after numerical calculations, such as when dynamically generating resource allocation, computing population, or implementing custom game mechanics. It ensures that a temporary variable stays within a reasonable range (e.g., preventing negative troop strength or excessive supply). Clamping immediately after calculation avoids cascading errors caused by invalid values in subsequent logic.

# Calculate the number of "overstaffed divisions" the player can allocate,
# constrained between 0 and the current division cap
set_temp_variable = { var = excess_divisions value = total_divisions }
subtract_from_temp_variable = { var = excess_divisions value = division_cap }
clamp_temp_variable = {
    var = excess_divisions
    min = 0
    max = division_cap
}

Synergy

[set_temp_variable](/wiki/effect/set_temp_variable) — Typically used first to initialize or assign a temporary variable, then clamp_temp_variable applies upper and lower bound constraints to the result. This is the most standard preparatory step.
[add_to_temp_variable](/wiki/effect/add_to_temp_variable) / [subtract_from_temp_variable](/wiki/effect/subtract_from_temp_variable) — Accumulation or subtraction operations often cause values to exceed bounds. Immediately following with a clamp ensures the result stays within valid ranges.
[check_variable](/wiki/trigger/check_variable) — Use after clamping to verify the variable falls within expected ranges, useful for debugging or as a condition for subsequent branching logic.
[clamp_variable](/wiki/effect/clamp_variable) — Identical functionality but operates on persistent variables. When temporary calculations need to be written to persistent variables, you can either clamp the temp variable first then assign it, or directly use clamp_variable on the persistent variable, with both approaches covering different variable lifecycles.

Common Pitfalls

Reversed min/max order or min > max — If the min value (or the variable's current value) exceeds max, the result may not error but will produce unpredictable clamping behavior. Ensure logically that min ≤ max beforehand; use [check_variable](/wiki/trigger/check_variable) as a pre-condition assertion if needed.
Accidentally writing a regular variable name into the var field — clamp_temp_variable only works on temp variables. If the target is a persistent variable that persists across scopes or events, use [clamp_variable](/wiki/effect/clamp_variable) instead, otherwise the modification will have no persistent effect.

effect · clamp_temp_variable