Grouping In Verse

Grouping expressions is a way to specify order of evaluation, which is useful if you need to work around operator precedence.

You can group expressions by using ().

For example, the expressions (y2 - y1) and (x2 - x1) below are evaluated before dividing the numbers.

(y2 - y1) / (x2 - x1)

(y2 - y1) / (x2 - x1)

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As an example, take an in-game explosion that scales its damage based on the distance from the player, but where the player's armor can reduce the total damage:

BaseDamage : float = 100
Armor : float = 15

# Scale by square distance between the player and the explosion. 1.0 is the minimum
DistanceScaling : float = Max(1.0, Pow(PlayerDistance, 2.0))

# The farther the explosion is, the less damage the player takes
var ExplosionDamage : float = BaseDamage / DistanceScaling

# Reduce the damage by armor

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Using grouping, you could rewrite the example above as:

|  |  |
| --- | --- |
|  | BaseDamage : float = 100 |
|  | Armor : float = 15 |
|  | DistanceScaling : float = Max(1.0, Pow(PlayerDistance, 2.0)) |
|  | ExplosionDamage : float = Max(0.0, (BaseDamage / DistanceScaling) - Armor) |