@elite-dangerous-almanac/core / ships / ShieldMetrics

Defined in: src/ships/shields.ts:136

A build's shield strength, where it comes from, and what it resists.

Frozen — nested records and lists included — so a result can be held, cached and shared without a defensive copy. Derive a changed figure with a spread rather than by assigning into one.

readonly boosters: number

Defined in: src/ships/shields.ts:142

What the boosters add on top of the generator, in megajoules.

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readonly boostMultiplier: number

Defined in: src/ships/shields.ts:155

The boosters' combined multiplier, 1 with none fitted (1.6 = +60%). 1 with no generator, whatever boosters are fitted — there is nothing for them to multiply.

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readonly effectiveHitPoints: DamageTypeValues

Defined in: src/ships/shields.ts:175

Effective hit points against each damage type, in megajoules — strength / (1 − resistance), the raw damage of that type the shield can soak. Infinity where a resistance reaches 100%.

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readonly generator: number

Defined in: src/ships/shields.ts:140

The generator's own contribution, in megajoules.

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readonly massCurveMultiplier: number

Defined in: src/ships/shields.ts:150

The generator's strength multiplier at this hull mass. 0 with no generator.

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readonly reinforcement: number

Defined in: src/ships/shields.ts:148

What Guardian shield reinforcement packages add, in megajoules. 0 with no generator, whatever reinforcement was passed — a package has no shield to reinforce.

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readonly resistances: DamageTypeValues

Defined in: src/ships/shields.ts:169

Effective resistances, generator and boosters stacked with diminishing returns. The SYS pips are not in these — they belong to the capacitor, and shieldCapacitorMetrics folds them in. 0 for every damage type when no generator is fitted.

Fractions rather than percentages, and unrounded: the stacking is floating-point arithmetic, so a nominal −20% reads as -0.19999999999999996 rather than -0.2. Round where the figure is displayed, not before it is composed further — ShieldMetrics.effectiveHitPoints is derived from exactly these values.

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readonly strength: number

Defined in: src/ships/shields.ts:138

Total shield strength, in megajoules. 0 when no generator is fitted.