Method execute

packages/procgen/src/nodes/ProcGenNodes.ts:258–280

(node: BlueprintNode, context: unknown)

export class WeightedPickExecutor implements INodeExecutor {
    execute(node: BlueprintNode, context: unknown): ExecutionResult {
        const ctx = context as ProcGenContext;
        const seed = ctx.evaluateInput(node.id, 'seed', 0) as number;
        const index = ctx.evaluateInput(node.id, 'index', 0) as number;
        const items = ctx.evaluateInput(node.id, 'items', []) as unknown[];
        const weights = ctx.evaluateInput(node.id, 'weights', []) as number[];

        if (items.length === 0) {
            return { outputs: { value: null, selectedIndex: -1 } };
        }

        const rng = new SeededRandom(seed + index * 12345);

        // Build weighted items
        const weightedItems: WeightedItem<{ value: unknown; index: number }>[] = items.map((item, i) => ({
            value: { value: item, index: i },
            weight: weights[i] ?? 1
        }));

        const result = weightedPick(weightedItems, rng);

        return { outputs: { value: result.value, selectedIndex: result.index } };
    }
}

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