Method behaviorNode

source/game/StarBehaviorDatabase.cpp:252–296

}

BehaviorNodeConstPtr BehaviorDatabase::behaviorNode(Json const& json, StringMap<NodeParameterValue> const& treeParameters, BehaviorTree& tree) const {
  BehaviorNodeType type = BehaviorNodeTypeNames.getLeft(json.getString("type"));

  auto name = json.getString("name");
  auto parameterConfig = json.getObject("parameters", {});

  if (type == BehaviorNodeType::Module) {
      // merge in module parameters to a copy of the treeParameters to propagate
      // tree parameters into the sub-tree, but allow modules to override
      auto moduleParameters = treeParameters;
      for (auto p : parameterConfig)
        moduleParameters.set(p.first, replaceBehaviorTag(nodeParameterValueFromJson(p.second), treeParameters));

      BehaviorTree module = *buildTree(m_configs.get(name), moduleParameters);
      tree.scripts.addAll(module.scripts);
      tree.functions.addAll(module.functions);

      return module.root;
  }

  StringMap<NodeParameter> parameters = m_nodeParameters.get(name);
  for (auto& p : parameters)
    p.second.second = parameterConfig.maybe(p.first).apply(nodeParameterValueFromJson).value(p.second.second);
  applyTreeParameters(parameters, treeParameters);

  if (type == BehaviorNodeType::Action) {
    tree.functions.add(name);

    Json outputConfig = json.getObject("output", {});
    StringMap<NodeOutput> output = m_nodeOutput.get(name);
    for (auto& p : output)
      p.second.second.first = replaceOutputBehaviorTag(outputConfig.optString(p.first).orMaybe(p.second.second.first), treeParameters);

    return make_shared<BehaviorNode>(ActionNode(name, parameters, output));
  } else if (type == BehaviorNodeType::Decorator) {
    tree.functions.add(name);
    BehaviorNodeConstPtr child = behaviorNode(json.get("child"), treeParameters, tree);
    return make_shared<BehaviorNode>(DecoratorNode(name, parameters, child));
  } else if (type == BehaviorNodeType::Composite) {
    return make_shared<BehaviorNode>(compositeNode(json, parameters, treeParameters, tree));
  }

  // above statement must be exhaustive
  throw StarException(strf("Behavior node type '{}' could not be created from JSON", BehaviorNodeTypeNames.getRight(type)));
}

}