Screeps - Guide to Logistic Creeps for Energy Transport

A little guide for the game Screeps, on how to use creeps to transport energy between structures. Screeps is a real-time strategy Javascript-programming game. Note that the code I present is not in any way CPU optimized. I have tried to keep it simple. Code used in the video: -------------------- Logistic -------------------- var roleLogistic = { /** @param {Creep} creep **/ run: function(creep) { if(creep.memory.supplying && creep.carry.energy == 0) { creep.memory.supplying = false; creep.say('fetching'); } if(!creep.memory.supplying && creep.carry.energy == creep.carryCapacity) { creep.memory.supplying = true; creep.say('supplying'); } if (creep.memory.supplying) { var stores = creep.room.find(FIND_STRUCTURES, { filter: (structure) => { return (structure.structureType == STRUCTURE_STORAGE) && (structure.store[RESOURCE_ENERGY] < structure.storeCapacity); } }); if (stores && stores.length > 0) { if(creep.transfer(stores[0], RESOURCE_ENERGY) == ERR_NOT_IN_RANGE) { creep.moveTo(stores[0]); } } } else { var containers = creep.room.find(FIND_STRUCTURES, { filter: (structure) => { return (structure.structureType == STRUCTURE_CONTAINER) && (structure.store[RESOURCE_ENERGY] > 0); } }); var source = creep.pos.findClosestByPath(containers); if (source) { if(creep.withdraw(source, RESOURCE_ENERGY) == ERR_NOT_IN_RANGE) { creep.moveTo(source); } } } } }; module.exports = roleLogistic;