Introduction au jeu Screeps

Liens

Spawn

Create new units (creeps) with method createCreep
- creep
  - name
  - body parts $ \Rightarrow $ gives skills
  - life cycle = 1500 games ticks
“Talk” to spawn with Game.spawns['Spawn1']

Example: Create a worker creep (console):

Game.spawns['Spawn1'].createCreep( [WORK, CARRY, MOVE], 'Harvester1' );

If not enough energy units to create a creep, createCreep returns error code ERR_NOT_ENOUGH_ENERGY (-6)

Harvesting

Commands passed each game tick.

harvest method needs that the energy source is adjacent to the creep.
Game.creeps['Harvester1'] give orders to a creeps
FIND_SOURCES $ \Rightarrow $ constant
Room.find $ \Rightarrow $ method

Example: Sending a creep to harvest (Script tab):

module.exports.loop = function () {
    var creep   = Game.creeps['Harvester1'];
    var sources = creep.room.find(FIND_SOURCES);
    if (creep.harvest(sources[0]) == ERR_NOT_IN_RANGE) {
        creep.moveTo(sources[0]);
    }
}

Transfer engergy back to the spawn

Creep.transfer methode (should be done when the creep is next to the spawn)

Example:

module.exports.loop = function () {
    var creep = Game.creeps['Harvester1'];

    if (creep.carry.energy < creep.carryCapacity) {
        var sources = creep.room.find(FIND_SOURCES);
        if (creep.harvest(sources[0]) == ERR_NOT_IN_RANGE) {
            creep.moveTo(sources[0]);
        }
    }
    else {
        if (creep.transfer(Game.spawns['Spawn1'], RESOURCE_ENERGY) == ERR_NOT_IN_RANGE) {
            creep.moveTo(Game.spawns['Spawn1']);
        }
    }
}

Duplicating behavior

Could duplicate the code but for loop against all the screeps in Game.creeps is a better choice.

Example:

module.exports.loop = function () {
    for (var name in Game.creeps) {
        var creep = Game.creeps[name];
        
        if (creep.carry.energy < creep.carryCapacity) {
            var sources = creep.room.find(FIND_SOURCES);
            if (creep.harvest(sources[0]) == ERR_NOT_IN_RANGE) {
                creep.moveTo(sources[0]);
            }
        }
        else {
            if (creep.transfer(Game.spawns['Spawn1'], RESOURCE_ENERGY) == ERR_NOT_IN_RANGE) {
                creep.moveTo(Game.spawns['Spawn1']);
            }
        }
    }
}

Modules

Creating a module called role.harvester $ \Rightarrow $ module section

defining a run function inside the module.exports object
- module.exports contain creeps behaviors

role.harvester module:

var roleHarvester = {

    // @param {creep} creep
    run: function(creep) {
        if (creep.carry.energy < creep.carryCapacity) {
            var sources = creep.room.find(FIND_SOURCES);
            if (creep.harvest(sources[0]) == ERR_NOT_IN_RANGE) {
                creep.moveTo(sources[0]);
            }
        }
        else {
            if (creep.transfer(Game.spawns['Spawn1'], RESOURCE_ENERGY) == ERR_NOT_IN_RANGE) {
                creep.moveTo(Game.spawns['Spawn1']);
            }
        }
    }
};

module.exports = roleHarvester;

main module:

var roleHarvester = require('role.harvester');

module.exports.loop = function () {
    for (var name in Game.creeps) {
        var creep = Game.creeps[name];
        roleHarvester.run(creep);
    }
}

We only keep the for loop and a call to our new module by the method require('role.harvester').

Directory