I have the following code from the tutorial, except in simulation mode it isn't working..

if(creep.memory.role == 'builder') {

    if(creep.energy === 0) {
        creep.moveTo(Game.spawns.Spawn1);
        Game.spawns.Spawn1.transferEnergy(creep);
    }
    else {
        var targets = creep.room.find(Game.CONSTRUCTION_SITES);
        if(targets.length) {
            creep.moveTo(targets[0]);
            creep.build(targets[0]);
        }
    }
}

Printing the result of "targets" in the console, responds undefined. Can anyone explain how the "CONSTRUCTION_SITES" constant is working and how to find them inside the room?

I have the following code from the tutorial, except in simulation mode it isn't working..

if(creep.memory.role == 'builder') {

    if(creep.energy === 0) {
        creep.moveTo(Game.spawns.Spawn1);
        Game.spawns.Spawn1.transferEnergy(creep);
    }
    else {
        var targets = creep.room.find(Game.CONSTRUCTION_SITES);
        if(targets.length) {
            creep.moveTo(targets[0]);
            creep.build(targets[0]);
        }
    }
}

Printing the result of "targets" in the console, responds undefined. Can anyone explain how the "CONSTRUCTION_SITES" constant is working and how to find them inside the room?

• javascript
• screeps

Share Improve this question Follow edited Jul 14, 2021 at 14:40 Wenfang Du 11.5k1313 gold badges7676 silver badges114114 bronze badges asked Nov 21, 2014 at 18:56 webecreativewebecreative 19711 gold badge33 silver badges1111 bronze badges

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3 Answers 3

Sorted by: Reset to default 5

The code looks right to me, it seems that you don't actually have any constructions set for the builders to build. Did you use the "Construct" menu on the left to build a road, for example?

I don't know if this has been answered yet, or if it's just that the syntax from the game has changed which is why you initially wrote it this way, but this code works for what you're doing:

var targets = creep.room.find(FIND_CONSTRUCTION_SITES);

In Screeps console.log() always prints undefined. In line before undefined you can find printed value:

> console.log(Game)
[hh:mm:ss] [object Object]
< undefined