Code

Robot Rumble ALPHA
discord
try it!
boards
tutorial
docs
let ourRobots = null;
let enemyRobots = null;

function initTurn(state) {
  ourRobots = state.objsByTeam(state.ourTeam);
  enemyRobots = state.objsByTeam(state.otherTeam);
}

function robot(state, unit) {
  let closest = closestEnemy(unit);
  let escapeSpawnDirection = awayFromBorder(unit, state);
  if (unit.coords.walkingDistanceTo(closest.coords) <= 3) {
    debug.locate(unit);
    debug.locate(closest);
    
    let enemyDirection = unit.coords.directionTo(closest.coords);
    
    let outputDirection = enemyDirection.opposite;
    while(!canGo(unit, outputDirection, state) || outputDirection == enemyDirection) {
      // rotate until there is good spot to go
      outputDirection = outputDirection.rotateCw;
    }
    
    return Action.move(outputDirection);
  } else if (escapeSpawnDirection != null) {
    return Action.move(escapeSpawnDirection);
  }
  
  return null;
}

function closestEnemy(unit) {
  let closest = null;
  let closestDistance = 100000;
  enemyRobots.forEach(function(enemy) {
    let distance = enemy.coords.walkingDistanceTo(unit.coords);
    if (distance < closestDistance) {
      closest = enemy;
      closestDistance = distance;
    }
  });
  
  return closest;
}

// checks if unit is trying to go out of the map
function canGo(unit, direction, state) {
  let objFromCoords = state.objByCoords(direction.toCoords.add(unit.coords));

  if (objFromCoords == null) {
    return true;
  }
  
  return false;
}

// if it's next to a border it will return a direction to get away
// otherwise it will return null
function awayFromBorder(unit, state) {
  // edges of the map == ObjType.Terrain
  let northObj = state.objByCoords(Direction.North.toCoords.add(unit.coords));
  let eastObj = state.objByCoords(Direction.East.toCoords.add(unit.coords));
  let southObj = state.objByCoords(Direction.South.toCoords.add(unit.coords));
  let westObj = state.objByCoords(Direction.West.toCoords.add(unit.coords));
  
  if (northObj != null && northObj.objType == ObjType.Terrain) {
    return Direction.South;
  } else if (eastObj != null && eastObj.objType == ObjType.Terrain) {
    return Direction.West;
  } else if (southObj != null && southObj.objType == ObjType.Terrain) {
    return Direction.North;
  } else if (westObj != null && westObj.objType == ObjType.Terrain) {
    return Direction.East;
  }
  
  return null;
}