pistoncontroller_v2.cs

/* Piston Controller script for Space Engineers - by TerrorBite */
const float TOLERANCE = 0.08F;
string status = "";

Dictionary<string, string> Properties;

void LoadProperties() {
    Properties = new Dictionary<string, string>(); 
    if(string.IsNullOrEmpty(Storage)) return;
    string[] records = Storage.Split('\x1E');
    for(int i=0; i<records.Length; i++) {
        string[] fields = records[i].Split('\x1F');
        Properties.Add(fields[0], fields[1]);
    }
}

void SaveProperties() {
    StringBuilder sb = new StringBuilder();
    var i = Properties.GetEnumerator();
    if(i.MoveNext()) sb.Append(string.Format("{0}\x1F{1}", i.Current.Key, i.Current.Value));
    while(i.MoveNext()) {
        sb.Append("\x1E");
        sb.Append(string.Format("{0}\x1F{1}", i.Current.Key, i.Current.Value));
    }
}

void ElevatorSendTo(IMyPistonBase piston, float targetHeight) {
    if(piston.CurrentPosition + TOLERANCE > targetHeight &&
        piston.CurrentPosition - TOLERANCE < targetHeight) {
        Echo("Piston already at destination");
        return;
    }

    Properties[string.Format("{0}.target", piston.CustomName)] = targetHeight.ToString();
 
    // Turn on the piston 
    piston.ApplyAction("OnOff_On"); 
 
    // Calculate whether we need to travel up or down, set limits accordingly 
    if(targetHeight > piston.CurrentPosition) { 
        // we need to move upwards (extend)
        piston.SetValue("UpperLimit", targetHeight);
        if(piston.Velocity < 0) piston.ApplyAction("Reverse");
    } else { 
        // we need to move downwards (retract)
        piston.SetValue("LowerLimit", targetHeight);
        if(piston.Velocity > 0) piston.ApplyAction("Reverse"); 
    } 
    status = string.Format("Piston {0} {2} at {1}m/s", piston.CustomName, piston.Velocity, piston.Status);
    Echo(status); 
}

void Main(string argument)
{
    if(Properties==null) LoadProperties();

    string[] args = argument.Split(',');
    if(args.Length < 2) return;

    // Get requested piston
    IMyPistonBase piston = GridTerminalSystem.GetBlockWithName(args[0]) as IMyPistonBase;
    if(piston == null) {
        Echo(string.Format("Piston block \"{0}\" was not found.", args[0]));
        return;
    }

    ElevatorSendTo(piston, float.Parse(args[1]));
}