Pick next value from string on mouse click

Question

This might be a newbie question, but I really need some advice. For the project I'm working on, I need to export some parameters into csv file. On mouse click, I need to get: display x coordinate, display y coordinate, first number from string, second number from string. I'm fine with getting this so far.

The question is, how can I get {x, y, 3rd number from string, 4th number from string}; {x, y, 5th number from string, 6th number from string} and so on with every next mouse click? I was trying to do something with [index-1] [index+1]but without success so far.

Would be happy to get any advice. Thank you in advance!

 public class SendToCsv : MonoBehaviour
 {
     private List<string[]> rowData = new List<string[]>();
     public List<string> UV = new List<string>(); //String with values from which to pick
 
     void Start()
     {
         UV.Add("2");
         UV.Add("4");
         UV.Add("6"); //Here I add more numbers of course
     } 
 
     void Update()
     {
         if (Input.GetButtonDown("Fire1"))
         {
             string[] rowDataTemp = new string[4];
             rowDataTemp[0] = Input.mousePosition.x.ToString("F4"); // X
             rowDataTemp[1] = Input.mousePosition.y.ToString("F4"); // Y
             rowDataTemp[2] = UV[1]; //This value must change with each click
             rowDataTemp[3] = UV[2];  //This value must change with each click
 
             rowData.Add(rowDataTemp);
 
             string[][] output = new string[rowData.Count][];
 
             for (int i = 0; i < output.Length; i++)
             {
                 output[i] = rowData[i];
             }
 
             int length = output.GetLength(0);
             string delimiter = ",";
 
             StringBuilder sb = new StringBuilder();
 
             for (int index = 0; index < length; index++)
                 sb.AppendLine(string.Join(delimiter, output[index]));
 
             string filePath = getPath();
 
             StreamWriter outStream = System.IO.File.CreateText(filePath);
             outStream.WriteLine(sb);
             outStream.Close();
         }
     }
  }

Answer 1

 public class SendToCsv : MonoBehaviour
  {
      private List<string[]> rowData = new List<string[]>();
      public List<string> UV = new List<string>(); //String with values from which to pick
      private int uvIndex = 0;
  
      void Start()
      {
          UV.Add("2");
          UV.Add("4");
          UV.Add("6"); //Here I add more numbers of course
      } 
  
      void Update()
      {
          if (Input.GetButtonDown("Fire1"))
          {
              string[] rowDataTemp = new string[4];
              rowDataTemp[0] = Input.mousePosition.x.ToString("F4"); // X
              rowDataTemp[1] = Input.mousePosition.y.ToString("F4"); // Y
              rowDataTemp[2] = UV[uvIndex];
              rowDataTemp[3] = UV[uvIndex+1];

              rowData.Add(rowDataTemp);
              uvIndex += 2;
  
              string[][] output = new string[rowData.Count][];
  
              for (int i = 0; i < output.Length; i++)
              {
                  output[i] = rowData[i];
              }
  
              int length = output.GetLength(0);
              string delimiter = ",";
  
              StringBuilder sb = new StringBuilder();
  
              for (int index = 0; index < length; index++)
                  sb.AppendLine(string.Join(delimiter, output[index]));
  
              string filePath = getPath();
  
              StreamWriter outStream = System.IO.File.CreateText(filePath);
              outStream.WriteLine(sb);
              outStream.Close();
          }
      }
   }

But, be carefull, if you click too many times, uvIndex will be creater than UV.Count and you will have an ArgumentOutOfRangeException.

I don't know how you want to handle the case. You could "loop" and replace

 uvIndex += 2;

By

 uvIndex = (uvIndex + 2) % UV.Count;

Or clamp the value of uvIndex and replace

 uvIndex += 2;

By

 uvIndex = Mathf.Min( uvIndex + 2, UV.Count - 2);

Pick next value from string on mouse click

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