CODEWITHSUNDEEP
c#unity-game-engine
pepefrog69
pepefrog69

Reputation: 27

How to store position data and export it into a csv file?

I am currently working on a school project where I'll be using motion capture and unity. It's made for the elderly to improve their cognitive and motoric functions. I want unity to be able to record their movements into a csv file to see how well they are doing. I want the x, y and z co-ordinates recorded against time in excel.

I'm using perception neuron for my motion capture which have a total of 32 sensors. The 3D model in unity has 32 different parts/limbs that move, including the fingers. I added a picture of it here:

This is what the 3D model for perception neuron looks like

I tried to use this example but it extracts data as a text file.

using UnityEngine;
using System.Collections;
using System.IO;
using System;

    public class fileMaker : MonoBehaviour
    {
        public static void putBytes(ref byte[] output, int index, float value)
        {
            //turns a float into its 4 bytes and then puts them into the output array
            //at the given index
            byte[] data = BitConverter.GetBytes(value);
            output[index] = data[0];
            output[index + 1] = data[1];
            output[index + 2] = data[2];
            output[index + 3] = data[3];
        }
        public static void makeFile(Vector3 position)
        {
            //each float is 4 bytes.
            //3 floats in a vector 3(x,y,z) and 3x4 =12!
            byte[] output = new byte[12];
            //get bytes for each part of our lil vector3
            putBytes(ref output, 0, position.x);
            putBytes(ref output, 4, position.y);
            putBytes(ref output, 8, position.z);
            File.WriteAllBytes(Application.dataPath + "/log.txt", output);
        }
        public static void loadFile()
        {
            //converts it all back into pretty print
            if (File.Exists(Application.dataPath + "/log.txt"))
            {
                byte[] input = File.ReadAllBytes(Application.dataPath + "/log.txt");
                int length = input.Length;
                if (length == 12)
                {
                    Vector3 ourVector3 = new Vector3();
                    ourVector3.x = (float)BitConverter.ToSingle(input, 0);
                    ourVector3.y = (float)BitConverter.ToSingle(input, 4);
                    ourVector3.z = (float)BitConverter.ToSingle(input, 8);
                    print("Position saved in file (" + Application.dataPath + "/log.txt): " + ourVector3.ToString());
                }

            }
        }
    }

I want unity to record position data for each part. Does this mean I have to write a script for each limb (which is a game object) or can I write one single script and connect to all the limbs?

I also want to know if I can change this code above to store data as a csv file instead of a text file; can I change a few lines or do I have to make a new script? I'm very new to unity and computer programming.

Upvotes: 1

Views: 1897

Answers (1)

Kiroul
Kiroul

Reputation: 535

If all your limbs have the same behaviour you could declare an Interface. Something like:

public interface I3DPosition{
    string Get3DCoordinates();
}

and you link you limb object to this Interface

public LimbObject : I3DPosition

Maybe you could also do some inheritance. These are pretty Basic for object oriented programming. For writing the csv it should be really easy with:

File.WriteAllText(filePath, "x,y,z");

and/or

File.AppendAllText(filePath, "x,y,z");

see here

Upvotes: 2

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