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**Help section / AI learning for Void Expanse Drones of the 9sMODs series. In need of opinions**

« **on:**August 05, 2019, 08:26:14 pm »

I am working on a version of AI learning/machine Learning for Void Expanse so that I can use that on the drones to make their movement better in game and also for their decision making. I am barely getting started in this though. I am currently working on a version of it based on the series by Sebastian Lague here : https://www.youtube.com/watch?v=bVQUSndDllU

He built his tutorial in Python, although that wasn't why I decided to learn a bit of Python a couple of days ago, it was actually for exporting TONS of objects and build XML files for Void Expanse all at the same time. I've decided to "try" and translate his Python tutorial of Episode 1 and 2 mathematical equations to c# inside of Unity and started playing with that. But I am encountering some "obstacles". For instance, when Sebastian Lague explains the mathematical equations in episode 1 and 2, there is something that I am missing. I don't know how he is using the "output" of the Neural Network. Is he "re-feeding" it into the neural network as inputs in order for the neural network to complete a certain number of iterations until it reaches the goal?

If anyone has any idea of how Machine Learning works, and has really good explanations that can be understood for a beginner, I would be really interested in asking questions. here is what I have so far.. Although the script is able to get to the goal whether it is closer to 1 or closer to 0 which is going to be perfect for me when using the Dot product for the movement in Void Expanse, I have no clue if this qualifies as a Neural Network.

He built his tutorial in Python, although that wasn't why I decided to learn a bit of Python a couple of days ago, it was actually for exporting TONS of objects and build XML files for Void Expanse all at the same time. I've decided to "try" and translate his Python tutorial of Episode 1 and 2 mathematical equations to c# inside of Unity and started playing with that. But I am encountering some "obstacles". For instance, when Sebastian Lague explains the mathematical equations in episode 1 and 2, there is something that I am missing. I don't know how he is using the "output" of the Neural Network. Is he "re-feeding" it into the neural network as inputs in order for the neural network to complete a certain number of iterations until it reaches the goal?

If anyone has any idea of how Machine Learning works, and has really good explanations that can be understood for a beginner, I would be really interested in asking questions. here is what I have so far.. Although the script is able to get to the goal whether it is closer to 1 or closer to 0 which is going to be perfect for me when using the Dot product for the movement in Void Expanse, I have no clue if this qualifies as a Neural Network.

Code: [Select]

`using System.Collections;`

using System.Collections.Generic;

using UnityEngine;

using System;

public class SC_Neural_Network : MonoBehaviour

{

double[] input;

double[] weightsOne;

double[] hiddenLayer;

double[] lastHiddenLayer;

double[] biasValueOne;

double[] biasValueTwo;

double[] output;

double[] lastOutput;

double[] currentOutputError = new double[2];

double[] lastOutputError = new double[2];

double[] currentHiddenLayerOutputError = new double[3];

double[] lastHiddenLayerOutputError = new double[3];

double[] lastHiddenPercentChanged = new double[3];

double[] currentHiddenPercentChanged = new double[3];

double[] weightsTwo;

System.Random rand = new System.Random();

double[] lastPercentChanged = new double[2];

double[] currentPercentChanged = new double[2];

public void Start()

{

input = new double[2];

weightsOne = new double[6];

hiddenLayer = new double[3];

lastHiddenLayer = new double[3];

biasValueOne = new double[3];

biasValueTwo = new double[2];

output = new double[2];

weightsTwo = new double[6];

lastOutput = new double[2];

neuralNet(0.001, 100); // right now, can only use 0.001 or 0.999

}

double oriGoal = 0;

int starter = 0;

int finisher = 0;

int someCounter = 0;

//right now only working for input of 2 and hidden layer of 3 and output of 2 and biasOne 3 and biasTwo 2 and WeightsOne 6 and WeightsTwo 6

private void neuralNet(double goal,int counterMax)

{

oriGoal = goal;

while (someCounter < counterMax && finisher == 0)

{

if (starter == 0)

{

input[0] = rand.NextDouble();

input[1] = rand.NextDouble();

for (int c1 = 0; c1 < weightsOne.Length; c1++)

{

weightsOne[c1] = rand.NextDouble();

weightsTwo[c1] = rand.NextDouble();

}

for (int c1 = 0; c1 < biasValueOne.Length; c1++)

{

biasValueOne[c1] = rand.NextDouble();

}

for (int c1 = 0; c1 < biasValueTwo.Length; c1++)

{

biasValueTwo[c1] = rand.NextDouble();

}

starter = 1;

}

else

{

input[0] = output[0];

input[1] = output[1];

}

for (int c = 0; c < hiddenLayer.Length; c++)

{

hiddenLayer[c] = ActivationFunction(input[0] * weightsOne[c * 2 + 0] + input[1] * weightsOne[c * 2 + 1] + biasValueOne[c]);

}

for (int c = 0; c < output.Length; c++)

{

output[c] = ActivationFunction(hiddenLayer[0] * weightsTwo[c * 3 + 0] + hiddenLayer[1] * weightsTwo[c * 3 + 1] + hiddenLayer[2] * weightsTwo[c * 3 + 2] + biasValueTwo[c]);

if (output[c] <= goal && goal >= 0.999)

{

currentOutputError[c] = 1 - output[c];

lastOutputError[c] = 1 - lastOutput[c];

var totalDiffInError = Math.Abs(currentOutputError[c] - lastOutputError[c]);

currentPercentChanged[c] = totalDiffInError / currentOutputError[c];

var diffToGoal = Math.Abs(goal - currentOutputError[c]);

if (currentOutputError[c] >= lastOutputError[c])

{

for (int c1 = 0; c1 < weightsOne.Length; c1++)

{

currentPercentChanged[c] *= 1.19;

double someTest = (currentOutputError[c] * currentPercentChanged[c]);

weightsOne[c1] = weightsOne[c1] - someTest;

someTest = (currentOutputError[c] * currentPercentChanged[c]);

currentPercentChanged[c] *= 1.19;

weightsTwo[c1] = weightsTwo[c1] - someTest;

}

}

else if (currentOutputError[c] < lastOutputError[c])

{

for (int c1 = 0; c1 < weightsOne.Length; c1++)

{

currentPercentChanged[c] *= 1.19;

double someTest = (currentOutputError[c] * currentPercentChanged[c]);

weightsOne[c1] = weightsOne[c1] + someTest;

someTest = (currentOutputError[c] * currentPercentChanged[c]);

currentPercentChanged[c] *= 1.19;

weightsTwo[c1] = weightsTwo[c1] + someTest;

}

}

}

else if(output[c] >= goal && goal <= 0.001)

{

//Debug.Log("test00");

currentOutputError[c] = 1 - output[c];

lastOutputError[c] = 1 - lastOutput[c];

var totalDiffInError = Math.Abs(currentOutputError[c] - lastOutputError[c]);

currentPercentChanged[c] = totalDiffInError / currentOutputError[c];

var diffToGoal = Math.Abs(goal - currentOutputError[c]);

if (currentOutputError[c] >= lastOutputError[c])

{

for (int c1 = 0; c1 < weightsOne.Length; c1++)

{

currentPercentChanged[c] *= 1.33;

double someTest = (currentOutputError[c] * currentPercentChanged[c]);

weightsOne[c1] = weightsOne[c1] + someTest;

currentPercentChanged[c] *= 1.33;

someTest = (currentOutputError[c] * currentPercentChanged[c]);

weightsTwo[c1] = weightsTwo[c1] + someTest;

}

}

else if (currentOutputError[c] < lastOutputError[c])

{

for (int c1 = 0; c1 < weightsOne.Length; c1++)

{

currentPercentChanged[c] *= 1.33;

double someTest = (currentOutputError[c] * currentPercentChanged[c]);

weightsOne[c1] = weightsOne[c1] - someTest;

currentPercentChanged[c] *= 1.33;

someTest = (currentOutputError[c] * currentPercentChanged[c]);

weightsTwo[c1] = weightsTwo[c1] - someTest;

}

}

/*else //not used but if the above variable 1.33 is less than 1.19, it breaks the script and i gotta implement this part

{

}*/

}

else if(output[c] <= goal && goal <= 0.001 || output[c] >= goal && goal >= 0.999)

{

finisher = 1;

Debug.Log("FINISHED AND REACHED GOAL");

}

lastPercentChanged[c] = currentPercentChanged[c];

lastOutput[c] = output[c];

Debug.Log(output[c]);

}

someCounter++;

}

}

double ActivationFunction(double x)

{

return (1 / (1 + Mathf.Exp((float)-x)));

}

}

**EDIT: this can hardly be qualified as a neural network except for the variable names in the script. I am far from the goal. Will keep learning and searching for more info on how to implement a working version in c# or javascript.**