Evolution

Assets/Creature.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class Creature 
+{
+	public Vector2 position;
+	public int age;
+	public GameObject go;
+
+	DNA dna;	
+	float hunger;
+
+
+
+	public Creature(GameObject g, float x, float y)
+	{
+		//Random DNA
+		go = GameObject.Instantiate(g);
+		SetPosition(new Vector2(x, y));
+		dna = new DNA();
+		go.GetComponent<SpriteRenderer>().color = dna.randomColor;
+		go.GetComponent<Transform>().localScale = go.GetComponent<Transform>().localScale * dna.size;
+		age = 0;
+	}
+
+	public Creature(GameObject g, float x, float y, Creature parent1, Creature parent2)
+	{
+		//DNA constructor with mother and father DNA 
+		go = GameObject.Instantiate(g);
+		SetPosition(new Vector2(x, y));
+		dna = new DNA(parent1.dna, parent2.dna);
+		go.GetComponent<SpriteRenderer>().color = dna.randomColor;
+		go.GetComponent<Transform>().localScale = go.GetComponent<Transform>().localScale * dna.size;
+		age = 0;
+	}
+
+	void SetPosition(Vector2 p)
+	{
+		position = p;
+		go.transform.position = p;
+	}
+
+	void Move(Vector2 movement)
+	{
+		SetPosition(position + movement);
+	}
+
+    public void Step()
+	{
+		Vector2 movement = new Vector2(Random.Range(0.05f, -0.05f), Random.Range(0.05f, -0.05f)) * dna.speed;
+		Move(movement);
+	}		
+}

Assets/CreatureManager.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class CreatureManager : MonoBehaviour
+{
+
+	public static CreatureManager Instance;
+	public GameObject prefab;
+	public int initCreatures;
+
+	List<Creature> creatures;
+
+	private void Awake()
+	{
+		if(Instance == null)
+		{
+			Instance = this;
+			DontDestroyOnLoad(gameObject);
+		}
+		else
+		{
+			Destroy(this);
+		}
+	}
+
+	private void Start()
+	{
+		creatures = new List<Creature>();
+		for (int i = 0; i < initCreatures; i++)
+		{
+			creatures.Add(new Creature(prefab, Random.Range(-1,1),Random.Range(-1,1)));
+
+		}
+	}
+
+	private void Update()
+	{
+		for (int i = 0; i < creatures.Count; i++)
+		{
+			creatures[i].Step();
+			creatures[i].age++;
+			if(creatures[i].age > 2000 || creatures.Count > 75)
+			{
+				print(" Death " + i);
+
+				Destroy(creatures[i].go);
+				creatures.RemoveAt(i);
+			}
+			for (int ii = 0; ii < creatures.Count; ii++)
+			{
+				if (i != ii && creatures[i].age > 500 && creatures[ii].age > 500)
+				{
+					if (Vector2.Distance(creatures[i].position, creatures[ii].position) < 0.075)
+					{
+						print("Birth");
+						Vector2 placeOfBirth = new Vector2(creatures[i].position.x, creatures[i].position.y);
+
+						creatures.Add(new Creature(prefab, placeOfBirth.x, placeOfBirth.y, creatures[i], creatures[ii]));
+					}
+				}
+			}
+		}
+	}
+
+	public void RegisterCreature(Transform transform)
+	{
+		creatures.Add(new Creature(prefab, transform.position.x, transform.position.y));
+	}
+}

Assets/DNA.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class DNA
+{
+	float colorR = Random.value, colorG = Random.value, colorB = Random.value, colorA = 255f;
+	float curiosity, aggression, hungerSpeed;
+
+	public float size, speed;		
+	public Color randomColor;
+
+	public DNA()
+	{
+		//Random DNA
+		randomColor = new Color(colorR, colorG, colorB, colorA);
+		size = Random.Range(1f, 4f);
+		speed = Random.Range(1f, 3f);
+		curiosity = Random.Range(1f, 10f);
+		aggression = Random.Range(1f, 10f);
+		hungerSpeed = Random.Range(1f, 5f); 
+	}
+
+	public DNA(DNA father, DNA mother)
+	{
+		//Randomly chooses values from mother and father.
+		randomColor = mateColor(father.randomColor, mother.randomColor);
+		size = mateValue(father.size, mother.size);
+		speed = mateValue(father.size, mother.size);
+		curiosity = mateValue(father.size, mother.size);
+		aggression = mateValue(father.aggression, mother.aggression);
+		hungerSpeed = mateValue(father.hungerSpeed, mother.hungerSpeed);
+
+	}
+
+	public DNA(DNA father, DNA mother, float mutationProbability)
+	{
+		//Same as the one before but randomly changes some values.
+		randomColor = mateColor(father.randomColor, mother.randomColor);
+		size = mateValue(father.size, mother.size);
+		speed = mateValue(father.size, mother.size);
+		curiosity = mateValue(father.size, mother.size);
+		aggression = mateValue(father.aggression, mother.aggression);
+		hungerSpeed = mateValue(father.hungerSpeed, mother.hungerSpeed);
+	}
+
+	Color mateColor(Color val1, Color val2)
+	{
+		float r = Random.value;
+
+		if (r > 0.5)
+		{
+			return val1;
+		}
+		else
+		{
+			return val2;
+		}
+	}
+
+
+	float mateValue(float val1, float val2)
+	{
+		float r = Random.value;
+
+		if(r > 0.5)
+		{
+			return val1;
+		}
+		else
+		{
+			return val2;
+		}
+	}
+}

Assets/DNADescription.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class DNADescription : MonoBehaviour
+{
+    // Start is called before the first frame update
+    void Start()
+    {
+		CreatureManager.Instance.RegisterCreature(transform);
+    }
+
+    // Update is called once per frame
+    void Update()
+    {
+
+    }
+}

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