commit

.gitignore

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+# This .gitignore file should be placed at the root of your Unity project directory
+#
+# Get latest from https://github.com/github/gitignore/blob/master/Unity.gitignore
+#
+/[Ll]ibrary/
+/[Tt]emp/
+/[Oo]bj/
+/[Bb]uild/
+/[Bb]uilds/
+/[Ll]ogs/
+/[Uu]ser[Ss]ettings/
+
+# MemoryCaptures can get excessive in size.
+# They also could contain extremely sensitive data
+/[Mm]emoryCaptures/
+
+# Asset meta data should only be ignored when the corresponding asset is also ignored
+!/[Aa]ssets/**/*.meta
+
+# Uncomment this line if you wish to ignore the asset store tools plugin
+# /[Aa]ssets/AssetStoreTools*
+
+# Autogenerated Jetbrains Rider plugin
+/[Aa]ssets/Plugins/Editor/JetBrains*
+
+# Visual Studio cache directory
+.vs/
+
+# Gradle cache directory
+.gradle/
+
+# Autogenerated VS/MD/Consulo solution and project files
+ExportedObj/
+.consulo/
+*.csproj
+*.unityproj
+*.sln
+*.suo
+*.tmp
+*.user
+*.userprefs
+*.pidb
+*.booproj
+*.svd
+*.pdb
+*.mdb
+*.opendb
+*.VC.db
+
+# Unity3D generated meta files
+*.pidb.meta
+*.pdb.meta
+*.mdb.meta
+
+# Unity3D generated file on crash reports
+sysinfo.txt
+
+# Builds
+*.apk
+*.aab
+*.unitypackage
+
+# Crashlytics generated file
+crashlytics-build.properties
+
+# Packed Addressables
+/[Aa]ssets/[Aa]ddressable[Aa]ssets[Dd]ata/*/*.bin*
+
+# Temporary auto-generated Android Assets
+/[Aa]ssets/[Ss]treamingAssets/aa.meta
+/[Aa]ssets/[Ss]treamingAssets/aa/*

.vsconfig

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+{
+  "version": "1.0",
+  "components": [ 
+    "Microsoft.VisualStudio.Workload.ManagedGame"
+  ]
+} 

Assets/Editor.meta

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Assets/Editor/TurtleEditor.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEditor;
+using UnityEngine;
+[CustomEditor(typeof(TurtleLSystem),true)]
+public class TurtleEditor : Editor
+{
+    TurtleLSystem turtleLSystem;
+
+
+    public override void OnInspectorGUI() {
+        DrawDefaultInspector();
+
+        if (GUILayout.Button("Load file")) {
+            turtleLSystem.loadFile();
+        }
+
+        if (GUILayout.Button("Evaluate")) {
+            turtleLSystem.evaluateAndPresent();
+        }
+
+    }
+    void OnEnable() {
+        turtleLSystem = (TurtleLSystem)target;
+        Tools.hidden = true;
+    }
+
+    void OnDisable() {
+        Tools.hidden = false;
+    }
+}

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Assets/LSystem.meta

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Assets/LSystem/Anabaena.txt

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+#axiom
+L
+#rules
+L->lR
+R->Lr
+l->L
+r->R
+#end rules

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Assets/LSystem/Context1.txt

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+#axiom
+BAAAAAAAA
+#rules
+B<A -> B
+B -> A
+#end rules

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Assets/LSystem/Context2.txt

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+#ignore + -
+#axiom
+C(5,5)AA++AA-AAAAD(0)
+#rules
+C(a,b) > A : b<5 -> C(a,b+1)
+C(a,b) > A : b>=5 ; a>0 -> C(a-1,0)
+C(a,b) < A : b>=5 ; a>0 -> B
+B<D(a) -> D(a+1)
+B<A -> B
+B -> A

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Assets/LSystem/Koch.txt

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+#axiom
+
+#rules
+
+#end rules

Assets/LSystem/Koch.txt.meta

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Assets/LSystem/Plant.txt

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+#axiom
+X
+#rules
+X->F[+X]F[-X]+X
+F->FF
+#end rules

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Assets/LSystem/SampleLSystem.txt

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+#axiom
+A
+#rules
+#komentarz
+#podstawowe przekształcenie
+X-> AX
+# instrukcja z rozgałęzieniem
+Y->A[A]A
+#parametryczne symbola są rozpoznawane po literze i liczbie argumentów czyli B, B(0) i B(0,0) to różne symbole
+#w regułach dla parametrycznych symboli w poprzedniku definiuje się nazwę parametru. ta instrukcja zamieni C(1) na C(1.1) a C(2) na C(2.1)
+C(a) -> C(a+0.1)
+# ta instrukcja wykona się, jeżeli a>1 i a<2 przecinek oznacza iloczyn logiczny
+B(a) : a>1,a<2 -> C(a)B(0)
+# ta instrukcja wykona się, jeżeli poprzednia się nie wykonała i gdy a<=1
+B(a) : a<=1 -> B(2*a)
+# ta instrukcja się wykona, jeżeli poprzednie 2 się nie wykonają
+B(a) -> B(0)
+# instrukcja się wykona, jeżeli następnikiem A jest B(a) i a>0
+A > B(a) : a>0 -> B(a)[A]
+
+# instrukcja się wykona, jeżeli poprzednikiem A jest B(a) i a>0 (i jeżeli poprzednia się nie wykonała)
+B(a) < A  a>0 -> B(a)[A]
+# instrukcja się wykona, jeżeli poprzednikiem A jest B(a), następnikiem jest C(b) oraz a+b>0 (i jeżeli poprzednia się nie wykonała)
+B(a) < A > C(b) a+b>0 -> CC
+
+# wykona się jedna z trzech opcji z wagami odpowiednio 0.2, 0.6 i 0.3 - wagi nie muszą się sumować do 1. można stochastyczność łączyć z powyższymi rozszerzeniami.
+C(a) -> #stochastic
+p=0.2 AB(1)
+p=0.6 B(1)A
+p=0.3 AA
+#stochastic end
+#rules end

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Assets/LSystem/Sierpinski.txt

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+#axiom
+L
+#rules
+L->R+L+R
+R->L-R-L
+#end rules

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Assets/LSystem/VanIterson.txt

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+#axiom
+XA
+#rules
+A -> [&(90)f(0.5)S]f(0.0353)/(137.5)A
+#end rules

Assets/LSystem/VanIterson.txt.meta

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Assets/LSystem/cw2.txt

@@ -0,0 +1,17 @@
+#axiom
+S(0)
+#rules
+
+#Zadanie 1 i 2
+#Przy lekkiej zmianie kąta bardzo mocno zmienia się ułożenie nasion
+#S(n) -> S(n+1)[+(n*137.4)f(0.01*n^0.75)B]
+#S(n) -> S(n+1)[+(n*137.5)f(0.01*n^0.75)B]
+#S(n) -> S(n+1)[+(n*137.6)f(0.01*n^0.75)B]
+
+#Zadanie 3
+S(n) : n<150 -> S(n+1)[+(n*137.5)f(0.01*n^0.65)B]
+S(n) : n<400 -> S(n+1)[+(n*137.5)f(0.01*n^0.65)Y]
+S(n) : n<625 -> S(n+1)[+(n*137.5)f(0.01*n^0.65)O]
+S(n) : n<=650 -> S(n+1)[+(n*137.5)f(0.01*n^0.65)P]
+
+#end rules

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Assets/LSystem/stochastic.txt

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+#axiom
+B
+#rules
+B -> #stochastic
+p=3 FB
+p=1 [+FB]FB
+p=1 [-FB]FB
+p=1 F
+#stochastic end
+#rules end

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Assets/LSystem/sygnal.txt

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+#ignore + -
+#axiom
+C(5,5)A+A+AA-A-AA-AD(0)
+#rules
+C(a,b) > A : b<5 -> C(a,b+1)
+C(a,b) > A : b>=5 -> C(a-1,0)
+B(1)<D(a) -> D(a+1)
+B(a)<A -> B(a)
+B(a) -> A
+#end rules

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Assets/Scenes/LSystemFromFile.unity.meta

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Assets/Scripts.meta

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Assets/Scripts/AnabaenaTurtle.cs

@@ -0,0 +1,29 @@
+using System.Collections;
+using System.Collections.Generic;
+using System.IO;
+using UnityEditor;
+using UnityEngine;
+using ConsoleLSystem;
+using System;
+
+public class AnabaenaTurtle : TurtleLSystem {
+
+    protected override void initLiteralInterpretation() {
+
+        turtleInterpretation = new Dictionary<string, Func<float[], Tuple<GameObject, Matrix4x4>>>();
+        //turtleInterpretation
+        //loading required objects 
+        var path = "Assets/Models/{0}.fbx";
+        var bigL = (GameObject)AssetDatabase.LoadAssetAtPath(String.Format(path, "bigL"), typeof(GameObject));
+        var bigR = (GameObject)AssetDatabase.LoadAssetAtPath(String.Format(path, "bigR"), typeof(GameObject));
+        var l = (GameObject)AssetDatabase.LoadAssetAtPath(String.Format(path, "l"), typeof(GameObject));
+        var r = (GameObject)AssetDatabase.LoadAssetAtPath(String.Format(path, "r"), typeof(GameObject));
+
+        //creating functions that are used for interpretation
+        turtleInterpretation.Add("l", (float[] args) => new Tuple<GameObject, Matrix4x4>(l, Matrix4x4.Translate(new Vector3(0.1f, 0, 0)) * Matrix4x4.Scale(new Vector3(0.1f, 0.1f, 0.1f))));
+        turtleInterpretation.Add("r", (float[] args) => new Tuple<GameObject, Matrix4x4>(r, Matrix4x4.Translate(new Vector3(0.1f, 0, 0)) * Matrix4x4.Scale(new Vector3(0.1f, 0.1f, 0.1f))));
+        turtleInterpretation.Add("L", (float[] args) => new Tuple<GameObject, Matrix4x4>(bigL, Matrix4x4.Translate(new Vector3(0.1f, 0, 0)) * Matrix4x4.Scale(new Vector3(0.1f, 0.1f, 0.1f))));
+        turtleInterpretation.Add("R", (float[] args) => new Tuple<GameObject, Matrix4x4>(bigR, Matrix4x4.Translate(new Vector3(0.1f, 0, 0)) * Matrix4x4.Scale(new Vector3(0.1f, 0.1f, 0.1f))));
+    }
+}
+    

Assets/Scripts/AnabaenaTurtle.cs.meta

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Assets/Scripts/ContextTurtle.cs

@@ -0,0 +1,29 @@
+using System.Collections;
+using System.Collections.Generic;
+using System.IO;
+using UnityEditor;
+using UnityEngine;
+using ConsoleLSystem;
+using System;
+
+public class ContextTurtle : TurtleLSystem {
+
+    protected override void initLiteralInterpretation() {
+
+        turtleInterpretation = new Dictionary<string, Func<float[], Tuple<GameObject, Matrix4x4>>>();
+        //turtleInterpretation
+        //loading required objects 
+        var path = "Assets/Models/{0}.fbx";
+        var bigL = (GameObject)AssetDatabase.LoadAssetAtPath(String.Format(path, "bigL"), typeof(GameObject));
+        var bigR = (GameObject)AssetDatabase.LoadAssetAtPath(String.Format(path, "bigR"), typeof(GameObject));
+        var l = (GameObject)AssetDatabase.LoadAssetAtPath(String.Format(path, "l"), typeof(GameObject));
+        var r = (GameObject)AssetDatabase.LoadAssetAtPath(String.Format(path, "r"), typeof(GameObject));
+
+        //creating functions that are used for interpretation
+        turtleInterpretation.Add("A", (float[] args) => new Tuple<GameObject, Matrix4x4>(l, Matrix4x4.Translate(new Vector3(0.1f, 0, 0)) * Matrix4x4.Scale(new Vector3(0.1f, 0.1f, 0.1f))));
+        turtleInterpretation.Add("B", (float[] args) => new Tuple<GameObject, Matrix4x4>(r, Matrix4x4.Translate(new Vector3(0.1f, 0, 0)) * Matrix4x4.Scale(new Vector3(0.1f, 0.1f, 0.1f))));
+        turtleInterpretation.Add("D", (float[] args) => new Tuple<GameObject, Matrix4x4>(bigR, Matrix4x4.Translate(new Vector3(0.1f, 0, 0)) * Matrix4x4.Scale(new Vector3(0.1f, 0.1f * (args[0] * 0.2f + 0.01f), 0.1f))));
+        turtleInterpretation.Add("C", (float[] args) => new Tuple<GameObject, Matrix4x4>(bigR, Matrix4x4.Translate(new Vector3(0.1f, 0, 0)) * Matrix4x4.Scale(new Vector3(0.1f, 0.1f * (args[0] * 0.2f + 0.01f), 0.1f))));
+    }
+}
+    

Assets/Scripts/ContextTurtle.cs.meta

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Assets/Scripts/LSystem.meta

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+fileFormatVersion: 2
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Assets/Scripts/LSystem/LSystemParser.cs

@@ -0,0 +1,312 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Text.RegularExpressions;
+
+
+//TODO add parsing for more than single letter
+
+namespace ConsoleLSystem {
+    abstract public class LSystemGeneralWordBuilder {
+        abstract public LSystemNode createLSystemNode(string name, int values_number);
+        abstract public void fillArguments(LSystemNode node, string[] arguments_strings);
+    }
+    public class LSystemWordBuilder : LSystemGeneralWordBuilder {
+        public override LSystemNode createLSystemNode(string name, int values_number) {
+            return new LSystemNode(new LSystemNodeLiteral(name, values_number));
+        }
+
+
+        public override void fillArguments(LSystemNode node, string[] arguments_strings) {
+            for (int i = 0; i < arguments_strings.Length; i++) {
+                node.literal.values[i] = float.Parse(arguments_strings[i], NumberStyles.Any, CultureInfo.InvariantCulture);
+            }
+        }
+    }
+
+    public class LSystemWordGeneratorBuilder : LSystemGeneralWordBuilder {
+        public Dictionary<string, int> variableIndex { get;}
+        public LSystemWordGeneratorBuilder(Dictionary<string,int> variable_index) {
+            this.variableIndex = variable_index;
+        }
+        public override LSystemNode createLSystemNode(string name, int values_number) {
+            return new LSystemNodeGenerator(name, values_number);
+        }
+
+        public override void fillArguments(LSystemNode node, string[] arguments_strings) {
+            MathExpression[] expressions = arguments_strings.Select(argument => new MathExpression(variableIndex, argument)).ToArray();
+            LSystemNodeGenerator ng = (LSystemNodeGenerator)node;
+            ng.fillArguments(expressions);
+        }
+        
+    }
+    public class LSystemFileParser {
+        //LSystemWordParser wordParser;
+        //LSystemRulesParser ruleParser;
+
+        //public LSystemFileParser(LSystemWordParser wordParser, LSystemRulesParser ruleParser) {
+        //    this.wordParser = wordParser;
+        //    this.ruleParser = ruleParser;
+        //}
+        public static int countParenthesisEnd(string line,char opening_char, char closing_char) {
+            var parenthesises_number = 1;
+            var length = -1;
+            while (parenthesises_number > 0) {
+                length++;
+                var c = line[1 + length];
+                if (c == opening_char) {
+                    parenthesises_number++;
+                }
+                if (c == closing_char) {
+                    parenthesises_number--;
+                }
+            }
+            return length;
+        }
+        public static bool parenthesisCheck(string line) {
+            var parenthesises_number = 0;
+            var brackets_number = 0;
+            foreach (var s in line) {
+                if (s == '(') {
+                    parenthesises_number++;
+                }
+                if (s == ')') {
+                    parenthesises_number--;
+                }
+                if (s == '[') {
+                    brackets_number++;
+                }
+                if (s == ']') {
+                    brackets_number--;
+                }
+                if (brackets_number<0 || parenthesises_number < 0) {
+                    return false;
+                }
+
+            }
+            return (brackets_number == 0 && parenthesises_number == 0);
+        }
+
+        public static LSystemNode parseWord(string line, LSystemGeneralWordBuilder builder) {
+            var read_characters = 0;
+            LSystemNode node;
+            if (line[0] == '[') {
+                node = builder.createLSystemNode("", 0);
+            }
+            else {
+                var literal_name = line.Substring(0, 1);
+                if (line.Length>1 && line[1] == '(') {
+                    var length = countParenthesisEnd(line.Substring(1), '(', ')');
+                    var values_string = line.Substring(2, length).Split(',');
+                    node = builder.createLSystemNode(literal_name, values_string.Length);
+
+                    builder.fillArguments(node, values_string);
+                    //Leter and: (, )
+                    read_characters += length + 3;
+                    
+                }
+                else {
+                    read_characters += 1;
+                    node = builder.createLSystemNode(line.Substring(0,1),0);
+                }
+            }
+            while (line.Length > read_characters && line[read_characters] == '[') {
+                 
+                var brackets_number = 1;
+                var length = countParenthesisEnd(line.Substring(read_characters), '[', ']');
+                var child_node = parseWord(line.Substring(read_characters + 1, length),builder);
+                read_characters += length + 2;
+                child_node.parent = node;
+                node.children.Add(child_node);
+            }
+            if (read_characters < line.Length) {
+                var child_node = parseWord(line.Substring(read_characters),builder);
+                child_node.parent = node;
+                node.mainChild = (child_node);
+            }
+            return node;
+        }
+
+        public static LSystemNodeLiteralVariable parsePredecesor(string line) {
+            var name = line.Substring(0, 1);
+            var varable_index = new Dictionary<string, int>();
+            if (line.Length > 1) {
+                foreach (var i in line.Substring(2, line.Length - 3).Split(',').Select((name, Index) => new { name, Index })) {
+                    varable_index.Add(i.name, i.Index);
+                };
+            }
+            return new LSystemNodeLiteralVariable(name, varable_index.Count, varable_index);
+        }
+        //private static String[] parseIgnore(string line) {
+        //    var items = line.Trim().Split(' ');
+        //    var resut = List 
+
+        //}
+
+        public static LSystemEvaluator parseLSystem(StreamReader sr) {
+            string line;
+            int line_number = 0;
+            var ignored = new String[0];
+            LSystemNode axiom = null;
+            List<LSystemRule> rules = null;
+            while ((line = sr.ReadLine()) != null) {
+                line_number++;
+                if (line.Trim() == "#axiom") {
+                    line = sr.ReadLine();
+                    if (!parenthesisCheck(line)) {
+                        throw new Exception(String.Format("In line {0} invalid syntax", line_number));
+                    }
+                    axiom = parseWord(line,new LSystemWordBuilder());
+                }
+                if (line.Trim().Split(' ')[0].Trim() == "#ignore") {
+                    ignored = line.Trim().Split(' ').Where(x=> x!= "#ignore" && x.Length>0).Select(x => x.Trim()).ToArray();
+                }
+                if (line.Trim() == "#rules") {
+                    rules = parseLSystemRules(sr);
+                }
+
+            }
+            return new LSystemEvaluator(axiom, rules, ignored);
+        }
+
+        private static List<LSystemRule> parseLSystemRules(StreamReader sr) {
+            List<LSystemRule> rules = new List<LSystemRule>();
+            Regex separator = new Regex(@"-(\d*\.?\d*){1}>");
+            Regex weight_regex = new Regex(@"p=(\d+\.?\d*){1}");
+            string line;
+            while ((line = sr.ReadLine()) != null && line.Trim() != "#rules end") {
+                try {
+                    if (line.Length == 0 || line[0] == '#') {
+                        continue;
+                    }
+                    MathExpressionComparison[] conditions = new MathExpressionComparison[0];
+                    var split = separator.Match(line);
+                    var line_parts = line.Split(new string[] { split.Value }, StringSplitOptions.None);
+                    // check conditions;
+                    //parse predecesor
+                    var _t = line_parts[0].Split(':');
+                    var predecesor_string = _t[0];
+                    LSystemNodeLiteralVariable predecesor;
+                    LSystemContext context;
+                    //check if contains < or >
+
+                    // check context 
+                    getPredecesorContext(predecesor_string, out predecesor, out context);
+
+                    if (_t.Length > 1) {
+                        conditions = _t[1].Trim().Split(';').Select(text => MathExpressionComparasionParser.parse(predecesor.variableIndex, text.Trim())).ToArray();
+                    }
+                    // tochastic rule parsing
+                    var sucsessor_string = line_parts[1];
+                    var probabilities_list = new List<float>();
+                    var consequents_list = new List<LSystemNodeGenerator>();
+                    if (sucsessor_string.Trim() == "#stochastic") {
+                        while ((line = sr.ReadLine()) != null && line.Trim() != "#stochastic end") {
+                            if (line[0] == '#') {
+                                continue;
+                            }
+                            var weight_string = weight_regex.Match(line);
+                            var weight = float.Parse(weight_string.Value.Substring(2), NumberStyles.Any, CultureInfo.InvariantCulture);
+                            probabilities_list.Add(weight);
+
+                            var prob_len = weight_string.Value.Length;
+                            consequents_list.Add((LSystemNodeGenerator)parseWord(line.Substring(prob_len).Trim(), new LSystemWordGeneratorBuilder(predecesor.variableIndex)));
+                        }
+                    }
+                    else {
+                        consequents_list.Add((LSystemNodeGenerator)parseWord(sucsessor_string.Trim(), new LSystemWordGeneratorBuilder(predecesor.variableIndex)));
+                    }
+                    //context 
+                    if (context != null) {
+                        if (consequents_list.Count > 1) {
+                            rules.Add(new LSystemRuleParametricStochasticContext(predecesor, conditions, consequents_list.ToArray(), probabilities_list.ToArray(), context));
+                        }
+                        else {
+                            rules.Add(new LSystemRuleParametricStochasticContext(predecesor, conditions, consequents_list[0], context));
+                        }
+                    }
+                    else {
+                        if (consequents_list.Count > 1) {
+                            rules.Add(new LSystemRuleParametricStochastic(predecesor, conditions, consequents_list.ToArray(), probabilities_list.ToArray()));
+                        }
+                        else {
+                            rules.Add(new LSystemRuleParametric(predecesor, conditions, consequents_list[0]));
+                        }
+                    }
+                    //var conditions = parts[0];
+                    //var result 
+                }
+                catch (Exception e) {
+                    sr.Close();
+                    throw new Exception(String.Format("error in {0} with a message \n {1}", line,e.Message));
+                }
+            }
+            return rules;
+        }
+
+        private static void getPredecesorContext(string predecesor_string, out LSystemNodeLiteralVariable predecesor, out LSystemContext context) {
+            string partent_context_str = null;
+            string child_context_str = null;
+            string mid_context_str = null;
+            int mid_start = 0;
+
+            for (int i = 0; i < predecesor_string.Length; i++) {
+                if (predecesor_string[i] == '<' && partent_context_str == null) {
+                    partent_context_str = predecesor_string.Substring(0, i).Trim();
+                    mid_start = i+1;
+                    //Console.WriteLine(i);
+                }
+                if (predecesor_string[i] == '>' && child_context_str == null) {
+                    child_context_str = predecesor_string.Substring(i + 1).Trim();
+                    mid_context_str = predecesor_string.Substring(mid_start, i - mid_start).Trim();
+                    //Console.WriteLine(i);
+                }
+
+            }
+            if (mid_context_str == null) {
+                mid_context_str = predecesor_string.Substring(mid_start).Trim();
+            }
+            LSystemNodeLiteralVariable parent = null;
+            LSystemNodeLiteralVariable child = null;
+            predecesor = LSystemFileParser.parsePredecesor(mid_context_str);
+            if (partent_context_str != null) {
+                parent = LSystemFileParser.parsePredecesor(partent_context_str);
+                foreach (KeyValuePair<string, int> kvp in new Dictionary<string, int>(predecesor.variableIndex)) {
+                    //textBox3.Text += ("Key = {0}, Value = {1}", kvp.Key, kvp.Value);
+                    predecesor.variableIndex[kvp.Key] = kvp.Value + parent.variableIndex.Count;
+                }
+                foreach (KeyValuePair<string, int> kvp in parent.variableIndex) {
+                    //textBox3.Text += ("Key = {0}, Value = {1}", kvp.Key, kvp.Value);
+                    predecesor.variableIndex.Add(kvp.Key, kvp.Value);
+                }
+            }
+            if (child_context_str != null) {
+                int size = predecesor.variableIndex.Count;
+                child = LSystemFileParser.parsePredecesor(child_context_str);
+                foreach (KeyValuePair<string, int> kvp in child.variableIndex) {
+                    //textBox3.Text += ("Key = {0}, Value = {1}", kvp.Key, kvp.Value);
+                    predecesor.variableIndex.Add(kvp.Key, kvp.Value + size);
+                }
+            }
+            if (child_context_str != null) {
+                if (partent_context_str != null) {
+                    context = new LSystemContext(parent, child);
+                }
+                else {
+                    context = new LSystemContext();
+                    context.setOnlySucceeding(child);
+                }
+            }
+            else if (partent_context_str != null) {
+                context = new LSystemContext();
+                context.setOnlyPreceding(parent);
+            }
+            else {
+                context = null;
+            }
+        }
+    }
+}

Assets/Scripts/LSystem/LSystemParser.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 5d9ea0d39208315468053b0ae8bb3e95
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/LSystem/LSystemRule.cs

@@ -0,0 +1,313 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace ConsoleLSystem {
+    public class LSystemNodeLiteralVariable : LSystemNodeLiteral {
+        public Dictionary<string, int> variableIndex { get; }
+
+        public LSystemNodeLiteralVariable(string name, int values_number, Dictionary<string, int> variableIndex) : base(name, values_number) {
+            this.variableIndex = variableIndex;
+        }
+
+    }
+    public class LSystemNodeGenerator : LSystemNode {
+        MathExpression[] math_expressions;
+
+        public LSystemNodeGenerator(string name, int arguments) : base(new LSystemNodeLiteral(name, arguments)) {
+        }
+        public void fillArguments(MathExpression[] math_expressions) {
+            this.math_expressions = math_expressions;
+        }
+        public LSystemNode eval(float[] values) {
+            var literal = new LSystemNodeLiteral(this.literal.name, this.literal.values_number);
+            for (int i = 0; i < literal.values_number; i++) {
+                literal.values[i] = math_expressions[i].eval(values);
+            }
+            var result = new LSystemNode(literal);
+            foreach (LSystemNodeGenerator child in children) {
+                var _child = child.eval(values);
+                _child.parent = result;
+                result.children.Add(_child);
+
+            }
+            if (mainChild != null) {
+                var _mainChild = ((LSystemNodeGenerator)mainChild).eval(values);
+                _mainChild.parent = result;
+                result.mainChild = _mainChild;
+            }
+            else {
+                result.mainChild = null;
+            }
+            return result;
+        }
+
+    }
+    abstract public class LSystemRule {
+        abstract public bool is_aplicable(LSystemNode processed_node, String[] ignored);
+        abstract public LSystemNode rewrite(LSystemNode processed_node, String[] ignored);
+    }
+
+    public class LSystemRuleBasic : LSystemRule {
+        LSystemNodeLiteral input;// { get; }
+        LSystemNode output;
+
+        public LSystemRuleBasic(LSystemNodeLiteral input, LSystemNode output) {
+            this.input = input;
+            this.output = output;
+        }
+
+        override public bool is_aplicable(LSystemNode processed_node, String[] ignored) {
+            if (processed_node.literal == input) {
+                return true;
+            }
+            else {
+                return false;
+            }
+        }
+        override public LSystemNode rewrite(LSystemNode processed_node, String[] ignored) {
+            if (is_aplicable(processed_node, ignored)) {
+                return output.deep_copy();
+            }
+            else {
+                return new LSystemNode(processed_node.literal);
+            }
+        }
+    }
+
+    public class LSystemRuleParametric : LSystemRule {
+        LSystemNodeLiteralVariable predecesor;// { get; }
+        LSystemNodeGenerator consequent;
+        MathExpressionComparison[] conditions;
+
+        public LSystemRuleParametric(LSystemNodeLiteralVariable predecesor, MathExpressionComparison[] conditions, LSystemNodeGenerator consequent) {
+            this.predecesor = predecesor;
+            this.consequent = consequent;
+            this.conditions = conditions;
+        }
+
+        public override bool is_aplicable(LSystemNode processed_node, String[] ignored) {
+            if (processed_node.literal.name != predecesor.name || processed_node.literal.values_number != predecesor.values_number) {
+                return false;
+            }
+            foreach (var condition in conditions) {
+                if (!condition.eval(processed_node.literal.values)) {
+                    return false;
+                }
+            }
+            return true;
+        }
+
+        public override LSystemNode rewrite(LSystemNode processed_node, String[] ignored) {
+            if (is_aplicable(processed_node, ignored)) {
+                return consequent.eval(processed_node.literal.values);
+            }
+            else {
+                return new LSystemNode(processed_node.literal);
+            }
+        }
+    }
+
+    public class LSystemRuleParametricStochastic : LSystemRule {
+        protected LSystemNodeLiteralVariable predecesor;// { get; }
+        protected LSystemNodeGenerator[] consequents;
+        protected float[] probabilities;
+        protected MathExpressionComparison[] conditions;
+        protected Random random;
+
+        public LSystemRuleParametricStochastic(LSystemNodeLiteralVariable predecesor, MathExpressionComparison[] conditions, LSystemNodeGenerator[] consequents, float[] probabilities) {
+            this.predecesor = predecesor;
+            this.consequents = consequents;
+            this.conditions = conditions;
+            float probabilities_sum = 0;
+            foreach (var probability in probabilities) { probabilities_sum += probability; }
+            float acumulator = 0;
+            this.probabilities = new float[consequents.Length];
+            for (int i = 0; i < consequents.Length; i++) {
+                var probability = probabilities[i] / probabilities_sum;
+                this.probabilities[i] = probability + acumulator;
+                acumulator += probability;
+            }
+            random = new Random();
+
+        }
+        public LSystemRuleParametricStochastic(LSystemNodeLiteralVariable predecesor, MathExpressionComparison[] conditions, LSystemNodeGenerator consequent) {
+            this.predecesor = predecesor;
+            this.consequents = new LSystemNodeGenerator[] { consequent };
+            this.conditions = conditions;
+            float probabilities_sum = 0;
+            probabilities = new float[1] { 1 };
+            random = new Random();
+
+        }
+        public override bool is_aplicable(LSystemNode processed_node, String[] ignored) {
+            if (processed_node.literal.name != predecesor.name || processed_node.literal.values_number != predecesor.values_number) {
+                return false;
+            }
+            foreach (var condition in conditions) {
+                if (!condition.eval(processed_node.literal.values)) {
+                    return false;
+                }
+            }
+            return true;
+        }
+
+        public override LSystemNode rewrite(LSystemNode processed_node, String[] ignored) {
+            var result = random.NextDouble();
+            int consequent_index = 0;
+            for (int i = 0; i < probabilities.Length; i++) {
+                if (result < probabilities[i]) {
+                    consequent_index = i;
+                    break;
+                }
+            }
+            if (is_aplicable(processed_node, ignored)) {
+                return consequents[consequent_index].eval(processed_node.literal.values);
+            }
+            else {
+                return new LSystemNode(processed_node.literal);
+            }
+        }
+    }
+    public class LSystemContext {
+        public LSystemNodeLiteral parent { get; set; }
+        public LSystemNodeLiteral child { get; set; }
+        public LSystemNodeLiteral mid { get; set; }
+        bool isPreceding = false;
+        bool isSucceeding = false;
+
+        public LSystemContext(LSystemNodeLiteral parent, LSystemNodeLiteral child) {
+            this.parent = parent;
+            this.child = child;
+            this.isPreceding = true;
+            this.isSucceeding = true;
+        }
+        public LSystemContext() {
+
+        }
+        public void setOnlyPreceding(LSystemNodeLiteral parent) {
+            this.parent = parent;
+            this.mid = mid;
+            this.isPreceding = true;
+            this.isSucceeding = false;
+        }
+        public void setOnlySucceeding(LSystemNodeLiteral child) {
+            this.child = child;
+            this.isPreceding = false;
+            this.isSucceeding = true;
+        }
+        public bool isAplicable(LSystemNode node, String[] ignored, out float[] variables) {
+            var variables_list = new List<float>();
+            var currentParent = node.parent;
+            while (ignored.Contains(currentParent.literal.name)) {
+                currentParent = currentParent.parent;
+            }
+            if (isPreceding && parent != currentParent.literal) {
+                variables = new float[0];
+                return false;
+            }
+            if (isPreceding) {
+                variables_list.AddRange(currentParent.literal.values);
+            }
+            variables_list.AddRange(node.literal.values);
+            if (isSucceeding) {
+                var result = false;
+                LSystemNodeLiteral childLiteral;
+                Queue<LSystemNode> ignoredChildren = new Queue<LSystemNode>();
+                foreach(var child in node.getAllChildren()) {
+                    if (ignored.Contains(child.literal.name)) {
+                        ignoredChildren.Enqueue(child);
+                    }
+                    if (child.literal == this.child) {
+                        childLiteral = child.literal;
+                        result = true;
+                        variables_list.AddRange(child.literal.values);
+                        break;
+                    }
+                }
+                while (!result && ignoredChildren.Count>0) {
+                    var ignoredChild = ignoredChildren.Dequeue();
+                    foreach (var child in ignoredChild.getAllChildren()) {
+                        if (ignored.Contains(child.literal.name)) {
+                            ignoredChildren.Enqueue(child);
+                        }
+                        if (child.literal == this.child) {
+                            childLiteral = child.literal;
+                            result = true;
+                            variables_list.AddRange(child.literal.values);
+                            break;
+                        }
+                    }
+                }
+                if (!result) {
+                    variables = new float[0];
+                    return false;
+                }
+            }
+            variables = variables_list.ToArray();
+            return true;
+
+        }
+
+    }
+
+    public class LSystemRuleParametricStochasticContext : LSystemRuleParametricStochastic {
+        LSystemContext context;
+        public LSystemRuleParametricStochasticContext(LSystemNodeLiteralVariable predecesor, MathExpressionComparison[] conditions, LSystemNodeGenerator[] consequents, float[] probabilities, LSystemContext context) : base(predecesor, conditions, consequents, probabilities) {
+            this.context = context;
+        }
+        public LSystemRuleParametricStochasticContext(LSystemNodeLiteralVariable predecesor, MathExpressionComparison[] conditions, LSystemNodeGenerator consequent, LSystemContext context) : base(predecesor, conditions, consequent) {
+            this.context = context;
+        }
+        public override bool is_aplicable(LSystemNode processed_node,String[] ignored) {
+            if (processed_node.literal.name != predecesor.name || processed_node.literal.values_number != predecesor.values_number) {
+                return false;
+            }
+            var variables = new float[0];
+            if (!context.isAplicable(processed_node, ignored, out variables)) {
+                return false;
+            }
+            foreach (var condition in conditions) {
+                if (!condition.eval(variables)) {
+                    return false;
+                }
+            }
+            return true;
+        }
+        bool is_aplicable(LSystemNode processed_node, String[] ignored, out float[] variables) {
+            variables = new float[0];
+            if (processed_node.literal.name != predecesor.name || processed_node.literal.values_number != predecesor.values_number) {
+                return false;
+            }
+            if (!context.isAplicable(processed_node, ignored, out variables)) {
+                return false;
+            }
+            foreach (var condition in conditions) {
+                if (!condition.eval(variables)) {
+                    return false;
+                }
+            }
+            return true;
+        }
+
+        public override LSystemNode rewrite(LSystemNode processed_node, String[] ignored) {
+            var result = random.NextDouble();
+            int consequent_index = 0;
+            for (int i = 0; i < probabilities.Length; i++) {
+                if (result < probabilities[i]) {
+                    consequent_index = i;
+                    break;
+                }
+            }
+            float[] variables;
+            if (is_aplicable(processed_node, ignored, out variables)) {
+                return consequents[consequent_index].eval(variables);
+            }
+            else {
+                return new LSystemNode(processed_node.literal);
+            }
+        }
+
+    }
+}

Assets/Scripts/LSystem/LSystemRule.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: fbf81cc8f22e1b040aa2f1b218391989
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/LSystem/MathExpression.cs

@@ -0,0 +1,210 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+
+namespace ConsoleLSystem {
+    public class MathExpressionComparison{
+        MathExpression leftSide;
+        MathExpression rightSide;
+        Func<float, float,bool> comparisonFunction;
+
+        public MathExpressionComparison(MathExpression leftSide, MathExpression rightSide, Func<float, float, bool> comparisonFunction) {
+            this.leftSide = leftSide;
+            this.rightSide = rightSide;
+            this.comparisonFunction = comparisonFunction;
+        }
+        public bool eval(float[] variables) {
+            return comparisonFunction(leftSide.eval(variables), rightSide.eval(variables));
+        }
+
+
+    }
+    public class MathExpressionNode {
+        Func<float[], float[], float> function;
+        MathExpressionNode[] childNodes;
+
+        public MathExpressionNode(Func<float[], float[], float> function, MathExpressionNode[] childNodes) {
+            this.function = function;
+            this.childNodes = childNodes;
+        }
+
+        public float eval(float[] variables) {
+            var x = childNodes.Select(node => node.eval(variables)).ToArray();
+            return function(x, variables);
+        }
+    }
+    public class MathExpression {
+        private static Random random = new Random();
+
+        private static Dictionary<char, int> expression_hierarchy = new Dictionary<char, int>{
+            {'^', 4},
+            {'*', 3},
+            {'/', 3},
+            {'+', 1},
+            {'-', 1},
+        };
+        MathExpressionNode rootNode;
+        public float eval(float [] variables) {
+            return rootNode.eval(variables);
+        }
+        private static float negate(float[] children, float[] variables) {
+            return -children[0];
+        }
+        private static float mulitply(float[] children, float[] variables) {
+            return children[0] * children[1];
+        }
+        private static float power(float[] children, float[] variables) {
+            return (float)Math.Pow(children[0],children[1]);
+        }
+        private static float divide(float[] children, float[] variables) {
+            return children[0] / children[1];
+        }
+        private static float add(float[] children, float[] variables) {
+            return children[0] + children[1];
+        }
+        private static float subtract(float[] children, float[] variables) {
+            return children[0] - children[1];
+        }
+
+        //private MathExpressionNode parse(Dictionary<string, int> variableNames, string expression_string) {
+
+
+        //    var read_characters = 0;
+        //    var node = new MathExpressionNode();
+        //    if (expression_string[0] == '(') {
+        //        var length = LSystemFileParser.countParenthesisEnd(expression_string, '(', ')');
+        //        if (length == expression_string.Length - 2) {
+        //            return parse(variableNames, expression_string.Substring(1, length));
+        //        }
+
+        //        var left_child_node = parse(variableNames, expression_string.Substring(1, length));
+        //        read_characters += length + 2;
+
+        //        node.function = getFunction(expression_string[read_characters]);
+        //        read_characters += 1;
+
+        //        if (expression_string[read_characters] == '(')
+        //    }
+
+
+
+        //}
+
+        private static MathExpressionNode parse(Dictionary<string, int> variableNames, string expression_string) {
+            expression_string = expression_string.Trim();
+            var expression_pos = -1;
+            var current_level = 1000;
+            for (int i = 0; i < expression_string.Length; i++) {
+                if (expression_string[i] == '(') {
+                    var length = LSystemFileParser.countParenthesisEnd(expression_string.Substring(i), '(', ')');
+                    if (length == expression_string.Length - 2) {
+                        return parse(variableNames, expression_string.Substring(1, length));
+                    }
+                    //skip parenthesis
+                    // if expression is covered in ( )
+                    if (i == 0 && length == expression_string.Length - 2) {
+                        return parse(variableNames, expression_string.Substring(1, length));
+                    }
+                    else {
+                        i += length + 1;
+                        continue;
+                    }
+                }
+                int new_level;
+                if (expression_hierarchy.TryGetValue(expression_string[i],out new_level)) {
+                    if (i>0 && !(i - 1 == expression_pos && expression_string[i] == '-')) {
+                        if (new_level <= current_level) {
+                            current_level = new_level;
+                            expression_pos = i;
+                        }
+                    }
+                }
+            }
+            if (expression_pos > 0) {
+                var left_node = parse(variableNames, expression_string.Substring(0, expression_pos));
+                var right_node = parse(variableNames, expression_string.Substring(expression_pos + 1));
+                MathExpressionNode[] child_nodes = { left_node, right_node };
+                switch (expression_string[expression_pos]) {
+                    case '*':
+                        return new MathExpressionNode(mulitply, child_nodes);
+                        break;
+                    case '/':
+                        return new MathExpressionNode(divide, child_nodes);
+                        break;
+                    case '+':
+                        return new MathExpressionNode(add, child_nodes);
+                        break;
+                    case '-':
+                        return new MathExpressionNode(subtract, child_nodes);
+                        break;
+                    case '^':
+                        return new MathExpressionNode(power, child_nodes);
+                        break;
+                    default:
+                        throw new Exception(String.Format("unknown operation {0} in {1}", expression_string[expression_pos], expression_string));
+                        break;
+                }
+            }
+            else if (expression_string[0] == '-') {
+                MathExpressionNode[] a = { parse(variableNames, expression_string.Substring(1)) };
+                return new MathExpressionNode(negate, a);
+            }
+            else {
+                int index;
+                if (expression_string == "RANDOM") {
+                    return new MathExpressionNode((float[] children, float[] arguments) => (float)random.NextDouble(), new MathExpressionNode[0]);
+                }
+                if (variableNames.TryGetValue(expression_string.Trim(),out index)){
+                    return new MathExpressionNode((float[] children, float[] arguments) => arguments[index], new MathExpressionNode[0]);
+                }
+                else {
+                    try {
+                        float value = float.Parse(expression_string, NumberStyles.Any, CultureInfo.InvariantCulture);
+                        return new MathExpressionNode((float[] children, float[] arguments) => value, new MathExpressionNode[0]);
+                    }
+                    catch (Exception) {
+
+                        throw new Exception(String.Format("can't parse ``{0}``. It's not a number nor a known variable", expression_string));
+                    }
+                }
+            }
+        }
+        public MathExpression(Dictionary<string,int> variableNames, string expression_string) {
+            rootNode = parse(variableNames, expression_string);
+        }
+    }
+    public class MathExpressionComparasionParser {
+        private static bool le(float a, float b) { return a < b; }
+        private static bool leq(float a, float b) { return a <= b; }
+        private static bool eq(float a, float b) { return a == b; }
+
+        public static MathExpressionComparison parse(Dictionary<string, int> variableNames, string expression_string) {
+            //var operations = new string[]{ "<=", ">=", "<", ">"};
+            if (expression_string.Contains("<=")) {
+                
+                var parts = expression_string.Split(new string[] { "<=" }, StringSplitOptions.None).Select(s => s.Trim()).ToArray();
+                return new MathExpressionComparison(new MathExpression(variableNames, parts[0]), new MathExpression(variableNames, parts[1]), leq);
+            }
+            if (expression_string.Contains(">=")) {
+                var parts = expression_string.Split(new string[] { ">=" }, StringSplitOptions.None).Select(s => s.Trim()).ToArray();
+                return new MathExpressionComparison(new MathExpression(variableNames, parts[1]), new MathExpression(variableNames, parts[0]), leq);
+            }
+            if (expression_string.Contains("==")) {
+                var parts = expression_string.Split(new string[] { "==" }, StringSplitOptions.None).Select(s => s.Trim()).ToArray();
+                return new MathExpressionComparison(new MathExpression(variableNames, parts[1]), new MathExpression(variableNames, parts[0]), eq);
+            }
+            if (expression_string.Contains("<")) {
+                var parts = expression_string.Split('<').Select(s => s.Trim()).ToArray();
+                return new MathExpressionComparison(new MathExpression(variableNames, parts[0]), new MathExpression(variableNames, parts[1]), le);
+            }
+            if (expression_string.Contains(">")) {
+                var parts = expression_string.Split('>').Select(s => s.Trim()).ToArray();
+                return new MathExpressionComparison(new MathExpression(variableNames, parts[1]), new MathExpression(variableNames, parts[0]), le);
+            }
+
+            throw new Exception(String.Format("comparison operation not recognized in {}", expression_string));
+        }
+    }
+}

Assets/Scripts/LSystem/MathExpression.cs.meta

@@ -0,0 +1,11 @@
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+guid: 9f4cd6c897dbc5741b23eee6d073826c
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/LSystem/Program.cs

@@ -0,0 +1,353 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Text.RegularExpressions;
+
+namespace ConsoleLSystem {
+    public class LSystemNodeLiteral {
+        public string name { get; }
+        public int values_number { get; }
+
+        public float[] values { get; set; }
+
+        public LSystemNodeLiteral(string name, int values_number) {
+            this.name = name;
+            this.values_number = values_number;
+            //in case it would be 0 
+            values = new float[values_number];
+        }
+        public LSystemNodeLiteral(LSystemNodeLiteral other) {
+            this.name = other.name;
+            this.values_number = other.values_number;
+            //in case it would be 0 
+            values = new float[this.values_number];
+            other.values.CopyTo(values, 0);
+        }
+
+        public static bool operator ==(LSystemNodeLiteral thisLiteral, LSystemNodeLiteral other) {
+            return thisLiteral.name == other.name && thisLiteral.values_number == other.values_number;
+        }
+        public static bool operator !=(LSystemNodeLiteral thisLiteral, LSystemNodeLiteral other) {
+            return !(thisLiteral.name == other.name && thisLiteral.values_number == other.values_number);
+        }
+
+        public override string ToString() {
+            if (values_number == 0) {
+                return name;
+            }
+            else {
+                StringBuilder sb = new StringBuilder(name, name.Length + values_number * 7 + 4);
+                sb.Append("(");
+                for (int i = 0; i < values_number; i++) {
+                    var v = values[i];
+                    sb.AppendFormat("{0:0.##}", v);
+                    if (i < values_number - 1) {
+                        sb.Append(",");
+                    }
+                }
+                sb.Append(")");
+                return sb.ToString();
+            }
+        }
+    }
+
+    public class LSystemNode {
+        public LSystemNodeLiteral literal { get; set; }
+        public List<LSystemNode> children { get; set; }
+        public LSystemNode mainChild { get; set; }
+
+        private LSystemNode _parent;
+        public LSystemNode parent {
+            get { if (_parent is null) { return new LSystemNode(new LSystemNodeLiteral(" _ ", 0)); }
+                else { return _parent; } }
+            set { _parent = value; } }
+
+        public LSystemNode(LSystemNodeLiteral nodeLiteral) {
+            literal = nodeLiteral;
+            children = new List<LSystemNode>();
+            mainChild = null;
+        }
+
+        public LSystemNode(LSystemNodeLiteral nodeLiteral, List<LSystemNode> children, LSystemNode mainChild) {
+            literal = nodeLiteral;
+            this.children = children;
+            this.mainChild = mainChild;
+        }
+        public LSystemNode(LSystemNodeLiteral nodeLiteral, List<LSystemNode> children) {
+            literal = nodeLiteral;
+            this.children = children;
+            this.mainChild = null;
+        }
+        public List<LSystemNode> getAllChildren() {
+            var result = new List<LSystemNode>(children);
+            if (mainChild != null){
+                result.Add(mainChild);
+            }
+            return result;
+        }
+
+        public LSystemNode deep_copy() {
+            if (children.Count() == 0 && mainChild == null) {
+                return new LSystemNode(new LSystemNodeLiteral(literal));
+            }
+            else if (mainChild != null) {
+                var result = new LSystemNode(new LSystemNodeLiteral(literal));
+                result.mainChild = mainChild.deep_copy();
+                return result;
+            }
+            else {
+                var new_children = new List<LSystemNode>();
+                foreach (var x in children) {
+                    new_children.Add(x.deep_copy());
+                }
+                return new LSystemNode(literal, new_children, this.mainChild.deep_copy());
+            }
+        }
+
+        private static LSystemNode deepestNode(LSystemNode node) {
+            while (node.mainChild != null) {
+                node = node.mainChild;
+            }
+            return node;
+        }
+
+        public LSystemNode newParent() {
+            return deepestNode(this);
+        }
+
+        public override string ToString() {
+            StringBuilder sb = new StringBuilder(literal.ToString());
+            var node = this;
+            while (true) {
+                foreach (var child in node.children) {
+                    sb.Append("[");
+                    sb.Append(child.ToString());
+                    sb.Append("]");
+                }
+                if (node.mainChild != null) {
+                    sb.Append(node.mainChild.literal.ToString());
+                    node = node.mainChild;
+                }
+                else {
+                    return sb.ToString();
+                }
+            }
+        }
+    }
+
+
+    public class LSystemEvaluator {
+        public LSystemNode lSystemString { get; set; }
+        public List<LSystemRule> lSystemRules { get; set; }
+        public String[] ignored { get; set; }
+
+        public LSystemEvaluator(LSystemNode startingString, List<LSystemRule> rules) {
+            lSystemString = startingString;
+            lSystemRules = rules;
+            ignored = new String[0];
+        }
+        public LSystemEvaluator(LSystemNode startingString, List<LSystemRule> rules, String[] ignored) {
+            lSystemString = startingString;
+            lSystemRules = rules;
+            this.ignored = ignored;
+        }
+        private LSystemNode _rewrite(LSystemNode node) {
+            foreach (var rule in lSystemRules) {
+                if (rule.is_aplicable(node, ignored)) {
+                    return rule.rewrite(node, ignored);
+                }
+            }
+            return new LSystemNode(node.literal);
+        }
+        //private void _rewrite_recursive(LSystemNode node, LSystemNode parent) {
+        //    var new_node = _rewrite(node);
+        //    parent.children.Add(new_node);
+        //    new_node.parent = parent;
+        //    var new_parent = new_node.newParent();
+
+        //    foreach (var child in node.children) {
+        //        _rewrite_recursive(child, new_parent);
+        //    }
+        //}
+
+
+        private void _rewrite_recursive(LSystemNode node, LSystemNode parent) {
+            var new_node = _rewrite(node);
+            parent.children.Add(new_node);
+            new_node.parent = parent;
+            var new_parent = new_node.newParent();
+
+            foreach (var child in node.children) {
+                _rewrite_recursive(child, new_parent);
+            }
+            while (node.mainChild != null) {
+                new_node = _rewrite(node.mainChild);
+                new_node.parent = new_parent;
+
+                new_parent.mainChild = new_node;
+                new_parent = new_node.newParent();
+                foreach (var child in node.mainChild.children) {
+                    _rewrite_recursive(child, new_parent);
+                }
+                node = node.mainChild;
+            }
+        }
+        public void rewrite() {
+            var new_root = _rewrite(lSystemString);
+            var new_parent = new_root.newParent();
+            foreach (var child in lSystemString.children) {
+                _rewrite_recursive(child, new_parent);
+            }
+            var node = lSystemString;
+
+            while (node.mainChild != null) {
+                var new_node = _rewrite(node.mainChild);
+                new_node.parent = new_parent;
+
+                new_parent.mainChild = new_node;
+                new_parent = new_node.newParent();
+                foreach (var child in node.mainChild.children) {
+                    _rewrite_recursive(child, new_parent);
+                }
+                node = node.mainChild;
+            }
+            lSystemString = new_root;
+        }
+        //private void rewrite(ref LSystemNode currentNode)
+    }
+    //abstract class LSystemWordParser { }
+    //abstract class LSystemRulesParser { }
+
+    class A {
+        public int B { get; set; }
+        public A[] AA { get; set; }
+    }
+    class Program {
+        static void runParametric() {
+
+            Dictionary<string, int> variableIndex = new Dictionary<string, int> {
+                {"a", 0},
+                {"b", 1},
+
+            };
+            var predecesor1 = LSystemFileParser.parsePredecesor("B(a,b)");
+            var predecesor2 = LSystemFileParser.parsePredecesor("A(a)");
+            var condition1 = MathExpressionComparasionParser.parse(variableIndex, "a>b");
+            var condition2 = MathExpressionComparasionParser.parse(variableIndex, "a>5");
+
+            var builder = new LSystemWordGeneratorBuilder(variableIndex);
+
+            var consequent1 = (LSystemNodeGenerator)LSystemFileParser.parseWord("B(0,b)[A(a/2)]A(a/2)", builder);
+            var consequent2 = (LSystemNodeGenerator)LSystemFileParser.parseWord("B(a+3.5,b+1)", builder);
+            var consequent3 = (LSystemNodeGenerator)LSystemFileParser.parseWord("B(0,a)", builder);
+            var consequent4 = (LSystemNodeGenerator)LSystemFileParser.parseWord("A(a+1)", builder);
+
+            var rule1 = new LSystemRuleParametric(predecesor1, new MathExpressionComparison[] { condition1 }, consequent1 );
+            var rule2 = new LSystemRuleParametric(predecesor1, new MathExpressionComparison[] { }, consequent2 );
+            var rule3 = new LSystemRuleParametric(predecesor2, new MathExpressionComparison[] { condition2 }, consequent3 );
+            var rule4 = new LSystemRuleParametric(predecesor2, new MathExpressionComparison[] { }, consequent4);
+
+            var axiom = LSystemFileParser.parseWord("A(6)", new LSystemWordBuilder());
+
+            var rules = new List<LSystemRule> { rule1, rule2, rule3, rule4 };
+            var evaluator = new LSystemEvaluator(axiom, rules);
+            Console.WriteLine(evaluator.lSystemString.ToString());
+            for (int i = 0; i < 20; i++) {
+                evaluator.rewrite();
+                Console.WriteLine(evaluator.lSystemString.ToString());
+            }
+        }
+        static void runContext() {
+            var axiom = LSystemFileParser.parseWord("A(1)A(1)A(1)A(1)A(1)A(1)B(2)", new LSystemWordBuilder());
+            var predecesor = LSystemFileParser.parsePredecesor("A(a)");
+            var predecesor1 = LSystemFileParser.parsePredecesor("B(b)");
+
+            var contex = new LSystemContext();
+            contex.setOnlySucceeding(new LSystemNodeLiteral("B", 1));
+
+            var contex1 = new LSystemContext();
+            contex1.setOnlyPreceding(new LSystemNodeLiteral("A", 1));
+
+
+            Dictionary<string, int> variableIndex = new Dictionary<string, int> {
+                { "a", 0 },
+                { "b", 1 },
+            };
+            var builder = new LSystemWordGeneratorBuilder(variableIndex);
+            var consequent = (LSystemNodeGenerator)LSystemFileParser.parseWord("B(a)", builder);
+            var consequent1 = (LSystemNodeGenerator)LSystemFileParser.parseWord("A(1)", builder);
+            var consequent2 = (LSystemNodeGenerator)LSystemFileParser.parseWord("A(a+1)", builder);
+
+            MathExpressionComparison comparison = MathExpressionComparasionParser.parse(variableIndex, "a>b");
+            MathExpressionComparison comparison1 = MathExpressionComparasionParser.parse(variableIndex, "a<=b");
+
+            var rule = new LSystemRuleParametricStochasticContext(predecesor, new MathExpressionComparison[] { comparison }, consequent, contex);
+            var rule1 = new LSystemRuleParametricStochasticContext(predecesor, new MathExpressionComparison[] { }, consequent2, contex);
+            var rule2 = new LSystemRuleParametricStochasticContext(predecesor1, new MathExpressionComparison[] { comparison }, consequent1, contex1);
+
+
+            var rules = new List<LSystemRule> { rule, rule1, rule2 };
+            var evaluator = new LSystemEvaluator(axiom, rules);
+            Console.WriteLine(evaluator.lSystemString.ToString());
+            for (int i = 0; i < 20; i++) {
+                evaluator.rewrite();
+                Console.WriteLine(evaluator.lSystemString.ToString());
+            }
+
+        }
+        static void runFile() {
+            Console.WriteLine("Enter filepath:");
+            string filepath = Console.ReadLine();
+            var evaluator = LSystemFileParser.parseLSystem(new StreamReader(filepath));
+            Console.WriteLine(evaluator.lSystemString.ToString());
+            while (true) {
+                Console.ReadLine();
+                evaluator.rewrite();
+                Console.WriteLine(evaluator.lSystemString.ToString());
+            }
+
+        }
+        static void Main(string[] args) {
+            runFile();
+            //runContext();
+            //var Al = new LSystemNodeLiteral("Al", 0);
+            //var Ar = new LSystemNodeLiteral("Ar", 0);
+            //var Bl = new LSystemNodeLiteral("Bl", 0);
+            //var Br = new LSystemNodeLiteral("Br", 0);
+
+            //var root = new LSystemNode(Ar);
+            //var rule_list = new List<LSystemRule>();
+
+            //var result = new LSystemNode(Al);
+            //result.children.Add(new LSystemNode(Br));
+
+            //rule_list.Add(new LSystemRuleBasic(Ar, result));
+
+            //result = new LSystemNode(Bl);
+            //result.children.Add(new LSystemNode(Ar));
+            //rule_list.Add(new LSystemRuleBasic(Al, result));
+
+            //result = new LSystemNode(Ar);
+            //rule_list.Add(new LSystemRuleBasic(Br, result));
+
+            //result = new LSystemNode(Al);
+            //rule_list.Add(new LSystemRuleBasic(Bl, result));
+
+
+            //var evaluator = new LSystemEvaluator(root, rule_list);
+            //for (int i=0; i < 5; i++) {
+            //    Console.WriteLine(evaluator.lSystemString.ToString());
+            //    evaluator.rewrite();
+            //}
+            //Console.WriteLine(evaluator.lSystemString.ToString());
+
+
+
+
+            //var node = LSystemFileParser.parseWord("A[AA][A]AB(1,2)[A(1)]C", new LSystemWordBuilder());
+            //Console.WriteLine(node.ToString());
+        }
+    }
+}

Assets/Scripts/LSystem/Program.cs.meta

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Assets/Scripts/Misc.meta

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+fileFormatVersion: 2
+guid: fb9b81b8178132748addd3b3c42297cc
+folderAsset: yes
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+  externalObjects: {}
+  userData: 
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+  assetBundleVariant: 

Assets/Scripts/Misc/MatrixExtensions.cs

@@ -0,0 +1,36 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+
+public static class MatrixExtensions {
+    public static Quaternion ExtractRotation(this Matrix4x4 matrix) {
+        Vector3 forward;
+        forward.x = matrix.m02;
+        forward.y = matrix.m12;
+        forward.z = matrix.m22;
+
+        Vector3 upwards;
+        upwards.x = matrix.m01;
+        upwards.y = matrix.m11;
+        upwards.z = matrix.m21;
+
+        return Quaternion.LookRotation(forward, upwards);
+    }
+
+    public static Vector3 ExtractPosition(this Matrix4x4 matrix) {
+        Vector3 position;
+        position.x = matrix.m03;
+        position.y = matrix.m13;
+        position.z = matrix.m23;
+        return position;
+    }
+
+    public static Vector3 ExtractScale(this Matrix4x4 matrix) {
+        Vector3 scale;
+        scale.x = new Vector4(matrix.m00, matrix.m10, matrix.m20, matrix.m30).magnitude;
+        scale.y = new Vector4(matrix.m01, matrix.m11, matrix.m21, matrix.m31).magnitude;
+        scale.z = new Vector4(matrix.m02, matrix.m12, matrix.m22, matrix.m32).magnitude;
+        return scale;
+    }
+}

Assets/Scripts/Misc/MatrixExtensions.cs.meta

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Assets/Scripts/Turtle2D.cs

@@ -0,0 +1,25 @@
+using System.Collections;
+using System.Collections.Generic;
+using System.IO;
+using UnityEditor;
+using UnityEngine;
+using ConsoleLSystem;
+using System;
+
+public class Turtle2D : TurtleLSystem {
+    public GameObject obj;
+    public float angle;
+
+    protected override void initLiteralInterpretation() {
+        turtleInterpretation = new Dictionary<string, Func<float[], Tuple<GameObject, Matrix4x4>>>();
+        //turtleInterpretation
+        var transformation = Matrix4x4.Translate(new Vector3(0.0f, 0.1f, 0)) * Matrix4x4.Scale(new Vector3 (0.05f, 0.1f, 0.05f));
+
+        turtleInterpretation.Add("+", (float[] args) => new Tuple<GameObject, Matrix4x4>(null, Matrix4x4.Rotate(Quaternion.Euler(0, 0, -angle))));
+        turtleInterpretation.Add("-", (float[] args) => new Tuple<GameObject, Matrix4x4>(null, Matrix4x4.Rotate(Quaternion.Euler(0, 0, angle))));
+
+        //Wildcard how to represent any other symbol
+        turtleInterpretation.Add("*.*", (float[] args) => new Tuple<GameObject, Matrix4x4>(obj, transformation));
+    }
+}
+    

Assets/Scripts/Turtle2D.cs.meta

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