add basic core structure and first parts of antGame implementation

src/main/java/evironment/antGame/AntAction.java

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+package evironment.antGame;
+
+public enum AntAction {
+    MOVE_UP,
+    MOVE_RIGHT,
+    MOVE_DOWN,
+    MOVE_LEFT,
+    PICK_UP,
+    DROP_DOWN,
+}

src/main/java/evironment/antGame/AntObservation.java

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+package evironment.antGame;
+
+import core.Observation;
+
+public class AntObservation implements Observation {
+}

src/main/java/evironment/antGame/AntState.java

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+package evironment.antGame;
+
+import core.State;
+
+// somewhat the "brain" of the agent, current known setting of the environment
+public class AntState implements State {
+}

src/main/java/evironment/antGame/AntWorld.java

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+package evironment.antGame;
+
+import core.DiscreteAction;
+import core.Observation;
+import core.RNG;
+import core.StepResult;
+
+public class AntWorld {
+    private Grid grid;
+
+    public AntWorld(int width, int height, double foodDensity){
+        grid = new Grid(width, height, foodDensity);
+    }
+
+    public AntWorld(){
+        this(30, 30, 0.1);
+    }
+
+    public StepResult step(DiscreteAction<AntAction> action){
+        Observation observation = new AntObservation();
+        return new StepResult(observation, 0.0, false, "");
+    }
+
+    public void reset(){
+        RNG.reseed();
+        grid.initCells();
+    }
+}

src/main/java/evironment/antGame/Cell.java

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+package evironment.antGame;
+
+public class Cell {
+    private CellType type;
+    private int food;
+
+    public Cell(CellType cellType, int foodAmount){
+        type = cellType;
+        food = foodAmount;
+    }
+
+    public Cell(CellType cellType){
+       this(cellType, 0);
+    }
+
+    public void setFoodCount(int amount){
+        food = amount;
+    }
+
+    public int getFoodCount(){
+        return food;
+    }
+}

src/main/java/evironment/antGame/CellType.java

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+package evironment.antGame;
+
+public enum CellType {
+    START,
+    FREE,
+    OBSTACLE,
+    FOOD,
+}

src/main/java/evironment/antGame/Grid.java

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+package evironment.antGame;
+
+import core.RNG;
+
+import java.awt.*;
+
+public class Grid {
+    private int width;
+    private int height;
+    private double foodDensity;
+    private Point start;
+    private Cell[][] grid;
+
+    public Grid(int width, int height, double foodDensity){
+        this.width = width;
+        this.height = height;
+        this.foodDensity = foodDensity;
+
+        grid = new Cell[width][height];
+    }
+
+    public void initCells(){
+        for(int x = 0; x < width; ++x){
+            for(int y = 0; y < height; ++y){
+                if( RNG.getRandom().nextDouble() < foodDensity){
+                    grid[x][y] = new Cell(CellType.FOOD, 1);
+                }else{
+                    grid[x][y] = new Cell(CellType.FREE);
+                }
+            }
+        }
+        start = new Point(RNG.getRandom().nextInt(width), RNG.getRandom().nextInt(height));
+        grid[start.x][start.y] = new Cell(CellType.START);
+    }
+
+    public Point getStartPoint(){
+        return start;
+    }
+
+    public Cell[][] getGrid(){
+        return grid;
+    }
+
+    public int getWidth(){
+        return width;
+    }
+    public int getHeight(){
+        return height;
+    }
+
+}