Merge 0b9c50145b706e23ec84050706d154308fc90662 into 2286bf332a6a66859fa1ab1a7063f5e3ecc912fc

.idea/misc.xml

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src/main/java/com/zipcodeconway/ConwayGameOfLife.java

 
 public class ConwayGameOfLife {
 
+    private int[][] currentGen;
+    private int[][] nextGen;
+    private SimpleWindow displayWindow;
+
     public ConwayGameOfLife(Integer dimension) {
+
+        this.currentGen = createRandomStart(dimension);
+        this.nextGen = new int [dimension][dimension];
+        this.displayWindow = new SimpleWindow(dimension);
      }
 
     public ConwayGameOfLife(Integer dimension, int[][] startmatrix) {
+
+        this.currentGen = startmatrix;
+        this.nextGen = new int [dimension][dimension];
+        this.displayWindow = new SimpleWindow(dimension);
     }
 
     public static void main(String[] args) {
         ConwayGameOfLife sim = new ConwayGameOfLife(50);
-        int[][] endingWorld = sim.simulate(50);
+        int[][] endingWorld = sim.simulate(500);
     }
 
     // Contains the logic for the starting scenario.
     // Which cells are alive or dead in generation 0.
     // allocates and returns the starting matrix of size 'dimension'
     private int[][] createRandomStart(Integer dimension) {
-        return new int[1][1];
+        int[][] randStart = new int[dimension][dimension];
+        for (int i = 0; i < randStart.length; i++) {
+            for (int j = 0; j < randStart.length; j++) {
+                randStart[i][j] = (int)Math.round(Math.random());
+            }
+        } return randStart;
     }
 
     public int[][] simulate(Integer maxGenerations) {
-        return new int[1][1];
+        int generations = 0;
+
+        while (generations <= maxGenerations) {
+            this.displayWindow.display(currentGen, generations);
+
+            for (int i = 0; i < currentGen.length; i++) {
+                for (int j = 0; j < currentGen.length; j++) {
+                    nextGen[i][j] = isAlive(i, j, currentGen);
+                }
+            }
+            this.displayWindow.sleep(125);
+            copyAndZeroOut(nextGen, currentGen);
+            generations++;
+        }
+        return currentGen;
     }
 
     // copy the values of 'next' matrix to 'current' matrix,
     // and then zero out the contents of 'next' matrix
     public void copyAndZeroOut(int [][] next, int[][] current) {
+
+        for (int i = 0; i < current.length; i++) {
+            for (int j = 0; j < current.length; j++) {
+                current[i][j] = next[i][j];
+                next[i][j] = 0;
+            }
+        }
     }
 
     // Calculate if an individual cell should be alive in the next generation.
 		Any dead cell with exactly three live neighbours cells will come to life.
 	*/
     private int isAlive(int row, int col, int[][] world) {
-        return 0;
+
+        int numberOfLivingNeighbors = numberOfNeighborsAlive(row, col, world);
+
+        if (numberOfLivingNeighbors > 2 && numberOfLivingNeighbors <= 3)
+            return 1;
+        else if (numberOfLivingNeighbors < 2 || numberOfLivingNeighbors > 3)
+            return 0;
+        else return world[row][col];
+
+    }
+
+    public int numberOfNeighborsAlive(int row, int col, int[][] world) {
+
+        int north = col - 1;
+        int south = col + 1;
+        int east = row + 1;
+        int west = row -1;
+
+        if (north < 0) {
+            north = world[row].length-1;
+        }
+        if (south == world[row].length) {
+            south = 0;
+        }
+        if (east == world[col].length) {
+            east = 0;
+        }
+        if (west < 0) {
+            west = world[col].length - 1;
+        }
+
+        return world[row][north] + world[row][south] + world[east][col] + world[west][col]
+                + world[east][north] + world[east][south] + world[west][north] + world[west][south];
+
     }
 }

src/main/java/com/zipcodeconway/SimpleWindow.java

             for (int j = 0; j < array[0].length; j++) {
                 g.drawRect(i * BOX_DIM, j * BOX_DIM, 10, 10);
                 if (array[i][j] == 0) {
-                    g.setColor(Color.WHITE);
+                    g.setColor(Color.GREEN);
                     g.fillRect(i * BOX_DIM, j * BOX_DIM, 10, 10);
                 }
                 if (array[i][j] == 1) {