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POJava - the game of Life; problems with life detection
 

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  1. POJava - the game of Life; problems with life detection
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    <p>I'm attempting the <a href="http://www.bitstorm.org/gameoflife/" rel="nofollow">Game of Life</a> - what I'm stuck on is determining whether a space should be alive or dead based on the area around it. I'm at the point where I can't tell what I'm doing wrong - hopefully another set of eyes can help.</p> <p>This is just a snippet, full code here: <a href="http://pastebin.com/ucYe653p" rel="nofollow">http://pastebin.com/ucYe653p</a></p> <pre><code>public static void updateMatrix(boolean[][] board, int[] birthLive) { //clone the board so modified values don't affect the results of upcoming spaces boolean[][] boardCopy = board.clone(); for (int i = 0; i &lt; board.length; i++) boardCopy[i] = board[i].clone(); int count = 0; for (int i = 1; i &lt; board.length - 1; i++) { for (int j = 1; j &lt; board[i].length - 1; j++) { //different requirements for dead or living pieces' living status if (board[i][j] == false) { //check the nine-by-nine square, starting at (-1, 1) and ending at (1, -1) where 0 is the affected location // * * * // * 0 * // * * * for (int ii = board[i - 1].length; ii &lt; board[i + 1].length; ii++) { for (int jj = board[j - 1].length; ii &lt; board[j + 1].length; jj++) { if (boardCopy[i][j] == true) count++; } } //check to see what high and low amt of required adjacent lifeforms is if (count &gt;= birthLive[0] &amp;&amp; count &lt;= birthLive[1]) board[i][j] = true; else board[i][j] = false; count = 0; } else { for (int ii = board[i - 1].length; ii &lt; board[i + 1].length; ii++) { for (int jj = board[j - 1].length; ii &lt; board[j + 1].length; jj++) { if (boardCopy[i][j] == true) count++; } } count -= 1; //For board[i][j] is always true if (count &gt;= birthLive[2] &amp;&amp; count &lt;= birthLive[3]) board[i][j] = true; else board[i][j] = false; count = 0; } } } } </code></pre>
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    1. COCan you describe what the symptom of the problem is?
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    2. COYou need to give us an idea of what is going wrong. ie. What you expect this code to do, and what it does do.
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    3. CORight, sorry. `To calculate whether an entity lives at a given cell for the next iteration, you will need to calculate the number of entities in the neighborhood and compare the count with the birth range (if the cell is empty) or live range (if there was already an entity there). Note that the count must be based on the values as of the previous iteration. This means that you will need to make a copy of the matrix before doing the updates so you can count entities in neighborhoods based on original values.` How it looks: http://i.imgur.com/C0i4e.png
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