From 06296e66cd53bc68198c3bfeace17f85707cc2f4 Mon Sep 17 00:00:00 2001
From: Timothée Floure
Date: Mon, 14 Mar 2016 14:08:15 +0100
Subject: Add the nextBlasts method to the GameState class

---
 src/ch/epfl/xblast/server/GameState.java | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/ch/epfl/xblast/server/GameState.java b/src/ch/epfl/xblast/server/GameState.java
index 685bc54..3bd1961 100644
--- a/src/ch/epfl/xblast/server/GameState.java
+++ b/src/ch/epfl/xblast/server/GameState.java
@@ -21,11 +21,32 @@ public final class GameState {
     private final List<Sq<Sq<Cell>>> explosions;
     private final List<Sq<Cell>> blasts;
 
+    /**
+     * Compute the next state of a blast.
+     *
+     * @param blasts0 existing particles
+     * @param board0 the game's board
+     * @param explosions0 active explosions
+     * @return the position of the explosion's particles for the next state.
+     */
+    private static List<Sq<Cell>> nextBlasts(List<Sq<Cell>> blasts0, Board board0, List<Sq<Sq<Cell>>> explosions0) {
+        List<Sq<Cell>> blasts1 = new ArrayList<>();
+        for (Sq<Cell> blastSeq : blasts0) {
+            if (!blastSeq.tail().isEmpty() && board0.blockAt(blastSeq.head()).isFree()) {
+                blasts1.add(blastSeq.tail());
+            }
+        }
+        for (Sq<Sq<Cell>> explosion0 : explosions0) {
+            blasts1.add(explosion0.head());
+        }
+        return blasts1;
+    }
+
     /**
      * Instanciates a new GameState.
      *
      * @param ticks thie tick corresponding to the state
-     * @param board the board
+     * @param board the game's board
      * @param players list of the players
      * @param bombs list of the bombs
      * @param explosions list of the explosions
-- 
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