add walkmaps support.

Fast detecting between two targets is they in same walkable area.

1 files changed, 44 insertions, 0 deletions

diff --git a/src/walklayer.cpp b/src/walklayer.cpp
new file mode 100644
index 000000000..6a18ba205
--- /dev/null
+++ b/src/walklayer.cpp
@@ -0,0 +1,44 @@
+/*
+ *  The ManaPlus Client
+ *  Copyright (C) 2013  The ManaPlus Developers
+ *
+ *  This file is part of The ManaPlus Client.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "walklayer.h"
+
+#include "debug.h"
+
+WalkLayer::WalkLayer(const int width, const int height) :
+    mWidth(width),
+    mHeight(height)
+{
+    const int sz = width * height;
+    mTiles = new int[sz];
+    std::fill_n(mTiles, sz, 0);
+}
+
+WalkLayer::~WalkLayer()
+{
+    delete [] mTiles;
+}
+
+int WalkLayer::getDataAt(const int x, const int y) const
+{
+    if (x < 0 || x >= mWidth || y < 0 || y >= mHeight)
+        return 0;
+    return mTiles[x + y * mWidth];
+}