X-Git-Url: https://git.dogcows.com/gitweb?p=chaz%2Fyoink;a=blobdiff_plain;f=src%2FTilemap.hh;fp=src%2FTilemap.hh;h=163b45af434aa78289412064904c95ba6ec55f20;hp=0000000000000000000000000000000000000000;hb=23d8f7a5fbd1eca7f46f2342c20ac5e28ae0128a;hpb=fa9438c66ae0154e6d9ad196e0fb39649d359da4

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+
+/*******************************************************************************
+
+ Copyright (c) 2009, Charles McGarvey
+ All rights reserved.
+ 
+ Redistribution   and   use  in  source  and  binary  forms,  with  or  without
+ modification, are permitted provided that the following conditions are met:
+ 
+   * Redistributions  of  source  code  must retain the above copyright notice,
+     this list of conditions and the following disclaimer.
+   * Redistributions  in binary form must reproduce the above copyright notice,
+     this  list of conditions and the following disclaimer in the documentation
+     and/or other materials provided with the distribution.
+ 
+ THIS  SOFTWARE  IS  PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND  ANY  EXPRESS  OR  IMPLIED  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED.  IN  NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ FOR  ANY  DIRECT,  INDIRECT,  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES  (INCLUDING,  BUT  NOT  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES;  LOSS  OF  USE,  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+*******************************************************************************/
+
+#ifndef _TILEMAP_HH_
+#define _TILEMAP_HH_
+
+/**
+ * @file Tilemap.hh
+ * Small subclass to give some basic tile-mapping functionality to textures.
+ */
+
+#include <boost/shared_ptr.hpp>
+
+#include <Moof/Math.hh>
+#include <Moof/Texture.hh>
+
+
+/**
+ * A tilemap is a texture which is meant to be divided into smaller sprites.
+ * This class provides all the functionality of a texture and adds some methods
+ * to get texture coordinates to individual tiles within the tilemap.  For
+ * simplicity, this class assumes square tiles.
+ */
+
+class Tilemap : public Mf::Texture
+{
+public:
+	/**
+	 * Possible orientations for texture coordinates.
+	 */
+
+	typedef unsigned Index;
+	static const Index NO_TILE = -1;
+
+	typedef enum
+	{
+		NORMAL =			0,			///< Normal orientation.
+		FLIP =				1,			///< Flip over a horizontal axis.
+		REVERSE =			2,			///< Flip over a vertical axis.
+		FLIP_AND_REVERSE =	3			///< Flip over both.
+	} Orientation;
+
+
+	Tilemap(const std::string& name);
+
+	/**
+	 * Calculate texture coordinates for a tile at a certain index.  Tiles are
+	 * indexed start with zero as the to-left tile and moving across, then down.
+	 * @param index The tile index.
+	 * @param coords An array of scalars where the texture coordinates will be
+	 * stored after this call.  The first coordinate (u,v) will be in the first
+	 * two places and so on until all four coordinates are stored, therefore
+	 * requiring enough room for an array of eight scalars.  The winding of the
+	 * coordinates is always counter-clockwise (the GL default).
+	 * @return True if index is valid, false otherwise.
+	 */
+
+	bool getTileCoords(Index index, Mf::Scalar coords[8]) const;
+
+
+	/**
+	 * This version let's you specify an orientation that will be reflected in
+	 * the texture coordinates.  This allows you to easily map a texture
+	 * backwards or upside-down.
+	 * @param what The orientation; can be flip, reverse, or flip_and_reverse.
+	 * @return True if index is valid, false otherwise.
+	 */
+
+	bool getTileCoords(Index index, Mf::Scalar coords[8], Orientation what) const;
+
+
+	static std::string getPath(const std::string& name);
+
+private:
+	class Impl;
+	boost::shared_ptr<Impl> impl_;
+};
+
+
+#endif // _TILEMAP_HH_
+
+/** vim: set ts=4 sw=4 tw=80: *************************************************/
+