Dogcows Code - chaz/yoink/blob - src/Tilemap.hh

   1
   2 /*******************************************************************************
   3
   4  Copyright (c) 2009, Charles McGarvey
   5  All rights reserved.
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   7  Redistribution   and   use  in  source  and  binary  forms,  with  or  without
   8  modification, are permitted provided that the following conditions are met:
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  10    * Redistributions  of  source  code  must retain the above copyright notice,
  11      this list of conditions and the following disclaimer.
  12    * Redistributions  in binary form must reproduce the above copyright notice,
  13      this  list of conditions and the following disclaimer in the documentation
  14      and/or other materials provided with the distribution.
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  16  THIS  SOFTWARE  IS  PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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  27 *******************************************************************************/
  28
  29 #ifndef _TILEMAP_HH_
  30 #define _TILEMAP_HH_
  31
  32 /**
  33  * @file Tilemap.hh
  34  * Small subclass to give some basic tile-mapping functionality to textures.
  35  */
  36
  37 #include <boost/shared_ptr.hpp>
  38
  39 #include <Moof/Math.hh>
  40 #include <Moof/Texture.hh>
  41
  42
  43 /**
  44  * A tilemap is a texture which is meant to be divided into smaller sprites.
  45  * This class provides all the functionality of a texture and adds some methods
  46  * to get texture coordinates to individual tiles within the tilemap.  For
  47  * simplicity, this class assumes square tiles.
  48  */
  49
  50 class Tilemap : public Mf::Texture
  51 {
  52 public:
  53         /**
  54          * Possible orientations for texture coordinates.
  55          */
  56
  57         typedef unsigned Index;
  58         static const Index NO_TILE = -1;
  59
  60         typedef enum
  61         {
  62                 NORMAL =                        0,                      ///< Normal orientation.
  63                 FLIP =                          1,                      ///< Flip over a horizontal axis.
  64                 REVERSE =                       2,                      ///< Flip over a vertical axis.
  65                 FLIP_AND_REVERSE =      3                       ///< Flip over both.
  66         } Orientation;
  67
  68
  69         Tilemap(const std::string& name);
  70
  71         /**
  72          * Calculate texture coordinates for a tile at a certain index.  Tiles are
  73          * indexed start with zero as the to-left tile and moving across, then down.
  74          * @param index The tile index.
  75          * @param coords An array of scalars where the texture coordinates will be
  76          * stored after this call.  The first coordinate (u,v) will be in the first
  77          * two places and so on until all four coordinates are stored, therefore
  78          * requiring enough room for an array of eight scalars.  The winding of the
  79          * coordinates is always counter-clockwise (the GL default).
  80          * @return True if index is valid, false otherwise.
  81          */
  82
  83         bool getTileCoords(Index index, Mf::Scalar coords[8]) const;
  84
  85
  86         /**
  87          * This version let's you specify an orientation that will be reflected in
  88          * the texture coordinates.  This allows you to easily map a texture
  89          * backwards or upside-down.
  90          * @param what The orientation; can be flip, reverse, or flip_and_reverse.
  91          * @return True if index is valid, false otherwise.
  92          */
  93
  94         bool getTileCoords(Index index, Mf::Scalar coords[8], Orientation what) const;
  95
  96
  97         static std::string getPath(const std::string& name);
  98
  99 private:
 100         class Impl;
 101         boost::shared_ptr<Impl> impl_;
 102 };
 103
 104
 105 #endif // _TILEMAP_HH_
 106
 107 /** vim: set ts=4 sw=4 tw=80: *************************************************/
 108