gemrb/core/Polygon.h

   1 /* GemRB - Infinity Engine Emulator
   2  * Copyright (C) 2003 The GemRB Project
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  17  *
  18  */
  19 #ifndef POLYGON_H
  20 #define POLYGON_H
  21
  22 #include "RGBAColor.h"
  23 #include "exports.h"
  24 #include "globals.h"
  25
  26 #include "Region.h"
  27
  28 #include <list>
  29
  30 class GEM_EXPORT Trapezoid {
  31 public:
  32         int y1, y2;
  33         int left_edge, right_edge;
  34 };
  35
  36 class GEM_EXPORT Gem_Polygon {
  37 public:
  38         Gem_Polygon(Point* points, unsigned int count, Region *bbox = NULL);
  39         ~Gem_Polygon(void);
  40         Region BBox;
  41         Point* points;
  42         unsigned int count;
  43         std::list<Trapezoid> trapezoids;
  44         bool PointIn(const Point &p) const;
  45         bool PointIn(int x, int y) const;
  46         void RecalcBBox();
  47         void ComputeTrapezoids();
  48 };
  49
  50 // wall polygons are used to render area wallgroups
  51 // wall polygons never create a surface
  52 //ALWAYSCOVER wallpolygon blocks everything that it covers
  53 //BASELINE means there is a baseline, the loader makes the distinction
  54 //between first edge is base line/separate baseline
  55 //DITHER means the polygon only dithers what it covers
  56
  57 #define WF_ALWAYSCOVER  0
  58 #define WF_BASELINE 1
  59 #define WF_DITHER 2
  60 //this is used only externally, but converted to baseline on load time
  61 #define WF_HOVER 4
  62 // cover animations
  63 #define WF_COVERANIMS 8
  64 // door polygons are not always drawn
  65 #define WF_DISABLED 0x80
  66
  67 class GEM_EXPORT Wall_Polygon: public Gem_Polygon {
  68 public:
  69         Wall_Polygon(Point *points,int count,Region *bbox) : Gem_Polygon(points,count,bbox) {}
  70         //is the point above the baseline
  71         bool PointCovered(const Point &p) const;
  72         bool PointCovered(int x, int y) const;
  73         ieDword GetPolygonFlag() const { return wall_flag; }
  74         void SetPolygonFlag(ieDword flg) { wall_flag=flg; }
  75         void SetBaseline(const Point &a, const Point &b);
  76 public:
  77         ieDword wall_flag;
  78         Point base0, base1;
  79 };
  80
  81 #endif