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TerrainPatch.h
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1 /* Project Starshatter 4.5
2  Destroyer Studios LLC
3  Copyright © 1997-2005. All Rights Reserved.
4 
5  SUBSYSTEM: Stars.exe
6  FILE: TerrainPatch.h
7  AUTHOR: John DiCamillo
8 
9 
10  OVERVIEW
11  ========
12  A Single Multi-LOD Section of a Terrain Object
13 */
14 
15 #ifndef TerrainPatch_h
16 #define TerrainPatch_h
17 
18 #include "Types.h"
19 #include "Solid.h"
20 #include "Geometry.h"
21 #include "Polygon.h"
22 
23 // +--------------------------------------------------------------------+
24 
25 class Projector;
26 class Terrain;
27 class Water;
28 
29 // +--------------------------------------------------------------------+
30 
31 class TerrainPatch : public Solid
32 {
33 public:
34  TerrainPatch(Terrain* terrain,
35  const Bitmap* patch, const Rect& rect,
36  const Point& p1, const Point& p2);
37  TerrainPatch(Terrain* terrain, const Rect& rect,
38  const Point& p1, const Point& p2,
39  double sea_level);
40  virtual ~TerrainPatch();
41 
42  virtual void SelectDetail(Projector* projector);
43  virtual void Render(Video* video, DWORD flags);
44 
45  virtual int CollidesWith(Graphic& o);
46 
47  // accessors:
48  double Scale() const { return scale; }
49  double MountainScale() const { return mtnscale; }
50  double SeaLevel() const { return base; }
51  double MinHeight() const { return min_height; }
52  double MaxHeight() const { return max_height; }
53  bool IsWater() const { return water != 0; }
54 
55  void UpdateSurfaceWaves(Vec3& eyePos);
56 
57  void SetScales(double scale, double mtnscale, double base);
58  void SetDetailLevel(int nd);
59 
60  virtual int CheckRayIntersection(Point pt, Point vpn, double len, Point& ipt,
61  bool treat_translucent_polys_as_solid=true);
62 
63  double Height(double x, double y) const;
64  DWORD BlendValue(double y);
65  int CalcLayer(Poly* p);
66  void Illuminate(Color ambient, List<Light>& lights);
67 
68 protected:
69  virtual bool BuildDetailLevel(int level);
70 
71  enum { MAX_LOD=8 };
72 
73  Terrain* terrain;
74  int patch_size;
75  int ndetail;
76  int max_detail;
77  int terrain_width;
78 
79  Rect rect;
80  float* heights;
81  Model* detail_levels[MAX_LOD];
82  List<Material> materials;
83  Water* water;
84 
85  double scale;
86  double mtnscale;
87  double base;
88  double size;
89  float min_height;
90  float max_height;
91 };
92 
93 #endif TerrainPatch_h
94