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Graphic.cpp
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1 /* Project nGenEx
2  Destroyer Studios LLC
3  Copyright © 1997-2004. All Rights Reserved.
4 
5  SUBSYSTEM: nGenEx.lib
6  FILE: Graphic.cpp
7  AUTHOR: John DiCamillo
8 
9 
10  OVERVIEW
11  ========
12  Abstract 3D Graphic Object
13 */
14 
15 #include "MemDebug.h"
16 #include "Graphic.h"
17 #include "Scene.h"
18 #include "Projector.h"
19 
20 // +--------------------------------------------------------------------+
21 
22 int Graphic::id_key = 1;
23 
24 // +--------------------------------------------------------------------+
25 
26 Graphic::Graphic()
27 : id(id_key++), visible(true), loc(0.0f, 0.0f, 0.0f),
28 radius(0.0f), infinite(0), foreground(0), hidden(0), life(-1),
29 trans(false), shadow(false), luminous(false), depth(0.0f), scene(0)
30 {
31  screen_rect.x = 0;
32  screen_rect.y = 0;
33  screen_rect.w = 0;
34  screen_rect.h = 0;
35 
36  ZeroMemory(name, sizeof(name));
37  strcpy_s(name, "Graphic");
38 }
39 
40 // +--------------------------------------------------------------------+
41 
42 Graphic::~Graphic()
43 { }
44 
45 int
46 Graphic::operator < (const Graphic& g) const
47 {
48  if (!infinite && g.infinite)
49  return 1;
50 
51  else if (infinite && !g.infinite)
52  return 0;
53 
54  double za = fabs(Depth());
55  double zb = fabs(g.Depth());
56 
57  return (za < zb);
58 }
59 
60 int
61 Graphic::operator <= (const Graphic& g) const
62 {
63  if (!infinite && g.infinite)
64  return 1;
65 
66  else if (infinite && !g.infinite)
67  return 0;
68 
69  double za = fabs(Depth());
70  double zb = fabs(g.Depth());
71 
72  return (za <= zb);
73 }
74 
75 // +--------------------------------------------------------------------+
76 
77 void
78 Graphic::SetInfinite(bool b)
79 {
80  infinite = (BYTE) b;
81 
82  if (infinite)
83  depth = 1.0e9f;
84 }
85 
86 // +--------------------------------------------------------------------+
87 
88 int
89 Graphic::Nearer(Graphic* a, Graphic* b)
90 {
91  if (a->depth < b->depth) return -1;
92  else if (a->depth == b->depth) return 0;
93  else return 1;
94 }
95 
96 // +--------------------------------------------------------------------+
97 
98 int
99 Graphic::Farther(Graphic* a, Graphic* b)
100 {
101  if (a->depth > b->depth) return -1;
102  else if (a->depth == b->depth) return 0;
103  else return 1;
104 }
105 
106 // +--------------------------------------------------------------------+
107 
108 void
109 Graphic::Destroy()
110 {
111  if (scene)
112  scene->DelGraphic(this);
113 
114  delete this;
115 }
116 
117 // +--------------------------------------------------------------------+
118 
119 int
120 Graphic::CollidesWith(Graphic& o)
121 {
122  Point delta_loc = loc - o.loc;
123 
124  // bounding spheres test:
125  if (delta_loc.length() > radius + o.radius)
126  return 0;
127 
128  return 1;
129 }
130 
131 // +--------------------------------------------------------------------+
132 
133 int
134 Graphic::CheckRayIntersection(Point Q, Point w, double len, Point& ipt,
135 bool treat_translucent_polys_as_solid)
136 {
137  return 0;
138 }
139 
140 // +--------------------------------------------------------------------+
141 
142 void
143 Graphic::ProjectScreenRect(Projector* p)
144 {
145  screen_rect.x = 2000;
146  screen_rect.y = 2000;
147  screen_rect.w = 0;
148  screen_rect.h = 0;
149 }
150 
151 // +--------------------------------------------------------------------+
152 
153 bool
154 Graphic::CheckVisibility(Projector& projector)
155 {
156  if (projector.IsVisible( Location(), Radius()) &&
157  projector.ApparentRadius(Location(), Radius()) > 1) {
158 
159  visible = true;
160  }
161  else {
162  visible = false;
163  screen_rect.x = 2000;
164  screen_rect.y = 2000;
165  screen_rect.w = 0;
166  screen_rect.h = 0;
167  }
168 
169  return visible;
170 }