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Bolt.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: Bolt.cpp
7  AUTHOR: John DiCamillo
8 
9 
10  OVERVIEW
11  ========
12  3D Bolt (Polygon) Object
13 */
14 
15 #include "MemDebug.h"
16 #include "Bolt.h"
17 #include "Bitmap.h"
18 #include "Camera.h"
19 #include "Video.h"
20 
21 void Print(const char* fmt, ...);
22 
23 // +--------------------------------------------------------------------+
24 
25 Bolt::Bolt(double len, double wid, Bitmap* tex, int share)
26 : vset(4), poly(0), texture(tex),
27 length(len), width(wid), shade(1.0), vpn(0, 1, 0), shared(share)
28 {
29  trans = true;
30 
31  loc = Vec3(0.0f, 0.0f, 1000.0f);
32 
33  vset.nverts = 4;
34 
35  vset.loc[0] = Point( width, 0, 1000);
36  vset.loc[1] = Point( width, -length, 1000);
37  vset.loc[2] = Point(-width, -length, 1000);
38  vset.loc[3] = Point(-width, 0, 1000);
39 
40  vset.tu[0] = 0.0f;
41  vset.tv[0] = 0.0f;
42  vset.tu[1] = 1.0f;
43  vset.tv[1] = 0.0f;
44  vset.tu[2] = 1.0f;
45  vset.tv[2] = 1.0f;
46  vset.tu[3] = 0.0f;
47  vset.tv[3] = 1.0f;
48 
49  Plane plane(vset.loc[0], vset.loc[1], vset.loc[2]);
50 
51  for (int i = 0; i < 4; i++) {
52  vset.nrm[i] = plane.normal;
53  }
54 
55  mtl.Ka = Color::White;
56  mtl.Kd = Color::White;
57  mtl.Ks = Color::Black;
58  mtl.Ke = Color::White;
59  mtl.tex_diffuse = texture;
60  mtl.tex_emissive = texture;
61  mtl.blend = Video::BLEND_ADDITIVE;
62 
63  poly.nverts = 4;
64  poly.vertex_set = &vset;
65  poly.material = &mtl;
66  poly.verts[0] = 0;
67  poly.verts[1] = 1;
68  poly.verts[2] = 2;
69  poly.verts[3] = 3;
70 
71  radius = (float) ((length>width) ? (length) : (width*2));
72 
73  if (texture) {
74  strncpy_s(name, texture->GetFilename(), 31);
75  name[31] = 0;
76  }
77 }
78 
79 // +--------------------------------------------------------------------+
80 
81 Bolt::~Bolt()
82 {
83 }
84 
85 // +--------------------------------------------------------------------+
86 
87 void
88 Bolt::Render(Video* video, DWORD flags)
89 {
90  if ((flags & RENDER_ADDITIVE) == 0)
91  return;
92 
93  if (visible && !hidden && video && life) {
94  const Camera* camera = video->GetCamera();
95 
96  Point head = loc;
97  Point tail = origin;
98  Point vtail = tail - head;
99  Point vcam = camera->Pos() - loc;
100  Point vtmp = vcam.cross(vtail);
101  vtmp.Normalize();
102  Point vlat = vtmp * -width;
103  Vec3 vnrm = camera->vpn() * -1;
104 
105  vset.loc[0] = head + vlat;
106  vset.loc[1] = tail + vlat;
107  vset.loc[2] = tail - vlat;
108  vset.loc[3] = head - vlat;
109 
110  vset.nrm[0] = vnrm;
111  vset.nrm[1] = vnrm;
112  vset.nrm[2] = vnrm;
113  vset.nrm[3] = vnrm;
114 
115  ColorValue white((float) shade, (float) shade, (float) shade);
116  mtl.Ka = white;
117  mtl.Kd = white;
118  mtl.Ks = Color::Black;
119  mtl.Ke = white;
120 
121  video->DrawPolys(1, &poly);
122  }
123 }
124 
125 // +--------------------------------------------------------------------+
126 
127 void
128 Bolt::Update()
129 {
130 }
131 
132 // +--------------------------------------------------------------------+
133 
134 void
135 Bolt::TranslateBy(const Point& ref)
136 {
137  loc = loc - ref;
138  origin = origin - ref;
139 }
140 
141 // +--------------------------------------------------------------------+
142 
143 void
144 Bolt::SetOrientation(const Matrix& o)
145 {
146  vpn = Point(o(2,0), o(2,1), o(2,2));
147  origin = loc + (vpn * -length);
148 }
149 
150 void
151 Bolt::SetDirection(const Point& v)
152 {
153  vpn = v;
154  origin = loc + (vpn * -length);
155 }
156 
157 void
158 Bolt::SetEndPoints(const Point& from, const Point& to)
159 {
160  loc = to;
161  origin = from;
162  vpn = to - from;
163  length = vpn.Normalize();
164  radius = (float) length;
165 }
166 
167 void
168 Bolt::SetTextureOffset(double from, double to)
169 {
170  vset.tu[0] = (float) from;
171  vset.tu[1] = (float) to;
172  vset.tu[2] = (float) to;
173  vset.tu[3] = (float) from;
174 }
175 
176