miscellaneous cleanup
[chaz/yoink] / src / Moof / Aabb.cc
1
2 /*******************************************************************************
3
4 Copyright (c) 2009, Charles McGarvey
5 All rights reserved.
6
7 Redistribution and use in source and binary forms, with or without
8 modification, are permitted provided that the following conditions are met:
9
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.
15
16 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
20 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
23 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26
27 *******************************************************************************/
28
29 #include "Aabb.hh"
30 #include "Camera.hh"
31 #include "OpenGL.hh"
32 #include "Texture.hh"
33
34
35 namespace Mf {
36
37
38 void Aabb::getOctant(Aabb& octant, int num) const
39 {
40 Vector3 mid = getCenter();
41
42 switch (num)
43 {
44 case 0:
45 octant.init(Vector3(min[0], min[1], mid[2]),
46 Vector3(mid[0], mid[1], max[2]));
47 break;
48 case 1:
49 octant.init(Vector3(mid[0], min[1], mid[2]),
50 Vector3(max[0], mid[1], max[2]));
51 break;
52 case 2:
53 octant.init(mid, max);
54 break;
55 case 3:
56 octant.init(Vector3(min[0], mid[1], mid[2]),
57 Vector3(mid[0], max[1], max[2]));
58 break;
59 case 4:
60 octant.init(min, mid);
61 break;
62 case 5:
63 octant.init(Vector3(mid[0], min[1], min[2]),
64 Vector3(max[0], mid[1], mid[2]));
65 break;
66 case 6:
67 octant.init(Vector3(mid[0], mid[1], min[2]),
68 Vector3(max[0], max[1], mid[2]));
69 break;
70 case 7:
71 octant.init(Vector3(min[0], mid[1], min[2]),
72 Vector3(mid[0], max[1], mid[2]));
73 break;
74 }
75 }
76
77
78 void Aabb::getCorners(Vector3 corners[8]) const
79 {
80 corners[0][0] = min[0]; corners[0][1] = min[1]; corners[0][2] = max[2];
81 corners[1][0] = max[0]; corners[1][1] = min[1]; corners[1][2] = max[2];
82 corners[2][0] = max[0]; corners[2][1] = max[1]; corners[2][2] = max[2];
83 corners[3][0] = min[0]; corners[3][1] = max[1]; corners[3][2] = max[2];
84 corners[4][0] = min[0]; corners[4][1] = min[1]; corners[4][2] = min[2];
85 corners[5][0] = max[0]; corners[5][1] = min[1]; corners[5][2] = min[2];
86 corners[6][0] = max[0]; corners[6][1] = max[1]; corners[6][2] = min[2];
87 corners[7][0] = min[0]; corners[7][1] = max[1]; corners[7][2] = min[2];
88 }
89
90
91 void Aabb::encloseVertices(const Vector3 vertices[], unsigned count)
92 {
93 min = vertices[0];
94 max = vertices[0];
95
96 for (unsigned i = 1; i < count; ++i)
97 {
98 if (vertices[i][0] < min[0]) min[0] = vertices[i][0];
99 if (vertices[i][0] > max[0]) max[0] = vertices[i][0];
100 if (vertices[i][1] < min[1]) min[1] = vertices[i][1];
101 if (vertices[i][1] > max[1]) max[1] = vertices[i][1];
102 if (vertices[i][2] < min[2]) min[2] = vertices[i][2];
103 if (vertices[i][2] > max[2]) max[2] = vertices[i][2];
104 }
105 }
106
107
108 void Aabb::draw(Scalar alpha) const
109 {
110 Scalar vertices[] = {min[0], min[1], min[2],
111 min[0], max[1], min[2],
112 max[0], max[1], min[2],
113 max[0], min[1], min[2],
114 min[0], max[1], max[2],
115 min[0], min[1], max[2],
116 max[0], min[1], max[2],
117 max[0], max[1], max[2]};
118
119 GLubyte indices[] = {0, 1, 2, 3,
120 1, 2, 7, 4,
121 3, 0, 5, 6,
122 2, 3, 6, 7,
123 5, 0, 1, 4,
124 4, 5, 6, 7};
125
126 glEnableClientState(GL_VERTEX_ARRAY);
127 glDisableClientState(GL_TEXTURE_COORD_ARRAY);
128 glVertexPointer(3, GL_SCALAR, 0, vertices);
129
130 glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
131 Texture::resetBind();
132
133 glDrawElements(GL_QUADS, sizeof(indices), GL_UNSIGNED_BYTE, indices);
134
135 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
136 //glDisableClientState(GL_VERTEX_ARRAY);
137
138 glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
139 }
140
141 bool Aabb::isVisible(const Camera& cam) const
142 {
143 return cam.getFrustum().contains(*this);
144 }
145
146
147 } // namespace Mf
148
149 /** vim: set ts=4 sw=4 tw=80: *************************************************/
150
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