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Dogcows Code - chaz/yoink/blob - src/Moof/Aabb.cc
2 /*******************************************************************************
4 Copyright (c) 2009, Charles McGarvey
7 Redistribution and use in source and binary forms, with or without
8 modification, are permitted provided that the following conditions are met:
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.
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.
27 *******************************************************************************/
38 void Aabb::getOctant(Aabb
& octant
, int num
) const
40 Vector3 mid
= getCenter();
45 octant
.init(Vector3(min
[0], min
[1], mid
[2]),
46 Vector3(mid
[0], mid
[1], max
[2]));
49 octant
.init(Vector3(mid
[0], min
[1], mid
[2]),
50 Vector3(max
[0], mid
[1], max
[2]));
53 octant
.init(mid
, max
);
56 octant
.init(Vector3(min
[0], mid
[1], mid
[2]),
57 Vector3(mid
[0], max
[1], max
[2]));
60 octant
.init(min
, mid
);
63 octant
.init(Vector3(mid
[0], min
[1], min
[2]),
64 Vector3(max
[0], mid
[1], mid
[2]));
67 octant
.init(Vector3(mid
[0], mid
[1], min
[2]),
68 Vector3(max
[0], max
[1], mid
[2]));
71 octant
.init(Vector3(min
[0], mid
[1], min
[2]),
72 Vector3(mid
[0], max
[1], mid
[2]));
78 void Aabb::getCorners(Vector3 corners
[8]) const
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];
91 void Aabb::encloseVertices(const Vector3 vertices
[], unsigned count
)
96 for (unsigned i
= 1; i
< count
; ++i
)
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];
108 void Aabb::draw(Scalar alpha
) const
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]};
119 GLubyte indices
[] = {0, 1, 2, 3,
126 glEnableClientState(GL_VERTEX_ARRAY
);
127 glDisableClientState(GL_TEXTURE_COORD_ARRAY
);
128 glVertexPointer(3, GL_SCALAR
, 0, vertices
);
130 glPolygonMode(GL_FRONT_AND_BACK
, GL_LINE
);
131 Texture::resetBind();
133 glDrawElements(GL_QUADS
, sizeof(indices
), GL_UNSIGNED_BYTE
, indices
);
135 glEnableClientState(GL_TEXTURE_COORD_ARRAY
);
136 //glDisableClientState(GL_VERTEX_ARRAY);
138 glPolygonMode(GL_FRONT_AND_BACK
, GL_FILL
);
141 bool Aabb::isVisible(const Frustum
& frustum
) const
143 return frustum
.contains(*this);
149 /** vim: set ts=4 sw=4 tw=80: *************************************************/
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