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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]));
50 octant
.init(Vector3(mid
[0], min
[1], mid
[2]),
51 Vector3(max
[0], mid
[1], max
[2]));
55 octant
.init(mid
, max
);
59 octant
.init(Vector3(min
[0], mid
[1], mid
[2]),
60 Vector3(mid
[0], max
[1], max
[2]));
64 octant
.init(min
, mid
);
68 octant
.init(Vector3(mid
[0], min
[1], min
[2]),
69 Vector3(max
[0], mid
[1], mid
[2]));
73 octant
.init(Vector3(mid
[0], mid
[1], min
[2]),
74 Vector3(max
[0], max
[1], mid
[2]));
78 octant
.init(Vector3(min
[0], mid
[1], min
[2]),
79 Vector3(mid
[0], max
[1], mid
[2]));
85 void Aabb::getCorners(Vector3 corners
[8]) const
87 corners
[0][0] = min
[0]; corners
[0][1] = min
[1]; corners
[0][2] = max
[2];
88 corners
[1][0] = max
[0]; corners
[1][1] = min
[1]; corners
[1][2] = max
[2];
89 corners
[2][0] = max
[0]; corners
[2][1] = max
[1]; corners
[2][2] = max
[2];
90 corners
[3][0] = min
[0]; corners
[3][1] = max
[1]; corners
[3][2] = max
[2];
91 corners
[4][0] = min
[0]; corners
[4][1] = min
[1]; corners
[4][2] = min
[2];
92 corners
[5][0] = max
[0]; corners
[5][1] = min
[1]; corners
[5][2] = min
[2];
93 corners
[6][0] = max
[0]; corners
[6][1] = max
[1]; corners
[6][2] = min
[2];
94 corners
[7][0] = min
[0]; corners
[7][1] = max
[1]; corners
[7][2] = min
[2];
98 void Aabb::encloseVertices(const Vector3 vertices
[], unsigned count
)
103 for (unsigned i
= 1; i
< count
; ++i
)
105 if (vertices
[i
][0] < min
[0]) min
[0] = vertices
[i
][0];
106 if (vertices
[i
][0] > max
[0]) max
[0] = vertices
[i
][0];
107 if (vertices
[i
][1] < min
[1]) min
[1] = vertices
[i
][1];
108 if (vertices
[i
][1] > max
[1]) max
[1] = vertices
[i
][1];
109 if (vertices
[i
][2] < min
[2]) min
[2] = vertices
[i
][2];
110 if (vertices
[i
][2] > max
[2]) max
[2] = vertices
[i
][2];
115 void Aabb::draw(Scalar alpha
) const
117 Scalar vertices
[] = {min
[0], min
[1], min
[2],
118 min
[0], max
[1], min
[2],
119 max
[0], max
[1], min
[2],
120 max
[0], min
[1], min
[2],
121 min
[0], max
[1], max
[2],
122 min
[0], min
[1], max
[2],
123 max
[0], min
[1], max
[2],
124 max
[0], max
[1], max
[2]};
126 GLubyte indices
[] = {0, 1, 2, 3,
133 glEnableClientState(GL_VERTEX_ARRAY
);
134 glDisableClientState(GL_TEXTURE_COORD_ARRAY
);
135 glVertexPointer(3, GL_SCALAR
, 0, vertices
);
137 glPolygonMode(GL_FRONT_AND_BACK
, GL_LINE
);
138 Texture::resetBind();
140 glDrawElements(GL_QUADS
, sizeof(indices
), GL_UNSIGNED_BYTE
, indices
);
142 glEnableClientState(GL_TEXTURE_COORD_ARRAY
);
143 //glDisableClientState(GL_VERTEX_ARRAY);
145 glPolygonMode(GL_FRONT_AND_BACK
, GL_FILL
);
148 bool Aabb::isVisible(const Frustum
& frustum
) const
150 return frustum
.contains(*this);
156 /** vim: set ts=4 sw=4 tw=80: *************************************************/
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