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82 lines
2.1 KiB
C++
82 lines
2.1 KiB
C++
/* ResidualVM - A 3D game interpreter
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*
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* ResidualVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include "math/aabb.h"
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namespace Math {
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AABB::AABB() : _valid(false) {
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}
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AABB::AABB(const Math::Vector3d &min, const Math::Vector3d &max) : _valid(true), _min(min), _max(max) {
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}
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void AABB::reset() {
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_valid = false;
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}
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void AABB::expand(const Math::Vector3d &v) {
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if (!_valid) {
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_min = v;
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_max = v;
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_valid = true;
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} else {
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if (v.x() < _min.x())
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_min.x() = v.x();
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if (v.y() < _min.y())
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_min.y() = v.y();
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if (v.z() < _min.z())
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_min.z() = v.z();
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if (v.x() > _max.x())
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_max.x() = v.x();
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if (v.y() > _max.y())
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_max.y() = v.y();
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if (v.z() > _max.z())
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_max.z() = v.z();
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}
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}
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void AABB::transform(const Math::Matrix4 &matrix) {
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Math::Vector3d min = _min;
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Math::Vector3d max = _max;
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reset();
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Math::Vector3d verts[8];
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verts[0].set(min.x(), min.y(), min.z());
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verts[1].set(max.x(), min.y(), min.z());
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verts[2].set(min.x(), max.y(), min.z());
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verts[3].set(min.x(), min.y(), max.z());
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verts[4].set(max.x(), max.y(), min.z());
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verts[5].set(max.x(), min.y(), max.z());
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verts[6].set(min.x(), max.y(), max.z());
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verts[7].set(max.x(), max.y(), max.z());
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for (int i = 0; i < 8; ++i) {
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matrix.transform(&verts[i], true);
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expand(verts[i]);
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}
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}
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}
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