108 lines
2.5 KiB
Text
108 lines
2.5 KiB
Text
/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file boundingBox.I
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* @author drose
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* @date 2007-05-31
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*/
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/**
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* Constructs an empty box object.
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*/
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INLINE_MATHUTIL BoundingBox::
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BoundingBox() {
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}
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/**
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* Constructs a specific box object.
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*/
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INLINE_MATHUTIL BoundingBox::
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BoundingBox(const LPoint3 &min, const LPoint3 &max) :
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_min(min), _max(max)
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{
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#ifdef NDEBUG
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_flags = F_empty;
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nassertv(!_min.is_nan() && !_max.is_nan());
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nassertv(_min[0] <= _max[0] && _min[1] <= _max[1] && _min[2] <= _max[2]);
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#endif // NDEBUG
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_flags = 0;
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}
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/**
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* An inline accessor for the minimum value. get_min() would also work, but
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* it is a virtual non-inline method.
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*/
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INLINE_MATHUTIL const LPoint3 &BoundingBox::
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get_minq() const {
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nassertr(!is_empty(), _min);
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nassertr(!is_infinite(), _min);
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return _min;
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}
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/**
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* An inline accessor for the maximum value. get_max() would also work, but
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* it is a virtual non-inline method.
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*/
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INLINE_MATHUTIL const LPoint3 &BoundingBox::
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get_maxq() const {
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nassertr(!is_empty(), _max);
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nassertr(!is_infinite(), _max);
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return _max;
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}
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/**
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* Returns 8: the number of vertices of a rectangular solid.
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*/
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INLINE_MATHUTIL int BoundingBox::
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get_num_points() const {
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return 8;
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}
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/**
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* Returns the nth vertex of the rectangular solid.
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*/
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INLINE_MATHUTIL LPoint3 BoundingBox::
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get_point(int n) const {
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nassertr(n >= 0 && n < 8, LPoint3::zero());
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// We do some trickery assuming that _min and _max are consecutive in
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// memory.
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const LPoint3 *a = &_min;
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return LPoint3(a[(n>>2)&1][0], a[(n>>1)&1][1], a[(n)&1][2]);
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}
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/**
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* Returns 6: the number of faces of a rectangular solid.
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*/
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INLINE_MATHUTIL int BoundingBox::
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get_num_planes() const {
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return 6;
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}
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/**
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* Returns the nth face of the rectangular solid.
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*/
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INLINE_MATHUTIL LPlane BoundingBox::
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get_plane(int n) const {
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nassertr(n >= 0 && n < 6, LPlane());
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return LPlane(get_point(plane_def[n][0]),
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get_point(plane_def[n][1]),
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get_point(plane_def[n][2]));
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}
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/**
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* Sets the min and max point of the rectangular solid.
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*/
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INLINE_MATHUTIL void BoundingBox::
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set_min_max(const LPoint3 &min, const LPoint3 &max) {
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nassertv(!min.is_nan() && !max.is_nan());
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nassertv(min[0] <= max[0] && min[1] <= max[1] && min[2] <= max[2]);
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_min = min;
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_max = max;
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_flags = 0;
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}
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