frohlich
d11954e80c
Modified Files: simgear/math/SGBox.hxx simgear/math/SGIntersect.hxx simgear/math/SGLineSegment.hxx simgear/math/SGMatrix.hxx simgear/math/SGPlane.hxx simgear/math/SGRay.hxx simgear/math/SGSphere.hxx simgear/math/SGVec2.hxx simgear/math/SGVec3.hxx simgear/math/SGVec4.hxx
75 lines
2.3 KiB
C++
75 lines
2.3 KiB
C++
// Copyright (C) 2006 Mathias Froehlich - Mathias.Froehlich@web.de
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library 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 GNU
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// Library 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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#ifndef SGPlane_H
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#define SGPlane_H
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template<typename T>
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class SGPlane {
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public:
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SGPlane()
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{ }
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SGPlane(const SGVec3<T>& normal, const T& dist) :
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_normal(normal), _dist(dist)
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{ }
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SGPlane(const SGVec3<T>& normal, const SGVec3<T>& point) :
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_normal(normal), _dist(-dot(normal, point))
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{ }
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SGPlane(const SGVec3<T> vertices[3]) :
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_normal(normalize(cross(vertices[1] - vertices[0],
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vertices[2] - vertices[0]))),
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_dist(-dot(_normal, vertices[0]))
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{ }
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SGPlane(const SGVec3<T>& v0, const SGVec3<T>& v1, const SGVec3<T>& v2) :
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_normal(normalize(cross(v1 - v0, v2 - v0))),
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_dist(-dot(_normal, v0))
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{ }
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template<typename S>
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explicit SGPlane(const SGPlane<S>& plane) :
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_normal(plane.getNormal()), _dist(plane.getDist())
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{ }
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void setNormal(const SGVec3<T>& normal)
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{ _normal = normal; }
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const SGVec3<T>& getNormal() const
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{ return _normal; }
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void setDist(const T& dist)
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{ _dist = dist; }
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const T& getDist() const
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{ return _dist; }
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/// Return a point on the plane
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SGVec3<T> getPointOnPlane() const
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{ return -_dist*_normal; }
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/// That is the distance where we measure positive in direction of the normal
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T getPositiveDist() const
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{ return -_dist; }
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/// That is the distance where we measure positive in the oposite direction
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/// of the normal.
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const T& getNegativeDist() const
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{ return _dist; }
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private:
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// That ordering is important because of one constructor
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SGVec3<T> _normal;
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T _dist;
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};
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#endif
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