/usr/include/simgear/scene/tgdb/SGDirectionalLightBin.hxx is in libsimgear-dev 3.4.0-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 | /* -*-c++-*-
*
* Copyright (C) 2006-2007 Mathias Froehlich
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
*/
#ifndef SG_DIRECTIONAL_LIGHT_BIN_HXX
#define SG_DIRECTIONAL_LIGHT_BIN_HXX
class SGDirectionalLightBin {
public:
struct Light {
Light(const SGVec3f& p, const SGVec3f& n, const SGVec4f& c) :
position(p), normal(n), color(c)
{ }
SGVec3f position;
SGVec3f normal;
SGVec4f color;
};
typedef std::vector<Light> LightList;
void insert(const Light& light)
{ _lights.push_back(light); }
void insert(const SGVec3f& p, const SGVec3f& n, const SGVec4f& c)
{ insert(Light(p, n, c)); }
unsigned getNumLights() const
{ return _lights.size(); }
const Light& getLight(unsigned i) const
{ return _lights[i]; }
// helper for sorting lights back to front ...
struct DirectionLess {
DirectionLess(const SGVec3f& direction) :
_direction(direction)
{ }
inline bool operator() (const Light& l, const Light& r) const
{ return dot(_direction, l.position) < dot(_direction, r.position); }
private:
SGVec3f _direction;
};
typedef std::multiset<Light,DirectionLess> LightSet;
LightList getSortedLights(const SGVec3f& sortDirection) const
{
LightSet lightSet = LightSet(DirectionLess(sortDirection));
for (unsigned i = 0; i < _lights.size(); ++i)
lightSet.insert(_lights[i]);
LightList sortedLights;
sortedLights.reserve(_lights.size());
for (LightSet::const_iterator i = lightSet.begin(); i != lightSet.end(); ++i)
sortedLights.push_back(*i);
return sortedLights;
}
private:
LightList _lights;
};
#endif
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