/usr/include/OpenEXR/ImathVecAlgo.h is in libilmbase-dev 1.0.1-6.1.
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 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 | ///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2002, Industrial Light & Magic, a division of Lucas
// Digital Ltd. LLC
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Industrial Light & Magic nor the names of
// its contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
///////////////////////////////////////////////////////////////////////////
#ifndef INCLUDED_IMATHVECALGO_H
#define INCLUDED_IMATHVECALGO_H
//-------------------------------------------------------------------------
//
// This file contains algorithms applied to or in conjunction
// with points (Imath::Vec2 and Imath::Vec3).
// The assumption made is that these functions are called much
// less often than the basic point functions or these functions
// require more support classes.
//
//-------------------------------------------------------------------------
#include "ImathVec.h"
#include "ImathLimits.h"
namespace Imath {
//--------------------------------------------------------------
// Find the projection of vector t onto vector s (Vec2 and Vec3)
//--------------------------------------------------------------
template <class Vec> Vec project (const Vec &s, const Vec &t);
//----------------------------------------------
// Find a vector which is perpendicular to s and
// in the same plane as s and t (Vec2 and Vec3)
//----------------------------------------------
template <class Vec> Vec orthogonal (const Vec &s, const Vec &t);
//-----------------------------------------------
// Find the direction of a ray s after reflection
// off a plane with normal t (Vec2 and Vec3)
//-----------------------------------------------
template <class Vec> Vec reflect (const Vec &s, const Vec &t);
//----------------------------------------------------------------------
// Find the vertex of triangle (v0, v1, v2), which is closest to point p
// (Vec2 and Vec3).
//----------------------------------------------------------------------
template <class Vec> Vec closestVertex (const Vec &v0,
const Vec &v1,
const Vec &v2,
const Vec &p);
//---------------
// Implementation
//---------------
template <class Vec>
Vec
project (const Vec &s, const Vec &t)
{
Vec sNormalized = s.normalized();
return sNormalized * (sNormalized ^ t);
}
template <class Vec>
Vec
orthogonal (const Vec &s, const Vec &t)
{
return t - project (s, t);
}
template <class Vec>
Vec
reflect (const Vec &s, const Vec &t)
{
return s - typename Vec::BaseType(2) * (s - project(t, s));
}
template <class Vec>
Vec
closestVertex(const Vec &v0,
const Vec &v1,
const Vec &v2,
const Vec &p)
{
Vec nearest = v0;
typename Vec::BaseType neardot = (v0 - p).length2();
typename Vec::BaseType tmp = (v1 - p).length2();
if (tmp < neardot)
{
neardot = tmp;
nearest = v1;
}
tmp = (v2 - p).length2();
if (tmp < neardot)
{
neardot = tmp;
nearest = v2;
}
return nearest;
}
} // namespace Imath
#endif
|