Update to 2.0.0 tree from current Fremantle build

[opencv] / 3rdparty / include / OpenEXR / ImathVecAlgo.h

diff --git a/3rdparty/include/OpenEXR/ImathVecAlgo.h b/3rdparty/include/OpenEXR/ImathVecAlgo.h
new file mode 100644 (file)
index 0000000..9b726a7
--- /dev/null
+++ b/3rdparty/include/OpenEXR/ImathVecAlgo.h
@@ -0,0 +1,146 @@
+///////////////////////////////////////////////////////////////////////////
+//
+// 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