Changeset c9b843 for src/Fragmentation/Summation/SetValues/SamplingGridProperties.cpp

Timestamp:

May 18, 2016, 10:03:09 PM (9 years ago)

Author:

Frederik Heber <heber@…>

Children:

c805f7

Parents:

706d48

git-author:

Frederik Heber <heber@…> (03/10/16 14:52:28)

git-committer:

Frederik Heber <heber@…> (05/18/16 22:03:09)

Message:

Moved getNearestLowerGridPoint and ..Higher:: from SamplingGrid to SamplingGridProperties.

• we only use functions from ..Properties anyway.

File:

• src/Fragmentation/Summation/SetValues/SamplingGridProperties.cpp (modified) (1 diff)

src/Fragmentation/Summation/SetValues/SamplingGridProperties.cpp

@@ -101 +101 @@
 
 
+double SamplingGridProperties::getNearestLowerGridPoint(
+    const double value, const size_t axis) const
+{
+  const double length = getTotalLengthPerAxis(axis);
+  if ((fabs(length) < std::numeric_limits<double>::epsilon()) || (getGridPointsPerAxis() == 0))
+    return begin[axis];
+  if ((value - end[axis]) > -std::numeric_limits<double>::epsilon()*1.e4)
+    return end[axis];
+  const double offset = value - begin[axis];
+  if (offset < std::numeric_limits<double>::epsilon()*1.e4)
+    return begin[axis];
+  // modify value a little if value actually has been on a grid point but
+  // perturbed by numerical rounding: here up, as we always go lower
+  const double factor =
+      floor((double)getGridPointsPerAxis()*(offset/length)
+          +std::numeric_limits<double>::epsilon()*1.e4);
+  return begin[axis]+factor*getDeltaPerAxis(axis);
+}
+
+double SamplingGridProperties::getNearestHigherGridPoint(
+    const double value, const size_t axis) const
+{
+  const double length = getTotalLengthPerAxis(axis);
+  if ((fabs(length) < std::numeric_limits<double>::epsilon()) || (getGridPointsPerAxis() == 0))
+    return end[axis];
+  if ((value - end[axis]) > -std::numeric_limits<double>::epsilon()*1.e4)
+    return end[axis];
+  const double offset = value - begin[axis];
+  if (offset < std::numeric_limits<double>::epsilon()*1.e4)
+    return begin[axis];
+  // modify value a little if value actually has been on a grid point but
+  // perturbed by numerical rounding: here down, as we always go higher
+  const double factor =
+      ceil((double)getGridPointsPerAxis()*(offset/length)
+          -std::numeric_limits<double>::epsilon()*1.e4);
+  return begin[axis]+factor*getDeltaPerAxis(axis);
+}
+
+
 template<> SamplingGridProperties ZeroInstance<SamplingGridProperties>()
 {