New FsGrid operators and lerp method

fsgrid.hpp

@@ -141,8 +141,21 @@ template <typename T, int stencil> class FsGrid : public FsGridTools{
        * \param MPI_Comm The MPI communicator this grid should use.
        * \param isPeriodic An array specifying, for each dimension, whether it is to be treated as periodic.
        */
-   FsGrid(std::array<int32_t,3> globalSize, MPI_Comm parent_comm, std::array<bool,3> isPeriodic, FsGridCouplingInformation& coupling)
-            : globalSize(globalSize),coupling(coupling) {
+      FsGrid(std::array<int32_t, 3> globalSize, MPI_Comm parent_comm, std::array<bool, 3> isPeriodic, FsGridCouplingInformation &coupling)
+          : globalSize(globalSize), coupling(coupling){
+         this->parentCom = parent_comm;
+         this->init(parent_comm,isPeriodic);
+      }
+
+      //Copy constructor
+      FsGrid(const FsGrid<T, stencil> &other) 
+         : periodic(other.periodic), globalSize(other.globalSize),  coupling(other.coupling){
+         this->parentCom=other.parentCom;
+         init(parentCom,periodic);
+         this->data = other.data;
+      }
+
+      void init(MPI_Comm &parent_comm,std::array<bool, 3> isPeriodic){
          int status;
          int size;
 
@@ -965,27 +978,60 @@ template <typename T, int stencil> class FsGrid : public FsGridTools{
       //! Copy the entire data from another FsGrid of the same signature over.
       FsGrid<T, stencil>& operator=(const FsGrid<T, stencil>& other) {
 
-         // Don't copy if sizes mismatch.
-         // (Should this instead crash the program?)
-         if(other.localSize[0] != localSize[0]   ||
-            other.localSize[1] != localSize[1]   ||
-            other.localSize[2] != localSize[2]) {
-            return *this;
-         }
+         // Fail if sizes mismatch.
+         assert(other.localSize[0] == this->localSize[0]);
+         assert(other.localSize[1] == this->localSize[1]);
+         assert(other.localSize[2] == this->localSize[2]);
          data = other.data;
+         return *this;
+      }
 
+      FsGrid<T, stencil>& operator+=(const FsGrid<T, stencil>& rhs) {
+         assert(this->data.size()==rhs.data.size());
+         for (size_t i=0; i< this->data.size(); i++){
+            this->data[i] = this->data[i]+rhs.data[i];
+         }
+         return *this;
+      }
+
+      FsGrid<T, stencil>& operator-=(const FsGrid<T, stencil>& rhs) {
+         assert(this->data.size()==rhs.data.size());
+         for (size_t i=0; i< this->data.size(); i++){
+            this->data[i] = this->data[i]-rhs.data[i];
+         }
+         return *this;
+      }
+
+      FsGrid<T, stencil>& operator*=(const FsGrid<T, stencil>& rhs) {
+         assert(this->data.size()==rhs.data.size());
+         for (size_t i=0; i< this->data.size(); i++){
+            this->data[i] = this->data[i]*rhs.data[i];
+         }
+         return *this;
+      }
+
+      FsGrid<T, stencil>& operator/=(const FsGrid<T, stencil>& rhs) {
+         assert(this->data.size()==rhs.data.size());
+         for (size_t i=0; i< this->data.size(); i++){
+            this->data[i] = this->data[i]/rhs.data[i];
+         }
+         return *this;
+      }
+
+      template <typename S, typename std::enable_if<std::is_arithmetic<S>::value>::type * = nullptr>
+      FsGrid<T, stencil> &operator*(S mult){
+         for (size_t i=0; i< this->data.size(); i++){
+            this->data[i] = this->data[i]*mult;
+         }
          return *this;
       }
-
-
-
 
    private:
       //! MPI Cartesian communicator used in this grid
-      MPI_Comm comm3d;
-      int rank; //!< This task's rank in the communicator
-      std::vector<MPI_Request> requests;
-      uint numRequests;
+         MPI_Comm comm3d, parentCom;
+         int rank; //!< This task's rank in the communicator
+         std::vector<MPI_Request> requests;
+         uint numRequests;
 
       std::array<int, 27> neighbour; //!< Tasks of the 26 neighbours (plus ourselves)
       std::vector<char> neighbour_index; //!< Lookup table from rank to index in the neighbour array
@@ -1040,3 +1086,108 @@ template <typename T, int stencil> class FsGrid : public FsGridTools{
          array[2] = a;
       }
 };
+
+
+//Array Operator Overloads
+template <typename T, size_t N>
+static inline std::array<T,N> operator+(const std::array<T, N>& arr1, const std::array<T, N>& arr2){
+   std::array<T, N> res;
+    for (size_t i = 0; i < N; ++i){
+        res[i] = arr1[i] + arr2[i];
+      }
+    return res; 
+}
+
+template <typename T, size_t N>
+static inline std::array<T,N> operator-(const std::array<T, N>& arr1, const std::array<T, N>& arr2){
+   std::array<T, N> res;
+    for (size_t i = 0; i < N; ++i){
+        res[i] = arr1[i] - arr2[i];
+      }
+    return res; 
+}
+
+template <typename T, size_t N>
+static inline std::array<T, N> operator*(const std::array<T, N> &arr1, const std::array<T, N> &arr2){
+   std::array<T, N> res;
+   for (size_t i = 0; i < N; ++i){
+      res[i] = arr1[i] * arr2[i];
+   }
+   return res;
+}
+
+template <typename T, size_t N>
+static inline std::array<T,N> operator/(const std::array<T, N>& arr1, const std::array<T, N>& arr2){
+   std::array<T, N> res;
+    for (size_t i = 0; i < N; ++i){
+        res[i] = arr1[i] / arr2[i];
+      }
+    return res; 
+}
+
+template <typename T, size_t N,typename S,typename std::enable_if<std::is_arithmetic<S>::value>::type* = nullptr>
+std::array<T,N> operator*(std::array<T, N>& arr, S mult){
+    for (size_t i = 0; i < N; ++i)
+        arr[i]*=mult;
+    return arr; 
+}
+
+
+
+// FsGrid Operator Overloads
+template <class T, int stencil>
+static inline FsGrid<T, stencil> operator+(const FsGrid<T, stencil> &lhs, const FsGrid<T, stencil> &rhs){
+   FsGrid<T, stencil> a(lhs);
+   return a+=rhs;
+}
+
+template <class T, int stencil>
+static inline FsGrid<T, stencil> operator-(const FsGrid<T, stencil> &lhs, const FsGrid<T, stencil> &rhs){
+   FsGrid<T, stencil> a(lhs);
+   return a-=rhs;
+}
+
+template <class T, int stencil>
+static inline FsGrid<T, stencil> operator*(const FsGrid<T, stencil> &lhs, const FsGrid<T, stencil> &rhs){
+   FsGrid<T, stencil> a(lhs);
+   return a *= rhs;
+}
+
+template <class T, int stencil>
+static inline FsGrid<T, stencil> operator/(const FsGrid<T, stencil> &lhs, const FsGrid<T, stencil> &rhs){
+   FsGrid<T, stencil> a(lhs);
+   return a /= rhs;
+}
+
+template <class T, int stencil,typename S,typename std::enable_if<std::is_arithmetic<S>::value>::type* = nullptr>
+static inline FsGrid<T, stencil>  lerp_t(const  FsGrid<T, stencil> &lhs, const FsGrid<T, stencil> &rhs,S t0, S t1,S t){
+
+   //Sanity check for timestamps. If sizes mismatch then this will make it crash in the '=' operator
+   bool doAble = (t0<=t) && (t<=t1);
+   if (!doAble){
+      #pragma message(": warning<FsGrid lerp_t>: We should probably crash here instead of returning nonesense")
+      //Do we crash here?
+      std::cerr<<"Interpolation not doable in the range of "<<t0<<" "<<t<<" "<<t1<<std::endl; 
+      return lhs;
+   }
+
+   //First let's create the targer grid by copying one of the inputs
+   FsGrid<T, stencil> targetGrid(lhs);
+
+   //Let's now calculate the intepolation weights;
+   S range=t1-t0;
+   S d0= abs(t-t0);
+   S d1= abs(t-t1);
+   S w0= 1.- (d0/range);
+   S w1= 1.- (d1/range);
+
+   //Do interpolate-targetGrid=w0*lhs+w1*rhs
+   FsGrid<T, stencil> fsgrid_tmp(lhs);
+   targetGrid=fsgrid_tmp*w0; 
+   fsgrid_tmp=rhs;
+   targetGrid += fsgrid_tmp * w1;
+
+   return targetGrid;
+}
+
+

tests/Makefile

@@ -1,14 +1,16 @@
-CXX=CC
+CXX=mpic++
 CXXFLAGS= -O3 -std=c++11 -march=native -g -Wall
 
-all: benchmark test ddtest
+all: benchmark test ddtest operators
 
 benchmark: benchmark.cpp ../fsgrid.hpp
 	$(CXX) $(CXXFLAGS) -o $@ $<
+operators: operators.cpp ../fsgrid.hpp
+	$(CXX) $(CXXFLAGS) -o $@ $<
 test: test.cpp ../fsgrid.hpp
 	$(CXX) $(CXXFLAGS) -o $@ $<
 ddtest: ddtest.cpp
 	$(CXX) $(CXXFLAGS) -o $@ $<
 
 clean:
-	-rm test
+	-rm test benchmark ddtest operators

tests/benchmark.cpp

@@ -22,8 +22,9 @@
 */
 
 template<class T, int stencil> void timeit(std::array<int32_t, 3> globalSize, std::array<bool, 3> isPeriodic, int iterations){
-   double t1,t2;   
-   FsGrid<T ,stencil> testGrid(globalSize, MPI_COMM_WORLD, isPeriodic);
+   double t1,t2;
+   FsGridCouplingInformation gridCoupling;
+   FsGrid<T ,stencil> testGrid(globalSize, MPI_COMM_WORLD, isPeriodic,gridCoupling);
    int rank,size;
    MPI_Comm_rank(MPI_COMM_WORLD, &rank);
    MPI_Comm_size(MPI_COMM_WORLD, &size);

tests/operators.cpp

@@ -0,0 +1,81 @@
+#include <iostream>
+#include "../fsgrid.hpp"
+/*
+  Copyright (C) 2016 Finnish Meteorological Institute
+  Copyright (C) 2016 CSC -IT Center for Science 
+
+  This file is part of fsgrid
+
+  fsgrid 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 3 of the License, or
+  (at your option) any later version.
+
+  fsgrid 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 fsgrid.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+
+int main(int argc, char** argv) {
+   typedef float Real;
+   MPI_Init(&argc,&argv);
+
+   int rank,size;
+   MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+   MPI_Comm_size(MPI_COMM_WORLD, &size);
+
+   // Create a 8×8 Testgrid
+   std::array<int32_t, 3> globalSize{2000,1000,1};
+   std::array<int32_t, 3> globalSize2{3000,1000,1};
+   std::array<bool, 3> isPeriodic{false,false,true};
+
+
+
+   FsGridCouplingInformation gridCoupling;
+   FsGrid<std::array<Real, 1>, 2> A(globalSize, MPI_COMM_WORLD, isPeriodic, gridCoupling);
+   FsGrid<std::array<Real, 1>, 2> B(globalSize, MPI_COMM_WORLD, isPeriodic, gridCoupling);
+   FsGrid<std::array<Real, 1>, 2> C(globalSize, MPI_COMM_WORLD, isPeriodic, gridCoupling);
+   FsGrid<std::array<Real, 1>, 2> D(globalSize2, MPI_COMM_WORLD, isPeriodic, gridCoupling);
+
+  //  FsGrid<std::array<float, 1>, 2> newGuy(A + B);
+   //  + 
+   A=B+C;
+  //  +=
+  A+=B;
+  // -
+  A=A-C;
+  // -=
+  A-=B;
+  D=D*3.0;
+  C=lerp_t(A,B,5.,10.,7.);
+  //supposed to fail;
+  // A=B+D;
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+   MPI_Finalize();
+   return 0;
+}

tests/test.cpp

@@ -33,8 +33,9 @@ int main(int argc, char** argv) {
    // Create a 8×8 Testgrid
    std::array<int32_t, 3> globalSize{20,20,1};
    std::array<bool, 3> isPeriodic{false,false,true};
+   FsGridCouplingInformation gridCoupling;
    {
-      FsGrid<int,1> testGrid(globalSize, MPI_COMM_WORLD, isPeriodic);
+      FsGrid<int,1> testGrid(globalSize, MPI_COMM_WORLD, isPeriodic,gridCoupling);
 /*
       if(rank == 0) {
          std::cerr << " --- Test task mapping functions ---" << std::endl;
@@ -190,9 +191,7 @@ int main(int argc, char** argv) {
          }
       }
    }
-
 
-
       MPI_Finalize();
 
       return 0;