ExaFMM 1
Fast-multipole Method for exascale systems
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00001 /* 00002 Copyright (C) 2011 by Rio Yokota, Simon Layton, Lorena Barba 00003 00004 Permission is hereby granted, free of charge, to any person obtaining a copy 00005 of this software and associated documentation files (the "Software"), to deal 00006 in the Software without restriction, including without limitation the rights 00007 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 00008 copies of the Software, and to permit persons to whom the Software is 00009 furnished to do so, subject to the following conditions: 00010 00011 The above copyright notice and this permission notice shall be included in 00012 all copies or substantial portions of the Software. 00013 00014 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 00015 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 00016 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 00017 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 00018 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 00019 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 00020 THE SOFTWARE. 00021 */ 00022 #include "serialfmm.h" 00023 #ifdef VTK 00024 #include "vtk.h" 00025 #endif 00026 00027 int main() { 00028 const int numBodies = 10000; 00029 const int numTarget = 100; 00030 IMAGES = 0; 00031 THETA = 1 / sqrt(4); 00032 Bodies bodies(numBodies); 00033 Bodies jbodies; 00034 Cells cells, jcells; 00035 SerialFMM<Laplace> FMM; 00036 FMM.initialize(); 00037 FMM.printNow = true; 00038 00039 FMM.startTimer("Set bodies "); 00040 FMM.random(bodies,1,1); 00041 FMM.stopTimer("Set bodies ",FMM.printNow); 00042 FMM.eraseTimer("Set bodies "); 00043 00044 FMM.startTimer("Set domain "); 00045 FMM.setDomain(bodies); 00046 FMM.stopTimer("Set domain ",FMM.printNow); 00047 FMM.eraseTimer("Set domain "); 00048 00049 #ifdef TOPDOWN 00050 FMM.topdown(bodies,cells); 00051 #else 00052 FMM.bottomup(bodies,cells); 00053 #endif 00054 jcells = cells; 00055 FMM.startTimer("Downward "); 00056 FMM.downward(cells,jcells); 00057 FMM.stopTimer("Downward ",FMM.printNow); 00058 FMM.eraseTimer("Downward "); 00059 00060 if( IMAGES != 0 ) { 00061 FMM.startTimer("Set periodic "); 00062 jbodies = FMM.periodicBodies(bodies); 00063 FMM.stopTimer("Set periodic ",FMM.printNow); 00064 FMM.eraseTimer("Set periodic "); 00065 } else { 00066 jbodies = bodies; 00067 } 00068 00069 FMM.startTimer("Direct sum "); 00070 bodies.resize(numTarget); 00071 FMM.buffer = bodies; 00072 FMM.initTarget(FMM.buffer); 00073 FMM.evalP2P(FMM.buffer,jbodies); 00074 FMM.stopTimer("Direct sum ",FMM.printNow); 00075 FMM.eraseTimer("Direct sum "); 00076 FMM.writeTime(); 00077 FMM.writeTime(); 00078 00079 real diff1 = 0, norm1 = 0, diff2 = 0, norm2 = 0; 00080 FMM.evalError(bodies,FMM.buffer,diff1,norm1,diff2,norm2); 00081 FMM.printError(diff1,norm1,diff2,norm2); 00082 #ifdef VTK 00083 int Ncell = 0; 00084 vtkPlot vtk; 00085 vtk.setDomain(FMM.getR0(),FMM.getX0()); 00086 vtk.setGroupOfPoints(bodies,Ncell); 00087 vtk.plot(Ncell); 00088 #endif 00089 FMM.finalize(); 00090 }