CSGOptiX/tests/CSGOptiXSimtraceTest.cc

0001 /**
0002 CSGOptiXSimtraceTest : used from cxs.sh
0003 ===========================================
0004
0005 Using as much as possible the CSGOptiX rendering machinery
0006 to do simulation. Using CSGOptiX raygen mode 1 which flips the case statement
0007 in the __raygen__rg program.
0008
0009 The idea is to minimize code divergence between ray trace rendering and
0010 ray trace enabled simulation. Because after all the point of the rendering
0011 is to be able to see the exact same geometry that the simulation is using.
0012
0013 ::
0014
0015      MOI=Hama CEGS=5:0:5:1000   CSGOptiXSimtraceTest
0016      MOI=Hama CEGS=10:0:10:1000 CSGOptiXSimtraceTest
0017
0018 TODO:
0019     find way to get sdf distances for all intersects GPU side
0020     using GPU side buffer of positions
0021
0022     just need to run the distance function for all points and with
0023     the appropriate CSGNode root and num_node
0024
0025     does not need OptiX, just CUDA (or it can be done CPU side also)
0026
0027 **/
0028
0029 #include <cuda_runtime.h>
0030
0031 #include "scuda.h"
0032 #include "sqat4.h"
0033
0034 #ifdef WITH_OLD_FRAME
0035 #include "sframe.h"
0036 #else
0037 #include "sfr.h"
0038 #include "stree.h"
0039 #endif
0040
0041
0042 #include "SSim.hh"
0043 #include "SOpticks.hh"
0044 #include "SEvt.hh"
0045 #include "SFrameGenstep.hh"
0046 #include "SEventConfig.hh"
0047
0048 #include "OPTICKS_LOG.hh"
0049 #include "CSGFoundry.h"
0050 #include "CSGOptiX.h"
0051 #include "QSim.hh"
0052
0053 int main(int argc, char** argv)
0054 {
0055     OPTICKS_LOG(argc, argv);
0056     SEventConfig::SetRGModeSimtrace();
0057
0058     const char* comp = "genstep,simtrace" ;
0059     SEventConfig::SetGatherComp(comp);
0060     SEventConfig::SetSaveComp(comp);
0061     // TODO: this config is automated now,  check that and remove
0062
0063     SOpticks::WriteOutputDirScript() ; // writes CSGOptiXSimtraceTest_OUTPUT_DIR.sh in PWD
0064
0065     SEvt* evt = SEvt::Create(SEvt::EGPU) ;
0066
0067     CSGFoundry* fd = CSGFoundry::Load();
0068     stree* tree = fd->getTree();
0069
0070 #ifdef WITH_OLD_FRAME
0071     sframe fr = fd->getFrame() ;  // depends on MOI, fr.ce fr.m2w fr.w2m set by CSGTarget::getFrame
0072     std::cout << "[ main fr" << std::endl << fr << std::endl << "] main fr" << std::endl  ;
0073     evt->setFrame(fr);   // formerly this added CE gensteps, now need to SEvt::BeginOfEvent ?
0074 #else
0075     sfr fr = tree->get_frame_moi();
0076     evt->setFr(fr);
0077 #endif
0078
0079
0080     CSGOptiX* cx = CSGOptiX::Create(fd);
0081
0082     //sfr lfr = fr.spawn_lite();
0083     //cx->setFrame(lfr);
0084
0085
0086     // This seems funny as cx has fd which is the source of the fr : so could be automatic ?
0087     // Not so easy as which frame to use depends on running mode and user input
0088     // so best to not hide it.
0089
0090     cx->simtrace(0);
0091
0092     cudaDeviceSynchronize();
0093
0094     evt->save(); // uses SGeo::LastUploadCFBase_OutDir to place outputs into CFBase/ExecutableName folder sibling to CSGFoundry
0095
0096
0097     return 0 ;
0098 }