Open Inventor显示区域设置SoReoriganizeAction

The code below is an example of a program that applies an SoReorganizeAction on a scene graph, converting all shapes into shapes that can be rendered using vertex array or VBO rendering.

  #include <Inventor/SoDB.h>  #include <Inventor/nodes/SoSeparator.h>  #include <Inventor/nodes/SoCoordinate3.h>  #include <Inventor/nodes/SoCoordinate4.h>  #include <Inventor/nodes/SoNormal.h>  #include <Inventor/nodes/SoTextureCoordinate2.h>  #include <Inventor/nodes/SoSeparator.h>  #include <Inventor/actions/SoWriteAction.h>  #include <Inventor/actions/SoSearchAction.h>  #include <Inventor/errors/SoDebugError.h>  #include <Inventor/nodes/SoShapeHints.h>  #include <Inventor/SoInput.h>  #include <Inventor/SoOutput.h>  #include <Inventor/SoInteraction.h>  #include <Inventor/actions/SoReorganizeAction.h>  #include <cassert>  #include <cstdio>  static void strip_node(SoType type, SoNode * root)  {    SoSearchAction sa;    sa.setType(type);    sa.setSearchingAll(TRUE);    sa.setInterest(SoSearchAction::ALL);    sa.apply(root);    SoPathList & pl = sa.getPaths();    for (int i = 0; i < pl.getLength(); i++) 

    {      SoFullPath * p = (SoFullPath*) pl[i];      if (p->getTail()->isOfType(type))

      {      SoGroup *g = (SoGroup*)p->getNodeFromTail(1);      g->removeChild(p->getIndexFromTail(0));      }      }      sa.reset();  }  int main(int argc, char ** argv )  {    if (argc < 3) {      fprintf(stderr,"Usage: reorganize <infile> <outfile> [nostrip]/n");      return -1;    }    SbBool strip = TRUE;    if (argc > 3) {      if (strcmp(argv[3], "nostrip") == 0) strip = FALSE;      else {        fprintf(stderr,"Usage: reorganize <infile> <outfile> [nostrip]/n");        return -1;      }    }    SoDB::init();    SoInteraction::init();    SoInput input;    SbBool ok = input.openFile(argv[1]);    if (!ok) {      fprintf(stderr,"Unable to open file./n");      return -1;    }    SoSeparator * root = SoDB::readAll(&input);    SbBool vrml1 = input.isFileVRML1();    SbBool vrml2 = input.isFileVRML2();    if (vrml2) {      fprintf(stderr,"VRML2 not supported yet/n");      return -1;    }    if (!root) {      fprintf(stderr,"Unable to read file./n");      return -1;    }    root->ref();    fprintf(stderr,"Applying SoReorganizeAction...");    SoReorganizeAction reorg;    reorg.apply(root);    fprintf(stderr,"done/n");    SoOutput out;    if (out.openFile(argv[2])) {      if (strip) { // strip coord3, texcoord and normal nodes        fprintf(stderr,"stripping old nodes from scene graph/n");        strip_node(SoCoordinate3::getClassTypeId(), root);        strip_node(SoCoordinate4::getClassTypeId(), root);        strip_node(SoNormal::getClassTypeId(), root);        strip_node(SoTextureCoordinate2::getClassTypeId(), root);      }      fprintf(stderr,"writing target/n");      SoWriteAction wa(&out);      wa.apply(root);    }    root->unref();    return 0;  } // main()