模型纹理,把纹理和模型一起打成.IV包(打在包里面的不光是索引)

对于纹理,SoTexture2有几个属性:
SoSFString  filename
SoSFImage  image
常用的是filename,这样在iv里保存的是文件名称.如果使用image,则把图片内容保存到iv文件里.可以实现要求目标.
//------------------例子---------------------
int _tmain(int argc, _TCHAR* argv[])
{
 //
 Widget myWindow = SoXt::init(argv[0]);
 if (myWindow == NULL)
  exit(1);
 SoSeparator *root = new SoSeparator;
 root->ref();
 unsigned char bytes[32*32];
 int con=0;
 for (int i=0;i<32;i++)
 {
  for (int j=0;j<32;j++)
  {
   bytes[con++]=80+60*sin(0.5*i)+60*cos(0.5*j);
  }
 }
 SoTexture2 *texture=new SoTexture2;
 texture->image.setValue(SbVec2s(32,32),1,bytes);
 root->addChild(texture);
 SoCoordinate3 *coord=new SoCoordinate3;
 coord->point.set1Value(0,0,0,0);
 coord->point.set1Value(1,0,1,0);
 coord->point.set1Value(2,1,1,0);
 coord->point.set1Value(3,1,0,0);
 root->addChild(coord);
 SoFaceSet *face=new SoFaceSet;
 face->numVertices.setValue(4);
 root->addChild(face);
 // Set up viewer:
 SoXtExaminerViewer *myViewer = new SoXtExaminerViewer(myWindow);
 myViewer->setSceneGraph(root);
 myViewer->setTitle("Examiner Viewer");
 myViewer->show();
 
 SoXt::show(myWindow);
 SoXt::mainLoop();
 
 SbString ivFile;
 ivFile="demo.iv";
 SoWriteAction wa;
 wa.getOutput()->setBinary(true);
 wa.getOutput()->openFile(ivFile.getString());
 wa.apply(root);
 wa.getOutput()->closeFile();
 
 root->unref();
 return 0;
}
http://tanghg678.blog.163.com/blog/static/1292320520070882813605/

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