c++ - Apply transformation to PolyData -

i want able apply tranformations polydata no matter how try it, doesn't work.

here have "drawing" polydata in class call drawing.cpp:

drawing.h

vtksmartpointer<vtkplane> clipplane;  vtksmartpointer<vtkimplicitplanerepresentation> planerep;  vtksmartpointer<vtkactor> actorplanesource;  vtksmartpointer<vtkactor> mainactor;   vtksmartpointer<vtktransformpolydatafilter> transformfilter;  vtksmartpointer<vtktransform> translation ;  vtkcontextview* ctxview ;  vtkrenderwindow* win ;  vtkrenderer* ren ;  vtkcamera* cam ;  vtksmartpointer<vtkpolydata> inputpolydata; 

then read function called , starts rendering, here function in drawing.cpp:

void drawing::read(){           std::string filename = bunny;          // read data file          vtksmartpointer<vtkxmlpolydatareader> reader =vtksmartpointer<vtkxmlpolydatareader>::new();          reader->setfilename(filename.c_str());          reader->update();          inputpolydata = reader->getoutput();           cout << "file found , loaded : " << filename << endl ;           vtksmartpointer<vtktransform> translation = vtksmartpointer<vtktransform>::new();          translation->translate(0.3, -0.05, 0);          transformfilter = vtksmartpointer<vtktransformpolydatafilter>::new();          //transformfilter->setinputconnection(reader->getoutputport());          transformfilter->setinputdata(inputpolydata);          transformfilter->settransform(translation);          //transformfilter->update();           vtksmartpointer<vtkpolydatamapper> mapper = vtksmartpointer<vtkpolydatamapper>::new();          mapper->setinputconnection(transformfilter->getoutputport());           mainactor = vtksmartpointer<vtkactor>::new();          mainactor->setmapper(mapper);           ren->addactor(mainactor);           vtkrenderwindowinteractor *iren = vtkrenderwindowinteractor::new();          iren->setrenderwindow(win);          vtkinteractorstylemultitouchcamera *style =          vtkinteractorstylemultitouchcamera::new();          iren->setinteractorstyle(style);           //start event loop          iren->initialize();          iren->start();           defineclipping();          win->polygonsmoothingon();          win->render();          win->start();  }  

from this, have other thread running server gets messages , has pointer drawing object , supposed call 1 of these 3 functions depending on message gets clients:

void drawing::scale(float k){          vtksmartpointer<vtktransform> transform =vtksmartpointer<vtktransform>::new();          transform->scale(5,1,1);          vtksmartpointer<vtktransformfilter> transformfilter = vtksmartpointer<vtktransformfilter>::new();          transformfilter->setinputconnection(cone->getoutputport());          transformfilter->settransform(transform);          mapper->setinputconnection(transformfilter->getoutputport());          ren->getactivecamera();  }   void drawing::translate(float x, float y, float z){          cout << "translate: " << x << " - " << " - " << y << " - " << z << endl ;          vtksmartpointer<vtktransform> transform1a = vtksmartpointer<vtktransform>::new();          //transform1a->translate(x,y,z);          //transformfilter->settransform(transform1a);          //transformfilter->update();          double* position = mainactor->getposition();          mainactor->setposition(position[0]+x,position[1]+y,position[2]+z);  }   void drawing::rotate(float x, float y, float z){          cout << "rotate: " << x << " - " << " - " << y << " - " << z << endl ;          vtksmartpointer<vtktransform> transform1a = vtksmartpointer<vtktransform>::new();          //transform1a->postmultiply();          //transform1a->rotatex(x);          //transform1a->rotatey(y);          //transform1a->rotatez(z);          //mainactor->setusertransform(transform1a);          mainactor->rotatewxyz(20,1,0,0);   } 

none of these functions work because nothing changing in rendering windows unless click in rendering window itself. thought maybe should try , add every transformation functions: ctxview->render(); when get:

error ressource busy.

i'm newbie in vtk find weird can't simple transformation object. that.

edit: ok after hours of trying different things have notices if comment out line iren->start(); rotations , translations called. however, program closes there done , cannot interact window anymore. have insights on that?

thanks in advance.

yes, try give little code made rotations polydata, guess different pipeline (i using vtkimagereslice object m_preslice):

int nextent[3]; double dspacing[3]; double dorigin[3];  m_preader->getoutput()->getspacing(dspacing); m_preader->getoutput()->getorigin(dorigin); m_preader->getoutput()->getdimensions(nextent);  double dcenter[3]; dcenter[0] = dorigin[0] + dspacing[0] * 0.5 * nextent[0];   // nextent[0] width dcenter[1] = dorigin[1] + dspacing[1] * 0.5 * nextent[1];   // nextent[1] height dcenter[2] = dorigin[2] + dspacing[2] * 0.5 * nextent[2];   // nextent[2] depth  vtksmartpointer<vtktransform> ptransform = vtksmartpointer<vtktransform>::new(); ptransform->premultiply();  int ndirection = cdirectiondlg::getdirection(); if(cdirectiondlg::dir_axial == ndirection) {     ptransform->translate(dcenter[0], 0, dcenter[2]);     ptransform->rotatey(180);     ptransform->translate(-dcenter[0], 0, -dcenter[2]); } else {     ptransform->translate(dcenter[0], dcenter[1], 0);     ptransform->rotatez(180);     ptransform->translate(-dcenter[0], -dcenter[1], 0); }  m_preslice->setreslicetransform(ptransform); m_preslice->setinterpolationmodetolinear(); m_preslice->update(); 

consider way rotate object in view moving camera ... hope you.