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OSVolumeRender.cxx
161 lines (135 loc) · 4.33 KB
/
OSVolumeRender.cxx
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#include "vtkGraphicsFactory.h"
#include "vtkImagingFactory.h"
#include "vtkImageData.h"
#include "vtkMetaImageReader.h"
#include "vtkCamera.h"
#include "vtkVolume.h"
#include "vtkPiecewiseFunction.h"
#include "vtkColorTransferFunction.h"
#include "vtkVolumeProperty.h"
#include "vtkFixedPointVolumeRayCastMapper.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkWindowToImageFilter.h"
#include "vtkPNGWriter.h"
#define WSIZE 1024
int main( int argc, char * argv[] )
{
char * in_file_name = argv[1];
char * out_file_name = argv[2];
double vux = atof( argv[3] );
double vuy = atof( argv[4] );
double vuz = atof( argv[5] );
double px = atof( argv[6] );
double py = atof( argv[7] );
double pz = atof( argv[8] );
double min;
double max;
if ( argc > 9 )
{
min = atof( argv[9] );
max = atof( argv[10] );
}
// Graphics Factory
vtkGraphicsFactory * graphics_factory
= vtkGraphicsFactory::New();
graphics_factory->SetOffScreenOnlyMode( 1);
graphics_factory->SetUseMesaClasses( 1 );
// Imaging Factory
vtkImagingFactory * imaging_factory
= vtkImagingFactory::New();
imaging_factory->SetUseMesaClasses( 1 );
// Image Reader
vtkMetaImageReader * reader
= vtkMetaImageReader::New();
reader->SetFileName( in_file_name );
// Get center
reader->Update();
vtkImageData * image = reader->GetOutput();
double * range = image->GetScalarRange();
if ( argc > 9 )
{
range[0] = min;
range[1] = max;
}
double * image_spacing = image->GetSpacing();
double * image_origin = image->GetOrigin();
int * whole_extent = image->GetWholeExtent();
int image_dim[3];
image_dim[0] = whole_extent[1] + 1;
image_dim[1] = whole_extent[3] + 1;
image_dim[2] = whole_extent[5] + 1;
double fpx = image_origin[0]
+ image_dim[0] / 2 * image_spacing[0];
double fpy = image_origin[1]
+ image_dim[1] / 2 * image_spacing[1];
double fpz = image_origin[2]
+ image_dim[2] / 2 * image_spacing[2];
// Pixel Diagonal
double pix_diag = sqrt(
image_spacing[0] * image_spacing[0] +
image_spacing[1] * image_spacing[1] +
image_spacing[2] * image_spacing[2] );
// Opacity
vtkPiecewiseFunction * opacity
= vtkPiecewiseFunction::New();
opacity->AddPoint( range[0], 0.0 );
opacity->AddPoint( range[1], 1.0 );
// Color
vtkColorTransferFunction * color
= vtkColorTransferFunction::New();
color->AddRGBPoint( range[0], 0.0, 0.0, 0.0 );
color->AddRGBPoint( range[0] + 1.0 * ( range[1] - range[0] ) / 3.0, 1.0, 0.0, 0.0 );
color->AddRGBPoint( range[0] + 2.0 * ( range[1] - range[0] ) / 3.0, 1.0, 1.0, 0.0 );
color->AddRGBPoint( range[1], 1.0, 1.0, 1.0 );
// Volume Property
vtkVolumeProperty * vol_prop = vtkVolumeProperty::New();
vol_prop->SetColor( color );
vol_prop->SetScalarOpacity( opacity );
//vol_prop->ShadeOff();
//vol_prop->SetInterpolationTypeToLinear();
// Mapper
vtkFixedPointVolumeRayCastMapper * mapper
= vtkFixedPointVolumeRayCastMapper::New();
mapper->SetImageSampleDistance( 0.25 );
mapper->SetSampleDistance( pix_diag / 5.0 );
mapper->SetInputConnection( reader->GetOutputPort() );
// Volume
vtkVolume * volume = vtkVolume::New();
volume->SetMapper( mapper );
volume->SetProperty( vol_prop );
// Camera
vtkCamera * camera = vtkCamera::New();
camera->SetViewUp (vux, vuy, vuz);
camera->SetPosition (
fpx + px,
fpy + py,
fpz + pz );
camera->SetFocalPoint (fpx, fpy, fpz);
camera->ComputeViewPlaneNormal();
// Renderer
vtkRenderer * renderer = vtkRenderer::New();
renderer->SetBackground( 0.4, 0.4, 0.4 );
renderer->AddVolume( volume );
renderer->SetActiveCamera(camera);
renderer->ResetCamera();
//camera->Zoom(3.0);
// Render Window
vtkRenderWindow * render_window = vtkRenderWindow::New();
render_window->SetSize( WSIZE, WSIZE );
render_window->SetOffScreenRendering( 1 );
render_window->AddRenderer( renderer );
// ***** STEREO *****
//render_window->StereoRenderOn();
// Window to Image
vtkWindowToImageFilter * win_2_image
= vtkWindowToImageFilter::New();
win_2_image->SetInput( render_window );
// PNG Writer
vtkPNGWriter * writer = vtkPNGWriter::New();
writer->SetFileName( out_file_name );
writer->SetInputConnection( win_2_image->GetOutputPort() );
render_window->Render();
writer->Write();
return 0;
}