if(!image)image=getImageData();
int* n = image->GetExtent();
//int nPos= (n[5]-n[4])/2;
if(!resliceSagittal)resliceSagittal=vtkImageReslice::New();
resliceSagittal->SetInput(image);
resliceSagittal->GetInput()->SetUpdateExtentToWholeExtent();
resliceSagittal->SetResliceAxesOrigin(0,0,0);
resliceSagittal->SetOutputDimensionality(2);
resliceSagittal->SetOutputSpacing(DataSpacing[0],DataSpacing[1],DataSpacing[2]);
resliceSagittal->InterpolateOn();
resliceSagittal->SetResliceAxesDirectionCosines(1,0,0,
0,1,0,
0,0,1);
resliceSagittal->Update();
resliceSagittal->SetBackgroundLevel(Form1->wcenter+30);
vtkImageMapToWindowLevelColors *sagColors=vtkImageMapToWindowLevelColors::New();
sagColors->SetInput(resliceSagittal->GetOutput());
sagColors->SetWindow(Form1->wwidth);
sagColors->SetLevel(Form1->wcenter);
Form1->wwidth=sagColors->GetWindow();
Form1->wcenter=sagColors->GetLevel();
_planeActorXY2=vtkImageActor::New();
_planeActorXY2->SetInput(sagColors->GetOutput());
_xRenderer->AddProp(_planeActorXY2);
sagColors->Delete();
Hi Sebastien,
The SetResliceAxesDirectionCosines() takes 3 vectors to make the
class more general, i.e. to allow a person to specify the x,y,z
axes of an output volume. For a single slice, take the cross
product of the x and y vectors to get a z vector. Then, use
SetResliceAxesOrigin() to specify a point that lies on the slice
plane.
- David
最后一个参数用于指定在面上面的一个点
数据分析，可以得到，vtkimagereslice返回的2个点为相对的顶点坐标，是实际在空间中的位置坐标，origin返回的是实际的平面的中心坐标。
app->p3DSurfaceView4->pSection->GetPoint1(xyz1);
app->p3DSurfaceView4->pSection->GetPoint2(xyz2);
app->p3DSurfaceView4->pSection->GetNormal(normal);
app->p3DSurfaceView4->pSection->GetOrigin(origin);
TRACE("xyz1:%f\t%f\t%f\n",xyz1[0],xyz1[1],xyz1[2]);
TRACE("xyz2:%f\t%f\t%f\n",xyz2[0],xyz2[1],xyz2[2]);
TRACE("normal:%f\t%f\t%f\n",normal[0],normal[1],normal[2]);
TRACE("origin:%f\t%f\t%f\n\n",origin[0],origin[1],origin[2]);
xyz1:249.755737 -0.244141 80.844879
xyz2:-0.244141 249.755737 80.844879
normal:0.000000 0.000000 1.000000
origin:-0.244141 -0.244141 80.844879
xyz1:249.755737 -0.244141 85.007439
xyz2:-0.244141 249.755737 85.007439
normal:0.000000 0.000000 1.000000
origin:-0.244141 -0.244141 85.007439
xyz1:249.755737 -0.244141 85.701200
xyz2:-0.244141 249.755737 85.701200
normal:0.000000 0.000000 1.000000
origin:-0.244141 -0.244141 85.701200
xyz1:249.755737 -0.244141 86.394960
xyz2:-0.244141 249.755737 86.394960
normal:0.000000 0.000000 1.000000
origin:-0.244141 -0.244141 86.394960
xyz1:249.755737 -0.244141 87.088720
xyz2:-0.244141 249.755737 87.088720
normal:0.000000 0.000000 1.000000
origin:-0.244141 -0.244141 87.088720
xyz1:249.755737 -0.244141 88.476240
xyz2:-0.244141 249.755737 88.476240
normal:0.000000 0.000000 1.000000
origin:-0.244141 -0.244141 88.476240
xyz1:249.755737 -0.244141 89.170000
xyz2:-0.244141 249.755737 89.170000
normal:0.000000 0.000000 1.000000
origin:-0.244141 -0.244141 89.170000
xyz1:249.755737 -0.244141 91.251280
xyz2:-0.244141 249.755737 91.251280
normal:0.000000 0.000000 1.000000
origin:-0.244141 -0.244141 91.251280
xyz1:249.755737 -0.244141 91.945040
xyz2:-0.244141 249.755737 91.945040
normal:0.000000 0.000000 1.000000
origin:-0.244141 -0.244141 91.945040
xyz1:249.755737 -0.244141 92.638800
xyz2:-0.244141 249.755737 92.638800
normal:0.000000 0.000000 1.000000
origin:-0.244141 -0.244141 92.638800
xyz1:249.755737 -0.244141 94.720080
xyz2:-0.244141 249.755737 94.720080
normal:0.000000 0.000000 1.000000
origin:-0.244141 -0.244141 94.720080
xyz1:249.755737 -0.244141 95.413841
xyz2:-0.244141 249.755737 95.413841
normal:0.000000 0.000000 1.000000
origin:-0.244141 -0.244141 95.413841
xyz1:249.755737 -0.244141 101.657681
xyz2:-0.244141 249.755737 101.657681
normal:0.000000 0.000000 1.000000
origin:-0.244141 -0.244141 101.657681
xyz1:249.755737 -0.244141 112.757842
xyz2:-0.244141 249.755737 112.757842
normal:0.000000 0.000000 1.000000
origin:-0.244141 -0.244141 112.757842
xyz1:249.755737 -0.244141 119.695443
xyz2:-0.244141 249.755737 119.695443
normal:0.000000 0.000000 1.000000
origin:-0.244141 -0.244141 119.695443
xyz1:249.755737 -0.244141 126.633044
xyz2:-0.244141 249.755737 126.633044
normal:0.000000 0.000000 1.000000
origin:-0.244141 -0.244141 126.633044
xyz1:249.755737 -0.244141 128.020564
xyz2:-0.244141 249.755737 128.020564
normal:0.000000 0.000000 1.000000
origin:-0.244141 -0.244141 128.020564