Let’s describe a 3D parametric curve by the form. The value s is in [0, 1]. It is a circle when s is zero, in the other situations it represents a spiral. #include <vtkPointData.h> #include <vtkSmartPointer.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkRenderer.h> #include <vtkPolyData.h> #include <vtkProperty.h> #include <vtkSphereSource.h> #include <vtkPolyDataMapper.h> Read more…
The post shows how to cut image by a plane smoothly. Header And Macros #include <vtkVersion.h> #include <vtkImageData.h> #include <vtkImageMapper3D.h> #include <vtkImageStencil.h> #include <vtkImageStencilData.h> #include <vtkImageToImageStencil.h> #include <vtkJPEGReader.h> #include <vtkPointData.h> #include <vtkSmartPointer.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkInteractorStyleImage.h> #include <vtkRenderer.h> #include <vtkImageActor.h> #include <vtkPolyDataToImageStencil.h> #include <vtkPolyData.h> #include <vtkSTLReader.h> #include <vtkProperty.h> Read more…
Here is dump log which shows the stack information. The class CBase has OpenModule and CloseModule interfaces, they can be called multible times. exe caused an Access Violation at location 00007FFA62174327 in module vtkCommonCore-8.2.dll Reading from location 0000000000000DA4. AddrPC Params 00007FFA62174327 0000000000000001 00007FFA9011F05B 0000013DF642A190 vtkCommonCore-8.2.dll!vtkCollection::DeleteElement 00007FFA62174155 0000000000000001 00007FFA622D3BFF 0000013DF6429290 vtkCommonCore-8.2.dll!vtkCollection::~vtkCollection Read more…
We have a model looks like in the following scene. It has been cut by a plane but the shape changed after that. So its surface become not flat. I got the cut plane information and planed to project all points on the cut part to the plane. The code Read more…
The article describe a simple way to display point id list on the original model. We use VTK to draw and show all scenes. vtkSmartPointer<vtkPolyData> UShowData::ShowListByPoints(vtkSmartPointer<vtkPolyData> polyData, vtkSmartPointer<vtkIdList> list) { vSPNew( result, vtkPolyData ); vSPNew( resultPts, vtkPoints ); vSPNew( resultVerts, vtkCellArray ); for( int i = 0; i < list->GetNumberOfIds(); Read more…
Rotate Vector To Orthogonal Direction Just like in the picture, we will rotate vector to which is orthogonal to the neighbor . The vector is the cross product of and . #include <iostream> #include “point.hpp” int main() { Point m( 1, 0, 0 ); Point n( 1, 0.5, 0 ); Read more…
The article shows how to combine two mesh objects to one based on VTK. The code snippet is in the following part. #include <iostream> #include <vtkSmartPointer.h> #include <vtkSphereSource.h> #include <vtkActor.h> #include <vtkConeSource.h> #include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkPolyDataMapper.h> #include <vtkRenderWindowInteractor.h> #define vtkPtr( var, className ) vtkSmartPointer<className> var = \ vtkSmartPointer<className>::New() Read more…
We will compute the distance to the sphere for every point. Write the distance value to point data as scalars. Set different colors for the different distance ranges.
The angle between two vectors can be calculated by the dot product. We want to find the direction of the rotation. Here are two different ways to get it done. 1、Compute the value of Sine of the angle, then we can judge it’s clockwise or counterclockwise. The value of Sine Read more…