Environment:VTK Branch_v9.1.0emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 3.1.39 I tested two interfaces for pick operation of vtkPropPicker on web page. The result value is awalys 0. Invoking code: There are warning on browser log: Maybe that’s a bug of VTK For WebAssembly. All source code has been Read more…
Sometimes we need to change canvas for VTK WASM 3D window.Updating renderer window and renderer is neccessary if we don’t restart all data loading.The related post is Change Canvas For VTK WASM Project. I got the following error info on the web page if do vtkSDL2OpenGLRenderWindow::Render before m_RenderWindow = newWin; (update the old rendererWindow variable). Read more…
The interface vtkAbstractPicker::AddPickList is used to add an object to the bottom of the list. But it will not check adding the same object to the list. So the number of items in the pick list will increase if we add the item multiple times. Source code for the interface:
Create a sphere and use a plane to cut it to generate a big hole. This is our test data. Then we will fill the hole by inserting a center point of the boundary and creating new triangle cells to form a new surface. We will use ConnectedEdgeFilter.hpp to handles Read more…
The post demonstrates the process of configuring the 3D window after switching from the original canvas to another. After clicking on the update button at the bottom-left position on the webpage, we will call Worker::ChangeRenderWindow to handle the scene. index.html: The interface in worker.cpp: The whole project had been uploaded Read more…
Here is a simple example about how to use VTK to listen for window resize event on web page. As we knew, we can build the VTK CPlusPlus project to wasm to run on browser. If we want to do something when browser change window size, we have to add Read more…
Sometimes you can’t pick object accurately by vtkCellPicker even through you had set tolerance very small, then you can use vtkPropPicker if not care about the details of picked position. vtkPropPicker uses hardware picking to determine the instance of vtk- Prop that was picked, as well as the pick position Read more…
Rotate a cube and move it. Replay the event by shortcut key in the following simple example. We will start by decomposing the matrix into a rotation matrix and a translation matrix, then perform linear interpolation, and finally calculate a new matrix based on the number of steps. main.cpp CustomIteractorStyle.h Read more…
Uniform Cubic Spline To Smooth Segments Change input points and use the Cubic piecewise function introduced in Basic functions for B-Spline to create smooth curve. The left renderer shows polygon lines through original points, and the right one is the smooth curve generated by algorithm. Cardinal Spline To Smooth Segments Read more…