We have to find all edges and judge whether the point is in the circumscribed sphere of another three points, the target edge is used by two cells, it has only one neighbor cell in the other words. Finally, flip the cells as the above image.
But the result of the cutting is not particularly idealistic.
So we have to increase density necessarily.
The left one is the low density model, the right attachment model has higher density in the following image.
The post shows how to display the normals of cells on the 3D model by ParaView.
The general steps are in the demo video.
1. Clip model for better watching
2. Add normals filter
3. Show wireframe for better watching
Here is a video to show how to change the density of model by MeshMixer, then compare the new model and old model in ParaView. The general steps are in the following part.
The affine transform in the 3D world can be represented by a 4×4 matrix. If there is no scale in the affine transform, the vector is translate vector and A is the rotate matrix. The original point’s position is representing by M, the changed point’s position is M’. Read more…
Cross Product Let’s define vector and and their cross product . As known that , so we have: The cross product is antisymmetric due to its definition. Dot Product So we can write the dot product of two vectors as the matrix form. Read more…
Calculate Rotate Angle And Asix Between Two Vectors, Calculate Model’s Size In Local Coordinate System, Boolean Operation For Mesh, Found Intersection Circle Of Two Models.
the action scale works in the three directions axis X, axis Y and asix Z. So the scaling transform I want to create needs to rotate by 45 degrees around asix Z, then apply scale(2, 1, 1). But the new transform will rotate cube surely. How to scale the cube without rotating or translating it?
Here are some basic computing tasks for mesh in three.js. Calculate The Bounding Box Of Mesh, Interaction Style, Get Picked Point.