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 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 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.
I found a strange result about transform computation in my project. I create a new transform B by A, then use A to deep copy B and print it. There is a different matrix if I use shallow copy for Read more…
We can get the third vector by cross product of two vectors, the new vector is perpendicular to the first vectors. We also know the geometry meaning of the determinant, it’s sign volumn value for three vectors.