ThreeJS
Interaction Style, BBox, Picked Point On Mesh In Three.js
Here are some basic computing tasks for mesh in three.js. Calculate The Bounding Box Of Mesh, Interaction Style, Get Picked Point.
VTK
VTK – Why Did DeepCopy Fail For vtkTransform?
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…
CGAL
CGAL: Area of Parallelogram And Volume Of Triple Vectors
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.
Algorithm
Find Closest Plane Between Points In 3D By Levmar Algorithm
how to find the closest plane closest to a few random points in the 3D environment. We know that the sum of square distances from point to plane can be calculated.
CGAL
Find Closest Line Between Points In 2D By Least Squares
Let’s create a few random points and use algorithm library CGAL and the visualization toolkit (VTK) to find and draw the closest line by a demo.
VTK
Simple Way To Fill The Hole On 3D Model
I want to fill the clipped model in a simple way.
For every single list, sort the points on the list and connect the last point and the first one if it’s opened. Take the first point on the list and find its two neighboring points, construct a triangle by them.
CGAL
CGAL: Useful Properties Of Matrix
We defined three different matrix A(m x n), B(n x r), and C(n x r), they satisfy distributivity of multiplication over addtion: A(B+C) = AB + AC.
CGAL
Build CGAL Libraries And Use It
Building CGAL libraries (non header-only mode)
Then we can build the project and install libraries.
Create a matrix and do transpose operation.
VTK
VTK : Find The Boundary Of Projected Points
I want to find the boundary of all projected points which are computed from the points on the 3D model. The red arrow in the following image represents the projected vector. I will project the original points on the 3D model to a plane.