Machine Learning • Deep Learning • Programming
Qt5 support standard dialogs such as QFileDialog, QFontDialog, and QColorDialog, however, it does not provide a color picker to allow a user to pick a color. Recently, I need a color picker for one of my projects and I implemented a simple color picker widget. SColorPicker is available from Github as a part of QtUtils …
Recently, I had to give away a computer with couple of disks in it. I wanted to securely erase data on these disks as I stored personal sensitive information on them. Using a program such as DBAN was not an option as I was not allowed to remove the operating system from the computer. My …
This week, at work I had to implement a search box for a software I am working on. The search box is to filter some data dynamically as user types a query. I wanted to show a clear (cross) icon at the right side of the search box so that user can clear the results instead …
Few weeks ago, I published SLogLib (a cross-platform logging library) on GitHub. I wrote the user manual in a readme.md file as is the standard practice at GitHub. However, since most of users don’t have markdown viewers installed on their machines they would either need to access GitHub repository or would have to convert it …
Often there is a need to estimate the time it takes for a piece of code to run. This is useful not only for debugging but also for reporting the execution time of lengthy tasks to the user. On Windows, QueryPerformanceFrequency() and QueryPerformanceCounter() can be used to determine the execution time of a code. QueryPerformanceFrequency() …
A long time ago when I was doing PhD I was implementing a very complex geometric algorithm for computing intersection of two triangular meshes. There were bugs in code which would trigger only in certain edge cases. Since it was a GUI program using std::cout was not an option. Initially I tried writing messages to …
In this post I will show how to compute area of a facet in CGAL::Polyhedron_3. ComputeFacetArea() Functor ComputeFacetArea() is a thread-safe functor for computing the area of a given facet in a CGAL::Polyhedron_3. The facet must be a planar polygon with arbitrary number of sides. We need facet’s normal vector to compute it’s area. The …
In this post I will show how to compute normal vector at a vector in CGAL::Polyhedron_3. ComputeVertexNormal() Functor ComputeVertexNormal() is a thread-safe functor for computing the normal vector at a given vertex in a CGAL::Polyhedron_3. The normal vector at a vertex is the average of the normal vectors of all facets incident on the vertex. …
In this post I will show how to compute normal vector of a facet in CGAL::Polyhedron_3. ComputeFacetNormal() Functor ComputeFacetNormal() is a thread-safe functor for computing the normal vector of a given facet in a CGAL::Polyhedron_3. The facet must be a planar polygon with arbitrary number of sides. Using ComputeFacetNormal() Functor Normal vector of a facet …
In this post I will show how to compute edge length for a half-edge in CGAL::Polyhedron_3. ComputeEdgeLength() Functor ComputeEdgeLength() is a thread-safe functor for computing the edge length of a given half-edge in a CGAL::Polyhedron_3. Using ComputeEdgeLength() Functor Edge length of a half-edge h can be computed as double length = ComputeEdgeLength(h);. For most purposes, …