恋爱计时器 亲爱的YX，我们已经认识了 Days Hours Minutes Seconds [Read More]

Point and Vector In a game or a 3D graphical application, a point is normally represented by a 4-component column(row) vector. \(p=\begin{pmatrix} a\\b\\c\\1\end {pmatrix}\) [Read More]

Point and Vector In a game or a 3D graphical application, a point is normally represented by a 4-component column(row) vector. \(p=\begin{pmatrix} a\\b\\c\\1\end {pmatrix}\) [Read More]

Matrix Before diving into the homogeneous coordinate, it’s important to understand why matrix is preferred in transformation calculation. Let’s begin the discussion with a simple scenario, If we want to rotate a point p with respect to origin o anti-clock wisely 90° [Read More]

Random In c++, An iterator is any object that, pointing to some element in a range of elements (such as an array or a container), has the ability to iterate through the elements of that range using a set of operators (with at least the increment (++) and dereference (*)... [Read More]