Adam Han's Blog

“Is this point to the left or to the right of my path?” Or a more intuitive situation: Is the address point to the left or right of the street? This post explores how to solve this using the 3D cross

IntroductionAssume that all coordinates are expressed in a suitable projected Cartesian coordinate system, so Euclidean lengths and planar areas are meaningful. Land subdivision sometimes involves mov

Question: Offset one edge of a quadrilateral (giving a new edge ) to form a new (usually smaller) quadrilateral (parcel) whose area equals a predefined value . Find the offset distance . Short answ

The Openwrt VM running in my fanless pc is the main router of home network. Recently I got a new router which has 6 NICs and a more powerful CPU. So I need to migrate the Openwrt VM to the new machine

1. IntroductionIn offshore petroleum exploration practice, the coordinates of blocks designed by geologists for a particular purpose must be provided in Degree-Minute-Second format: the degree uses 2

I tried to use Linux back in 2004, and started to use it as a daily operating system in 2016. Maybe because I wasn’t (though I tried to be one) an IT worker, I never met a person using Linux in person

OpenWrt is an open source linux system tailored for routers. Using an offical OpenWrt VM system as router has obvious benefits: enjoy the most flexibility of OpenWrt and get rid of the outdated vendor

I have used my network scanner through Windows for a long time. It works well except I need to get a Windows laptop. Although the default storage path of the scanner resides in a samba server, it is s