opstatic is an improved keyword for static in C++.
Differences With C++
The behavior of static in C++ is a well known headache in the language. To define a static variable, you cannot set its default value in the header file - you have to set it in the source as well as defining it in the header.
With opstatic, you can set a static variable's value in any opC++ header file at the declaration location.
opstatic float start_health = 1.5;