I am trying to make a raycaster game in Javascript, and to do so, I am following this tutorial, which is written in C .

My problem stems from trying to convert the following two lines to javascript:

int tx = (int)(texWidth * (floorX - cellX)) & (texWidth - 1);
color = (color >> 1) & 8355711; // make a bit darker

I don't know what the "&" and ">>" mean in those two lines. Is there an equivalent in Javascript?

CodePudding user response：

>> is the right bit-shift operator and & is the bitwise-and operator, both of them are available in JavaScript

CodePudding user response：

The code directly translates to JS with the removal of the (int) typecast and the replacement of int with let/var/const.

let tx = (texWidth * (floorX - cellX)) & (texWidth - 1);    
color = (color >> 1) & 8355711; // make a bit darker 

& is the bitwise and, >> is the bitshift right, explained well here.