bitbegin

顶星星随机！至于炮弹，现在的做法还好

Can't reproduce `case 1` and `case 2`. If after `case 2`, close the window, the console will crash after seconds: ``` *** Runtime Error 1: access violation *** in file:...

https://en.wikipedia.org/wiki/Rounding do we need to add rounding-mode for `divide` for `remainder`?

`%` for remainder (related to rounding mode), `%%` for modulo (which method to use?) `/` for division (related to rounding mode) well, i just considered integer! cases

> The numerical comparison operators = always return false if either or both operands are NaN. As NaN is very special, i don't know how to fix this. Maybe you...

https://github.com/red/red/pull/4644

`to issue! "a b c 1 2 3"` should raise an error!?

how do i know it has installed OpenGL? this crate only support OpenGL backend?

@daboross i will test it tomorrow

removing the with_multisampling code or changing sample rate to 4 both not work. My display driver is citrix. The OpenGL version is 1.1.0 (1.20 for ext).