lib/draw should accept FP coordinates/values

[maximecb]

I ran into an issue while using lib/draw, particularly the drawPoint function. I was supplying integer coordinates, but the values were internally stored as the f64 type (output of Math.floor). The calls to drawPoint simply didn't draw anything on the screen.

I remembered a previous discussion we had and use a trick to force an integer conversion. However, I think this issue needs to be fixed. Newbies will surely find it very confusing.

[bFraley]

ES6 has Math.fround, but on every call to drawPoint rounding and conversion may get expensive.
Maybe parseInt on xy if it contains "." ? May be the least complicated fix ?

Not sure the efficiency of parseInt, or match on every call either.

Oh, and I'm referring to only the drawPoint function

[maximecb]

Both of these are unfortunately pretty slow. I particularly care about the performance of drawPoint, so I would have that one directly use $ir_is_int32(x) before making a call. The other functions could use $rt_toInt32(x).

[bFraley]

Hmm..im thinking those IR functions may beat other FP to int conversion methods, like Mozillas fround..possibly

[maximecb]

They're more direct ways of telling Higgs what you want to do. The parseInt function is not optimized for performance, and there's some dynamic lookup overhead.