On Tuesday, 19 February 2019 at 16:44:23 UTC, drug wrote:
On 19.02.2019 19:35, Alex wrote:
On Tuesday, 19 February 2019 at 16:26:33 UTC, drug wrote:
Well, I understand that using floating point values to
represent time internally is a bad idea and I totally agree.
But some convenient API to convert Duration to floating point
and vice versa would be useful because in mechanics for
example you often need to express time in seconds with
fractional part. In this regard std::chrono is more
expressive (the only one though, in general std.datetime is
much more powerful than std::chrono).
If you need a real (double, float) parameter, just use it.
Transport the units separately...
Could you elaborate what you mean?
```
auto point = vec3(1.0, 2.0, 3.0);
vec3 velocity = ...;
auto t = dur!"msecs"(500);
...
auto new_point = point + velocity * t.total!"msecs"/1e3;
```
How can I use a real parameter and transport units separately
here?
like
´´´
import std.datetime;
void main()
{
import std.stdio;
auto d = Data!"msecs"();
writeln(d.point);
writeln(d.t);
}
struct Data(string units)
{
real[3] point = [1.0, 2.0, 3.0];
real[3] velocity = ...;
auto t = dur!units(500);
}
´´´
