support for various angular units in std.math

[Peter Alexander]

On 28/02/11 1:17 AM, Colin Wallace wrote:
> I've been doing a lot of opengl work in D. Opengl deals primarily
> (maybe even completely?) with degrees.
>
> When using trigonometric functions, they all deal with radians. So
> I've been having to do lots of converting. Converting is very
> straightforward, but I still think it would be nice if there were some
> built in functions for dealing with other units than radians. I think
> a system that looked like what is used for the Duration struct in
> core.time would make things more readable. The code for taking the
> sine of a number measured in degrees could look like:
> sin!"degrees"(45)
> rather than
> sin(45*PI/180)
>
> It doesn't make a huge difference to me, but neither does the dur!()
> function, yet somebody decided it would be helpful and it made its way
> into the standard library. So I figured I would at least share this
> idea to see what other people thought of it.

When you start doing OpenGL properly, degrees don't show up at all. In 
fact, I believe all degrees functions are deprecated in the latest 
version (could be wrong on this).

Really, you should be doing all the matrix calculations and rotations 
yourself. If anything should come out of this, it would be a nice, small 
linear algebra library.