Proposal: Vector and Point operations macro

[codecat]

So apparently, we can do something like this:

#define CGV(x, y) CGVectorMake(x, y)
#define CGP(x, y) CGPointMake(x, y)
#define CGVop(a, op, b) CGV(a.dx op b.dx, a.dy op b.dy)
#define CGPop(a, op, b) CGP(a.x op b.x, a.y op b.y)

CGVop stands for "CGVector operation". Then, we can do something like this:

CGVector a = CGV(10, 10);
CGVector b = CGV(2, 2);
CGVector c = CGVop(a, *, b); // {20, 20}

The downsides are that you'd need a different macro in order to do something like CGVop(a, *, 2.0f), and it looks kinda ugly. But it's short. I like short. Too bad ObjC doesn't have any kind of operator overloading.

It also raises problems when you do something like this CGVop(CGV(10, 10), +, CGVop(20, 20)), which will execute the left hand and right hand side, twice.

Additionally, I've also created some shorthands for CGVectorFromPoint and CGPointFromVector:

#define P2V(p) CGVectorFromPoint(p)
#define V2P(v) CGPointFromVector(v)

Thoughts?

[codecat]

The other choice is offer an alternative Objective C++ implementation ^^

[samgreen]

Hey Angelo thanks for all the feedback! I'll think it over today and get back to you. I have a couple of ideas in this vein and I'd like to get them implemented. Additionally I'm considering creating a podspec to release this library as a CocoaPod. Do you use pods at all?

[codecat]

I haven't yet. Should really give it a try someday.