From: ruby-core@...
Date: 2014-10-29T00:51:07+00:00
Subject: [ruby-core:65963] [ruby-trunk - Feature #10442] Helper methods to	Vector class

Issue #10442 has been updated by Marc-Andre Lafortune.


Thanks for the feature request(s).

I think `angle_between` could be useful. The patch needs work though:

* should check that given argument is a Vector
* should calling `self` when not necessary
* should avoid create intermediary vectors when not necessary for performance reasons
* the doc should specify the return to be in [0...Math::PI]
* I feel that `angle_with` would be a more appropriate name

I am less confident about the `projection_to`. It's really the norm of the projection, so maybe a name like `projected_norm` would be clearer, but I'm curious if this would be used much. Are there applications that use this? If so, please open a separate feature request with details on what kind of applications would use this.

I'll give you a couple of days if you'd like to fix the patch for `angle_with`, otherwise I'll fix it myself and commit it, up to you :-)

Thanks


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Feature #10442: Helper methods to Vector class
https://bugs.ruby-lang.org/issues/10442#change-49697

* Author: Egunov Dmitriy
* Status: Open
* Priority: Normal
* Assignee: Marc-Andre Lafortune
* Category: lib
* Target version: 
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Vector class missed some very helpful methods like angle between another vector and vector projection.

Patch attached. Please advice if more unit tests are needed.

---Files--------------------------------
vector_helpers.patch (1.44 KB)


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