Comments on: Math for game programmers 02 – Vectors 101

By: Ahsan

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By: MatemÃ¡tica para programadores de Jogos: Vetores |

MatemÃ¡tica para programadores de Jogos: Vetores | — Mon, 08 Feb 2016 11:19:28 +0000

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By: Richard

Richard — Sun, 30 Aug 2015 11:30:28 +0000

To the physics major: read the code. imass is 1/mass.

By: Richard

Richard — Sun, 30 Aug 2015 11:28:39 +0000

What’s this & stuff in the code? Doesn’t help.

By: whocares

whocares — Tue, 25 Feb 2014 17:29:37 +0000

In “The Ugly Code” you increment 3 times the pos_x variable; I think it’s a typo and you meant pos_x, pos_y, pos_z.

By: Tom Kirby-Green

Tom Kirby-Green — Sat, 10 Aug 2013 20:02:02 +0000

I’m pretty sure you don’t need those ‘inline’ keywords. Any method defined within the class declaration is implicitly inline. Lovely article by the way, it would be fabulous if you could keep this particular series of blog posts going! Kudos.

By: Game programming in C++ « C Sharp Important Notes

Game programming in C++ « C Sharp Important Notes — Tue, 04 Sep 2012 05:25:13 +0000

[…] http://higherorderfun.com/blog/2009/06/07/math-for-game-programmers-02-vectors-101/ Share this:TwitterFacebookLike this:LikeBe the first to like this. […]

By: amz

amz — Mon, 03 Sep 2012 23:37:14 +0000

It might not be clear in the body of the article, but the comment on the code itself explains it: imass is the inverse of the mass, therefore multiplying by it is the same as dividing by the mass.

By: Walter Weinzinger

Walter Weinzinger — Mon, 03 Sep 2012 23:17:12 +0000

As a physics major, I was very puzzled with these statements above:

float accel_x = force_x * imass;
float accel_y = force_y * imass;
float accel_z = force_z * imass;

since Newt II states F=ma, or, a=F/m

Did your code actually run correctly?

Thank you!

Walter Weinzinger
Flagstaff, AZ

By: jlmf

jlmf — Mon, 03 Sep 2012 15:02:56 +0000

Well, it is clear thtat you are using object oriented programming. I’m sure the number of operations is exactly the same. The code is much pretty, but not more efficient. By the way I’m in favour of using geometry-algebra-math in programming (in all type of programming). Regards…