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c#actionscript-3vectorxnaflixel

Adding to a vector2 in C#? How so?

I'm doing a bit of trial and error with Flash/AS3 and Flixel to make a car move to various waypoints on its own. Anyway I have found some code by Microsoft for XNA/C# and am trying to convert it but am stuck on two bits to do with vectors...

location = location + (Direction *
                    MoveSpeed * elapsedTime);

"location" is a Vector2.

Similarly:

tank.Location + (orth * turningRadius)

".Location" and "orth" are also both Vector2's.

Can anybody tell me what this is actually doing?

I don't understand how you can add or multiply a single number to a Vector2 but maybe I am missing something obvious!!

Cheers

Chris

Solution

  • The compiler is doing some nice things for you. In effect what the code is doing is this:

    location.X += (orth.X * turningRadius);
location.Y += (orth.Y * turningRadius);

    A quick and simple vector math intro: http://johnnygizmo.blogspot.com/2008/10/xna-sidebar-intro-to-vector-math.html