[Gambas-user] translating planar coordinates relative to point's angle

[Kevin Fishburne]

I'm disturbed that I couldn't find an answer via Google that wasn't too 
complex for my feeble mind to understand (my fault; I suck at math), so 
I'm asking here.

I'm trying to move a point with an angle/direction/vector relative to 
its angle. Let's say I have these variables:

Dim a as Single ' Point's angle in degrees.
Dim x as Single ' Point's x coordinate.
Dim y as Single ' Point's y coordinate.
Dim xvel as Single ' Point's right/left velocity (+/-).
Dim yvel as Single ' Point's backward/forward velocity (+/-).

What's a good algorithm to figure out the new values of x and y when 
adjusted by xvel and yvel relative to a?

I've looked through a bunch of vector math "tutorials" but they are very 
broad and difficult for me to understand. I'm good at many things, but 
this isn't one of them. Any help will be greatly appreciated.

-- 
Kevin Fishburne
Eight Virtues
www: http://sales.eightvirtues.com
e-mail: sales at ...1887...
phone: (770) 853-6271