Moving object with a matrix ( 2d, f#)

Asked Oct 29 '15 at 14:21

Active Oct 29 '15 at 15:05

Viewed 173 times

I'm wondering if it is possible to move an object (for example a sphere) with a matrix. I've created a type: Ball and I've added a method:

let translateW (tx, ty) =
    m.Translate(tx, ty)

where m is Drawing2d.Matrix()

on the Paint method I wrote:

let g = e.Graphics      
g.Transform <- m

but I'm not updating a Ball object, I'm just translating the view... how can I move the ball instead?

edited Oct 29 '15 at 15:05

Mark Seemann

asked Oct 29 '15 at 14:21

Levenlol

Apply the matrix to the ball's center point? – Fyodor Soikin Oct 29 '15 at 14:55
so basically: P' = P*M where * is multiply a Point for a matrix ? – Levenlol Oct 29 '15 at 15:02
Well, yes, I would think so. Why, do you see some problems with it? – Fyodor Soikin Oct 29 '15 at 15:04
mm no, but i would like to know if there were other ways for doing that.. do u have any ? – Levenlol Oct 29 '15 at 15:08
2

I don't quite understand the question. What's wrong with this way? – Fyodor Soikin Oct 29 '15 at 15:14
nothing at all, it's completely fine. as i said i was just wondering any other ways to accomplish the same result – Levenlol Oct 29 '15 at 15:26

0 Answers0