Thanks for pointing out that I shouldn't snap off a reply early in the
morning. Obviously I meant
snappedX = userCoord.x*Math.round( gridSizeX/gridSizeX );
Which makes a lot more sense than what I said before.
G. Wade
On Thu, 17 Nov 2005 13:08:50 +0000
Martyn Eggleton <[EMAIL PROTECTED]> wrote:
> G. Wade Johnson wrote:
> > Sorry to break in on this, but ...
> >
> > On Thu, 17 Nov 2005 10:34:18 +0000
> > Martyn Eggleton <[EMAIL PROTECTED]> wrote:
> >
> >
> >> Ok I'll try (forgive if i end up patronising or not clear)
> >>
> >>
> >
> > [snip]
> >
> >
> >> function mousemove(evt)
> >> {
> >>
> >> var gridSizeX = 1; //The length of each element of the grid in the
> >> userCordinate space, 0 is now snapping;
> >> var gridSizeY= 1;
> >> var userCoord = getUserCoordinate(evt.ClientX, evt.ClientY) //you
> >> will either have your own getUserCoordinate equivelant or go look one up
> >> (eg kevlindev), I'm assuming it returns a point);
> >> var snappedX = userCoord.x;
> >> var snappedY = userCoord.y;
> >>
> >> if (gridSizeX)
> >> {
> >> snappedX = Math.round(userCoord.x*gridSizeX)/gridSizeX;
> >>
> >
> > shouldn't this be
> >
> > snappedX = Math.round( userCoord.x*gridSizeX/gridSizeX );
> >
> > You want to round after the divide.
> >
> Sorry but mathatically that its the same as
>
> snappedX = Math.round( userCoord.x);
>
> which doesn't allow you to specify the gridSizre at all
>
>
> >
> >> }
> >>
> >> if (gridSizeY)
> >> {
> >> snappedY = Math.round(userCoord.y*gridSizeY)/gridSizeY;
> >>
> >
> > And, equivalently,
> >
> > snappedY = Math.round( userCoord.y*gridSizeY/gridSizeY );
> >
> >
> >> }
> >>
> >> // do what you want from here on out.
> >>
> >> }
> >>
> >
> > G. Wade
> >
> >
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
>
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