Hi Hardc0d3r
hardc0d3r <[EMAIL PROTECTED]> wrote on 07/16/2008 10:43:06 AM:
> i did not quite understand.. where will i get the matrix? through the
element
> that i want the coordinates converted?
Yes you get the screen CTM from the element who's local coordinate
system you want to convert to screen coordinates.
> do i get the inverse of the matrix and apply it to the point?
I don't think you need to get the inverse of the matrix.
> i did that but i get the coordinates on the
> canvas and not on the screen..
Umm, are you saying that you can't figure out how to map from
canvas pixel coordinates to screen pixel coordinates?
Try adding the results of calling:
canvas.getLocationOnScreen()
BTW it is correct (at least for SVG 1.1) for getScreenCTM to
convert to the canvas coordinate system (same coordinate system
as clientX/Y, not screenX/Y in a DOM Mouse Event).
> thomas.deweese wrote:
> >
> > Hi HardCod3r,
> >
> > hardc0d3r <[EMAIL PROTECTED]> wrote on 07/15/2008 04:09:11 AM:
> >
> >> Thanks! That solved the problem! Another question.. How do i convert
the
> >> coordinates of the element to the coordinates of the screen/overlay?
> > What
> >> classes and/or methods do i use?
> >
> > I would suggest using the SVG DOM 'getScreenCTM' method to get
> > the transform to the screen coordinate system. Then you can run your
> > points through that transform to get the screen coordinate for them.
> >
> > You need to take some care with what attributes you do this with,
> > some attributes are in the element's local coordinate system (i.e.
> > rect elements 'x', 'y') and some attributes 'define' the element's
> > local coordinate system (i.e. the use element's 'x' & 'y' attributes).
> >
> >
> >
>
> --
> View this message in context: http://www.nabble.com/getting-the-
> element-in-svg-from-an-overlay-tp18301441p18489087.html
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>
>
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