I'm looking for:
screenPlace(view.camera, 2Dobject, 3Dobject)
function screenPlace(camera,obj2D,obj3D):void {
some code
obj3D.x = something
obj3D.y = something
}
Given a 3d object and a 2d location (from the stage), move my 3D
object so that it sits on the 2d object's screen position.
On Jun 15, 11:40 am, Michael Iv <[email protected]> wrote:
> yes it does , isn't it what you need?
>
>
>
>
>
> On Tue, Jun 15, 2010 at 5:36 PM, JeffH <[email protected]> wrote:
> > Sorry, I meant "But isn't this is returning the 3D coords for a 2D
> > point based on a 3D
> > objects position?"
>
> > On Jun 15, 10:35 am, JeffH <[email protected]> wrote:
> > > But isn't this is returning the 3D coords for a 3D point based on a 3D
> > > objects position? I think I need to do the opposite. Move a 3D object
> > > (its z=0 btw) to a 2D point based on an object on the stage. Example,
> > > move my 3D boat to a marker on a river where the marker is a 2D flash
> > > object on the stage.
>
> > > On Jun 15, 10:24 am, Michael Iv <[email protected]> wrote:
>
> > > > You are almost correct but you have got to give an offset to the
> > coordiantes
> > > > as view coord system is different from Scene3D
>
> > > > _spriteX=_screenVertex.x+_view.width*.5;
> > > > _spriteY=_screenVertex.y + _view.height*.5;
>
> > > > On Tue, Jun 15, 2010 at 5:10 PM, JeffH <[email protected]> wrote:
> > > > > Hi Michael,
>
> > > > > I'm probably just missing something really easy here but I've seen
> > the
> > > > > following example code which just seems to be for moving a 2D object
> > > > > to a point in the 3D space. Can you show me an example of how I would
> > > > > move a 3D object based on a 2D point? Thanks for your help!
>
> > > > > screenPlace(view.camera, myMovieClip, 3Dobject)
>
> > > > > function screenPlace(camera,who,whob):void {
> > > > > var sc:ScreenVertex;
> > > > > sc = camera.screen(whob)
> > > > > who.x = sc.x + view.x;
> > > > > who.y = sc.y + view.y;
> > > > > }
>
> > > > > On Jun 15, 9:36 am, Michael Iv <[email protected]> wrote:
> > > > > > use ScreenVertex coordinates by accessing camera.screen() method .
> > > > > > :)
>
> > > > > > On Tue, Jun 15, 2010 at 4:34 PM, JeffH <[email protected]> wrote:
> > > > > > > Hi all. I wanted to get the experts' opinions on the best way to
> > > > > > > accomplish what I need to do. I have a 3D object (a boat) that is
> > in a
> > > > > > > view with the camera set to a position and roll (45) to try and
> > > > > > > achieve a "simcity" look. The settings are like this:
>
> > > > > > > view.camera.x = 675; view.camera.y = -675; view.camera.z = -1300;
> > > > > > > view.camera.roll(45); view.camera.lookAt(new Number3D(0, 0, 0));
>
> > > > > > > What I want to do is to move this object based on 2D points
> > located on
> > > > > > > the stage (for example, a path along a river). What is the best
> > way to
> > > > > > > do this? I did try converting 2D points to 3D by trying to get
> > the
> > > > > > > intersect of a ray off a plane but it doesn't seem to work. Not
> > sure
> > > > > > > if it is because I have a camera roll... I tried this based on
> > some
> > > > > > > other posts (where my 2D point is the var pt):
>
> > > > > > > var plane:Plane3D = new Plane3D();
> > > > > > > plane.fromNormalAndPoint(new Number3D(0, 1, 0), new Number3D(0,
> > 0,
> > > > > > > 0));
> > > > > > > var cameraPosition:Number3D = new Number3D(view.camera.x,
> > > > > > > view.camera.y, view.camera.z);
> > > > > > > var ray:Number3D = view.camera.unproject(pt.x, pt.y);
> > > > > > > ray.add(ray, cameraPosition);
> > > > > > > var intersect:Number3D =
> > > > > > > plane.getIntersectionLineNumbers(cameraPosition, ray);
>
> > > > > > > But, intersect.x does not seem to align with pt.x on the screen.
> > > > > > > Perhaps I am misinterpreting how this should work? Should I try
> > to
> > > > > > > orient the stage (Flash CS4) the same way or can I leave that
> > "flat"
> > > > > > > and translate 2D coordinates to the 3D space?
>
> > > > > > > Anyway, thanks for any guidance!
>
> > > > > > --
> > > > > > Michael Ivanov ,Programmer
> > > > > > Neurotech Solutions Ltd.
> > > > > > Flex|Air
> > > > > |3D|Unity|www.neurotechresearch.comhttp://blog.alladvanced.nethttp://
> > > > >www.meetup.com/GO3D-Games-Opensource-3D/
> > > > > > Tel:054-4962254
> > > > > > [email protected]
> > > > > > [email protected]
>
> > > > --
> > > > Michael Ivanov ,Programmer
> > > > Neurotech Solutions Ltd.
> > > > Flex|Air
> > |3D|Unity|www.neurotechresearch.comhttp://blog.alladvanced.nethttp://www.meetup...
> > > > Tel:054-4962254
> > > > [email protected]
> > > > [email protected]
>
> --
> Michael Ivanov ,Programmer
> Neurotech Solutions Ltd.
> Flex|Air
> |3D|Unity|www.neurotechresearch.comhttp://blog.alladvanced.nethttp://www.meetup.com/GO3D-Games-Opensource-3D/
> Tel:054-4962254
> [email protected]
> [email protected]
