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Sandy's Forum _ AS2 1.x versions _ Finding an objects vertices?

Posted by: ravenblight Jan 11 2007, 11:21 AM

Hey guys, it's me gain. I'm still trying to implement normal flash movieclips which can follow a 3d object. I'm having some problems trying to find out the location of the vertices of a box (type:quad Quality:1). I extracted the variables from aPoints but none of those variables seem to relate to the simle lines which are drawn.

Is there something I'm doing wrong?

Otherwise, has anybody got any suggestions on how I can do this?

Thanks!!

Posted by: evanFlash Mar 1 2007, 07:49 PM

Hey there.
You're in the right place. "aPoints" is an array of Vertex objects describing the Object3D. To make a movie clip follow along, you need to know the on screen coordinates of whichever vertex you'd like to follow. Lucky for you (and me, since i'm using this in a project right now) the Vertex class has public properties "sx" and "sy". These are the x and y coordinates on your screen. All you need to do is keep your movie clip centered on these coordinates and viola! no complex 3d math involved!

myMovie._x = myVertex.sx

or something of that nature, depending on the relative location of your screen in the root movie clip.

Posted by: ravenblight Mar 5 2007, 02:02 PM

Hey, thanks. I'll have to try that. I wish i had known the was an 'sx' property. I ended up doing this :

var coords:String = plane.aPoints[0].toString()
var cas:Number = coords.indexOf("tx:")+3
var cae:Number = coords.indexOf("ty:")-1
_global.sxcoord = coords.substring(cas,cae)
var cbs:Number = coords.indexOf("ty:")+3
var cbe:Number = 16
_global.sycoord = coords.substr(cbs,cbe)
btnOver._x = sxcoord
btnOver._x = sycoord
trace(box.aPoints[0].toString());
trace("sx: "+sxcoord)
trace("sy: "+sycoord)

Oopsie!!

Thank again though!!