Ok, thanks again to everyone, I thought I'd share my final solution
now that it's stable; it does the following:
- give a placemark consisting of an icon and a text above the icon
- the text is centered and comes in a font of your choice
The placemark is put into a 3d object which (in turn) can be put into
the scene. Things you need to replace are marked with //TODO.
package customobjects //TODO replace with your package
{
import away3d.sprites.MovieClipSprite;
import flash.display.Bitmap;
import flash.text.TextField;
import org.aswing.AssetIcon;
import flash.display.Sprite;
import flash.text.TextFormat;
import flash.text.TextFormatAlign;
import flash.display.PixelSnapping;
import flash.text.TextFieldAutoSize;
import flash.text.AntiAliasType;
import away3d.core.utils.Cast;
/**
* @author gabriel
*/
public class PlacemarkObject extends MovieClipSprite
{
// The following two lines embed the font that you are
going to use:
[Embed(source = "assets/verdana.ttf", fontFamily =
"verdana", mimeType = "application/x-font-truetype")] //TODO replace
"assets/verdana.ttf"
private var _font:String;
// The following two lines embed the icon you are going
to use:
[Embed(source="assets/icon.png")] //TODO replace
"assets/icon.png"
private var _icon:Class;
private var placemark:Sprite;
private var label:TextField;
private var icon:Bitmap;
// these options are hard-coded for the moment; you
could give them to your constructor instead, if you like.
private const FONT_NAME:String = "verdana";
private const FONT_SIZE:Number = 14;
private const FONT_COLOR:uint = 0x000000;
private const PLACEMARK_SIZE:Number = 24;
public function PlacemarkObject(text:String = "", init:Object =
null)
{
placemark = new Sprite();
var format:TextFormat = new TextFormat();
format.font = FONT_NAME;
format.color = FONT_COLOR;
format.size = FONT_SIZE;
label = new TextField();
label.embedFonts = true;
label.autoSize = TextFieldAutoSize.CENTER;
label.antiAliasType = AntiAliasType.ADVANCED;
label.defaultTextFormat = format;
label.text = text;
label.selectable = false;
label.x = 0;
label.y = -PLACEMARK_SIZE * 0.75; // 0.75 was obtained
empirically, you can put something else here if you wish
icon = new Bitmap(Cast.Bitmap(_icon));
icon.width = PLACEMARK_SIZE;
icon.height = PLACEMARK_SIZE;
icon.x = (label.width / 2) - (PLACEMARK_SIZE / 2);
icon.y = (label.height/ 2) - (PLACEMARK_SIZE / 2);
icon.smoothing = true;
icon.pixelSnapping = PixelSnapping.ALWAYS;
placemark.addChild(icon);
placemark.addChild(label);
super(placemark, init);
this.rescale = false; //TODO if you set this to true,
placemark
will scale with camera distance
this.deltaZ = -1000; //TODO this lets the placemark be
rendered
before all other objects, you may or may not need this depending upon
your app
}
public function get text():String {
return label.text;
}
public function set text(value:String):void {
label.text = value;
}
}
}
On 3 Apr., 14:39, Fabrice <[email protected]> wrote:
> Gabriel,
> Its a very easy thing to do using 2d sprites
> just make a movieclip instance, _mc, and pass it to the
> MovieClipSprite Class like this
>
> //if you need some mouse interaction...
> _mc.addEventListener(MouseEvent.MOUSE_DOWN, dosomething);
> // declare the instance
> var mymarker: MovieClipSprite = new MovieClipSprite(_mc, {scaling:2,
> rescale:true, align:"center"});
> // show
> view.scene.addChild(mymarker);
>
> notice the new "align" property... if you want no align for custom
> purposes, just {align:"none"}
>
> For the BBC project I'm using a bit more complex pointers, dynamically
> generated.
> but it come basically to this:
> make a ObjectContainer3D, add your 3D and 2D. Drive the container.
>
> Fabrice
>
> On Apr 3, 2009, at 2:10 PM, gabe wrote:
>
>
>
> > i need to display aplacemark(an icon and a text directly on top of
> > it) over a location in 3d space. i figured out i could use a textbox
> > for the text, which is wrapped into a sprite; however, the text should
> > be right on top of the icon, and the origin of the whole thing should
> > be at the bottom. i am not a flash guru, i merely work with
> > papervision using FlashDevelop. The question is whether the placemarks
> > provided in aforementioned demo were made programmatically (and how)
> > or were they somehow clicked together in a flash (flex?) ide.
>
> > cheers,
> > gabriel
