pv3d.org ARCHIVE

Example: 2D Coordinates from a 3D Object

March 18, 2008 – 1:23 pm

[source:javascript]
package {

import caurina.transitions.Tweener;

import flash.display.Sprite;
import flash.events.Event;
import flash.text.TextField;
import flash.text.TextFieldAutoSize;
import flash.text.TextFormat;

import org.papervision3d.cameras.FreeCamera3D;
import org.papervision3d.materials.MovieMaterial;
import org.papervision3d.objects.primitives.Plane;
import org.papervision3d.render.BasicRenderEngine;
import org.papervision3d.scenes.Scene3D;
import org.papervision3d.view.Viewport3D;

[SWF(width="640", height="480", backgroundColor="0xFFFFFF")]
public class TwoDCoordinates extends Sprite
{

private var viewport:Viewport3D;
private var scene:Scene3D;
private var camera:FreeCamera3D;
private var renderer:BasicRenderEngine;

private var boringSprite:Sprite;

private var spriteMaterial:MovieMaterial;

private var awesomePlane:Plane;

public function TwoDCoordinates()
{
init();
}

private function init():void
{
viewport = new Viewport3D(640,480);
addChild(viewport);

scene = new Scene3D();
camera = new FreeCamera3D();
renderer = new BasicRenderEngine();

createBoringSprite();
createMaterials();
createObjects();

tween3DStuff();

addEventListeners();
}

private function createBoringSprite():void
{
boringSprite = new Sprite();
boringSprite.graphics.beginFill(0×00cc00);
boringSprite.graphics.drawRect(0,0,50,50);

var format:TextFormat = new TextFormat(”Arial”, 32, 0×000000);

var tf:TextField = new TextField();
tf.text = “2D”;
tf.setTextFormat(format);

boringSprite.addChild(tf);

addChild(boringSprite);
}

private function createMaterials():void
{
var sprite:Sprite = new Sprite();
sprite.graphics.beginFill(0xcc0000);
sprite.graphics.drawRect(0, 0, 600, 600);

var format:TextFormat = new TextFormat(”Verdana”, 144, 0×000000);

var tf:TextField = new TextField();
tf.text = “3D”;
tf.autoSize = TextFieldAutoSize.LEFT;
tf.setTextFormat(format)
sprite.addChild(tf);

spriteMaterial = new MovieMaterial(sprite, true);
spriteMaterial.smooth = true;
}

private function createObjects():void
{
awesomePlane = new Plane(spriteMaterial);
scene.addChild(awesomePlane);
}

private function tween3DStuff():void
{
Tweener.addTween(awesomePlane,
{
x:Math.random() * 1500 - 750,
y:Math.random() * 1500 - 750,
z:Math.random() * 750,

onComplete:tween2DStuff,

time:1
});
}

private function tween2DStuff():void
{
Tweener.addTween(boringSprite,
{
x:awesomePlane.screen.x + viewport.width/2,
y:awesomePlane.screen.y + viewport.height/2,

/*Alternatively, you can get the x and y
from the individual vertices of the plane:
awesomePlane.geometry.vertices[vertexIndex].vertex3DInstance.x
*/

onComplete:tween3DStuff,

time:1
});
}

private function addEventListeners():void
{
addEventListener(Event.ENTER_FRAME, render);
}

private function render(e:Event):void
{
renderer.renderScene(scene, camera, viewport);
}
}
}
[/source]