Spinning in papervision

[kyma]

I'm playing around with papervision. When I create an object, for example a sphere and the use sphere.yaw to spin it around, it is consistently leaving the original where it is: ie spinning but leaving a copy. Can anyone explain this?

[ASWC]

You need to clear the graphics object on each frames.

[kyma]

Can you tell me how to do that?

[Gibbah]

Perhaps you have created 2 spheres?

Are you rendering the scene, camera and viewport onEnterFrame?

[kyma]

Here's the code. Ball.yaw() is called in processframe at the bottom. My baseclass uses on enterframe to call processframe :

package {
import flash.events.KeyboardEvent;

import org.papervision3d.cameras.FreeCamera3D;
import org.papervision3d.materials.BitmapFileMaterial;
import org.papervision3d.materials.utils.MaterialsList;
import org.papervision3d.objects.primitives.Cube;
import org.papervision3d.objects.primitives.Plane;
import org.papervision3d.objects.primitives.Sphere;
public class Walkabout extends PaperBase {
public var upDown:Boolean = false;
public var downDown:Boolean = false;
public var leftDown:Boolean = false;
public var rightDown:Boolean = false;
public var camera:FreeCamera3D;
public var ball:Sphere;
public var wires:BitmapFileMaterial = new BitmapFileMaterial("Assets/MetalGrid.jpg");
public var box:Cube;
public var boxSkin:BitmapFileMaterial = new BitmapFileMaterial("Assets/fluffy.png");
public function Walkabout() {
init();
stage.addEventListener(KeyboardEvent.KEY_DOWN, onKeyDown);
stage.addEventListener(KeyboardEvent.KEY_UP, onKeyUp);
}
public function onKeyDown( event:KeyboardEvent ):void {
// The keycodes for the W,A,S & D keys are:
// W: 87
// A: 65
// S: 83
// D: 68
// -------
switch(event.keyCode) {
case 38:
upDown = true;
break;
case 40:
downDown = true;
break;
case 37:
leftDown = true;
break;
case 39:
rightDown = true;
break;
}
}
public function onKeyUp( event:KeyboardEvent ):void {
switch(event.keyCode) {
case 38:
upDown = false;
break;
case 40:
downDown = false;
break;
case 37:
leftDown = false;
break;
case 39:
rightDown = false;
break;
}
}
override protected function init3d():void {
camera = new FreeCamera3D(1, 500);
camera.moveUp(200);
current_camera = camera;
for (var x:Number = 0; x <8; x++) {
for (var y:Number = 0; y <8; y++) {
var p:Plane = new Plane(new BitmapFileMaterial("Assets/texture.jpg"), 550, 405, 8, 8);
p.pitch(90);
p.x = (x * 550)-2200;
p.z = (y * 405)-1000;
default_scene.addChild(p);
}
ball = new Sphere(wires,100,16,16);
ball.y= 100;
default_scene.addChild(ball);

box = new Cube(new MaterialsList ({ all: boxSkin }),500,50, 50);
box.y =140;
box.x = -200;
box.roll(25);
default_scene.addChild(box);

}
}
override protected function processFrame():void {
if (upDown) {
camera.moveForward(60);
}
if (downDown) {
camera.moveBackward(60);
}
if (leftDown) {
camera.yaw( -8);
}
if (rightDown) {
camera.yaw( 8);
}

ball.yaw(6);
}
}
}

[Gibbah]

I don't quite understand how you do it but I allways use a renderer.
Something like this:


import org.papervision3d.cameras.FreeCamera3D;
import org.papervision3d.objects.primitives.Sphere;
import org.papervision3d.render.BasicRenderEngine;
import org.papervision3d.scenes.Scene3D;
import org.papervision3d.view.Viewport3D;


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

var viewport:Viewport3D = new Viewport3D( 800, 600, false, true );
addChild( viewport );

var mySphere:Sphere = new Sphere(null,500,15,15);
scene.addChild(mySphere);

addEventListener(Event.ENTER_FRAME, loop);

function loop(e:Event):void{
mySphere.yaw(6);
renderer.renderScene(scene, camera, viewport);
}

[kyma]

I've got a load of setup methods in a class: PaperBase. This contains:

protected function onEnterFrame( ThisEvent:Event ):void {
//We need to render the scene and update anything here.
processFrame();
renderer.renderScene(current_scene, current_camera, current_viewport);
}

current_scene is a variable holding the scene etc...

[jbailey]

CS4 and FlashPlayer10.... just saying ;-)

[kyma]

I'm using flex builder3, but what's the relevance of that?

[jbailey]

I'm using flex builder3, but what's the relevance of that?

http://video.google.com/videosearch?q=Flash+Player+Astro&sitesearch=#

Take it from me, Flash CS4 combined with FP10 will provide us all with POWERFUL tools for the LONG, LONG anticipated and craved 3D.

For instance, .rotationY and .rotationX but more importantly .z and .rotationZ :) "native" for DisplayObjects!

http://labs.adobe.com/technologies/flashplayer10/

[ASWC]

lol, I heard also that in about 20 years from now we'll code just by thinking of what we want and a program will write everything for us. So either kima can decide to finish what he's doing now or he can wait until the end of the year or why not 20 years!

[jbailey]

lol, I heard also that in about 20 years from now we'll code just by thinking of what we want and a program will write everything for us. So either kima can decide to finish what he's doing now or he can wait until the end of the year or why not 20 years!

ok mr.insult, I am excited about the development that is just around the corner and many of us already have access to. It was a small insert that I'd anticipated would reciprocate mutual excitement, especially if that's what you're already using. Adobe makes great strides in building excitement for features that are responses from their user base (ie. us). Moreover, I thought it would encourage him/her to know that it will be much easier soon. I don't believe the forums are for snide remarks and appreciate your input but holding back on the all too infamous know-it-all attitude is more appreciated and appropriate, especially for forums where new comers often frequent.

[Gibbah]

I've got a load of setup methods in a class: PaperBase. This contains:

current_scene is a variable holding the scene etc...

Ah, i see. I havnt used PaperBase myself but when I look at your code it looks like you are rendering current_scene but adding the sphere to default_scene. Perhaps that has something to do with it, I don't know, Im really guessing here :p