Develop Reference

Panning the view of a gameObject instead of the camera in Unity3d?

I'm having a hard time to pan a view of a gameObject in Unity3d. I'm new to scripting and I'm trying to develop an AR (Augmented Reality) application for Android.
I need to have a gameObject (e.g. a model of a floor), from the normal top down view, rendered to a "pseudo" iso view, inclined to 45 degrees. As the gameObject is inclined, I need to have a panning function on its view, utilizing four (4) buttons (for left, right, forward(or up), backward(or down)).
The problem is that, I cannot use any of the known panning script snippets around the forum, as the AR camera has to be static in the scene.
Need to mention that, I need the panning function to be active only at the isometric view, (which I already compute with another script), not on top down view. So there must be no problem with the inclination of the axes of the gameObject, right?
Following, are two mockup images of the states, the gameObject (model floor) is rendered and the script code (from Unity reference), that I'm currently using, which is not very much functional for my needs.
Here is the code snippet, for left movement of the gameObject. I use the same with a change in -, +speed values, for the other movements, but I get it only move up, down, not forth, backwards:
#pragma strict
// The target gameObject.
var target: Transform;
// Speed in units per sec.
var speedLeft: float = -10;
private static var isPanLeft = false;
function FixedUpdate()
{
if(isPanLeft == true)
{
// The step size is equal to speed times frame time.
var step = speedLeft * Time.deltaTime;
// Move model position a step closer to the target.
transform.position = Vector3.MoveTowards(transform.position, target.position, step);
}
}
static function doPanLeft()
{
isPanLeft = !isPanLeft;
}
It would be great, if someone be kind enough to take a look at this post, and make a suggestion on how this functionality can be coded the easiest way, as I'm a newbie?
Furthermore, if a sample code or a tutorial can be provided, it will be appreciated, as I can learn from this, a lot. Thank you all in advance for your time and answers.

If i understand correctly you have a camera with some fixed rotation and position and you have a object you want to move up/down/left/right from the cameras perspective
To rotated an object to a set of angles you simply do
transform.rotation = Quaternion.Euler(45, 45, 45);
Then to move it you use the cameras up/right/forward in worldspace like this to move it up and left
transform.position += camera.transform.up;
transform.position -= camera.transform.right;
If you only have one camera in your scene you can access its transform by Camera.main.transform
An example of how to move it when someone presses the left arrow
if(Input.GetKeyDown(KeyCode.LeftArrow))
{
transform.position -= camera.transform.right;
}

RegisterTouch Area saving Two Points

I am developing my first app in Andengine for the first time.Description of my project is:
4 pieces are placed near to each other
move and place 4 pieces to 4 different plates
on a successful placement of 4 different pieces to 4 different plates, I generate 4 new pieces and then step(1) ,(2) and (3) continue.
Now I have implemented this scenario like this:
At initial i made new BitmapTextureAtlas1 and sprites1 and allocated specifics position
for new Object i made new BitmapTextureAtlas and assigned to previous BitmapTextureAtlas1 and similar to sprites
3.I registerToucharea and atachchild and then unregisterTouchArea and DeatachChild and Follow(1 and 2 and 3)
Is this right Approach to do It.
The problem I face is this:
When i place pices1 To any plate ,It moves Successfully but their is some thing hidden at initial place of pices1 that when i again move from initial place of pice1 to any plate ..my flag increment that some object is moved

From #GulZar question:
Is this right Approach to do It?
Answer: No. You always load the resources(Graphics) before starting game play & it should only once.After finished the use of sprite you can call BitmapTextureAtlas.unload();
May be you think: Every time detaching a Sprite, You need to load Graphics again. Detaching a sprite is only cause to remove it from the scene, not from the memory.
You can create custom sprite class to use frankly. Example:
public class Food extends PixelPerfectAnimatedSprite {
public Food(float pX, float pY,
PixelPerfectTiledTextureRegion pTiledTextureRegion,
VertexBufferObjectManager pVertexBufferObjectManager) {
super(pX, pY, pTiledTextureRegion, pVertexBufferObjectManager);
}
#Override
public boolean onAreaTouched(TouchEvent pSceneTouchEvent,
float pTouchAreaLocalX, float pTouchAreaLocalY) {
return true;
}
#Override
public void onAttached() {
super.onAttached();
}
}
Here, I extend PixelPerfectAnimatedSprite for pixel perfect collision. You can use Sprite or AnimatedSprite. Then you can override onAreaTouched,onAttached() and all overrides method from Entity. Now, Inside onAreaTouched() you write logic what happens in moving.
After Doing above, you can call it From your Game play Scene. When a player moves one pieces to a plate, then set a condition/Flag either new pieces would be attached or not. Depends on your logic. Explain more to get a good tweet.

setTextureRegion AnimatedSprite

I'm developping a game which implements gif sprites...
After start with gif I used png image and for change the TextureRegion of my sprite I followed this guide: Sprite.setImage() in andengine and it worked very well.
Now I want to do the same thing with AnimatedSprite. Can someone tell me How i can edit the org.anddev.andengine.entity.sprite.AnimatedSprite.java to create:
sprite.setAnimatedTextureRegion(PixelPerfectTiledTextureRegion textureRegion)
P.S I use also PixelPerfect

The AnimatedSprite class uses the same texture region declared in BaseSprite, so the code in the link you gave will work - just paste it in the AnimatedSprite.java file:
public void setTiledTextureRegion(TiledTextureRegion textureRegion) {
this.mTextureRegion = textureRegion;
}
Note: If the different tiled textures have different number of tiles (So each has a different animation parameters associated with it) you should handle it in your code. It may get complicated, so I'd just create a new AnimatedSprite instead of replacing the texture region.

How to create a circular loop of animations in AndEngine?

I want to do an "chain" or circular loop of animations as can be described below:
LABEL start
do Anim1->Anim2->Anim3->Anim4
GOTO start
The above will do a circular loop: Anim1->Anim2->Anim3->Anim4 and back to Anim1 and so on.
I am not able to merge all the PNGs in one Texture because Andengine/Android is limited in loading the resources. However, when I split my initial large tile into 4 smaller tiles, everything works fine.
I tried to use an AnimationListener inside Anim1. When onAnimationFinished() is called, I detach Anim1, and run Anim2 and do this in chain of inner functions. However, when I am in Anim4, I do not know how to go back to the start and attach Anim1.
Note: All this problem could be solved if you know how I can pack a set of 150 PNGs that individually quite large but fit in a tile of 4096x4096 px.
Thank you for your help!
EDIT (following JiMMaR's proposed solution):
I am using Texture Packer and the overall Texture exceeds 4096*4096, causing an OutOfMemory error on Android.
At the moment, I have split the Textures into four tiles and I four PNG tilemaps.

You can use 'Texture Packer' to see if all your images can fit in 4096 x 4096.
You can download Texture Packer from here. (NOTE: Texture Packer supports AndEngine data output too)
You can use "BuildableBitmapTextureAtlas" and "BlackPawnTextureAtlasBuilder" classes to pack your PNGs into one texture atlas.

You should post some code so we can see the implementation.
Try to use several AnimatedSprites with animation listeners in each one. This way you can start the animation of the next sprite in the onAnimationFinished() call.
private class AnimationLooperListener implements IAnimationListener{
private AnimatedSprite nextSpriteToAnimate;
public AnimationLooperListener(AnimatedSprite sprite){
nextSpriteToAnimate = sprite;
}
/** other methods are hidden */
public void onAnimationFinished(AnimatedSprite sprite){
sprite.setVisible(false);
nextSpriteToAnimate.setVisible(true);
nextSpriteToAnimate.animate(100, new AnimationLooperListener(sprite);
}
}
AnimatedSprite sprite1 = new AnimatedSprite(0, 0, tiledTextureRegion, vertex);
AnimatedSprite sprite2 = new AnimatedSprite(0, 0, tiledTextureRegion, vertex);
AnimatedSprite sprite2 = new AnimatedSprite(0, 0, tiledTextureRegion, vertex);
AnimationLooperListener listener1 = new AnimationLooperListener(sprite2);
AnimationLooperListener listener2 = new AnimationLooperListener(sprite3);
AnimationLooperListener listener3 = new AnimationLooperListener(sprite1);
sprite1.animate(100, listener1);
sprite2.animate(100, listener2);
sprite3.animate(100, listener3);
This way, you have an animation loop, between several sprites that can be created using several TiledTextureRegions.

How to add sprite as child sprite to another sprite in andengine?

I am developing game using andengine. I want to add a sprite as a child to another sprite so that sprite will rotate along with another sprite. Since I am new to andengine I didn't know how to add sprite as a child. By rotating main sprite the child has to rotate with it.
Some of them suggest to call sprite.attachChild() method to add as child but I can't get this method. I am extending BaseGameActivity.
Edited: Some of them says it's due to old version of andengine. Would anyone give me link for download new version of andengine?

AnimatedSpriteHelicopter mSpriteHelicopter = new AnimatedSpriteHelicopter(0, 0, this.mTRHelicopter);
mSpriteHelicopter.animate(50);
this.mScene.getChild(GameLayers.HELICPTER_LAYER).attachChild(mSpriteHelicopter);
this.mScene.registerTouchArea(mSpriteHelicopter);
this.mScene.setTouchAreaBindingEnabled(true);
// ==========================
// Missile
// ===========================
AnimatedSpriteMissile mMissile = new AnimatedSpriteMissile(0, 0, this.mTRMissile);
mMissile.animate(100);
mSpriteHelicopter.attachChild(mMissile);
return this.mScene;
Just a sample code. now missile will move with helicopter sprite :) very simple.
I have my own classes extended with AnimatedSprite.

The source code is located at http://code.google.com/p/andengine/ and indeed sprite composition is a feature in the most recent version of AndEngine as verified in this forum thread.
I'm using it and can personally verify that it's functional.