Texture from Texture Atlas Find Region or Create Sprite - libgdx

Question

I am trying to get the Texture from Sprite or Atlas Region created by Texture Atlas.
atlas=new TextureAtlas(Gdx.files.internal("Test.pack"));
region=atlas.findRegion("green");
or
Sprite s = atlas.createSprite("red");
texture = s.getTexture();
I have given the name of image in findRegion and createSprite method, it always picks the other image object. I want to get the texture of the image so that part of that texture can be rendered.
Here is the Packer image:
http://i61.tinypic.com/neupo2.png
Even if i try to get green region or red, it always returns blue. Any help would be appreciated.

Answer 1

When you do "textureAtlas.findRegion("objectTexture").getTexture();" (from James Skemp's answer) you're getting the whole texture from the atlas, not just from the region "objectTexture".
Don't bother creating Texture to create the Sprite, you can use the TextureRegion to create the Sprite. Something like this:
atlas=new TextureAtlas(Gdx.files.internal("Test.pack"));
regionGreen=atlas.findRegion("green");
Sprite s = new Sprite(regionGreen);

Answer 2

My use case is slightly different, but I was running into the same issue.
I have an object, which extends Actor, that I want to draw using a region in an atlas.
public class MyObject extends Actor {
private Texture texture;
public MyObject() {
TextureAtlas textureAtlas = new TextureAtlas(Gdx.files.internal("xxx.atlas"));
texture = textureAtlas.findRegion("objectTexture").getTexture();
Gdx.app.log(TAG, "Texture width: " + texture.getWidth());
Gdx.app.log(TAG, "Texture height: " + texture.getHeight());
setBounds(getX(), getY(), Constants.STANDARD_TILE_WIDTH, Constants.STANDARD_TILE_HEIGHT);
// ...
}
#Override
public void draw(Batch batch, float parentAlpha) {
batch.draw(texture,
worldPosition.x * Constants.STANDARD_TILE_WIDTH, worldPosition.y * Constants.STANDARD_TILE_WIDTH,
texture.getWidth(), texture.getHeight());
}
}
Instead of just the region I was expecting I instead received the entire atlas, so my logged texture width and height were 1024 x 128.
Unfortunate, and still not sure why getTexture() returns too much, but switching over to batchDraw(TextureRegion, ...) at least got me in a better place.
public class MyObject extends Actor {
private TextureRegion texture;
public MyObject() {
TextureAtlas textureAtlas = new TextureAtlas(Gdx.files.internal("xxx.atlas"));
texture = textureAtlas.findRegion("objectTexture");
setBounds(getX(), getY(), Constants.STANDARD_TILE_WIDTH, Constants.STANDARD_TILE_HEIGHT);
// ...
}
#Override
public void draw(Batch batch, float parentAlpha) {
batch.draw(texture, getX(), getY());
}
}
Based upon what I saw with my sprites, the questioner was seeing a blue square for the same reason I was; the entire image is getting loaded by getTexture() and since it starts at the bottom left, you're always seeing a blue square.
Using the Sprite(TextureRegion) constructor may have also resolved their issue.

Answer 3

Seems to me your problem is the Test.pack file, not the texture.
It works with this one I packed with GDX Texture Packer:
Test.png
format: RGBA8888
filter: Nearest,Nearest
repeat: none
blue
rotate: false
xy: 1, 1
size: 51, 51
orig: 51, 51
offset: 0, 0
index: -1
green
rotate: false
xy: 54, 1
size: 51, 51
orig: 51, 51
offset: 0, 0
index: -1
red
rotate: false
xy: 107, 1
size: 51, 51
orig: 51, 51
offset: 0, 0
index: -1
yellow
rotate: false
xy: 160, 1
size: 51, 51
orig: 51, 51
offset: 0, 0
index: -1

Answer 4

Use index also to get it.Get the index from pack file or .atlas file.
atlas=new TextureAtlas(Gdx.files.internal("Test.pack"));
region=atlas.findRegion("green",index);
or
Sprite s = atlas.createSprite("red",index);
texture = s.getTexture();