How to use Bitmap font as scene 2d actor? - libgdx

Question

I am developing a game using libgdx framework. How can i achieve scene2d action on bitmap font object ? so that i can write some text like score,message and run action like scene2d actor.

Answer 1

Take a look at the Label class, particularly the constructor that takes a CharSequence and a LabelStyle. When you initialize your LabelStyle you can supply a BitmapFont.
Please note, if you'd like to scale or rotate the label you'll need to wrap it in a Container or add it to Table with setTransform() enabled. (This flushes the SpriteBatch so use it wisely.)

Answer 2

you can extend actor class to achieve the same.
like:-
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.g2d.Batch;
import com.badlogic.gdx.graphics.g2d.BitmapFontCache;
import com.badlogic.gdx.graphics.g2d.GlyphLayout;
import com.badlogic.gdx.math.Matrix4;
import com.badlogic.gdx.scenes.scene2d.Actor;
public class FontActor extends Actor
{
private Matrix4 matrix = new Matrix4();
private BitmapFontCache bitmapFontCache;
private GlyphLayout glplayout;
public FontActor(float posX, float posY, String fontText)
{
BitmapFont fnt=new BitmapFont(Gdx.files.internal("time_newexport.fnt"),
Gdx.files.internal("time_ne-export.png"),false);
bitmapFontCache = new BitmapFontCache(fnt);
glplayout=bitmapFontCache.setText(fontText, 0, 0);
setPosition(posX, posY);
setOrigin(glplayout.width / 2, -glplayout.height/2);
}
#Override
public void draw(Batch batch, float alpha)
{
Color color = getColor();
bitmapFontCache.setColor(color.r, color.g, color.b, color.a*alpha);
matrix.idt();
matrix.translate(getX(), getY(), 0);
matrix.rotate(0, 0, 1, getRotation());
matrix.scale(getScaleX(), getScaleY(), 1);
matrix.translate(-getOriginX(), -getOriginY(), 0);
batch.setTransformMatrix(matrix);
bitmapFontCache.draw(batch);
}
public void setAlpha(int a)
{
Color color = getColor();
setColor(color.r, color.g, color.b, a);
}
public void setText(String newFontText)
{
glplayout = bitmapFontCache.setText(newFontText, 0, 0);
setOrigin(glplayout.width / 2, -glplayout.height/2);
}
}
and you can use it like.
Actor actor=new FontActor(20,30,"test");
stage.addActor(actor);
actor.addAction(Actions.moveTo(10,10,1));