LibGDX - Get Swipe Up or swipe right etc.?
This explain a very good way to implement a system to detect the direction of a swipe. I'll post it here because the article may be lost in the future:
Create a class name SimpleDirectionGestureDetector
public class SimpleDirectionGestureDetector extends GestureDetector {
public interface DirectionListener {
void onLeft();
void onRight();
void onUp();
void onDown();
}
public SimpleDirectionGestureDetector(DirectionListener directionListener) {
super(new DirectionGestureListener(directionListener));
}
private static class DirectionGestureListener extends GestureAdapter{
DirectionListener directionListener;
public DirectionGestureListener(DirectionListener directionListener){
this.directionListener = directionListener;
}
@Override
public boolean fling(float velocityX, float velocityY, int button) {
if(Math.abs(velocityX)>Math.abs(velocityY)){
if(velocityX>0){
directionListener.onRight();
}else{
directionListener.onLeft();
}
}else{
if(velocityY>0){
directionListener.onDown();
}else{
directionListener.onUp();
}
}
return super.fling(velocityX, velocityY, button);
}
}
}
On the create() function of the LibGdx application, put this to activate gesture handling for your game:
Gdx.input.setInputProcessor(new SimpleDirectionGestureDetector(new SimpleDirectionGestureDetector.DirectionListener() {
@Override
public void onUp() {
}
@Override
public void onRight() {
}
@Override
public void onLeft() {
}
@Override
public void onDown() {
}
}));