Box2d libgdx, a bit confused about the pixels to meters stuff

Question

So I understand the concept. The idea is that box2d more or less works in meters, so you need to do a conversion from pixels to it. Makes sense. I was following the tutorial/int

Answer 1

I do like you are doing but might be a little different.

Might be a little overkill but here's my jucl port

jucl/Android - pastebin

Then I just have utility classes ie:

public class Pixel {

    public static float toMeter(float pixels) {
        return (float)LengthConversions.Pixel2SIf(pixels);
    }

    public static Vector2 toMeter(Vector2 vecPixel) {
        return new Vector2(Pixel.toMeter(vecPixel.x), Pixel.toMeter(vecPixel.y));
    }
}

public class Meter {

    public static final float METERS_PER_PIXEL = (float) LengthConversions.SI_PIXEL;

    public static float toPixel(float meter) {
        return (float)LengthConversions.SI2Pixelf(meter);
    }
}

In my initialize:

int graphicsWidth = Gdx.graphics.getWidth();
int graphicsHeight = Gdx.graphics.getHeight();

CAMERA_WIDTH_METERS = Pixel.toMeter(graphicsWidth);
CAMERA_HEIGHT_METERS = Pixel.toMeter(graphicsHeight);

Then in my game classes (like your Player class). In my case it was a pinball game so i have Flipper, Ball, Bumper, etc. I have a @Override render() method where I sync up the sprite with the physics body.

Here's an example file..sry it's messy but might be helpful.

Pinball Engine Class file