libgdx coordinate system differences between rendering and touch input

Question

I have a screen (BaseScreen implements the Screen interface) that renders a PNG image. On click of the screen, it moves the character to the position touched (for testing purpo

Answer 1

The link below discusses this problem.

Projects the given coords in world space to screen coordinates.

You need to use the method project(Vector3 worldCoords) in class com.badlogic.gdx.graphics.Camera.

private Camera camera;
............

@Override
public boolean touchDown(int screenX, int screenY, int pointer, int button) {

Create an instance of the vector and initialize it with the coordinates of the input event handler.

    Vector3 worldCoors = new Vector3(screenX, screenY, 0);

Projects the worldCoors given in world space to screen coordinates.

    camera.project(worldCoors);

Use projected coordinates.

    world.hitPoint((int) worldCoors.x, (int) worldCoors.y);

    OnTouch();

    return true;
}