@Override
public boolean pinch(
Vector2 initialFirstPointer,
Vector2 initialSecondPointer,
Vector2 firstPointer,
Vector2 secondPointer) {
if (!(initialFirstPointer.equals(oldInitialFirstPointer)
&& initialSecondPointer.equals(oldInitialSecondPointer))) {
oldInitialFirstPointer = initialFirstPointer.cpy();
oldInitialSecondPointer = initialSecondPointer.cpy();
oldScale = gameScreen.getCameraZoom();
}
Vector3 center =
new Vector3(
(firstPointer.x + initialSecondPointer.x) / 2,
(firstPointer.y + initialSecondPointer.y) / 2,
0);
gameScreen.zoomCamera(
center,
oldScale * initialFirstPointer.dst(initialSecondPointer) / firstPointer.dst(secondPointer));
return true;
}
/**
* Update position & velocity vectors given acceleration and deltaTime
*
* @param deltaTime
*/
private void updatePosition(float deltaTime) {
if (accel.len() > 0) {
accel.scl(deltaTime); // dv = a * dt
velocity.add(accel.x, accel.y); // vf = vi + dv
// Limit velocity to max
if (velocity.len() > MAX_VELOCITY) {
velocity.nor().scl(MAX_VELOCITY);
}
}
Vector2 deltaPos = new Vector2(velocity.x * deltaTime, velocity.y * deltaTime);
Vector2 newDelta = Collision.tryMove(this, bounds, deltaPos);
if (!newDelta.equals(deltaPos)) { // We hit something
stopMoving();
}
position.add(newDelta); // d = d*dt
}