随着时间的推移，libgdx modelinstance平滑地翻译3d对象

Question

I'm trying to make a 3d character within a top-down view move in the xy directions when the player uses touchDown input. So far, I have a cube, using LibGDX ModelInstance, moving whenever the screen is touched, but the cube only moves by a set amount of units; what I really want is for the cube to move by that set amount of units over time for however long the player has the touchDown event called.

I have something like this:

instance.transform.translate(movementRight);

where movementRight is a Vector3(5, 0, 0); This moves the cube over to the right 5 units once when the player uses the touchDown input. How can I hook this up to update every frame? Any help is appreciated. Thank you very much!

Answer 1

Have a boolean flag that indicates when the cube should be moving right, like this:

boolean isMovingRight = false;

Set it to true in the touchDown event, and to false in the touchUp event.

Then in your render method, do something like this:

if(isMovingRight){
    instance.transform.translate(5*delta, 0, 0);
}

This will move the instance 5 units per second, it is very important to do it like this,using delta, so It moves at the same speed independant of FPS .