如何在android libgdx中的一个屏幕中移动两个sprite对象？

Question

I want to add motion to two sprite objects in single game screen . I mean two sprite object should move(or follow some predefined path) independently in single page or game screen of app using Libgdx . How can I achieve that. Please help me. If possible please provide some reference code also. Thank you.

Answer 1

you can use scene2d for this purpose.where you can easily move object through actions. you can follow these links to learn scene2d.

http://www.gamefromscratch.com/post/2013/11/27/LibGDX-Tutorial-9-Scene2D-Part-1.aspx

http://www.gamefromscratch.com/post/2013/12/09/LibGDX-Tutorial-9-Scene2D-Part-2-Actions.aspx

i hope these links will help you.

Answer 2

You can do this:

take two 2DVector objects:

private Vector2 positiononesprite,positiontwosprite;
Sprite sprite_one,sprite_two;

then in your create method do this

positiononesprite = new Vector2(0,0);
positiontwosprite = new Vector2(0,0);

//set your sprite position
sprite_one.setPosition(x,y);//your x and y coordinates
sprite_two.setPosition(x1,y1);//your second sprite postions

positiononesprite.x = sprite_one.getX();
positiononesprite.y = sprite_one.getY();

positiontwosprite.x = sprite_two.getX();
positiontwosprite.y = sprite_two.getY();

/*
then to make them move in a custom direction you can use either
setPosition method or translate method*/

//apply your algorithm on vectors and set or translate your sprites
//    in render method define there speed, direction and move them
//for example i did this to move it in a particular direction

pointerposition.x += directionpointer.x * speed;
            pointerposition.y += directionpointer.y * speed;

            // pointer.setPosition(pointerposition.x, pointerposition.y);
            ball.setPosition(pointerposition.x, pointerposition.y);

this is moving my ball in a particular direction here directionpointer is a direction vector and speed is a float variable and pointerposition is a vector2 object as i declared positiononesprite