Libgdx学习笔记:照相机的平滑拖动和缩放效果

   不知道线性插值的,自行百度

    核心代码:

    // 缩放平滑因子 

    private float zoomSmothFactor = 5f;

    // 滑动

    private float moveSmothFactor = 12f;


    Vector2 oldZoomVector = new Vector2(0, 1);

    Vector2 newZoomVector = new Vector2(0, 1f);

    Vector2 oldPositionVector = new Vector2();

    Vector2 newPositionVector = new Vector2();


    public void check(){

       // 使用线性内插,起到平顺过度的效果 

        oldZoomVector.lerp(newZoomVector, zoomSmothFactor * Math.min(0.05f, deltaTime));

        if (newPositionVector.x != 0 || newPositionVector.y != 0) {

            oldPositionVector.lerp(newPositionVector, moveSmothFactor * Math.min(0.06f, deltaTime));

        }

        camera.position.x = oldPositionVector.x;

        camera.position.y = oldPositionVector.y;

        camera.zoom = oldZoomVector.y;

   }


 @Override

    public boolean zoom(float initialDistance, float distance) {

        //与pinch对应,也是是一个多点触摸的手势,并且两个手指做出放大的动作

        float zoomFactor = initialDistance / distance;

        newZoomVector.y = zoomFactor; 

        return false;

    }

  在每次绘制前或后,调用check()方法即可。上面的影响因子,可自行调节,以达到最优效果。


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