unity3d - 为什么我不能缩放我的 Unity2D 正交游戏？

Question

我看过几个视频和帖子，表明我应该能够在游戏过程中通过更改 MainCamera(Unity 2D 游戏，正交投影)的 Size 参数来缩放摄像机 View 。这样做会放大和缩小场景 View ，但我在检查器中的任何地方所做的任何更改都不会改变游戏 View 。

谁能给个建议？谢谢。

Answer 1

正交尺寸定义了相机的观察体积，它只会放大由它渲染的元素。看起来您正在尝试放大 Canvas，但 UI 元素呈现在整个场景的顶部。

为了放大和缩小，您可以:

1. 将 Canvas Render Mode 设置为World Space，然后将它放在相机前面

2. 使用可让您放大 Canvas 的脚本，请查看此处:Pinch zoom on UI

    public class PinchZoom : MonoBehaviour
    {
        public Canvas canvas; // The canvas
        public float zoomSpeed = 0.5f;        // The rate of change of the canvas scale factor
   
        void Update()
        {
            // If there are two touches on the device...
            if (Input.touchCount == 2)
            {
                // Store both touches.
                Touch touchZero = Input.GetTouch(0);
                Touch touchOne = Input.GetTouch(1);
   
                // Find the position in the previous frame of each touch.
                Vector2 touchZeroPrevPos = touchZero.position - touchZero.deltaPosition;
                Vector2 touchOnePrevPos = touchOne.position - touchOne.deltaPosition;
   
                // Find the magnitude of the vector (the distance) between the touches in each frame.
                float prevTouchDeltaMag = (touchZeroPrevPos - touchOnePrevPos).magnitude;
                float touchDeltaMag = (touchZero.position - touchOne.position).magnitude;
   
                // Find the difference in the distances between each frame.
                float deltaMagnitudeDiff = prevTouchDeltaMag - touchDeltaMag;
   
                // ... change the canvas size based on the change in distance between the touches.
                canvas.scaleFactor -= deltaMagnitudeDiff * zoomSpeed;
   
                // Make sure the canvas size never drops below 0.1
                canvas.scaleFactor = Mathf.Max(canvas.scaleFactor, 0.1f);
            }
        }
    }
   

希望对您有所帮助!