c# - 如何让Unity3D Camera聚焦在一个区域？

Question

在我的 Unity3D 项目中，我有一个动态创建的板(使用 c#)并位于屏幕上，如下所示:

0 < x < 12
0 < z < 12
y = -1

如何让摄像头聚焦在电路板上，并针对不同的屏幕分辨率和不同的平台使其居中？

Answer 1

这是一个例子:

    using UnityEngine;
using System.Collections;

/**
 * This class attempts to force VERT- Field of view scaling.
 * By default, Unity uses the HOR+ technique.
 * 
 * http://en.wikipedia.org/wiki/Field_of_view_in_video_games#Scaling_methods
 */

[ExecuteInEditMode]
[RequireComponent (typeof(Camera))]
public class VertMinusCameraFOV : MonoBehaviour {

    public float designTimeVerticalFieldOfView = 60;
    public int designTimeWidth = 1280; // default screen width
    public int designTimeHeight = 720; // default screen height

    private float hFOVInRads;

    private int prevWidth;
    private int prevHeight;

    void Start () {

        prevWidth = designTimeWidth;
        prevHeight = designTimeHeight;

        float aspectRatio = (float) designTimeWidth / (float) designTimeHeight;
        float vFOVInRads = designTimeVerticalFieldOfView * Mathf.Deg2Rad;
        hFOVInRads = 2f * Mathf.Atan( Mathf.Tan(vFOVInRads/2f) * aspectRatio);

    }

    void Update () {

        if (Screen.width != prevWidth || Screen.height != prevHeight) { // capture screen ratio changes

            float aspectRatio = (float) Screen.width / (float) Screen.height;

            float vFOVInRads = 2f * Mathf.Atan( Mathf.Tan(hFOVInRads/2f) / aspectRatio );

            Debug.Log("Screen resolution change. Recomputing aspect ratio (" + aspectRatio + ") and field of view (" + vFOVInRads*Mathf.Rad2Deg + ")");

            foreach (Camera cam in GameObject.FindObjectsOfType(typeof(Camera))) {
                cam.fieldOfView = vFOVInRads * Mathf.Rad2Deg;
            }
        }

    }

}