c# - 如何找到相机视野所包含的区域？

Question

鉴于相机的视角是一个金字塔形状，如何找到这个金字塔包含的区域？

Answer 1

这是一个使用相机视口(viewport)而不是屏幕的简单脚本。这是一种更通用的方法:

using UnityEngine;
using System.Collections.Generic;

public class MyCameraUtilityScript : MonoBehaviour
{
    public List<Vector3> GetCameraFrustrumCorners()
    {
        List<Vector3> corners = new List<Vector3>(8); // 8 corners

        Camera c = GetComponent<Camera>();

        // corners counterclockwise at near clip plane
        corners.Add(c.ViewportToWorldPoint(new Vector3(0.0f, 0.0f, c.nearClipPlane))); // bottom-left
        corners.Add(c.ViewportToWorldPoint(new Vector3(1.0f, 0.0f, c.nearClipPlane))); // bottom-right
        corners.Add(c.ViewportToWorldPoint(new Vector3(1.0f, 1.0f, c.nearClipPlane))); // top-right
        corners.Add(c.ViewportToWorldPoint(new Vector3(0.0f, 1.0f, c.nearClipPlane))); // top-left

        // corners counterclockwise at far clip plane
        corners.Add(c.ViewportToWorldPoint(new Vector3(0.0f, 0.0f, c.farClipPlane))); // bottom-left
        corners.Add(c.ViewportToWorldPoint(new Vector3(1.0f, 0.0f, c.farClipPlane))); // bottom-right
        corners.Add(c.ViewportToWorldPoint(new Vector3(1.0f, 1.0f, c.farClipPlane))); // top-right
        corners.Add(c.ViewportToWorldPoint(new Vector3(0.0f, 1.0f, c.farClipPlane))); // top-left

        return corners;
    }
}