Quad를 Camera의 Frustum 내에 맞추는 스크립트

FillQuadToScreen.cs

using UnityEngine;

public class FillQuadToScreen : MonoBehaviour
{
    [SerializeField] private Camera m_camera = null;
    [SerializeField] private float m_distance = 1f;

    private Transform m_transform = null;
    private Transform m_cameraTransform = null;

    private void Awake()
    {
        m_transform = this.transform;
        m_cameraTransform = m_camera.transform;
    }

    private void Update()
    {
        float pos = (m_camera.nearClipPlane + m_distance);

        m_transform.position = m_cameraTransform.position + m_cameraTransform.forward * pos;

        m_transform.LookAt(m_camera.transform);
        m_transform.Rotate(0, 180, 0);

        Vector3 dist = m_transform.position - m_camera.transform.position;

        float h = 2.0f * dist.magnitude * Mathf.Tan(m_camera.fieldOfView * 0.5f * Mathf.Deg2Rad);
        float w = h * (Screen.width / (float)Screen.height);

        m_transform.localScale = new Vector3(w, h, 1);
    }
}