Library/PackageCache/com.unity.render-pipelines.high-definition@4.10.0-preview/Runtime/Core/Camera/CameraSwitcher.cs

   1 using UnityEngine;
   2
   3 namespace UnityEngine.Experimental.Rendering
   4 {
   5     public class CameraSwitcher : MonoBehaviour
   6     {
   7         public Camera[] m_Cameras;
   8
   9         private int m_CurrentCameraIndex = -1;
  10         private Camera m_OriginalCamera = null;
  11         private Vector3 m_OriginalCameraPosition;
  12         private Quaternion m_OriginalCameraRotation;
  13         private Camera m_CurrentCamera = null;
  14
  15         GUIContent[]    m_CameraNames = null;
  16         int[]           m_CameraIndices = null;
  17
  18         DebugUI.EnumField m_DebugEntry;
  19
  20         //saved enum fields for when repainting
  21         int m_DebugEntryEnumIndex;
  22
  23         void OnEnable()
  24         {
  25             m_OriginalCamera = GetComponent<Camera>();
  26             m_CurrentCamera = m_OriginalCamera;
  27
  28             if (m_OriginalCamera == null)
  29             {
  30                 Debug.LogError("Camera Switcher needs a Camera component attached");
  31                 return;
  32             }
  33
  34             m_CurrentCameraIndex = GetCameraCount() - 1;
  35
  36             m_CameraNames = new GUIContent[GetCameraCount()];
  37             m_CameraIndices = new int[GetCameraCount()];
  38
  39             for (int i = 0; i < m_Cameras.Length; ++i)
  40             {
  41                 Camera cam = m_Cameras[i];
  42                 if (cam != null)
  43                 {
  44                     m_CameraNames[i] = new GUIContent(cam.name);
  45                 }
  46                 else
  47                 {
  48                     m_CameraNames[i] = new GUIContent("null");
  49                 }
  50                 m_CameraIndices[i] = i;
  51             }
  52
  53             m_CameraNames[GetCameraCount() - 1] = new GUIContent("Original Camera");
  54             m_CameraIndices[GetCameraCount() - 1] = GetCameraCount() - 1;
  55
  56             m_DebugEntry = new DebugUI.EnumField { displayName = "Camera Switcher", getter = () => m_CurrentCameraIndex, setter = value => SetCameraIndex(value), enumNames = m_CameraNames, enumValues = m_CameraIndices, getIndex = () => m_DebugEntryEnumIndex, setIndex = value => m_DebugEntryEnumIndex = value };
  57             var panel = DebugManager.instance.GetPanel("Camera", true);
  58             panel.children.Add(m_DebugEntry);
  59         }
  60
  61         void OnDisable()
  62         {
  63             if (m_DebugEntry != null && m_DebugEntry.panel != null)
  64             {
  65                 var panel = m_DebugEntry.panel;
  66                 panel.children.Remove(m_DebugEntry);
  67             }
  68         }
  69
  70         int GetCameraCount()
  71         {
  72             return m_Cameras.Length + 1; // We need +1 for handling the original camera.
  73         }
  74
  75         Camera GetNextCamera()
  76         {
  77             if (m_CurrentCameraIndex == m_Cameras.Length)
  78                 return m_OriginalCamera;
  79             else
  80                 return m_Cameras[m_CurrentCameraIndex];
  81         }
  82
  83         void SetCameraIndex(int index)
  84         {
  85             if (index > 0 || index < GetCameraCount())
  86             {
  87                 m_CurrentCameraIndex = index;
  88
  89                 if (m_CurrentCamera == m_OriginalCamera)
  90                 {
  91                     m_OriginalCameraPosition = m_OriginalCamera.transform.position;
  92                     m_OriginalCameraRotation = m_OriginalCamera.transform.rotation;
  93                 }
  94
  95                 m_CurrentCamera = GetNextCamera();
  96
  97                 if (m_CurrentCamera != null)
  98                 {
  99                     // If we witch back to the original camera, put back the transform in it.
 100                     if (m_CurrentCamera == m_OriginalCamera)
 101                     {
 102                         m_OriginalCamera.transform.position = m_OriginalCameraPosition;
 103                         m_OriginalCamera.transform.rotation = m_OriginalCameraRotation;
 104                     }
 105
 106                     transform.position = m_CurrentCamera.transform.position;
 107                     transform.rotation = m_CurrentCamera.transform.rotation;
 108                 }
 109             }
 110         }
 111     }
 112 }