Initial commit

Assets/Procedural Worlds/Gaia/Scripts/Water System/PW_Camera_Refraction.cs

@@ -0,0 +1,107 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.Rendering;
+
+#if UNITY_EDITOR
+using UnityEditor;
+#endif
+
+[ExecuteInEditMode]
+public class PW_Camera_Refraction : MonoBehaviour
+{
+	private CameraEvent 	_cameraEvent 		= CameraEvent.AfterForwardOpaque;
+	private CommandBuffer 	_cbuf;
+	private string          _cbufName 			= "Echo_Refaction";
+	private int             _grabID;
+	private int             _screenWidth 	= 0;
+	private int             _screenHeight 	= 0;
+	private Camera          _camera;
+
+	[System.Serializable]
+	public enum PW_RENDER_SIZE
+	{
+		FULL 	= -1,
+		HALF 	= -2,
+		QUARTER = -3
+	};
+
+	 public PW_RENDER_SIZE renderSize = PW_RENDER_SIZE.HALF;
+
+	//-------------------------------------------------------------------------
+	private void CommandBufferDestroy( Camera i_cam )
+	{
+		if ( i_cam == null ) 
+			return;
+
+        if ( _cbuf != null) 
+		{
+            i_cam.RemoveCommandBuffer ( _cameraEvent, _cbuf );
+            _cbuf.Clear();
+            _cbuf.Dispose();
+            _cbuf = null;
+        }
+
+        CommandBuffer[] commandBuffers = i_cam.GetCommandBuffers ( _cameraEvent );
+
+        foreach ( CommandBuffer cbuf in commandBuffers ) 
+		{
+            if ( cbuf.name == _cbufName ) 
+			{
+                i_cam.RemoveCommandBuffer ( _cameraEvent, cbuf );
+                cbuf.Clear();
+                cbuf.Dispose();
+            }
+        }
+	}
+
+	//-------------------------------------------------------------------------
+	private void CommandBufferCreate()
+	{
+		CommandBufferDestroy(_camera);
+
+		_cbuf = new CommandBuffer();
+        _cbuf.name = _cbufName;
+        _cbuf.Clear();
+
+        _cbuf.GetTemporaryRT ( _grabID, (int)renderSize, (int)renderSize, 0, FilterMode.Bilinear );
+        _cbuf.Blit ( BuiltinRenderTextureType.CurrentActive, _grabID );
+        _cbuf.SetGlobalTexture ( "_CameraOpaqueTexture", _grabID );
+
+		_camera.AddCommandBuffer ( _cameraEvent, _cbuf );
+	}
+
+	//=========================================================================
+	void OnPreRender() 
+	{
+        if ( _screenHeight != _camera.pixelHeight || _screenWidth != _camera.pixelWidth) 
+		{
+			_screenWidth 	= _camera.pixelWidth;
+			_screenHeight 	= _camera.pixelHeight;
+
+            CommandBufferCreate();
+        }
+    }
+
+	//=========================================================================
+	void OnDisable()
+	{
+		CommandBufferDestroy(_camera);
+	}
+
+	//=========================================================================
+    void OnEnable()
+    {
+		_camera = GetComponent<Camera>();
+
+		if ( _camera == null ) 
+			_camera 	= Camera.main;
+
+		_screenWidth 	= _camera.pixelWidth;
+		_screenHeight 	= _camera.pixelHeight;
+
+		CommandBufferCreate();
+
+		_grabID 		= Shader.PropertyToID ( "_EchoTemp" );
+    }
+}