From 33e5195ef2763d03ef344797ed0bc4ea59e490fb Mon Sep 17 00:00:00 2001
From: mob-sakai <sakai861104@gmail.com>
Date: Thu, 20 Dec 2018 20:17:27 +0900
Subject: [PATCH] close #20; Doesn't work with overlay canvas on 2018.3

---
 Scripts/SoftMask.cs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Scripts/SoftMask.cs b/Scripts/SoftMask.cs
index cf97a14..1ca4840 100644
--- a/Scripts/SoftMask.cs
+++ b/Scripts/SoftMask.cs
@@ -429,14 +429,17 @@ namespace Coffee.UIExtensions
 			_cb.ClearRenderTarget(false, true, s_ClearColors[_stencilDepth]);
 
 			// Set view and projection matrices.
-			var c = graphic.canvas;
+			var c = graphic.canvas.rootCanvas;
 			if (c && c.renderMode != RenderMode.ScreenSpaceOverlay && c.worldCamera)
 			{
 				_cb.SetViewProjectionMatrices(c.worldCamera.worldToCameraMatrix, c.worldCamera.projectionMatrix);
 			}
 			else
 			{
-				_cb.SetViewMatrix(Matrix4x4.TRS(new Vector3(-1, -1, 0), Quaternion.identity, new Vector3(2f / Screen.width, 2f / Screen.height, 1f)));
+				var pos = c.transform.localPosition;
+				var vm = Matrix4x4.TRS (-pos, Quaternion.identity, new Vector3 (1, 1, -1f));
+				var pm = Matrix4x4.TRS (new Vector3 (0, 0, -1), Quaternion.identity, new Vector3 (1 / pos.x, 1 / pos.y, -2 / 1000f));
+				_cb.SetViewProjectionMatrices (vm, pm);
 			}
 
 			// Draw soft masks.