From 231af2df673f30904a8b939fbdb1eb4dbd7b28ef Mon Sep 17 00:00:00 2001
From: LarsBrubaker <larsbrubaker@gmail.com>
Date: Sat, 22 Dec 2018 07:53:26 -0800
Subject: [PATCH] Subtract and replace can handle multiple keep objects

Also fixes it being applied to an existing subtract and replace
---
 .../View3D/Actions/SubtractAndReplaceObject3D.cs                | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/MatterControlLib/PartPreviewWindow/View3D/Actions/SubtractAndReplaceObject3D.cs b/MatterControlLib/PartPreviewWindow/View3D/Actions/SubtractAndReplaceObject3D.cs
index 489e706b0..147639ab6 100644
--- a/MatterControlLib/PartPreviewWindow/View3D/Actions/SubtractAndReplaceObject3D.cs
+++ b/MatterControlLib/PartPreviewWindow/View3D/Actions/SubtractAndReplaceObject3D.cs
@@ -137,7 +137,7 @@ namespace MatterHackers.MatterControl.PartPreviewWindow.View3D
 								}
 								else // union into the current paint
 								{
-									paintMesh = BooleanProcessing.Do(keep.obj3D.Mesh, keep.matrix,
+									paintMesh = BooleanProcessing.Do(paintMesh, keep.matrix,
 										intersect, Matrix4X4.Identity, 0, reporter, amountPerOperation, percentCompleted, progressStatus, cancellationToken);
 								}