From b0309c970724e17a2ec2abe07f1a8a4f3d332c56 Mon Sep 17 00:00:00 2001
From: Ellpeck <megamaximal@gmail.com>
Date: Tue, 2 Jun 2020 16:15:41 +0200
Subject: [PATCH] added ScaleOrigin to RootElement

---
 MLEM.Ui/Elements/CustomDrawGroup.cs | 2 +-
 MLEM.Ui/UiSystem.cs                 | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/MLEM.Ui/Elements/CustomDrawGroup.cs b/MLEM.Ui/Elements/CustomDrawGroup.cs
index bf53125..0e56c35 100644
--- a/MLEM.Ui/Elements/CustomDrawGroup.cs
+++ b/MLEM.Ui/Elements/CustomDrawGroup.cs
@@ -71,7 +71,7 @@ namespace MLEM.Ui.Elements {
         /// <param name="scale">The scale to use</param>
         /// <param name="origin">The origin to use for scaling, or null to use this element's center point</param>
         public void ScaleOrigin(float scale, Vector2? origin = null) {
-            this.Transform = Matrix.CreateScale(scale, scale, 0) * Matrix.CreateTranslation(new Vector3((1 - scale) * (origin ?? this.DisplayArea.Center), 0));
+            this.Transform = Matrix.CreateScale(scale, scale, 1) * Matrix.CreateTranslation(new Vector3((1 - scale) * (origin ?? this.DisplayArea.Center), 0));
         }
 
         /// <summary>
diff --git a/MLEM.Ui/UiSystem.cs b/MLEM.Ui/UiSystem.cs
index 0de7170..0a4bbc7 100644
--- a/MLEM.Ui/UiSystem.cs
+++ b/MLEM.Ui/UiSystem.cs
@@ -442,5 +442,14 @@ namespace MLEM.Ui {
             this.System.Controls.SelectElement(this, element, autoNav);
         }
 
+        /// <summary>
+        /// Scales this root element's <see cref="Transform"/> matrix based on the given scale and origin.
+        /// </summary>
+        /// <param name="scale">The scale to use</param>
+        /// <param name="origin">The origin to use for scaling, or null to use this root's element's center point</param>
+        public void ScaleOrigin(float scale, Vector2? origin = null) {
+            this.Transform = Matrix.CreateScale(scale, scale, 1) * Matrix.CreateTranslation(new Vector3((1 - scale) * (origin ?? this.Element.DisplayArea.Center), 0));
+        }
+
     }
 }
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