From 2ead7c6c6be50f4a022d791885205ff4ae32b12f Mon Sep 17 00:00:00 2001
From: Ellpeck <megamaximal@gmail.com>
Date: Wed, 7 Aug 2019 16:32:19 +0200
Subject: [PATCH] border constraints as well as some other useful goodies

---
 MLEM/Cameras/Camera.cs | 26 +++++++++++++++++++++-----
 MLEM/MLEM.csproj       |  2 +-
 2 files changed, 22 insertions(+), 6 deletions(-)

diff --git a/MLEM/Cameras/Camera.cs b/MLEM/Cameras/Camera.cs
index ff62c70..26c472a 100644
--- a/MLEM/Cameras/Camera.cs
+++ b/MLEM/Cameras/Camera.cs
@@ -15,8 +15,16 @@ namespace MLEM.Cameras {
                 return Matrix.CreateScale(this.Scale, this.Scale, 1) * Matrix.CreateTranslation(new Vector3(pos, 0));
             }
         }
-        public Vector2 LookingPosition => this.Position + new Vector2(this.Viewport.Width / 2, this.Viewport.Height / 2) / this.Scale;
+        public Vector2 Max {
+            get => this.Position + this.ScaledViewport;
+            set => this.Position = value - this.ScaledViewport;
+        }
+        public Vector2 LookingPosition {
+            get => this.Position + this.ScaledViewport / 2;
+            set => this.Position = value - this.ScaledViewport / 2;
+        }
         public Viewport Viewport => this.graphicsDevice.Viewport;
+        public Vector2 ScaledViewport => new Vector2(this.Viewport.Width, this.Viewport.Height) / this.Scale;
 
         private readonly bool roundPosition;
         private readonly GraphicsDevice graphicsDevice;
@@ -26,10 +34,6 @@ namespace MLEM.Cameras {
             this.roundPosition = roundPosition;
         }
 
-        public void LookAt(Vector2 worldPos) {
-            this.Position = worldPos - new Vector2(this.Viewport.Width / 2, this.Viewport.Height / 2) / this.Scale;
-        }
-
         public Vector2 ToWorldPos(Vector2 pos) {
             return Vector2.Transform(pos, Matrix.Invert(this.ViewMatrix));
         }
@@ -42,5 +46,17 @@ namespace MLEM.Cameras {
             return (this.ToWorldPos(Vector2.Zero), this.ToWorldPos(new Vector2(this.Viewport.Width, this.Viewport.Height)));
         }
 
+        public void ConstrainWorldBounds(Vector2 min, Vector2 max) {
+            if (this.Position.X < min.X)
+                this.Position.X = min.X;
+            if (this.Position.Y < min.Y)
+                this.Position.Y = min.Y;
+
+            if (this.Max.X > max.X)
+                this.Max = new Vector2(max.X, this.Max.Y);
+            if (this.Max.Y > max.Y)
+                this.Max = new Vector2(this.Max.X, max.Y);
+        }
+
     }
 }
\ No newline at end of file
diff --git a/MLEM/MLEM.csproj b/MLEM/MLEM.csproj
index d3d25b9..88b82de 100644
--- a/MLEM/MLEM.csproj
+++ b/MLEM/MLEM.csproj
@@ -10,7 +10,7 @@
         <PackageProjectUrl>https://github.com/Ellpeck/MLEM</PackageProjectUrl>
         <RepositoryUrl>https://github.com/Ellpeck/MLEM</RepositoryUrl>
         <PackageLicenseUrl>https://github.com/Ellpeck/MLEM/blob/master/LICENSE</PackageLicenseUrl>
-        <Version>1.0.9</Version>
+        <Version>1.0.10</Version>
     </PropertyGroup>
 
     <ItemGroup>