From 5c0d6780765545dbb7a2273eae2da7a979519b2e Mon Sep 17 00:00:00 2001
From: Recrown <yunyangdeng@gmail.com>
Date: Fri, 22 Feb 2019 02:17:50 -0600
Subject: [PATCH] rotation functioning in rectangle renderer.

---
 CameraTest/CameraTest.cs                       |  6 ++++--
 RecrownedAthenaeum/Render/RectangleRenderer.cs | 12 ++++++------
 2 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/CameraTest/CameraTest.cs b/CameraTest/CameraTest.cs
index 7c47999..defb9ae 100644
--- a/CameraTest/CameraTest.cs
+++ b/CameraTest/CameraTest.cs
@@ -99,20 +99,22 @@ namespace CameraTest
 
             base.Update(gameTime);
         }
-
+        float angleDeg = 0;
         /// <summary>
         /// This is called when the game should draw itself.
         /// </summary>
         /// <param name="gameTime">Provides a snapshot of timing values.</param>
         protected override void Draw(GameTime gameTime)
         {
+            angleDeg++;
+            if (angleDeg > 360) angleDeg = 0;
             GraphicsDevice.Clear(Color.Black);
             rr.Begin(true);
             rr.Draw(25, 25, 70, 70, Color.Purple);
             rr.End();
 
             rr.Begin(false);
-            rr.Draw(75, 75, 70, 70, Color.Green);
+            rr.Draw(75, 75, 70, 70, Color.Green, MathHelper.ToRadians(angleDeg));
             rr.End();
             base.Draw(gameTime);
         }
diff --git a/RecrownedAthenaeum/Render/RectangleRenderer.cs b/RecrownedAthenaeum/Render/RectangleRenderer.cs
index c85de92..716f021 100644
--- a/RecrownedAthenaeum/Render/RectangleRenderer.cs
+++ b/RecrownedAthenaeum/Render/RectangleRenderer.cs
@@ -75,22 +75,22 @@ namespace RecrownedAthenaeum.Render
         /// <param name="height">Height of rectangle.</param>
         /// <param name="color">Color of all vertices of this rectangle.</param>
         /// <param name="rotation">Rotation of rectangle. Default is 0 radians.</param>
-        /// <param name="filled">If this rectangle should be filled.</param>
         public void Draw(int x, int y, int width, int height, Color color, float rotation = 0)
         {
             primitiveBatch.primitiveCount = filled ? 3 : 4;
             Vector2[] corners = new Vector2[4];
-            corners[0] = new Vector2(x, y);
-            corners[1] = new Vector2(x + width, y);
-            corners[2] = new Vector2(x + width, y + height);
-            corners[3] = new Vector2(x, y + height);
+            corners[1] = new Vector2 (width, 0);
+            corners[2] = new Vector2(width, height);
+            corners[3] = new Vector2(0, height);
 
             if (rotation != 0)
             {
                 Matrix rotMat = Matrix.CreateRotationZ(rotation);
                 for (int i = 0; i < corners.Length; i++)
                 {
-                    Vector2.Transform(corners[i], rotMat);
+                    corners[i] = Vector2.Transform(corners[i], rotMat);
+                    corners[i].X += x;
+                    corners[i].Y += y;
                 }
             }