diff --git a/src/core/math/GroupD8.js b/src/core/math/GroupD8.js
index 50c2f31..e6a09e7 100644
--- a/src/core/math/GroupD8.js
+++ b/src/core/math/GroupD8.js
@@ -111,13 +111,14 @@
     rotate180: (rotation) => rotation ^ 4,
 
     /**
-     * I dont know why sometimes width and heights needs to be swapped. We'll fix it later.
+     * Direction of main vector can be horizontal, vertical or diagonal.
+     * Some objects work with vertical directions different.
      *
      * @memberof PIXI.GroupD8
      * @param {number} rotation - The number to check.
-     * @returns {boolean} Whether or not the width/height should be swapped.
+     * @returns {boolean} Whether or not the direction is vertical
      */
-    isSwapWidthHeight: (rotation) => (rotation & 3) === 2,
+    isVertical: (rotation) => (rotation & 3) === 2,
 
     /**
      * @memberof PIXI.GroupD8

diff --git a/src/core/math/GroupD8.js b/src/core/math/GroupD8.js
index 50c2f31..e6a09e7 100644
--- a/src/core/math/GroupD8.js
+++ b/src/core/math/GroupD8.js
@@ -111,13 +111,14 @@
     rotate180: (rotation) => rotation ^ 4,
 
     /**
-     * I dont know why sometimes width and heights needs to be swapped. We'll fix it later.
+     * Direction of main vector can be horizontal, vertical or diagonal.
+     * Some objects work with vertical directions different.
      *
      * @memberof PIXI.GroupD8
      * @param {number} rotation - The number to check.
-     * @returns {boolean} Whether or not the width/height should be swapped.
+     * @returns {boolean} Whether or not the direction is vertical
      */
-    isSwapWidthHeight: (rotation) => (rotation & 3) === 2,
+    isVertical: (rotation) => (rotation & 3) === 2,
 
     /**
      * @memberof PIXI.GroupD8
diff --git a/src/deprecation.js b/src/deprecation.js
index d1b689e..209910a 100644
--- a/src/deprecation.js
+++ b/src/deprecation.js
@@ -601,6 +601,21 @@
         return this.generateCanvasTexture(scaleMode, resolution);
     };
 
+    /**
+     * @method
+     * @name PIXI.GroupD8.isSwapWidthHeight
+     * @see PIXI.GroupD8.isVertical
+     * @param {number} rotation - The number to check.
+     * @returns {boolean} Whether or not the direction is vertical
+     * @deprecated since version 4.6.0
+     */
+    core.GroupD8.isSwapWidthHeight = function isSwapWidthHeight(rotation)
+    {
+        warn('GroupD8.isSwapWidthHeight was renamed to GroupD8.isVertical');
+
+        return core.GroupD8.isVertical(rotation);
+    };
+
     core.RenderTexture.prototype.render = function render(displayObject, matrix, clear, updateTransform)
     {
         this.legacyRenderer.render(displayObject, this, clear, matrix, !updateTransform);