From eb0731d3be9ba36336289a4319e73b6084c081a3 Mon Sep 17 00:00:00 2001
From: Richard Davey <rich@photonstorm.com>
Date: Tue, 24 Jan 2023 13:43:52 +0000
Subject: [PATCH] Added translated uv coords + scrollUV and scaleUV methods

---
 src/geom/mesh/Vertex.js | 76 +++++++++++++++++++++++++++++++++++++++--
 1 file changed, 74 insertions(+), 2 deletions(-)

diff --git a/src/geom/mesh/Vertex.js b/src/geom/mesh/Vertex.js
index a7ef68a36..147074ce7 100644
--- a/src/geom/mesh/Vertex.js
+++ b/src/geom/mesh/Vertex.js
@@ -165,11 +165,32 @@ var Vertex = new Class({
          * @since 3.50.0
          */
         this.ta = 0;
+
+        /**
+         * The translated uv u coordinate of this vertex.
+         *
+         * @name Phaser.Geom.Mesh.Vertex#tu
+         * @type {number}
+         * @since 3.60.0
+         */
+        this.tu = u;
+
+        /**
+         * The translated uv v coordinate of this vertex.
+         *
+         * @name Phaser.Geom.Mesh.Vertex#tv
+         * @type {number}
+         * @since 3.60.0
+         */
+        this.tv = v;
     },
 
     /**
      * Sets the U and V properties.
      *
+     * Also resets the translated uv properties, undoing any scale
+     * or shift they may have had.
+     *
      * @method Phaser.Geom.Mesh.Vertex#setUVs
      * @since 3.50.0
      *
@@ -183,6 +204,57 @@ var Vertex = new Class({
         this.u = u;
         this.v = v;
 
+        this.tu = u;
+        this.tv = v;
+
+        return this;
+    },
+
+    /**
+     * Translates the original UV positions by the given amounts.
+     *
+     * The original properties `Vertex.u` and `Vertex.v`
+     * remain unchanged, only the translated properties
+     * `Vertex.tu` and `Vertex.tv`, as used in rendering,
+     * are updated.
+     *
+     * @method Phaser.Geom.Mesh.Vertex#scrollUV
+     * @since 3.60.0
+     *
+     * @param {number} x - The amount to scroll the UV u coordinate by.
+     * @param {number} y - The amount to scroll the UV v coordinate by.
+     *
+     * @return {this} This Vertex.
+     */
+    scrollUV: function (x, y)
+    {
+        this.tu += x;
+        this.tv += y;
+
+        return this;
+    },
+
+    /**
+     * Scales the original UV values by the given amounts.
+     *
+     * The original properties `Vertex.u` and `Vertex.v`
+     * remain unchanged, only the translated properties
+     * `Vertex.tu` and `Vertex.tv`, as used in rendering,
+     * are updated.
+     *
+     * @method Phaser.Geom.Mesh.Vertex#scaleUV
+     * @since 3.60.0
+     *
+     * @param {number} x - The amount to scale the UV u coordinate by.
+     * @param {number} y - The amount to scale the UV v coordinate by.
+     *
+     * @return {this} This Vertex.
+     */
+    scaleUV: function (x, y)
+    {
+        this.tu = this.u * x;
+        this.tv = this.v * y;
+
         return this;
     },
 
@@ -322,8 +394,8 @@ var Vertex = new Class({
     {
         F32[++offset] = this.tx;
         F32[++offset] = this.ty;
-        F32[++offset] = this.u;
-        F32[++offset] = this.v;
+        F32[++offset] = this.tu;
+        F32[++offset] = this.tv;
         F32[++offset] = textureUnit;
         F32[++offset] = tintEffect;
         U32[++offset] = Utils.getTintAppendFloatAlpha(this.color, this.ta);