Updated scroll factor docs to clarify impact on physics bodies phaserjs#3810

Author: photonstorm

CHANGELOG.md

@@ -190,7 +190,7 @@ Setting the `resolution` property in the Game Config to a value other than 1 wou
 
 My thanks to the following for helping with the Phaser 3 Examples, Docs and TypeScript definitions, either by reporting errors, fixing them or helping author the docs:
 
-@SBCGames @rgk @rook2pawn @robbintt @bguyl @halilcakarr @PhaserEditor2D @Edwin222 @tfelix @Yudikubota @hexus @guzmonne @ampled @thanh-taro @dcbriccetti @Dreaded-Gnu @padme-amidala @rootasjey @ampled @thejonanshow @polarstoat
+@SBCGames @rgk @rook2pawn @robbintt @bguyl @halilcakarr @PhaserEditor2D @Edwin222 @tfelix @Yudikubota @hexus @guzmonne @ampled @thanh-taro @dcbriccetti @Dreaded-Gnu @padme-amidala @rootasjey @ampled @thejonanshow @polarstoat @jdjoshuadavison
 
 Thanks to @khaleb85 for fixing the super-annoying lag on the API Docs pages when it hung the browser while indexing the search field.
 

src/gameobjects/components/ScrollFactor.js

@@ -24,6 +24,11 @@ var ScrollFactor = {
      * A value of 1 means it will move exactly in sync with a camera.
      * A value of 0 means it will not move at all, even if the camera moves.
      * Other values control the degree to which the camera movement is mapped to this Game Object.
+     * 
+     * Please be aware that scroll factor values other than 1 are not taken in to consideration when
+     * calculating physics collisions. Bodies always collide based on their world position, but changing
+     * the scroll factor is a visual adjustment to where the textures are rendered, which can offset
+     * them from physics bodies if not accounted for in your code.
      *
      * @name Phaser.GameObjects.Components.ScrollFactor#scrollFactorX
      * @type {number}
@@ -43,6 +48,11 @@ var ScrollFactor = {
      * A value of 1 means it will move exactly in sync with a camera.
      * A value of 0 means it will not move at all, even if the camera moves.
      * Other values control the degree to which the camera movement is mapped to this Game Object.
+     * 
+     * Please be aware that scroll factor values other than 1 are not taken in to consideration when
+     * calculating physics collisions. Bodies always collide based on their world position, but changing
+     * the scroll factor is a visual adjustment to where the textures are rendered, which can offset
+     * them from physics bodies if not accounted for in your code.
      *
      * @name Phaser.GameObjects.Components.ScrollFactor#scrollFactorY
      * @type {number}
@@ -62,6 +72,11 @@ var ScrollFactor = {
      * A value of 1 means it will move exactly in sync with a camera.
      * A value of 0 means it will not move at all, even if the camera moves.
      * Other values control the degree to which the camera movement is mapped to this Game Object.
+     * 
+     * Please be aware that scroll factor values other than 1 are not taken in to consideration when
+     * calculating physics collisions. Bodies always collide based on their world position, but changing
+     * the scroll factor is a visual adjustment to where the textures are rendered, which can offset
+     * them from physics bodies if not accounted for in your code.
      *
      * @method Phaser.GameObjects.Components.ScrollFactor#setScrollFactor
      * @since 3.0.0