From efde7780a025f90c8df08659673f6f8d626b1b16 Mon Sep 17 00:00:00 2001
From: Mark Mankarious <mz.mankarious@gmail.com>
Date: Mon, 30 Oct 2023 22:31:17 +0000
Subject: [PATCH] feat: applies animation on zoom and scroll

---
 src/components/Grid/Grid.tsx             | 41 +++++++++++++++++-------
 src/components/SceneLayer/SceneLayer.tsx | 20 +++++++++---
 2 files changed, 45 insertions(+), 16 deletions(-)

diff --git a/src/components/Grid/Grid.tsx b/src/components/Grid/Grid.tsx
index f81687b..8d052f1 100644
--- a/src/components/Grid/Grid.tsx
+++ b/src/components/Grid/Grid.tsx
@@ -1,20 +1,42 @@
-import React, { useMemo } from 'react';
+import React, { useEffect, useRef, useState } from 'react';
 import { Box } from '@mui/material';
+import gsap from 'gsap';
+import { Size } from 'src/types';
 import gridTileSvg from 'src/assets/grid-tile-bg.svg';
 import { useUiStateStore } from 'src/stores/uiStateStore';
 import { PROJECTED_TILE_SIZE } from 'src/config';
 import { SizeUtils } from 'src/utils/SizeUtils';
 
 export const Grid = () => {
+  const elementRef = useRef<HTMLDivElement>(null);
+  const [isFirstRender, setIsFirstRender] = useState(true);
   const scroll = useUiStateStore((state) => {
     return state.scroll;
   });
   const zoom = useUiStateStore((state) => {
     return state.zoom;
   });
-  const projectedTileSize = useMemo(() => {
-    return SizeUtils.multiply(PROJECTED_TILE_SIZE, zoom);
-  }, [zoom]);
+
+  useEffect(() => {
+    if (!elementRef.current) return;
+
+    const projectedTileSize = SizeUtils.multiply(PROJECTED_TILE_SIZE, zoom);
+    const elSize = elementRef.current.getBoundingClientRect();
+    const backgroundPosition: Size = {
+      width: elSize.width / 2 + scroll.position.x + projectedTileSize.width / 2,
+      height: elSize.height / 2 + scroll.position.y
+    };
+
+    gsap.to(elementRef.current, {
+      duration: isFirstRender ? 0 : 0.25,
+      backgroundSize: `${projectedTileSize.width}px`,
+      backgroundPosition: `${backgroundPosition.width}px ${backgroundPosition.height}px`
+    });
+
+    if (isFirstRender) {
+      setIsFirstRender(false);
+    }
+  }, [scroll, zoom, isFirstRender]);
 
   return (
     <Box
@@ -29,17 +51,12 @@ export const Grid = () => {
       }}
     >
       <Box
+        ref={elementRef}
         sx={{
           position: 'absolute',
           width: '100%',
-          height: '100%'
-        }}
-        style={{
-          background: `repeat url("${gridTileSvg}")`,
-          backgroundSize: `${projectedTileSize.width}px`,
-          backgroundPosition: `calc(50% + ${
-            scroll.position.x % projectedTileSize.width
-          }px) calc(50% + ${scroll.position.y % projectedTileSize.height}px)`
+          height: '100%',
+          background: `repeat url("${gridTileSvg}")`
         }}
       />
     </Box>
diff --git a/src/components/SceneLayer/SceneLayer.tsx b/src/components/SceneLayer/SceneLayer.tsx
index 1c05f9d..86f3a09 100644
--- a/src/components/SceneLayer/SceneLayer.tsx
+++ b/src/components/SceneLayer/SceneLayer.tsx
@@ -1,4 +1,5 @@
-import React from 'react';
+import React, { useRef, useEffect } from 'react';
+import gsap from 'gsap';
 import { Box, SxProps } from '@mui/material';
 import { useUiStateStore } from 'src/stores/uiStateStore';
 
@@ -9,6 +10,8 @@ interface Props {
 }
 
 export const SceneLayer = ({ children, order = 0, sx }: Props) => {
+  const elementRef = useRef<HTMLDivElement>(null);
+
   const scroll = useUiStateStore((state) => {
     return state.scroll;
   });
@@ -16,8 +19,20 @@ export const SceneLayer = ({ children, order = 0, sx }: Props) => {
     return state.zoom;
   });
 
+  useEffect(() => {
+    if (!elementRef.current) return;
+
+    gsap.to(elementRef.current, {
+      duration: 0.25,
+      translateX: scroll.position.x,
+      translateY: scroll.position.y,
+      scale: zoom
+    });
+  }, [zoom, scroll]);
+
   return (
     <Box
+      ref={elementRef}
       sx={{
         position: 'absolute',
         zIndex: order,
@@ -28,9 +43,6 @@ export const SceneLayer = ({ children, order = 0, sx }: Props) => {
         userSelect: 'none',
         ...sx
       }}
-      style={{
-        transform: `translate(${scroll.position.x}px, ${scroll.position.y}px) scale(${zoom})`
-      }}
     >
       {children}
     </Box>