Reverting doc rename

doc/examples/sprite_batch/lib/main.dart

@@ -0,0 +1,60 @@
+import 'dart:math';
+
+import 'package:flame/flame.dart';
+import 'package:flutter/material.dart';
+import 'package:flame/game.dart';
+import 'package:flame/sprite_batch.dart';
+import 'package:flame/components/sprite_batch_component.dart';
+
+void main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+  final Size size = await Flame.util.initialDimensions();
+  final game = MyGame(size);
+  runApp(game.widget);
+}
+
+class MyGame extends BaseGame {
+  SpriteBatch spriteBatch;
+
+  MyGame(Size screenSize) {
+    size = screenSize;
+
+    initData();
+  }
+
+  void initData() async {
+    spriteBatch = await SpriteBatch.withAsset('boom3.png');
+
+    spriteBatch.add(
+      rect: const Rect.fromLTWH(128 * 4.0, 128 * 4.0, 64, 128),
+      offset: const Offset(200, 200),
+      color: Colors.greenAccent,
+      scale: 2,
+      rotation: pi / 9.0,
+      anchor: const Offset(64, 64),
+    );
+
+    spriteBatch.addTransform(
+      rect: const Rect.fromLTWH(128 * 4.0, 128 * 4.0, 64, 128),
+      color: Colors.redAccent,
+    );
+
+    const NUM = 100;
+    final r = Random();
+    for (int i = 0; i < NUM; ++i) {
+      final sx = r.nextInt(8) * 128.0;
+      final sy = r.nextInt(8) * 128.0;
+      final x = r.nextInt(size.width.toInt()).toDouble();
+      final y = r.nextInt(size.height ~/ 2).toDouble() + size.height / 2.0;
+      spriteBatch.add(
+        rect: Rect.fromLTWH(sx, sy, 128, 128),
+        offset: Offset(x - 64, y - 64),
+      );
+    }
+
+    add(SpriteBatchComponent.fromSpriteBatch(
+      spriteBatch,
+      blendMode: BlendMode.srcOver,
+    ));
+  }
+}