From aafcbbc4f9c52cfe275fa8ddce4964f77e352014 Mon Sep 17 00:00:00 2001
From: Viktor Lidholt <viktorl@google.com>
Date: Thu, 3 Dec 2015 13:55:32 -0800
Subject: [PATCH] Fixes issue with physics debug drawing in sprites

---
 packages/flutter_sprites/lib/src/sprite_box.dart | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/packages/flutter_sprites/lib/src/sprite_box.dart b/packages/flutter_sprites/lib/src/sprite_box.dart
index d50299a9d73..4c2d3e37584 100644
--- a/packages/flutter_sprites/lib/src/sprite_box.dart
+++ b/packages/flutter_sprites/lib/src/sprite_box.dart
@@ -348,6 +348,9 @@ class SpriteBox extends RenderBox {
     _rootNode._visit(canvas, totalMatrix);
 
     // Draw physics debug
+    if (_physicsNodes == null)
+      _rebuildActionControllersAndPhysicsNodes();
+
     for (PhysicsWorld world in _physicsNodes) {
       if (world.drawDebug) {
         canvas.setMatrix(world._debugDrawTransform.storage);