From 200cf7aacb95b2eaee0efa0aca5953f3d8d501ea Mon Sep 17 00:00:00 2001
From: SamGondelman <samuel_gondelman@alumni.brown.edu>
Date: Thu, 2 May 2019 14:31:40 -0700
Subject: [PATCH] try to fix transition crash

---
 libraries/render/src/render/Scene.cpp | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/libraries/render/src/render/Scene.cpp b/libraries/render/src/render/Scene.cpp
index 16d1d49d9f..4f6fe3e36a 100644
--- a/libraries/render/src/render/Scene.cpp
+++ b/libraries/render/src/render/Scene.cpp
@@ -392,6 +392,10 @@ void Scene::updateItems(const Transaction::Updates& transactions) {
 void Scene::transitionItems(const Transaction::TransitionAdds& transactions) {
     auto transitionStage = getStage<TransitionStage>(TransitionStage::getName());
 
+    if (!transitionStage) {
+        return;
+    }
+
     for (auto& add : transactions) {
         auto itemId = std::get<0>(add);
         // Access the true item
@@ -433,6 +437,10 @@ void Scene::reApplyTransitions(const Transaction::TransitionReApplies& transacti
 void Scene::queryTransitionItems(const Transaction::TransitionQueries& transactions) {
     auto transitionStage = getStage<TransitionStage>(TransitionStage::getName());
 
+    if (!transitionStage) {
+        return;
+    }
+
     for (auto& query : transactions) {
         auto itemId = std::get<0>(query);
         // Access the true item
@@ -553,11 +561,14 @@ void Scene::setItemTransition(ItemID itemId, Index transitionId) {
 }
 
 void Scene::resetItemTransition(ItemID itemId) {
+    auto transitionStage = getStage<TransitionStage>(TransitionStage::getName());
+    if (!transitionStage) {
+        return;
+    }
+
     auto& item = _items[itemId];
     TransitionStage::Index transitionId = item.getTransitionId();
     if (!render::TransitionStage::isIndexInvalid(transitionId)) {
-        auto transitionStage = getStage<TransitionStage>(TransitionStage::getName());
-
         auto finishedOperators = _transitionFinishedOperatorMap[transitionId];
         for (auto finishedOperator : finishedOperators) {
             if (finishedOperator) {