Added catch of nullptr viewMatrix

Author: robertosfield

cmake/cppcheck-suppression-list.txt

@@ -208,6 +208,7 @@ shadowFunction:*/src/vsg/state/DescriptorImage.cpp
 shadowFunction:*/src/vsg/utils/FindDynamicObjects.cpp
 shadowFunction:*/src/vsg/utils/LoadPagedLOD.cpp
 shadowFunction:*/src/vsg/utils/PropagateDynamicObjects.cpp
+shadowFunction:*/src/vsg/app/ViewMatrix.cpp
 
 // suppress unhelpful warning of c casts
 cstyleCast:*/include/vsg/io/mem_stream.h

src/vsg/app/RecordTraversal.cpp

@@ -444,7 +444,15 @@ void RecordTraversal::apply(const CoordinateFrame& cf)
     Camera* camera = parentView ? parentView->camera : nullptr;
     ViewMatrix* viewMatrix = camera ? camera->viewMatrix : nullptr;
 
-    _state->modelviewMatrixStack.push(viewMatrix->transform(cf.origin));
+    if (viewMatrix)
+    {
+        _state->modelviewMatrixStack.push(viewMatrix->transform(cf.origin));
+    }
+    else
+    {
+        _state->modelviewMatrixStack.push(cf);
+    }
+
     _state->dirty = true;
 
     if (cf.subgraphRequiresLocalFrustum)