@ VIEWER_PATH_ELEM_TYPE_GROUP_NODE
@ VIEWER_PATH_ELEM_TYPE_SIMULATION_ZONE
@ VIEWER_PATH_ELEM_TYPE_FOREACH_GEOMETRY_ELEMENT_ZONE
@ VIEWER_PATH_ELEM_TYPE_VIEWER_NODE
@ VIEWER_PATH_ELEM_TYPE_REPEAT_ZONE
@ VIEWER_PATH_ELEM_TYPE_MODIFIER
@ VIEWER_PATH_ELEM_TYPE_ID
int repeat_output_node_id
int32_t sim_output_node_id
struct ViewerPathElem * prev
struct ViewerPathElem * next