Simulation: Add modifier to access simulation data

For now the "Simulation" modifier only exists for point cloud objects, because
we need this for the particle system. Right now, the modifier is doing nothing.

There is a new `DEG_add_simulation_relation` function that is used
by the modifier to make sure that the simulation is evaluated before
the modifier is executed.

Reviewers: brecht, sergey

Differential Revision: https://developer.blender.org/D7549

1 files changed, 2 insertions, 1 deletions

diff --git a/source/blender/depsgraph/intern/debug/deg_debug_relations_graphviz.cc b/source/blender/depsgraph/intern/debug/deg_debug_relations_graphviz.cc
index bde48affc28..dbe88ee92a8 100644
--- a/source/blender/depsgraph/intern/debug/deg_debug_relations_graphviz.cc
+++ b/source/blender/depsgraph/intern/debug/deg_debug_relations_graphviz.cc
@@ -439,7 +439,8 @@ static void deg_debug_graphviz_node(const DebugContext &ctx, const Node *node)
     case NodeType::SYNCHRONIZATION:
     case NodeType::AUDIO:
     case NodeType::ARMATURE:
-    case NodeType::GENERIC_DATABLOCK: {
+    case NodeType::GENERIC_DATABLOCK:
+    case NodeType::SIMULATION: {
       ComponentNode *comp_node = (ComponentNode *)node;
       if (!comp_node->operations.empty()) {
         deg_debug_graphviz_node_cluster_begin(ctx, node);