Simulations: Add simulation node tree type

This implements a new builtin node tree type called `SimulationNodeTree`.
It is not yet embedded in the `Simulation` data block.

The node tree will initially be used for the new particle nodes system.

When the cmake option `WITH_NEW_SIMULATION_TYPE` is enabled, a new
`Simulation Editor` is shown in the editors menu (which is just a node editor).

This patch does not add entries to the Add Node menu, so it is empty.

Reviewers: brecht

Differential Revision: https://developer.blender.org/D7287

1 files changed, 9 insertions, 0 deletions

diff --git a/source/blender/editors/space_node/drawnode.c b/source/blender/editors/space_node/drawnode.c
index e5ca2efb26f..01fbafe6176 100644
--- a/source/blender/editors/space_node/drawnode.c
+++ b/source/blender/editors/space_node/drawnode.c
@@ -69,6 +69,7 @@
 
 #include "NOD_composite.h"
 #include "NOD_shader.h"
+#include "NOD_simulation.h"
 #include "NOD_texture.h"
 #include "node_intern.h" /* own include */
 
@@ -3122,6 +3123,12 @@ static void node_texture_set_butfunc(bNodeType *ntype)
   }
 }
 
+/* ****************** BUTTON CALLBACKS FOR SIMULATION NODES ***************** */
+
+static void node_simulation_set_butfunc(bNodeType *UNUSED(ntype))
+{
+}
+
 /* ****** init draw callbacks for all tree types, only called in usiblender.c, once ************ */
 
 static void node_property_update_default(Main *bmain, Scene *UNUSED(scene), PointerRNA *ptr)
@@ -3230,6 +3237,7 @@ void ED_node_init_butfuncs(void)
     node_composit_set_butfunc(ntype);
     node_shader_set_butfunc(ntype);
     node_texture_set_butfunc(ntype);
+    node_simulation_set_butfunc(ntype);
 
     /* define update callbacks for socket properties */
     node_template_properties_update(ntype);
@@ -3240,6 +3248,7 @@ void ED_node_init_butfuncs(void)
   ntreeType_Composite->ui_icon = ICON_NODE_COMPOSITING;
   ntreeType_Shader->ui_icon = ICON_NODE_MATERIAL;
   ntreeType_Texture->ui_icon = ICON_NODE_TEXTURE;
+  ntreeType_Simulation->ui_icon = ICON_PHYSICS; /* TODO: Use correct icon. */
 }
 
 void ED_init_custom_node_type(bNodeType *ntype)