Simulations: UI for core particle nodes

This commit adds the initial set of particles nodes. These are fairly
low level and are expected to be put into groups that we ship with Blender.

See D7384 for a description of the individual nodes.

Reviewers: brecht

Differential Revision: https://developer.blender.org/D7384

20 files changed, 713 insertions, 1 deletions

diff --git a/source/blender/blenkernel/BKE_node.h b/source/blender/blenkernel/BKE_node.h
index 9d7caeb845f..38bf3d828f7 100644
--- a/source/blender/blenkernel/BKE_node.h
+++ b/source/blender/blenkernel/BKE_node.h
@@ -1283,6 +1283,25 @@ int ntreeTexExecTree(struct bNodeTree *ntree,
                      struct MTex *mtex);
 /** \} */
 
+/* -------------------------------------------------------------------- */
+/** \name Simulation Nodes
+ * \{ */
+
+#define SIM_NODE_PARTICLE_SIMULATION 1000
+#define SIM_NODE_FORCE 1001
+#define SIM_NODE_SET_PARTICLE_ATTRIBUTE 1002
+#define SIM_NODE_PARTICLE_BIRTH_EVENT 1003
+#define SIM_NODE_PARTICLE_TIME_STEP_EVENT 1004
+#define SIM_NODE_EXECUTE_CONDITION 1005
+#define SIM_NODE_MULTI_EXECUTE 1006
+#define SIM_NODE_PARTICLE_MESH_EMITTER 1007
+#define SIM_NODE_PARTICLE_MESH_COLLISION_EVENT 1008
+#define SIM_NODE_EMIT_PARTICLES 1009
+#define SIM_NODE_TIME 1010
+#define SIM_NODE_PARTICLE_ATTRIBUTE 1011
+
+/** \} */
+
 void init_nodesystem(void);
 void free_nodesystem(void);
 
diff --git a/source/blender/blenkernel/intern/node.c b/source/blender/blenkernel/intern/node.c
index 4af87a3f500..2237d061fe1 100644
--- a/source/blender/blenkernel/intern/node.c
+++ b/source/blender/blenkernel/intern/node.c
@@ -4227,6 +4227,19 @@ static void registerTextureNodes(void)
 static void registerSimulationNodes(void)
 {
   register_node_type_sim_group();
+
+  register_node_type_sim_particle_simulation();
+  register_node_type_sim_force();
+  register_node_type_sim_set_particle_attribute();
+  register_node_type_sim_particle_birth_event();
+  register_node_type_sim_particle_time_step_event();
+  register_node_type_sim_execute_condition();
+  register_node_type_sim_multi_execute();
+  register_node_type_sim_particle_mesh_emitter();
+  register_node_type_sim_particle_mesh_collision_event();
+  register_node_type_sim_emit_particles();
+  register_node_type_sim_time();
+  register_node_type_sim_particle_attribute();
 }
 
 void init_nodesystem(void)
diff --git a/source/blender/editors/space_node/drawnode.c b/source/blender/editors/space_node/drawnode.c
index 24b0bfd831f..4670f0fc6f6 100644
--- a/source/blender/editors/space_node/drawnode.c
+++ b/source/blender/editors/space_node/drawnode.c
@@ -3125,8 +3125,58 @@ static void node_texture_set_butfunc(bNodeType *ntype)
 
 /* ****************** BUTTON CALLBACKS FOR SIMULATION NODES ***************** */
 
-static void node_simulation_set_butfunc(bNodeType *UNUSED(ntype))
+static void node_simulation_buts_particle_simulation(uiLayout *layout,
+                                                     bContext *UNUSED(C),
+                                                     PointerRNA *ptr)
 {
+  uiItemR(layout, ptr, "name", 0, "", ICON_NONE);
+}
+
+static void node_simulation_buts_particle_time_step_event(uiLayout *layout,
+                                                          bContext *UNUSED(C),
+                                                          PointerRNA *ptr)
+{
+  uiItemR(layout, ptr, "mode", 0, "", ICON_NONE);
+}
+
+static void node_simulation_buts_particle_attribute(uiLayout *layout,
+                                                    bContext *UNUSED(C),
+                                                    PointerRNA *ptr)
+{
+  uiItemR(layout, ptr, "data_type", 0, "", ICON_NONE);
+}
+
+static void node_simulation_buts_set_particle_attribute(uiLayout *layout,
+                                                        bContext *UNUSED(C),
+                                                        PointerRNA *ptr)
+{
+  uiItemR(layout, ptr, "data_type", 0, "", ICON_NONE);
+}
+
+static void node_simulation_buts_time(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
+{
+  uiItemR(layout, ptr, "mode", 0, "", ICON_NONE);
+}
+
+static void node_simulation_set_butfunc(bNodeType *ntype)
+{
+  switch (ntype->type) {
+    case SIM_NODE_PARTICLE_SIMULATION:
+      ntype->draw_buttons = node_simulation_buts_particle_simulation;
+      break;
+    case SIM_NODE_PARTICLE_TIME_STEP_EVENT:
+      ntype->draw_buttons = node_simulation_buts_particle_time_step_event;
+      break;
+    case SIM_NODE_PARTICLE_ATTRIBUTE:
+      ntype->draw_buttons = node_simulation_buts_particle_attribute;
+      break;
+    case SIM_NODE_SET_PARTICLE_ATTRIBUTE:
+      ntype->draw_buttons = node_simulation_buts_set_particle_attribute;
+      break;
+    case SIM_NODE_TIME:
+      ntype->draw_buttons = node_simulation_buts_time;
+      break;
+  }
 }
 
 /* ****** init draw callbacks for all tree types, only called in usiblender.c, once ************ */
diff --git a/source/blender/makesdna/DNA_node_types.h b/source/blender/makesdna/DNA_node_types.h
index d8c8b5a8a29..81911116b66 100644
--- a/source/blender/makesdna/DNA_node_types.h
+++ b/source/blender/makesdna/DNA_node_types.h
@@ -1400,4 +1400,16 @@ typedef enum NodeShaderOutputTarget {
   SHD_OUTPUT_CYCLES = 2,
 } NodeShaderOutputTarget;
 
+/* Particle Time Step Event node */
+typedef enum NodeSimParticleTimeStepEventType {
+  NODE_PARTICLE_TIME_STEP_EVENT_BEGIN = 0,
+  NODE_PARTICLE_TIME_STEP_EVENT_END = 1,
+} NodeSimParticleTimeStepEventType;
+
+/* Simulation Time node */
+typedef enum NodeSimInputTimeType {
+  NODE_SIM_INPUT_SIMULATION_TIME = 0,
+  NODE_SIM_INPUT_SCENE_TIME = 1,
+} NodeSimInputTimeType;
+
 #endif
diff --git a/source/blender/makesrna/intern/rna_nodetree.c b/source/blender/makesrna/intern/rna_nodetree.c
index 51bcb608db0..0c4583983a8 100644
--- a/source/blender/makesrna/intern/rna_nodetree.c
+++ b/source/blender/makesrna/intern/rna_nodetree.c
@@ -90,6 +90,17 @@ static const EnumPropertyItem node_socket_type_items[] = {
     {0, NULL, 0, NULL, NULL},
 };
 
+static const EnumPropertyItem particle_attribute_socket_type_items[] = {
+    {SOCK_FLOAT, "FLOAT", 0, "Float", ""},
+    {SOCK_INT, "INT", 0, "Int", ""},
+    {SOCK_BOOLEAN, "BOOLEAN", 0, "Boolean", ""},
+    {SOCK_VECTOR, "VECTOR", 0, "Vector", ""},
+    {SOCK_RGBA, "RGBA", 0, "Color", ""},
+    {SOCK_OBJECT, "OBJECT", 0, "Object", ""},
+    {SOCK_IMAGE, "IMAGE", 0, "Image", ""},
+    {0, NULL, 0, NULL, NULL},
+};
+
 static const EnumPropertyItem node_quality_items[] = {
     {NTREE_QUALITY_HIGH, "HIGH", 0, "High", "High quality"},
     {NTREE_QUALITY_MEDIUM, "MEDIUM", 0, "Medium", "Medium quality"},
@@ -3632,6 +3643,15 @@ static void rna_CompositorNodeScale_update(Main *bmain, Scene *scene, PointerRNA
   rna_Node_update(bmain, scene, ptr);
 }
 
+static void rna_SimulationNode_socket_update(Main *bmain, Scene *scene, PointerRNA *ptr)
+{
+  bNodeTree *ntree = (bNodeTree *)ptr->owner_id;
+  bNode *node = (bNode *)ptr->data;
+
+  nodeUpdate(ntree, node);
+  rna_Node_update(bmain, scene, ptr);
+}
+
 static PointerRNA rna_ShaderNodePointDensity_psys_get(PointerRNA *ptr)
 {
   bNode *node = ptr->data;
@@ -7941,6 +7961,82 @@ static void def_tex_bricks(StructRNA *srna)
   RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_update");
 }
 
+/* -- Simulation Nodes --------------------------------------------------------- */
+
+static void def_sim_particle_time_step_event(StructRNA *srna)
+{
+  static const EnumPropertyItem mode_items[] = {
+      {NODE_PARTICLE_TIME_STEP_EVENT_BEGIN,
+       "BEGIN",
+       0,
+       "Begin",
+       "Execute for every particle at the beginning of each time step"},
+      {NODE_PARTICLE_TIME_STEP_EVENT_END,
+       "END",
+       0,
+       "End",
+       "Execute for every particle at the end of each time step"},
+      {0, NULL, 0, NULL, NULL},
+  };
+
+  PropertyRNA *prop;
+
+  prop = RNA_def_property(srna, "mode", PROP_ENUM, PROP_NONE);
+  RNA_def_property_enum_sdna(prop, NULL, "custom1");
+  RNA_def_property_enum_items(prop, mode_items);
+  RNA_def_property_ui_text(prop, "Mode", "When in each time step is the event triggered");
+  RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_update");
+}
+
+static void def_sim_particle_attribute(StructRNA *srna)
+{
+  PropertyRNA *prop;
+
+  prop = RNA_def_property(srna, "data_type", PROP_ENUM, PROP_NONE);
+  RNA_def_property_enum_sdna(prop, NULL, "custom1");
+  RNA_def_property_enum_items(prop, particle_attribute_socket_type_items);
+  RNA_def_property_ui_text(
+      prop,
+      "Data Type",
+      "Expected type of the attribute. A default value is returned if the type is not correct");
+  RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_SimulationNode_socket_update");
+}
+
+static void def_sim_set_particle_attribute(StructRNA *srna)
+{
+  PropertyRNA *prop;
+
+  prop = RNA_def_property(srna, "data_type", PROP_ENUM, PROP_NONE);
+  RNA_def_property_enum_sdna(prop, NULL, "custom1");
+  RNA_def_property_enum_items(prop, particle_attribute_socket_type_items);
+  RNA_def_property_ui_text(
+      prop,
+      "Data Type",
+      "Expected type of the attribute. Nothing is done if the type is not correct");
+  RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_SimulationNode_socket_update");
+}
+
+static void def_sim_time(StructRNA *srna)
+{
+  static const EnumPropertyItem mode_items[] = {
+      {NODE_SIM_INPUT_SIMULATION_TIME,
+       "SIMULATION_TIME",
+       0,
+       "Simulation Time",
+       "Time since start of simulation"},
+      {NODE_SIM_INPUT_SCENE_TIME, "SCENE_TIME", 0, "Scene Time", "Time shown in the timeline"},
+      {0, NULL, 0, NULL, NULL},
+  };
+
+  PropertyRNA *prop;
+
+  prop = RNA_def_property(srna, "mode", PROP_ENUM, PROP_NONE);
+  RNA_def_property_enum_sdna(prop, NULL, "custom1");
+  RNA_def_property_enum_items(prop, mode_items);
+  RNA_def_property_ui_text(prop, "Mode", "The time to output");
+  RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_SimulationNode_socket_update");
+}
+
 /* -------------------------------------------------------------------------- */
 
 static void rna_def_shader_node(BlenderRNA *brna)
diff --git a/source/blender/nodes/CMakeLists.txt b/source/blender/nodes/CMakeLists.txt
index 59a0ee808f5..84c82c84fd0 100644
--- a/source/blender/nodes/CMakeLists.txt
+++ b/source/blender/nodes/CMakeLists.txt
@@ -222,6 +222,18 @@ set(SRC
   shader/node_shader_util.c
 
   simulation/nodes/node_sim_common.cc
+  simulation/nodes/node_sim_emit_particles.cc
+  simulation/nodes/node_sim_execute_condition.cc
+  simulation/nodes/node_sim_force.cc
+  simulation/nodes/node_sim_multi_execute.cc
+  simulation/nodes/node_sim_particle_attribute.cc
+  simulation/nodes/node_sim_particle_birth_event.cc
+  simulation/nodes/node_sim_particle_mesh_collision_event.cc
+  simulation/nodes/node_sim_particle_mesh_emitter.cc
+  simulation/nodes/node_sim_particle_simulation.cc
+  simulation/nodes/node_sim_particle_time_step_event.cc
+  simulation/nodes/node_sim_set_particle_attribute.cc
+  simulation/nodes/node_sim_simulation_time.cc
   simulation/node_simulation_tree.cc
   simulation/node_simulation_util.cc
 
diff --git a/source/blender/nodes/NOD_simulation.h b/source/blender/nodes/NOD_simulation.h
index 835f742b17a..2947d38fe83 100644
--- a/source/blender/nodes/NOD_simulation.h
+++ b/source/blender/nodes/NOD_simulation.h
@@ -27,6 +27,19 @@ void register_node_tree_type_sim(void);
 
 void register_node_type_sim_group(void);
 
+void register_node_type_sim_particle_simulation(void);
+void register_node_type_sim_force(void);
+void register_node_type_sim_set_particle_attribute(void);
+void register_node_type_sim_particle_birth_event(void);
+void register_node_type_sim_particle_time_step_event(void);
+void register_node_type_sim_execute_condition(void);
+void register_node_type_sim_multi_execute(void);
+void register_node_type_sim_particle_mesh_emitter(void);
+void register_node_type_sim_particle_mesh_collision_event(void);
+void register_node_type_sim_emit_particles(void);
+void register_node_type_sim_time(void);
+void register_node_type_sim_particle_attribute(void);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/source/blender/nodes/NOD_static_types.h b/source/blender/nodes/NOD_static_types.h
index 7fec3324aab..bf484133afa 100644
--- a/source/blender/nodes/NOD_static_types.h
+++ b/source/blender/nodes/NOD_static_types.h
@@ -258,6 +258,19 @@ DefNode(TextureNode,    TEX_NODE_PROC+TEX_NOISE, 0,                      "TEX_NO
 DefNode(TextureNode,    TEX_NODE_PROC+TEX_STUCCI, 0,                     "TEX_STUCCI",     TexStucci,        "Stucci",            ""              )
 DefNode(TextureNode,    TEX_NODE_PROC+TEX_DISTNOISE, 0,                  "TEX_DISTNOISE",  TexDistNoise,     "Distorted Noise",   ""              )
 
+DefNode(SimulationNode, SIM_NODE_PARTICLE_SIMULATION, 0,                 "PARTICLE_SIMULATION", ParticleSimulation, "Particle Simulation", "")
+DefNode(SimulationNode, SIM_NODE_FORCE,        0,                        "FORCE",               Force,              "Force",               "")
+DefNode(SimulationNode, SIM_NODE_SET_PARTICLE_ATTRIBUTE, def_sim_set_particle_attribute, "SET_PARTICLE_ATTRIBUTE", SetParticleAttribute, "Set Particle Attribute", "")
+DefNode(SimulationNode, SIM_NODE_PARTICLE_BIRTH_EVENT,   0,              "PARTICLE_BIRTH_EVENT",   ParticleBirthEvent,   "Particle Birth Event",   "")
+DefNode(SimulationNode, SIM_NODE_PARTICLE_TIME_STEP_EVENT, def_sim_particle_time_step_event, "PARTICLE_TIME_STEP_EVENT", ParticleTimeStepEvent, "Particle Time Step Event", "")
+DefNode(SimulationNode, SIM_NODE_EXECUTE_CONDITION,   0,                 "EXECUTE_CONDITION",   ExecuteCondition,   "Execute Condition",    "")
+DefNode(SimulationNode, SIM_NODE_MULTI_EXECUTE,       0,                 "MULTI_EXECUTE",       MultiExecute,       "Multi Execute",        "")
+DefNode(SimulationNode, SIM_NODE_PARTICLE_MESH_EMITTER,  0,              "PARTICLE_MESH_EMITTER",  ParticleMeshEmitter,  "Particle Mesh Emitter", "")
+DefNode(SimulationNode, SIM_NODE_PARTICLE_MESH_COLLISION_EVENT, 0,       "PARTICLE_MESH_COLLISION_EVENT", ParticleMeshCollisionEvent, "Particle Mesh Collision Event", "")
+DefNode(SimulationNode, SIM_NODE_EMIT_PARTICLES, 0,                      "EMIT_PARTICLES",      EmitParticles,      "Emit Particles",       "")
+DefNode(SimulationNode, SIM_NODE_TIME,           def_sim_time,           "TIME",                Time,               "Time",                 "")
+DefNode(SimulationNode, SIM_NODE_PARTICLE_ATTRIBUTE, def_sim_particle_attribute, "PARTICLE_ATTRIBUTE",  ParticleAttribute,  "Particle Attribute",   "")
+
 /* undefine macros */
 #undef DefNode
 
diff --git a/source/blender/nodes/simulation/nodes/node_sim_emit_particles.cc b/source/blender/nodes/simulation/nodes/node_sim_emit_particles.cc
new file mode 100644
index 00000000000..e23984dbf34
--- /dev/null
+++ b/source/blender/nodes/simulation/nodes/node_sim_emit_particles.cc
@@ -0,0 +1,38 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "node_simulation_util.h"
+
+static bNodeSocketTemplate sim_node_emit_particle_in[] = {
+    {SOCK_INT, N_("Amount"), 10, 0, 0, 0, 0, 10000000},
+    {SOCK_CONTROL_FLOW, N_("Execute")},
+    {-1, ""},
+};
+
+static bNodeSocketTemplate sim_node_emit_particle_out[] = {
+    {SOCK_CONTROL_FLOW, N_("Execute")},
+    {SOCK_EMITTERS, N_("Emitter")},
+    {-1, ""},
+};
+
+void register_node_type_sim_emit_particles()
+{
+  static bNodeType ntype;
+
+  sim_node_type_base(&ntype, SIM_NODE_EMIT_PARTICLES, "Emit Particles", 0, 0);
+  node_type_socket_templates(&ntype, sim_node_emit_particle_in, sim_node_emit_particle_out);
+  nodeRegisterType(&ntype);
+}
diff --git a/source/blender/nodes/simulation/nodes/node_sim_execute_condition.cc b/source/blender/nodes/simulation/nodes/node_sim_execute_condition.cc
new file mode 100644
index 00000000000..69f30d1ad0d
--- /dev/null
+++ b/source/blender/nodes/simulation/nodes/node_sim_execute_condition.cc
@@ -0,0 +1,39 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "node_simulation_util.h"
+
+static bNodeSocketTemplate sim_node_execute_condition_in[] = {
+    {SOCK_BOOLEAN, N_("Condition")},
+    {SOCK_CONTROL_FLOW, N_("If True")},
+    {SOCK_CONTROL_FLOW, N_("If False")},
+    {-1, ""},
+};
+
+static bNodeSocketTemplate sim_node_execute_condition_out[] = {
+    {SOCK_CONTROL_FLOW, N_("Execute")},
+    {-1, ""},
+};
+
+void register_node_type_sim_execute_condition()
+{
+  static bNodeType ntype;
+
+  sim_node_type_base(&ntype, SIM_NODE_EXECUTE_CONDITION, "Execute Condition", 0, 0);
+  node_type_socket_templates(
+      &ntype, sim_node_execute_condition_in, sim_node_execute_condition_out);
+  nodeRegisterType(&ntype);
+}
diff --git a/source/blender/nodes/simulation/nodes/node_sim_force.cc b/source/blender/nodes/simulation/nodes/node_sim_force.cc
new file mode 100644
index 00000000000..eccd2e4e2ab
--- /dev/null
+++ b/source/blender/nodes/simulation/nodes/node_sim_force.cc
@@ -0,0 +1,36 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "node_simulation_util.h"
+
+static bNodeSocketTemplate sim_node_force_in[] = {
+    {SOCK_VECTOR, N_("Force"), 0.0f, 0.0f, 0.0f, 0.0f, -10000.0f, 10000.0f},
+    {-1, ""},
+};
+
+static bNodeSocketTemplate sim_node_force_out[] = {
+    {SOCK_FORCES, N_("Force")},
+    {-1, ""},
+};
+
+void register_node_type_sim_force()
+{
+  static bNodeType ntype;
+
+  sim_node_type_base(&ntype, SIM_NODE_FORCE, "Force", 0, 0);
+  node_type_socket_templates(&ntype, sim_node_force_in, sim_node_force_out);
+  nodeRegisterType(&ntype);
+}
diff --git a/source/blender/nodes/simulation/nodes/node_sim_multi_execute.cc b/source/blender/nodes/simulation/nodes/node_sim_multi_execute.cc
new file mode 100644
index 00000000000..5944db7e2bc
--- /dev/null
+++ b/source/blender/nodes/simulation/nodes/node_sim_multi_execute.cc
@@ -0,0 +1,38 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "node_simulation_util.h"
+
+static bNodeSocketTemplate sim_node_multi_execute_in[] = {
+    {SOCK_CONTROL_FLOW, "1"},
+    {SOCK_CONTROL_FLOW, "2"},
+    {SOCK_CONTROL_FLOW, "3"},
+    {-1, ""},
+};
+
+static bNodeSocketTemplate sim_node_multi_execute_out[] = {
+    {SOCK_CONTROL_FLOW, N_("Execute")},
+    {-1, ""},
+};
+
+void register_node_type_sim_multi_execute()
+{
+  static bNodeType ntype;
+
+  sim_node_type_base(&ntype, SIM_NODE_MULTI_EXECUTE, "Multi Execute", 0, 0);
+  node_type_socket_templates(&ntype, sim_node_multi_execute_in, sim_node_multi_execute_out);
+  nodeRegisterType(&ntype);
+}
diff --git a/source/blender/nodes/simulation/nodes/node_sim_particle_attribute.cc b/source/blender/nodes/simulation/nodes/node_sim_particle_attribute.cc
new file mode 100644
index 00000000000..b6b67ee334e
--- /dev/null
+++ b/source/blender/nodes/simulation/nodes/node_sim_particle_attribute.cc
@@ -0,0 +1,52 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "BLI_listbase.h"
+#include "node_simulation_util.h"
+
+static bNodeSocketTemplate sim_node_particle_attribute_in[] = {
+    {SOCK_STRING, N_("Name")},
+    {-1, ""},
+};
+
+static bNodeSocketTemplate sim_node_particle_attribute_out[] = {
+    {SOCK_FLOAT, N_("Float")},
+    {SOCK_INT, N_("Int")},
+    {SOCK_BOOLEAN, N_("Boolean")},
+    {SOCK_VECTOR, N_("Vector")},
+    {SOCK_RGBA, N_("Color")},
+    {SOCK_OBJECT, N_("Object")},
+    {SOCK_IMAGE, N_("Image")},
+    {-1, ""},
+};
+
+static void sim_node_particle_attribute_update(bNodeTree *UNUSED(ntree), bNode *node)
+{
+  LISTBASE_FOREACH (bNodeSocket *, sock, &node->outputs) {
+    nodeSetSocketAvailability(sock, sock->type == node->custom1);
+  }
+}
+
+void register_node_type_sim_particle_attribute()
+{
+  static bNodeType ntype;
+
+  sim_node_type_base(&ntype, SIM_NODE_PARTICLE_ATTRIBUTE, "Particle Attribute", 0, 0);
+  node_type_socket_templates(
+      &ntype, sim_node_particle_attribute_in, sim_node_particle_attribute_out);
+  node_type_update(&ntype, sim_node_particle_attribute_update);
+  nodeRegisterType(&ntype);
+}
diff --git a/source/blender/nodes/simulation/nodes/node_sim_particle_birth_event.cc b/source/blender/nodes/simulation/nodes/node_sim_particle_birth_event.cc
new file mode 100644
index 00000000000..8332a3ecd9f
--- /dev/null
+++ b/source/blender/nodes/simulation/nodes/node_sim_particle_birth_event.cc
@@ -0,0 +1,37 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "node_simulation_util.h"
+
+static bNodeSocketTemplate sim_node_particle_birth_event_in[] = {
+    {SOCK_CONTROL_FLOW, N_("Execute")},
+    {-1, ""},
+};
+
+static bNodeSocketTemplate sim_node_particle_birth_event_out[] = {
+    {SOCK_EVENTS, N_("Event")},
+    {-1, ""},
+};
+
+void register_node_type_sim_particle_birth_event()
+{
+  static bNodeType ntype;
+
+  sim_node_type_base(&ntype, SIM_NODE_PARTICLE_BIRTH_EVENT, "Particle Birth Event", 0, 0);
+  node_type_socket_templates(
+      &ntype, sim_node_particle_birth_event_in, sim_node_particle_birth_event_out);
+  nodeRegisterType(&ntype);
+}
diff --git a/source/blender/nodes/simulation/nodes/node_sim_particle_mesh_collision_event.cc b/source/blender/nodes/simulation/nodes/node_sim_particle_mesh_collision_event.cc
new file mode 100644
index 00000000000..48671172136
--- /dev/null
+++ b/source/blender/nodes/simulation/nodes/node_sim_particle_mesh_collision_event.cc
@@ -0,0 +1,40 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "node_simulation_util.h"
+
+static bNodeSocketTemplate sim_node_particle_mesh_collision_event_in[] = {
+    {SOCK_OBJECT, N_("Object")},
+    {SOCK_CONTROL_FLOW, N_("Execute")},
+    {-1, ""},
+};
+
+static bNodeSocketTemplate sim_node_particle_mesh_collision_event_out[] = {
+    {SOCK_EVENTS, N_("Event")},
+    {-1, ""},
+};
+
+void register_node_type_sim_particle_mesh_collision_event()
+{
+  static bNodeType ntype;
+
+  sim_node_type_base(
+      &ntype, SIM_NODE_PARTICLE_MESH_COLLISION_EVENT, "Particle Mesh Collision Event", 0, 0);
+  node_type_socket_templates(&ntype,
+                             sim_node_particle_mesh_collision_event_in,
+                             sim_node_particle_mesh_collision_event_out);
+  nodeRegisterType(&ntype);
+}
diff --git a/source/blender/nodes/simulation/nodes/node_sim_particle_mesh_emitter.cc b/source/blender/nodes/simulation/nodes/node_sim_particle_mesh_emitter.cc
new file mode 100644
index 00000000000..2de7be2d3eb
--- /dev/null
+++ b/source/blender/nodes/simulation/nodes/node_sim_particle_mesh_emitter.cc
@@ -0,0 +1,40 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "node_simulation_util.h"
+
+#include "float.h"
+
+static bNodeSocketTemplate sim_node_particle_mesh_emitter_in[] = {
+    {SOCK_OBJECT, N_("Object")},
+    {SOCK_FLOAT, N_("Rate"), 10.0f, 0.0f, 0.0f, 0.0f, 0.0f, FLT_MAX},
+    {-1, ""},
+};
+
+static bNodeSocketTemplate sim_node_particle_mesh_emitter_out[] = {
+    {SOCK_EMITTERS, N_("Emitter")},
+    {-1, ""},
+};
+
+void register_node_type_sim_particle_mesh_emitter()
+{
+  static bNodeType ntype;
+
+  sim_node_type_base(&ntype, SIM_NODE_PARTICLE_MESH_EMITTER, "Mesh Emitter", 0, 0);
+  node_type_socket_templates(
+      &ntype, sim_node_particle_mesh_emitter_in, sim_node_particle_mesh_emitter_out);
+  nodeRegisterType(&ntype);
+}
diff --git a/source/blender/nodes/simulation/nodes/node_sim_particle_simulation.cc b/source/blender/nodes/simulation/nodes/node_sim_particle_simulation.cc
new file mode 100644
index 00000000000..159c9b23da1
--- /dev/null
+++ b/source/blender/nodes/simulation/nodes/node_sim_particle_simulation.cc
@@ -0,0 +1,39 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "node_simulation_util.h"
+
+static bNodeSocketTemplate sim_node_particle_simulation_in[] = {
+    {SOCK_EMITTERS, N_("Emitters")},
+    {SOCK_EVENTS, N_("Events")},
+    {SOCK_FORCES, N_("Forces")},
+    {-1, ""},
+};
+
+static bNodeSocketTemplate sim_node_particle_simulation_out[] = {
+    {-1, ""},
+};
+
+void register_node_type_sim_particle_simulation()
+{
+  static bNodeType ntype;
+
+  sim_node_type_base(
+      &ntype, SIM_NODE_PARTICLE_SIMULATION, "Particle Simulation", NODE_CLASS_OUTPUT, 0);
+  node_type_socket_templates(
+      &ntype, sim_node_particle_simulation_in, sim_node_particle_simulation_out);
+  nodeRegisterType(&ntype);
+}
diff --git a/source/blender/nodes/simulation/nodes/node_sim_particle_time_step_event.cc b/source/blender/nodes/simulation/nodes/node_sim_particle_time_step_event.cc
new file mode 100644
index 00000000000..cda8ddeb644
--- /dev/null
+++ b/source/blender/nodes/simulation/nodes/node_sim_particle_time_step_event.cc
@@ -0,0 +1,37 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "node_simulation_util.h"
+
+static bNodeSocketTemplate sim_node_particle_time_step_event_in[] = {
+    {SOCK_CONTROL_FLOW, N_("Execute")},
+    {-1, ""},
+};
+
+static bNodeSocketTemplate sim_node_particle_time_step_event_out[] = {
+    {SOCK_EVENTS, N_("Event")},
+    {-1, ""},
+};
+
+void register_node_type_sim_particle_time_step_event()
+{
+  static bNodeType ntype;
+
+  sim_node_type_base(&ntype, SIM_NODE_PARTICLE_TIME_STEP_EVENT, "Particle Time Step Event", 0, 0);
+  node_type_socket_templates(
+      &ntype, sim_node_particle_time_step_event_in, sim_node_particle_time_step_event_out);
+  nodeRegisterType(&ntype);
+}
diff --git a/source/blender/nodes/simulation/nodes/node_sim_set_particle_attribute.cc b/source/blender/nodes/simulation/nodes/node_sim_set_particle_attribute.cc
new file mode 100644
index 00000000000..8696dbe340c
--- /dev/null
+++ b/source/blender/nodes/simulation/nodes/node_sim_set_particle_attribute.cc
@@ -0,0 +1,57 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "BLI_listbase.h"
+#include "node_simulation_util.h"
+
+static bNodeSocketTemplate sim_node_set_particle_attribute_in[] = {
+    {SOCK_STRING, N_("Name")},
+    {SOCK_FLOAT, N_("Float"), 0.0f, 0.0f, 0.0f, 0.0f, -10000.0f, 10000.0f},
+    {SOCK_INT, N_("Int"), 0, 0, 0, 0, -10000, 10000},
+    {SOCK_BOOLEAN, N_("Boolean")},
+    {SOCK_VECTOR, N_("Vector")},
+    {SOCK_RGBA, N_("Color")},
+    {SOCK_OBJECT, N_("Object")},
+    {SOCK_IMAGE, N_("Image")},
+    {-1, ""},
+};
+
+static bNodeSocketTemplate sim_node_set_particle_attribute_out[] = {
+    {SOCK_CONTROL_FLOW, N_("Execute")},
+    {-1, ""},
+};
+
+static void sim_node_set_particle_attribute_update(bNodeTree *UNUSED(ntree), bNode *node)
+{
+  int index = 0;
+  LISTBASE_FOREACH (bNodeSocket *, sock, &node->inputs) {
+    if (index >= 1) {
+      nodeSetSocketAvailability(sock, sock->type == node->custom1);
+    }
+    index++;
+  }
+}
+
+void register_node_type_sim_set_particle_attribute()
+{
+  static bNodeType ntype;
+
+  sim_node_type_base(&ntype, SIM_NODE_SET_PARTICLE_ATTRIBUTE, "Set Particle Attribute", 0, 0);
+  node_type_socket_templates(
+      &ntype, sim_node_set_particle_attribute_in, sim_node_set_particle_attribute_out);
+  node_type_update(&ntype, sim_node_set_particle_attribute_update);
+  nodeRegisterType(&ntype);
+}
diff --git a/source/blender/nodes/simulation/nodes/node_sim_simulation_time.cc b/source/blender/nodes/simulation/nodes/node_sim_simulation_time.cc
new file mode 100644
index 00000000000..40e1c43fb69
--- /dev/null
+++ b/source/blender/nodes/simulation/nodes/node_sim_simulation_time.cc
@@ -0,0 +1,31 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "node_simulation_util.h"
+
+static bNodeSocketTemplate sim_node_time_out[] = {
+    {SOCK_FLOAT, N_("Time")},
+    {-1, ""},
+};
+
+void register_node_type_sim_time()
+{
+  static bNodeType ntype;
+
+  sim_node_type_base(&ntype, SIM_NODE_TIME, "Time", 0, 0);
+  node_type_socket_templates(&ntype, nullptr, sim_node_time_out);
+  nodeRegisterType(&ntype);
+}