Add plane primitive node

7 files changed, 169 insertions, 3 deletions

diff --git a/release/scripts/startup/nodeitems_builtins.py b/release/scripts/startup/nodeitems_builtins.py
index 0925445942e..cd894343e97 100644
--- a/release/scripts/startup/nodeitems_builtins.py
+++ b/release/scripts/startup/nodeitems_builtins.py
@@ -527,9 +527,8 @@ geometry_node_categories = [
         NodeItem("GeometryNodeMeshIcoSphere"),
         NodeItem("GeometryNodeMeshCylinder"),
         NodeItem("GeometryNodeMeshCone"),
-        NodeItem("GeometryNodeMeshLine")
-        # NodeItem("GeometryNodeMeshPlane"),
-        # NodeItem("GeometryNodeMeshGrid"),
+        NodeItem("GeometryNodeMeshLine"),
+        NodeItem("GeometryNodeMeshPlane"),
     ]),
     GeometryNodeCategory("GEO_POINT", "Point", items=[
         NodeItem("GeometryNodePointDistribute"),
diff --git a/source/blender/blenkernel/BKE_node.h b/source/blender/blenkernel/BKE_node.h
index 15fc52e7cc3..6d50deae072 100644
--- a/source/blender/blenkernel/BKE_node.h
+++ b/source/blender/blenkernel/BKE_node.h
@@ -1381,6 +1381,7 @@ int ntreeTexExecTree(struct bNodeTree *ntree,
 #define GEO_NODE_MESH_PRIMITIVE_ICO_SPHERE 1036
 #define GEO_NODE_MESH_PRIMITIVE_CONE 1037
 #define GEO_NODE_MESH_PRIMITIVE_LINE 1038
+#define GEO_NODE_MESH_PRIMITIVE_PLANE 1039
 
 /** \} */
 
diff --git a/source/blender/blenkernel/intern/node.cc b/source/blender/blenkernel/intern/node.cc
index 2874c5c3a96..0b8c0ffcc2b 100644
--- a/source/blender/blenkernel/intern/node.cc
+++ b/source/blender/blenkernel/intern/node.cc
@@ -4812,6 +4812,7 @@ static void registerGeometryNodes()
   register_node_type_geo_mesh_primitive_cylinder();
   register_node_type_geo_mesh_primitive_ico_sphere();
   register_node_type_geo_mesh_primitive_line();
+  register_node_type_geo_mesh_primitive_plane();
   register_node_type_geo_mesh_primitive_uv_sphere();
   register_node_type_geo_object_info();
   register_node_type_geo_point_distribute();
diff --git a/source/blender/nodes/CMakeLists.txt b/source/blender/nodes/CMakeLists.txt
index 697647e7b2d..30184e1dee7 100644
--- a/source/blender/nodes/CMakeLists.txt
+++ b/source/blender/nodes/CMakeLists.txt
@@ -166,6 +166,7 @@ set(SRC
   geometry/nodes/node_geo_mesh_primitive_cone.cc
   geometry/nodes/node_geo_mesh_primitive_cube.cc
   geometry/nodes/node_geo_mesh_primitive_cylinder.cc
+  geometry/nodes/node_geo_mesh_primitive_plane.cc
   geometry/nodes/node_geo_mesh_primitive_ico_sphere.cc
   geometry/nodes/node_geo_mesh_primitive_line.cc
   geometry/nodes/node_geo_mesh_primitive_uv_sphere.cc
diff --git a/source/blender/nodes/NOD_geometry.h b/source/blender/nodes/NOD_geometry.h
index 8ecda078b46..86d3861c5ba 100644
--- a/source/blender/nodes/NOD_geometry.h
+++ b/source/blender/nodes/NOD_geometry.h
@@ -47,6 +47,7 @@ void register_node_type_geo_join_geometry(void);
 void register_node_type_geo_mesh_primitive_circle(void);
 void register_node_type_geo_mesh_primitive_cone(void);
 void register_node_type_geo_mesh_primitive_cube(void);
+void register_node_type_geo_mesh_primitive_plane(void);
 void register_node_type_geo_mesh_primitive_cylinder(void);
 void register_node_type_geo_mesh_primitive_ico_sphere(void);
 void register_node_type_geo_mesh_primitive_line(void);
diff --git a/source/blender/nodes/NOD_static_types.h b/source/blender/nodes/NOD_static_types.h
index 50f45859d1a..eac9ae695c7 100644
--- a/source/blender/nodes/NOD_static_types.h
+++ b/source/blender/nodes/NOD_static_types.h
@@ -308,6 +308,7 @@ DefNode(GeometryNode, GEO_NODE_MESH_PRIMITIVE_CYLINDER, def_geo_mesh_cylinder, "
 DefNode(GeometryNode, GEO_NODE_MESH_PRIMITIVE_ICO_SPHERE, 0, "MESH_PRIMITIVE_ICO_SPHERE", MeshIcoSphere, "Ico Sphere", "")
 DefNode(GeometryNode, GEO_NODE_MESH_PRIMITIVE_CONE, def_geo_mesh_cone, "MESH_PRIMITIVE_CONE", MeshCone, "Cone", "")
 DefNode(GeometryNode, GEO_NODE_MESH_PRIMITIVE_LINE, def_geo_mesh_line, "MESH_PRIMITIVE_LINE", MeshLine, "Line", "")
+DefNode(GeometryNode, GEO_NODE_MESH_PRIMITIVE_PLANE, 0, "MESH_PRIMITIVE_PLANE", MeshPlane, "Plane", "")
 
 /* undefine macros */
 #undef DefNode
diff --git a/source/blender/nodes/geometry/nodes/node_geo_mesh_primitive_plane.cc b/source/blender/nodes/geometry/nodes/node_geo_mesh_primitive_plane.cc
new file mode 100644
index 00000000000..df7ee046e58
--- /dev/null
+++ b/source/blender/nodes/geometry/nodes/node_geo_mesh_primitive_plane.cc
@@ -0,0 +1,162 @@
+/*
+ * 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_map.hh"
+#include "BLI_math_matrix.h"
+
+#include "DNA_mesh_types.h"
+#include "DNA_meshdata_types.h"
+
+#include "BKE_mesh.h"
+
+#include "UI_interface.h"
+#include "UI_resources.h"
+
+#include "node_geometry_util.hh"
+
+static bNodeSocketTemplate geo_node_mesh_primitive_plane_in[] = {
+    {SOCK_FLOAT, N_("Size"), 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, FLT_MAX, PROP_DISTANCE},
+    {SOCK_INT, N_("Vertices X"), 10, 0.0f, 0.0f, 0.0f, 2, 1000},
+    {SOCK_INT, N_("Vertices Y"), 10, 0.0f, 0.0f, 0.0f, 2, 1000},
+    {SOCK_VECTOR, N_("Location"), 0.0f, 0.0f, 0.0f, 1.0f, -FLT_MAX, FLT_MAX, PROP_TRANSLATION},
+    {SOCK_VECTOR, N_("Rotation"), 0.0f, 0.0f, 0.0f, 1.0f, -FLT_MAX, FLT_MAX, PROP_EULER},
+    {-1, ""},
+};
+
+static bNodeSocketTemplate geo_node_mesh_primitive_plane_out[] = {
+    {SOCK_GEOMETRY, N_("Geometry")},
+    {-1, ""},
+};
+
+namespace blender::nodes {
+
+static Mesh *create_plane_mesh(const int verts_x, const int verts_y, const float size)
+{
+  const int edges_x = verts_x - 1;
+  const int edges_y = verts_y - 1;
+  Mesh *mesh = BKE_mesh_new_nomain(verts_x * verts_y,
+                                   edges_x * verts_y + edges_y * verts_x,
+                                   0,
+                                   edges_x * edges_y * 4,
+                                   edges_x * edges_y);
+  MutableSpan<MVert> verts = MutableSpan<MVert>(mesh->mvert, mesh->totvert);
+  MutableSpan<MLoop> loops = MutableSpan<MLoop>(mesh->mloop, mesh->totloop);
+  MutableSpan<MEdge> edges = MutableSpan<MEdge>(mesh->medge, mesh->totedge);
+  MutableSpan<MPoly> polys = MutableSpan<MPoly>(mesh->mpoly, mesh->totpoly);
+
+  const float dx = size * 2.0f / (edges_x);
+  const float dy = size * 2.0f / (edges_y);
+
+  {
+    float x = -size;
+    for (const int x_index : IndexRange(verts_x)) {
+      float y = -size;
+      for (const int y_index : IndexRange(verts_y)) {
+        copy_v3_v3(verts[x_index * verts_y + y_index].co, float3(x, y, 0.0f));
+        y += dy;
+      }
+      x += dx;
+    }
+  }
+
+  /* Point all vertex normals in the up direction. */
+  short up_normal[3] = {0, 0, SHRT_MAX};
+  for (MVert &vert : verts) {
+    copy_v3_v3_short(vert.no, up_normal);
+  }
+
+  /* Build the horizontal edges in the X direction. */
+  const int y_edges_start = 0;
+  int edge_index = 0;
+  for (const int x : IndexRange(verts_x)) {
+    for (const int y : IndexRange(edges_y)) {
+      const int vert_index = x * verts_y + y;
+      MEdge &edge = edges[edge_index++];
+      edge.v1 = vert_index;
+      edge.v2 = vert_index + 1;
+    }
+  }
+
+  /* Build the vertical edges in the Y direction. */
+  const int x_edges_start = edge_index;
+  for (const int y : IndexRange(verts_y)) {
+    for (const int x : IndexRange(edges_x)) {
+      const int vert_index = x * verts_y + y;
+      MEdge &edge = edges[edge_index++];
+      edge.v1 = vert_index;
+      edge.v2 = vert_index + verts_y;
+    }
+  }
+
+  int loop_index = 0;
+  int poly_index = 0;
+  for (const int x : IndexRange(edges_x)) {
+    for (const int y : IndexRange(edges_y)) {
+      MPoly &poly = polys[poly_index++];
+      poly.loopstart = loop_index;
+      poly.totloop = 4;
+      const int vert_index = x * verts_y + y;
+
+      MLoop &loop_a = loops[loop_index++];
+      loop_a.v = vert_index;
+      loop_a.e = x_edges_start + edges_x * y + x;
+      MLoop &loop_b = loops[loop_index++];
+      loop_b.v = vert_index + verts_y;
+      loop_b.e = y_edges_start + edges_y * (x + 1) + y;
+      MLoop &loop_c = loops[loop_index++];
+      loop_c.v = vert_index + verts_y + 1;
+      loop_c.e = x_edges_start + edges_x * (y + 1) + x;
+      MLoop &loop_d = loops[loop_index++];
+      loop_d.v = vert_index + 1;
+      loop_d.e = y_edges_start + edges_y * x + y;
+    }
+  }
+
+  return mesh;
+}
+
+static void geo_node_mesh_primitive_plane_exec(GeoNodeExecParams params)
+{
+  const float size = params.extract_input<float>("Size");
+  const int verts_x = params.extract_input<int>("Vertices X");
+  const int verts_y = params.extract_input<int>("Vertices Y");
+  const float3 location = params.extract_input<float3>("Location");
+  const float3 rotation = params.extract_input<float3>("Rotation");
+  if (verts_x < 2 || verts_y < 2) {
+    params.set_output("Geometry", GeometrySet());
+    return;
+  }
+
+  Mesh *mesh = create_plane_mesh(verts_x, verts_y, size);
+  BLI_assert(BKE_mesh_is_valid(mesh));
+
+  transform_mesh(mesh, location, rotation, float3(1));
+
+  params.set_output("Geometry", GeometrySet::create_with_mesh(mesh));
+}
+
+}  // namespace blender::nodes
+
+void register_node_type_geo_mesh_primitive_plane()
+{
+  static bNodeType ntype;
+
+  geo_node_type_base(&ntype, GEO_NODE_MESH_PRIMITIVE_PLANE, "Plane", NODE_CLASS_GEOMETRY, 0);
+  node_type_socket_templates(
+      &ntype, geo_node_mesh_primitive_plane_in, geo_node_mesh_primitive_plane_out);
+  ntype.geometry_node_execute = blender::nodes::geo_node_mesh_primitive_plane_exec;
+  nodeRegisterType(&ntype);
+}