diff options
Diffstat (limited to 'source/blender/nodes/geometry/nodes/node_geo_mesh_primitive_circle.cc')
| -rw-r--r-- | source/blender/nodes/geometry/nodes/node_geo_mesh_primitive_circle.cc | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/source/blender/nodes/geometry/nodes/node_geo_mesh_primitive_circle.cc b/source/blender/nodes/geometry/nodes/node_geo_mesh_primitive_circle.cc new file mode 100644 index 00000000000..6d286a9d583 --- /dev/null +++ b/source/blender/nodes/geometry/nodes/node_geo_mesh_primitive_circle.cc @@ -0,0 +1,244 @@ +/* + * 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 "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_circle_in[] = { + {SOCK_INT, N_("Vertices"), 32, 0.0f, 0.0f, 0.0f, 3, 4096}, + {SOCK_FLOAT, N_("Radius"), 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, FLT_MAX, PROP_DISTANCE}, + {SOCK_VECTOR, N_("Location"), 0.0f, 0.0f, 0.0f, 0.0f, -FLT_MAX, FLT_MAX, PROP_TRANSLATION}, + {SOCK_VECTOR, N_("Rotation"), 0.0f, 0.0f, 0.0f, 0.0f, -FLT_MAX, FLT_MAX, PROP_EULER}, + {-1, ""}, +}; + +static bNodeSocketTemplate geo_node_mesh_primitive_circle_out[] = { + {SOCK_GEOMETRY, N_("Geometry")}, + {-1, ""}, +}; + +static void geo_node_mesh_primitive_circle_layout(uiLayout *layout, + bContext *UNUSED(C), + PointerRNA *ptr) +{ + uiLayoutSetPropSep(layout, true); + uiLayoutSetPropDecorate(layout, false); + uiItemR(layout, ptr, "fill_type", 0, nullptr, ICON_NONE); +} + +static void geo_node_mesh_primitive_circle_init(bNodeTree *UNUSED(ntree), bNode *node) +{ + NodeGeometryMeshCircle *node_storage = (NodeGeometryMeshCircle *)MEM_callocN( + sizeof(NodeGeometryMeshCircle), __func__); + + node_storage->fill_type = GEO_NODE_MESH_CIRCLE_FILL_NONE; + + node->storage = node_storage; +} + +namespace blender::nodes { + +static int circle_vert_total(const GeometryNodeMeshCircleFillType fill_type, const int verts_num) +{ + switch (fill_type) { + case GEO_NODE_MESH_CIRCLE_FILL_NONE: + case GEO_NODE_MESH_CIRCLE_FILL_NGON: + return verts_num; + case GEO_NODE_MESH_CIRCLE_FILL_TRIANGLE_FAN: + return verts_num + 1; + } + BLI_assert(false); + return 0; +} + +static int circle_edge_total(const GeometryNodeMeshCircleFillType fill_type, const int verts_num) +{ + switch (fill_type) { + case GEO_NODE_MESH_CIRCLE_FILL_NONE: + case GEO_NODE_MESH_CIRCLE_FILL_NGON: + return verts_num; + case GEO_NODE_MESH_CIRCLE_FILL_TRIANGLE_FAN: + return verts_num * 2; + } + BLI_assert(false); + return 0; +} + +static int circle_corner_total(const GeometryNodeMeshCircleFillType fill_type, const int verts_num) +{ + switch (fill_type) { + case GEO_NODE_MESH_CIRCLE_FILL_NONE: + return 0; + case GEO_NODE_MESH_CIRCLE_FILL_NGON: + return verts_num; + case GEO_NODE_MESH_CIRCLE_FILL_TRIANGLE_FAN: + return verts_num * 3; + } + BLI_assert(false); + return 0; +} + +static int circle_face_total(const GeometryNodeMeshCircleFillType fill_type, const int verts_num) +{ + switch (fill_type) { + case GEO_NODE_MESH_CIRCLE_FILL_NONE: + return 0; + case GEO_NODE_MESH_CIRCLE_FILL_NGON: + return 1; + case GEO_NODE_MESH_CIRCLE_FILL_TRIANGLE_FAN: + return verts_num; + } + BLI_assert(false); + return 0; +} + +static Mesh *create_circle_mesh(const float radius, + const int verts_num, + const GeometryNodeMeshCircleFillType fill_type) +{ + Mesh *mesh = BKE_mesh_new_nomain(circle_vert_total(fill_type, verts_num), + circle_edge_total(fill_type, verts_num), + 0, + circle_corner_total(fill_type, verts_num), + circle_face_total(fill_type, verts_num)); + MutableSpan<MVert> verts{mesh->mvert, mesh->totvert}; + MutableSpan<MLoop> loops{mesh->mloop, mesh->totloop}; + MutableSpan<MEdge> edges{mesh->medge, mesh->totedge}; + MutableSpan<MPoly> polys{mesh->mpoly, mesh->totpoly}; + + float angle = 0.0f; + const float angle_delta = 2.0f * M_PI / static_cast<float>(verts_num); + for (MVert &vert : verts) { + copy_v3_v3(vert.co, float3(std::cos(angle) * radius, std::sin(angle) * radius, 0.0f)); + angle += angle_delta; + } + if (fill_type == GEO_NODE_MESH_CIRCLE_FILL_TRIANGLE_FAN) { + copy_v3_v3(verts.last().co, float3(0)); + } + + /* Point all vertex normals in the up direction. */ + const short up_normal[3] = {0, 0, SHRT_MAX}; + for (MVert &vert : verts) { + copy_v3_v3_short(vert.no, up_normal); + } + + /* Create outer edges. */ + for (const int i : IndexRange(verts_num)) { + MEdge &edge = edges[i]; + edge.v1 = i; + edge.v2 = (i + 1) % verts_num; + } + + /* Set loose edge flags. */ + if (fill_type == GEO_NODE_MESH_CIRCLE_FILL_NONE) { + for (const int i : IndexRange(verts_num)) { + MEdge &edge = edges[i]; + edge.flag |= ME_LOOSEEDGE; + } + } + + /* Create triangle fan edges. */ + if (fill_type == GEO_NODE_MESH_CIRCLE_FILL_TRIANGLE_FAN) { + for (const int i : IndexRange(verts_num)) { + MEdge &edge = edges[verts_num + i]; + edge.v1 = verts_num; + edge.v2 = i; + } + } + + /* Create corners and faces. */ + if (fill_type == GEO_NODE_MESH_CIRCLE_FILL_NGON) { + MPoly &poly = polys[0]; + poly.loopstart = 0; + poly.totloop = loops.size(); + + for (const int i : IndexRange(verts_num)) { + MLoop &loop = loops[i]; + loop.e = i; + loop.v = i; + } + } + else if (fill_type == GEO_NODE_MESH_CIRCLE_FILL_TRIANGLE_FAN) { + for (const int i : IndexRange(verts_num)) { + MPoly &poly = polys[i]; + poly.loopstart = 3 * i; + poly.totloop = 3; + + MLoop &loop_a = loops[3 * i]; + loop_a.e = i; + loop_a.v = i; + MLoop &loop_b = loops[3 * i + 1]; + loop_b.e = verts_num + ((i + 1) % verts_num); + loop_b.v = (i + 1) % verts_num; + MLoop &loop_c = loops[3 * i + 2]; + loop_c.e = verts_num + i; + loop_c.v = verts_num; + } + } + + return mesh; +} + +static void geo_node_mesh_primitive_circle_exec(GeoNodeExecParams params) +{ + const bNode &node = params.node(); + const NodeGeometryMeshCircle &storage = *(const NodeGeometryMeshCircle *)node.storage; + + const GeometryNodeMeshCircleFillType fill_type = (const GeometryNodeMeshCircleFillType) + storage.fill_type; + + const int verts_num = params.extract_input<int>("Vertices"); + if (verts_num < 3) { + params.set_output("Geometry", GeometrySet()); + return; + } + + const float radius = params.extract_input<float>("Radius"); + const float3 location = params.extract_input<float3>("Location"); + const float3 rotation = params.extract_input<float3>("Rotation"); + + Mesh *mesh = create_circle_mesh(radius, verts_num, fill_type); + + 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_circle() +{ + static bNodeType ntype; + + geo_node_type_base(&ntype, GEO_NODE_MESH_PRIMITIVE_CIRCLE, "Circle", NODE_CLASS_GEOMETRY, 0); + node_type_socket_templates( + &ntype, geo_node_mesh_primitive_circle_in, geo_node_mesh_primitive_circle_out); + node_type_init(&ntype, geo_node_mesh_primitive_circle_init); + node_type_storage( + &ntype, "NodeGeometryMeshCircle", node_free_standard_storage, node_copy_standard_storage); + ntype.geometry_node_execute = blender::nodes::geo_node_mesh_primitive_circle_exec; + ntype.draw_buttons = geo_node_mesh_primitive_circle_layout; + nodeRegisterType(&ntype); +} |