diff options
Diffstat (limited to 'source/blender/nodes/geometry/nodes/node_geo_curve_to_mesh.cc')
| -rw-r--r-- | source/blender/nodes/geometry/nodes/node_geo_curve_to_mesh.cc | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/source/blender/nodes/geometry/nodes/node_geo_curve_to_mesh.cc b/source/blender/nodes/geometry/nodes/node_geo_curve_to_mesh.cc new file mode 100644 index 00000000000..b6f04352929 --- /dev/null +++ b/source/blender/nodes/geometry/nodes/node_geo_curve_to_mesh.cc @@ -0,0 +1,313 @@ +/* + * 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_array.hh" +#include "BLI_float4x4.hh" +#include "BLI_timeit.hh" + +#include "DNA_mesh_types.h" +#include "DNA_meshdata_types.h" + +#include "BKE_material.h" +#include "BKE_mesh.h" +#include "BKE_spline.hh" + +#include "UI_interface.h" +#include "UI_resources.h" + +#include "node_geometry_util.hh" + +static bNodeSocketTemplate geo_node_curve_to_mesh_in[] = { + {SOCK_GEOMETRY, N_("Curve")}, + {SOCK_GEOMETRY, N_("Profile Curve")}, + {-1, ""}, +}; + +static bNodeSocketTemplate geo_node_curve_to_mesh_out[] = { + {SOCK_GEOMETRY, N_("Mesh")}, + {-1, ""}, +}; + +namespace blender::nodes { + +static void vert_extrude_to_mesh_data(const Spline &spline, + const float3 profile_vert, + MutableSpan<MVert> r_verts, + MutableSpan<MEdge> r_edges, + int &vert_offset, + int &edge_offset) +{ + Span<float3> positions = spline.evaluated_positions(); + + for (const int i : IndexRange(positions.size() - 1)) { + MEdge &edge = r_edges[edge_offset++]; + edge.v1 = vert_offset + i; + edge.v2 = vert_offset + i + 1; + edge.flag = ME_LOOSEEDGE; + } + + if (spline.is_cyclic() && spline.evaluated_edges_size() > 1) { + MEdge &edge = r_edges[edge_offset++]; + edge.v1 = vert_offset; + edge.v2 = vert_offset + positions.size() - 1; + edge.flag = ME_LOOSEEDGE; + } + + for (const int i : positions.index_range()) { + MVert &vert = r_verts[vert_offset++]; + copy_v3_v3(vert.co, positions[i] + profile_vert); + } +} + +static void mark_edges_sharp(MutableSpan<MEdge> edges) +{ + for (MEdge &edge : edges) { + edge.flag |= ME_SHARP; + } +} + +static void spline_extrude_to_mesh_data(const Spline &spline, + const Spline &profile_spline, + MutableSpan<MVert> r_verts, + MutableSpan<MEdge> r_edges, + MutableSpan<MLoop> r_loops, + MutableSpan<MPoly> r_polys, + int &vert_offset, + int &edge_offset, + int &loop_offset, + int &poly_offset) +{ + const int spline_vert_len = spline.evaluated_points_size(); + const int spline_edge_len = spline.evaluated_edges_size(); + const int profile_vert_len = profile_spline.evaluated_points_size(); + const int profile_edge_len = profile_spline.evaluated_edges_size(); + if (spline_vert_len == 0) { + return; + } + + if (profile_vert_len == 1) { + vert_extrude_to_mesh_data(spline, + profile_spline.evaluated_positions()[0], + r_verts, + r_edges, + vert_offset, + edge_offset); + return; + } + + /* Add the edges running along the length of the curve, starting at each profile vertex. */ + const int spline_edges_start = edge_offset; + for (const int i_profile : IndexRange(profile_vert_len)) { + for (const int i_ring : IndexRange(spline_edge_len)) { + const int i_next_ring = (i_ring == spline_vert_len - 1) ? 0 : i_ring + 1; + + const int ring_vert_offset = vert_offset + profile_vert_len * i_ring; + const int next_ring_vert_offset = vert_offset + profile_vert_len * i_next_ring; + + MEdge &edge = r_edges[edge_offset++]; + edge.v1 = ring_vert_offset + i_profile; + edge.v2 = next_ring_vert_offset + i_profile; + edge.flag = ME_EDGEDRAW | ME_EDGERENDER; + } + } + + /* Add the edges running along each profile ring. */ + const int profile_edges_start = edge_offset; + for (const int i_ring : IndexRange(spline_vert_len)) { + const int ring_vert_offset = vert_offset + profile_vert_len * i_ring; + + for (const int i_profile : IndexRange(profile_edge_len)) { + const int i_next_profile = (i_profile == profile_vert_len - 1) ? 0 : i_profile + 1; + + MEdge &edge = r_edges[edge_offset++]; + edge.v1 = ring_vert_offset + i_profile; + edge.v2 = ring_vert_offset + i_next_profile; + edge.flag = ME_EDGEDRAW | ME_EDGERENDER; + } + } + + /* Calculate poly and corner indices. */ + for (const int i_ring : IndexRange(spline_edge_len)) { + const int i_next_ring = (i_ring == spline_vert_len - 1) ? 0 : i_ring + 1; + + const int ring_vert_offset = vert_offset + profile_vert_len * i_ring; + const int next_ring_vert_offset = vert_offset + profile_vert_len * i_next_ring; + + const int ring_edge_start = profile_edges_start + profile_edge_len * i_ring; + const int next_ring_edge_offset = profile_edges_start + profile_edge_len * i_next_ring; + + for (const int i_profile : IndexRange(profile_edge_len)) { + const int i_next_profile = (i_profile == profile_vert_len - 1) ? 0 : i_profile + 1; + + const int spline_edge_start = spline_edges_start + spline_edge_len * i_profile; + const int next_spline_edge_start = spline_edges_start + spline_edge_len * i_next_profile; + + MPoly &poly = r_polys[poly_offset++]; + poly.loopstart = loop_offset; + poly.totloop = 4; + poly.flag = ME_SMOOTH; + + MLoop &loop_a = r_loops[loop_offset++]; + loop_a.v = ring_vert_offset + i_profile; + loop_a.e = ring_edge_start + i_profile; + MLoop &loop_b = r_loops[loop_offset++]; + loop_b.v = ring_vert_offset + i_next_profile; + loop_b.e = next_spline_edge_start + i_ring; + MLoop &loop_c = r_loops[loop_offset++]; + loop_c.v = next_ring_vert_offset + i_next_profile; + loop_c.e = next_ring_edge_offset + i_profile; + MLoop &loop_d = r_loops[loop_offset++]; + loop_d.v = next_ring_vert_offset + i_profile; + loop_d.e = spline_edge_start + i_ring; + } + } + + /* Calculate the positions of each profile ring profile along the spline. */ + Span<float3> positions = spline.evaluated_positions(); + Span<float3> tangents = spline.evaluated_tangents(); + Span<float3> normals = spline.evaluated_normals(); + Span<float3> profile_positions = profile_spline.evaluated_positions(); + + GVArray_Typed<float> radii = spline.interpolate_to_evaluated_points(spline.radii()); + for (const int i_ring : IndexRange(spline_vert_len)) { + float4x4 point_matrix = float4x4::from_normalized_axis_data( + positions[i_ring], normals[i_ring], tangents[i_ring]); + + point_matrix.apply_scale(radii[i_ring]); + + for (const int i_profile : IndexRange(profile_vert_len)) { + MVert &vert = r_verts[vert_offset++]; + copy_v3_v3(vert.co, point_matrix * profile_positions[i_profile]); + } + } + + /* Mark edge loops from sharp vector control points sharp. */ + if (profile_spline.type() == Spline::Type::Bezier) { + const BezierSpline &bezier_spline = static_cast<const BezierSpline &>(profile_spline); + Span<int> control_point_offsets = bezier_spline.control_point_offsets(); + for (const int i : IndexRange(bezier_spline.size())) { + if (bezier_spline.point_is_sharp(i)) { + mark_edges_sharp(r_edges.slice( + spline_edges_start + spline_edge_len * control_point_offsets[i], spline_edge_len)); + } + } + } +} + +static Mesh *curve_to_mesh_calculate(const CurveEval &curve, const CurveEval &profile_curve) +{ + int profile_vert_total = 0; + int profile_edge_total = 0; + for (const SplinePtr &profile_spline : profile_curve.splines()) { + profile_vert_total += profile_spline->evaluated_points_size(); + profile_edge_total += profile_spline->evaluated_edges_size(); + } + + int vert_total = 0; + int edge_total = 0; + int poly_total = 0; + for (const SplinePtr &spline : curve.splines()) { + const int spline_vert_len = spline->evaluated_points_size(); + const int spline_edge_len = spline->evaluated_edges_size(); + vert_total += spline_vert_len * profile_vert_total; + poly_total += spline_edge_len * profile_edge_total; + + /* Add the ring edges, with one ring for every curve vertex, and the edge loops + * that run along the length of the curve, starting on the first profile. */ + edge_total += profile_edge_total * spline_vert_len + profile_vert_total * spline_edge_len; + } + const int corner_total = poly_total * 4; + + if (vert_total == 0) { + return nullptr; + } + + Mesh *mesh = BKE_mesh_new_nomain(vert_total, edge_total, 0, corner_total, poly_total); + BKE_id_material_eval_ensure_default_slot(&mesh->id); + MutableSpan<MVert> verts{mesh->mvert, mesh->totvert}; + MutableSpan<MEdge> edges{mesh->medge, mesh->totedge}; + MutableSpan<MLoop> loops{mesh->mloop, mesh->totloop}; + MutableSpan<MPoly> polys{mesh->mpoly, mesh->totpoly}; + mesh->flag |= ME_AUTOSMOOTH; + mesh->smoothresh = DEG2RADF(180.0f); + + int vert_offset = 0; + int edge_offset = 0; + int loop_offset = 0; + int poly_offset = 0; + for (const SplinePtr &spline : curve.splines()) { + for (const SplinePtr &profile_spline : profile_curve.splines()) { + spline_extrude_to_mesh_data(*spline, + *profile_spline, + verts, + edges, + loops, + polys, + vert_offset, + edge_offset, + loop_offset, + poly_offset); + } + } + + BKE_mesh_calc_normals(mesh); + + return mesh; +} + +static CurveEval get_curve_single_vert() +{ + CurveEval curve; + std::unique_ptr<PolySpline> spline = std::make_unique<PolySpline>(); + spline->add_point(float3(0), 0, 0.0f); + curve.add_spline(std::move(spline)); + + return curve; +} + +static void geo_node_curve_to_mesh_exec(GeoNodeExecParams params) +{ + GeometrySet curve_set = params.extract_input<GeometrySet>("Curve"); + GeometrySet profile_set = params.extract_input<GeometrySet>("Profile Curve"); + + curve_set = bke::geometry_set_realize_instances(curve_set); + profile_set = bke::geometry_set_realize_instances(profile_set); + + if (!curve_set.has_curve()) { + params.set_output("Mesh", GeometrySet()); + return; + } + + const CurveEval *profile_curve = profile_set.get_curve_for_read(); + + static const CurveEval vert_curve = get_curve_single_vert(); + + Mesh *mesh = curve_to_mesh_calculate(*curve_set.get_curve_for_read(), + (profile_curve == nullptr) ? vert_curve : *profile_curve); + params.set_output("Mesh", GeometrySet::create_with_mesh(mesh)); +} + +} // namespace blender::nodes + +void register_node_type_geo_curve_to_mesh() +{ + static bNodeType ntype; + + geo_node_type_base(&ntype, GEO_NODE_CURVE_TO_MESH, "Curve to Mesh", NODE_CLASS_GEOMETRY, 0); + node_type_socket_templates(&ntype, geo_node_curve_to_mesh_in, geo_node_curve_to_mesh_out); + ntype.geometry_node_execute = blender::nodes::geo_node_curve_to_mesh_exec; + nodeRegisterType(&ntype); +} |