diff options
Diffstat (limited to 'source/blender/geometry/GEO_add_curves_on_mesh.hh')
-rw-r--r-- | source/blender/geometry/GEO_add_curves_on_mesh.hh | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/source/blender/geometry/GEO_add_curves_on_mesh.hh b/source/blender/geometry/GEO_add_curves_on_mesh.hh new file mode 100644 index 00000000000..cf60a8e8ace --- /dev/null +++ b/source/blender/geometry/GEO_add_curves_on_mesh.hh @@ -0,0 +1,54 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +#pragma once + +#include "BLI_float4x4.hh" +#include "BLI_kdtree.h" +#include "BLI_math_vector.hh" +#include "BLI_span.hh" + +#include "BKE_bvhutils.h" +#include "BKE_curves.hh" + +#include "DNA_mesh_types.h" +#include "DNA_meshdata_types.h" + +namespace blender::geometry { + +struct AddCurvesOnMeshInputs { + /** Information about the root points where new curves should be generated. */ + Span<float3> root_positions_cu; + Span<float3> bary_coords; + Span<int> looptri_indices; + + /** Determines shape of new curves. */ + bool interpolate_length = false; + bool interpolate_shape = false; + bool interpolate_point_count = false; + float fallback_curve_length = 0.0f; + int fallback_point_count = 0; + + /** Information about the surface that the new curves are attached to. */ + const Mesh *surface = nullptr; + BVHTreeFromMesh *surface_bvh = nullptr; + Span<MLoopTri> surface_looptris; + Span<float2> surface_uv_map; + Span<float3> corner_normals_su; + + /** Transformation matrices. */ + float4x4 curves_to_surface_mat; + float4x4 surface_to_curves_normal_mat; + + /** + * KD-Tree that contains the root points of existing curves. This is only necessary when + * interpolation is used. + */ + KDTree_3d *old_roots_kdtree = nullptr; +}; + +/** + * Generate new curves on a mesh surface with the given inputs. Existing curves stay intact. + */ +void add_curves_on_mesh(bke::CurvesGeometry &curves, const AddCurvesOnMeshInputs &inputs); + +} // namespace blender::geometry |