Jacques Lucke
133095fff4
This splits out the code that samples points on a surface and the code that initializes new curves. This code will be reused by D15134. Differential Revision: https://developer.blender.org/D15216
55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#pragma once
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#include "BLI_float4x4.hh"
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#include "BLI_kdtree.h"
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#include "BLI_math_vector.hh"
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#include "BLI_span.hh"
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#include "BKE_bvhutils.h"
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#include "BKE_curves.hh"
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#include "DNA_mesh_types.h"
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#include "DNA_meshdata_types.h"
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namespace blender::geometry {
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struct AddCurvesOnMeshInputs {
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/** Information about the root points where new curves should be generated. */
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Span<float3> root_positions_cu;
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Span<float3> bary_coords;
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Span<int> looptri_indices;
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/** Determines shape of new curves. */
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bool interpolate_length = false;
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bool interpolate_shape = false;
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bool interpolate_point_count = false;
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float fallback_curve_length = 0.0f;
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int fallback_point_count = 0;
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/** Information about the surface that the new curves are attached to. */
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const Mesh *surface = nullptr;
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BVHTreeFromMesh *surface_bvh = nullptr;
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Span<MLoopTri> surface_looptris;
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Span<float2> surface_uv_map;
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Span<float3> corner_normals_su;
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/** Transformation matrices. */
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float4x4 curves_to_surface_mat;
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float4x4 surface_to_curves_normal_mat;
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/**
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* KD-Tree that contains the root points of existing curves. This is only necessary when
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* interpolation is used.
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*/
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KDTree_3d *old_roots_kdtree = nullptr;
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};
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/**
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* Generate new curves on a mesh surface with the given inputs. Existing curves stay intact.
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*/
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void add_curves_on_mesh(bke::CurvesGeometry &curves, const AddCurvesOnMeshInputs &inputs);
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} // namespace blender::geometry
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