Hans Goudey
21adf2ec89
This separates the UV reverse sampling and the barycentric mixing of the mesh attribute into separate multi-functions. This separates concerns and allows for future de-duplication of the UV sampling function if that is implemented as an optimization pass. That would be helpful since it's the much more expensive operation. This was simplified by returning the triangle index in the reverse UV sampler rather than a pointer to the triangle, which required passing a span of triangles separately in a few places.
63 lines
1.7 KiB
C++
63 lines
1.7 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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#include "GEO_reverse_uv_sampler.hh"
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namespace blender::geometry {
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struct AddCurvesOnMeshInputs {
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/** UV Coordinates at which the new curves should be added. */
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Span<float2> uvs;
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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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Span<MLoopTri> surface_looptris;
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const ReverseUVSampler *reverse_uv_sampler = nullptr;
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Span<float3> corner_normals_su;
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bke::CurvesSurfaceTransforms *transforms = nullptr;
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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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bool r_uv_error = false;
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};
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struct AddCurvesOnMeshOutputs {
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bool uv_error = false;
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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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AddCurvesOnMeshOutputs add_curves_on_mesh(bke::CurvesGeometry &curves,
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const AddCurvesOnMeshInputs &inputs);
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float3 compute_surface_point_normal(const MLoopTri &looptri,
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const float3 &bary_coord,
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const Span<float3> corner_normals);
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} // namespace blender::geometry
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