f6c30bfe45
This adds a `unit_test_compare` function to `Curves`. Compares the curves. Curves are the same if: * The number of points matches. * The number of curves matches. * The attribute names are the same and have the same type. * The point attribute values are within the `threshold`. * The curve topology matches (e.g. the curve sizes are the same). * The curve attribute values are within the `threshold`. * The indices of the points and curves are the same (can be ignored if this should be treated as the same). The implementation reuses the same functions as the existing comparison function for meshes. Pull Request: https://projects.blender.org/blender/blender/pulls/131164
50 lines
1.7 KiB
C++
50 lines
1.7 KiB
C++
/* SPDX-FileCopyrightText: 2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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#pragma once
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#include "BKE_curves.hh"
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#include "BKE_mesh_types.hh"
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/** \file
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* \ingroup bke
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*/
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namespace blender::bke::compare_geometry {
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enum class GeoMismatch : int8_t;
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/**
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* Convert the mismatch to a human-readable string for display.
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*/
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const char *mismatch_to_string(const GeoMismatch &mismatch);
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/**
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* \brief Checks if the two meshes are different, returning the type of mismatch if any. Changes in
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* index order are detected, but treated as a mismatch.
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*
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* \details Instead of just blindly comparing the two meshes, the code tries to determine if they
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* are isomorphic. Two meshes are considered isomorphic, if, for each domain, there is a bijection
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* between the two meshes such that the bijections preserve connectivity.
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*
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* In general, determining if two graphs are isomorphic is a very difficult problem (no polynomial
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* time algorithm is known). Because we have more information than just connectivity (attributes),
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* we can compute it in a more reasonable time in most cases.
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*
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* \returns The type of mismatch that was detected, if there is any.
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*/
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std::optional<GeoMismatch> compare_meshes(const Mesh &mesh1, const Mesh &mesh2, float threshold);
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/**
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* \brief Checks if the two curves geometries are different, returning the type of mismatch if any.
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* Changes in index order are detected, but treated as a mismatch.
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*
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* \returns The type of mismatch that was detected, if there is any.
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*/
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std::optional<GeoMismatch> compare_curves(const CurvesGeometry &curves1,
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const CurvesGeometry &curves2,
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float threshold);
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} // namespace blender::bke::compare_geometry
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