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Add mesh comparison functions, for tests

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numzero 2023-12-17 18:03:01 +03:00 • committed by rubenwardy
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src/unittest/mesh_compare.h Normal file
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/*
Minetest
Copyright (C) 2023 Vitaliy Lobachevskiy
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser 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.
*/
#pragma once
#include <array>
#include <vector>
#include <irrlichttypes.h>
#include <S3DVertex.h>
/// Represents a triangle as three vertices.
/// “Smallest” (according to <) vertex is expected to be first, others should follow in the counter-clockwise order.
using Triangle = std::array<video::S3DVertex, 3>;
/// Represents a quad as four vertices.
/// Vertices should be in the counter-clockwise order.
using Quad = std::array<video::S3DVertex, 4>;
/// Compare two meshes for equality.
/// @param vertices Vertices of the first mesh. Order doesn’t matter.
/// @param indices Indices of the first mesh. Triangle order doesn’t matter. Vertex order in a triangle only matters for winding.
/// @param expected The second mesh, in an expanded form. Must be sorted.
/// @returns Whether the two meshes are equal.
[[nodiscard]] bool checkMeshEqual(const std::vector<video::S3DVertex> &vertices, const std::vector<u16> &indices, const std::vector<Triangle> &expected);
/// Compare two meshes for equality.
/// @param vertices Vertices of the first mesh. Order doesn’t matter.
/// @param indices Indices of the first mesh. Triangle order doesn’t matter. Vertex order in a triangle only matters for winding.
/// @param expected The second mesh, in a quad form.
/// @returns Whether the two meshes are equal.
/// @note There are two ways to split a quad into 2 triangles; either is allowed.
[[nodiscard]] bool checkMeshEqual(const std::vector<video::S3DVertex> &vertices, const std::vector<u16> &indices, const std::vector<Quad> &expected);