tetrahedron.h

/*****************************************************************************
 * VCLib                                                                     *
 * Visual Computing Library                                                  *
 *                                                                           *
 * Copyright(C) 2021-2025                                                    *
 * Visual Computing Lab                                                      *
 * ISTI - Italian National Research Council                                  *
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 * This program is distributed in the hope that it will be useful,           *
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the              *
 * Mozilla Public License Version 2.0                                        *
 * (https://www.mozilla.org/en-US/MPL/2.0/) for more details.                *
 ****************************************************************************/
 
#ifndef VCL_ALGORITHMS_MESH_CREATE_TETRAHEDRON_H
#define VCL_ALGORITHMS_MESH_CREATE_TETRAHEDRON_H
 
#include <vclib/mesh.h>
 
namespace vcl {
 
template<FaceMeshConcept MeshType>
MeshType createTetrahedron()
{
    using PositionType = MeshType::Vertex::PositionType;
    return createTetrahedron<MeshType>(
        PositionType(1, 1, 1),
        PositionType(-1, 1, -1),
        PositionType(-1, -1, 1),
        PositionType(1, -1, -1));
}
 
template<FaceMeshConcept MeshType, Point3Concept PositionType>
MeshType createTetrahedron(
    const PositionType& p0,
    const PositionType& p1,
    const PositionType& p2,
    const PositionType& p3)
{
    MeshType m;
 
    m.addVertices(p0, p1, p2, p3);
 
    m.reserveFaces(4);
    m.addFace(0, 1, 2);
    m.addFace(0, 2, 3);
    m.addFace(0, 3, 1);
    m.addFace(3, 2, 1);
 
    return m;
}
 
} // namespace vcl
 
#endif // VCL_ALGORITHMS_MESH_CREATE_TETRAHEDRON_H