Fishing2/Packages/com.nwh.dynamicwaterphysics/Runtime/Lib/MIConvexHull/Triangulation.cs

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// ║    Copyright © 2025 NWH Coding d.o.o.  All rights reserved.    ║
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/******************************************************************************
 *
 * The MIT License (MIT)
 *
 * MIConvexHull, Copyright (c) 2015 David Sehnal, Matthew Campbell
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 *****************************************************************************/

#region

using System.Collections.Generic;
using System.Linq;

#endregion

namespace NWH.DWP2.MiConvexHull
{
    /// <summary>
    /// Simple interface to unify different types of triangulations in the future.
    /// </summary>
    /// <typeparam name="TVertex"> The type of the t vertex. </typeparam>
    /// <typeparam name="TCell"> The type of the t cell. </typeparam>
    public interface ITriangulation<TVertex, TCell>
        where TCell : TriangulationCell<TVertex, TCell>, new()
        where TVertex : IVertex
    {
        /// <summary>
        /// Triangulation simplexes. For 2D - triangles, 3D - tetrahedrons, etc ...
        /// </summary>
        /// <value> The cells. </value>
        IEnumerable<TCell> Cells { get; }
    }

    /// <summary>
    /// Factory class for creating triangulations.
    /// </summary>
    public static class Triangulation
    {
        /// <summary>
        /// Creates the Delaunay triangulation of the input data.
        /// </summary>
        /// <typeparam name="TVertex"> The type of the t vertex. </typeparam>
        /// <param name="data"> The data. </param>
        /// <param name="config"> If null, default TriangulationComputationConfig is used. </param>
        /// <returns> ITriangulation&lt;TVertex, DefaultTriangulationCell&lt;TVertex&gt;&gt;. </returns>
        public static ITriangulation<TVertex, DefaultTriangulationCell<TVertex>> CreateDelaunay<TVertex>(
            IList<TVertex> data)
            where TVertex : IVertex
        {
            return DelaunayTriangulation<TVertex, DefaultTriangulationCell<TVertex>>.Create(data);
        }


        /// <summary>
        /// Creates the Delaunay triangulation of the input data.
        /// </summary>
        /// <param name="data"> The data. </param>
        /// <param name="config"> If null, default TriangulationComputationConfig is used. </param>
        /// <returns> ITriangulation&lt;DefaultVertex, DefaultTriangulationCell&lt;DefaultVertex&gt;&gt;. </returns>
        public static ITriangulation<DefaultVertex, DefaultTriangulationCell<DefaultVertex>> CreateDelaunay(
            IList<double[]> data)
        {
            List<DefaultVertex> points = data.Select(p => new DefaultVertex { Position = p, }).ToList();
            return DelaunayTriangulation<DefaultVertex, DefaultTriangulationCell<DefaultVertex>>.Create(points);
        }


        /// <summary>
        /// Creates the Delaunay triangulation of the input data.
        /// </summary>
        /// <typeparam name="TVertex"> </typeparam>
        /// <typeparam name="TFace"> </typeparam>
        /// <param name="data"> </param>
        /// <param name="config"> If null, default TriangulationComputationConfig is used. </param>
        /// <returns> </returns>
        public static ITriangulation<TVertex, TFace> CreateDelaunay<TVertex, TFace>(IList<TVertex> data)
            where TVertex : IVertex
            where TFace : TriangulationCell<TVertex, TFace>, new()
        {
            return DelaunayTriangulation<TVertex, TFace>.Create(data);
        }


        /// <summary>
        /// Create the voronoi mesh.
        /// </summary>
        /// <typeparam name="TVertex"> </typeparam>
        /// <typeparam name="TCell"> </typeparam>
        /// <typeparam name="TEdge"> </typeparam>
        /// <param name="data"> </param>
        /// <param name="config"> If null, default TriangulationComputationConfig is used. </param>
        /// <returns> </returns>
        public static VoronoiMesh<TVertex, TCell, TEdge> CreateVoronoi<TVertex, TCell, TEdge>(IList<TVertex> data)
            where TCell : TriangulationCell<TVertex, TCell>, new()
            where TVertex : IVertex
            where TEdge : VoronoiEdge<TVertex, TCell>, new()
        {
            return VoronoiMesh<TVertex, TCell, TEdge>.Create(data);
        }


        /// <summary>
        /// Create the voronoi mesh.
        /// </summary>
        /// <typeparam name="TVertex"> </typeparam>
        /// <param name="data"> </param>
        /// <param name="config"> If null, default TriangulationComputationConfig is used. </param>
        /// <returns> </returns>
        public static
            VoronoiMesh
            <TVertex, DefaultTriangulationCell<TVertex>, VoronoiEdge<TVertex, DefaultTriangulationCell<TVertex>>>
            CreateVoronoi<TVertex>(IList<TVertex> data)
            where TVertex : IVertex
        {
            return
                VoronoiMesh
                <TVertex, DefaultTriangulationCell<TVertex>, VoronoiEdge<TVertex, DefaultTriangulationCell<TVertex>>
                >.Create(data);
        }


        /// <summary>
        /// Create the voronoi mesh.
        /// </summary>
        /// <param name="data"> </param>
        /// <param name="config"> If null, default TriangulationComputationConfig is used. </param>
        /// <returns> </returns>
        public static
            VoronoiMesh
            <DefaultVertex, DefaultTriangulationCell<DefaultVertex>,
                VoronoiEdge<DefaultVertex, DefaultTriangulationCell<DefaultVertex>>>
            CreateVoronoi(IList<double[]> data)
        {
            List<DefaultVertex> points = data.Select(p => new DefaultVertex { Position = p.ToArray(), }).ToList();
            return
                VoronoiMesh
                <DefaultVertex, DefaultTriangulationCell<DefaultVertex>,
                    VoronoiEdge<DefaultVertex, DefaultTriangulationCell<DefaultVertex>>>.Create(points);
        }


        /// <summary>
        /// Create the voronoi mesh.
        /// </summary>
        /// <typeparam name="TVertex"> </typeparam>
        /// <typeparam name="TCell"> </typeparam>
        /// <param name="data"> </param>
        /// <param name="config"> If null, default TriangulationComputationConfig is used. </param>
        /// <returns> </returns>
        public static VoronoiMesh<TVertex, TCell, VoronoiEdge<TVertex, TCell>> CreateVoronoi<TVertex, TCell>(
            IList<TVertex> data)
            where TVertex : IVertex
            where TCell : TriangulationCell<TVertex, TCell>, new()
        {
            return VoronoiMesh<TVertex, TCell, VoronoiEdge<TVertex, TCell>>.Create(data);
        }
    }
}