//-----------------------------------------------------------------------
//-----------------------------------------------------------------------
//     file="mat4.cs"
//     Project: StgSharp
//     AuthorGroup: Nitload Space
//     Copyright (c) Nitload Space. All rights reserved.
//     
//     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.
//     
//-----------------------------------------------------------------------
//-----------------------------------------------------------------------
using StgSharp;
using StgSharp.Math;

using System;
using System.Numerics;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;

namespace StgSharp
{
    internal static unsafe partial class InternalIO
    {

        #region deinit_mat4


        [DllImport(SSC_libName, EntryPoint = "deinit_mat4",
            CallingConvention = CallingConvention.Cdecl)]
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        internal static extern void deinit_mat4(Mat4* mat);

        #endregion

        #region det

        [DllImport(SSC_libName, EntryPoint = "det_mat4",
            CallingConvention = CallingConvention.Cdecl)]
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        internal static extern unsafe float det_mat4(Mat4* matPtr, Mat4* transpose);

        #endregion


        #region transpose

        [DllImport(SSC_libName, EntryPoint = "transpose4to4",
            CallingConvention = CallingConvention.Cdecl)]
        internal static extern unsafe void Transpose4to4_internal(Mat4* source, Mat4* target);

        [DllImport(SSC_libName, EntryPoint = "transpose4to3",
            CallingConvention = CallingConvention.Cdecl)]
        internal static extern unsafe void Transpose4to3_internal(Mat4* source, Mat3* target);

        [DllImport(SSC_libName, EntryPoint = "transpose4to2",
            CallingConvention = CallingConvention.Cdecl)]
        internal static extern unsafe void Transpose4to2_internal(Mat4* source, Mat2* target);


        #endregion



    }
}
namespace StgSharp.Math
{


    [StructLayout(LayoutKind.Explicit, Size = 16 * sizeof(float))]
    public struct Mat4 : IEquatable<Mat4>, IMat
    {

        [FieldOffset(0)] internal Vector4 colum0;
        [FieldOffset(16)] internal Vector4 colum1;
        [FieldOffset(32)] internal Vector4 colum2;
        [FieldOffset(48)] internal Vector4 colum3;

        [FieldOffset(0)] public float m00;

        [FieldOffset(16)] public float m01;

        [FieldOffset(32)] public float m02;

        [FieldOffset(48)] public float m03;
        [FieldOffset(4)] public float m10;
        [FieldOffset(20)] public float m11;
        [FieldOffset(36)] public float m12;
        [FieldOffset(52)] public float m13;
        [FieldOffset(8)] public float m20;
        [FieldOffset(24)] public float m21;
        [FieldOffset(40)] public float m22;
        [FieldOffset(56)] public float m23;
        [FieldOffset(12)] public float m30;
        [FieldOffset(28)] public float m31;
        [FieldOffset(44)] public float m32;
        [FieldOffset(60)] public float m33;

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        internal Mat4(
            Vector4 colum0,
            Vector4 colum1,
            Vector4 colum2,
            Vector4 colum3
            )
        {
            this.colum0 = colum0;
            this.colum1 = colum1;
            this.colum2 = colum2;
            this.colum3 = colum3;
        }

        public override bool Equals(object? obj)
        {
            return (obj is Mat4 mat) && Equals(mat);
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public bool Equals(Mat4 other)
        {
            return colum0.Equals(other.colum0) &&
                   colum1.Equals(other.colum1) &&
                   colum2.Equals(other.colum2) &&
                   colum3.Equals(other.colum3);
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public static bool operator !=(Mat4 left, Mat4 right)
        {
            return !(left == right);
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public static bool operator ==(Mat4 left, Mat4 right)
        {
            return left.Equals(right);
        }

    }
}